Data Sheet
Rev. 1.1 / August 2010
ZLED7001
Universal LED Driver with Temperature Compensation
ZLED7001
Universal LED Driver with Temperature Compensation
© 2010 Zentrum Mikroelektronik Dresden AG — Rev. 1.1
All rights reserved. The material contained herein may not be reproduced, adapted, merged, translated, stored, or used without the prior written consent of the copyright owner.
The information furnished in this publication is subject to changes without notice.
Brief Description
The ZLED7001, one of our ZLED family of LED control
ICs, is a peak current-mode control LED driver IC that is
optimal for buck LED driver applications. The ZLED7001
operates in constant off-time mode. Capable of
operating efficiently with voltage sources ranging from 8
VDC to 450 VDC or rectified 110 VAC/ 220 VAC, it is
ideal for High Brightness (HB) LED applications. The
ZLED7001 provides a PWM input for an external
dimming control signal. The ZLED7001’s linear dimming
input can be used both for linear dimming (0 to 240 mV)
and temperature compensation of the LED current.
Because the ZLED7001’s response time is limited only
by the rate of change in the inductor current, it attains a
high performance pulse-width modulation (PWM) dim-
ming response. The ZLED7001 ensures proper output
current regulation, without loop compensation, via peak
current-mode operation.
ZLED7001 Application Circuit
VREF
LD
PWMD
CS
GATE
ZLED7001
VS
nLED
L1
R2
NTC
CIN
C1
R1
8 to 450 VDC
8
5
6
2
3
1
GND
4
TOFF
7
VIN
D1
COFF
RCS
CLED
RIN
Q1
ZLED7001 Features
Wide input range from 8 VDC to 450 VDC or
110 VAC/220 VAC
Temperature compensation to protect the LEDs and
extend LED lifetime
Operates in constant off-time mode
Both PWM and linear dimming control signal inputs
available
Very few external components needed for operation
Broad range of applications: outputs greater than 1A
Application Examples
Line-powered replacement LED lighting
Illuminated LED signs and other displays
LED street and traffic lighting
Constant-current source for general purposes
Architecture / building LED lighting
LED backlighting
Line powered LED flood lighting
Interior / exterior LED lighting
ZLED7001
Universal LED Driver with Temperature Compensation
© 2010 Zentrum Mikroelektronik Dresden AG — Rev. 1.1
All rights reserved. The material contained herein may not be reproduced, adapted, merged, translated, stored, or used without the prior written consent of the copyright owner.
ZLED7001 Block Diagram
SOP-8 Package Dimensions (mm, except )
A 1.550 ± 0.200 E 3.900 ± 0.100
A1 0.175 ± 0.075 E1 6.020 ± 0.220
A2 1.450 Typical e 1.270 Typical
b 0.420 ± 0.070 L 0.835 ± 0.435
c 0.214 ± 0.036 θ 4° ± 4°
D 4.900 ± 0.100
Ordering Information
Sales Code Description Package
ZLED7001-ZI1R ZLED7001 – Universal LED Driver with Temperature Compensation SOP8 (Tape & Reel)
ZLED7001Kit-E1 ZLED7001 Evaluation Board up to 24VAC / 40VDC, including 1 ZLED-PCB1 Kit
ZLED-PCB1 Test PCB with one 3W white HB-LED, cascadable to one multiple LED string Printed Circuit Board
ZLED-PCB2 10 unpopulated test PCBs for modular LED string with footprints of 9 common HB-LED types Printed Circuit Board
Sales and Further Information www.zmdi.com LED_Drivers@zmdi.com
Zentrum Mikroelektronik
Dresden AG (ZMD AG)
Grenzstrasse 28
01109 Dresden
Germany
ZMD America, Inc.
8413 Excelsior Drive
Suite 200
Madison, WI 53717
USA
Zentrum Mikroelektronik
Dresden AG, Japan Office
2nd Floor, Shinbashi Tokyu Bldg.
4-21-3, Shinbashi, Minato-ku
Tokyo, 105-0004
Japan
ZMD FAR EAST, Ltd.
3F, No. 51, Sec. 2,
Keelung Road
11052 Taipei
Taiwan
Phone +49 (0)351.8822.7.533
Fax +49(0)351.8822.8.7533
Phone +1 (608) 829-1987
Fax +1 (631) 549-2882
Phone +81.3.6895.7410
Fax +81.3.6895.7301
Phone +886.2.2377.8189
Fax +886.2.2377.8199
DISCLAIMER: This information applies to a product under development. Its characteristics and specifications are subject to change without notice. Zentrum Mikroelektronik Dresden AG (ZMD AG) assumes no obligation
regarding future manufacture unless otherwise agreed to in writing. The information furnished hereby is believed to be true and accurate. However, under no circumstances shall ZMD AG be liable to any customer, licensee, or
any other third party for any special, indirect, incidental, or consequential damages of any kind or nature whatsoever arising out of or in any way related to the furnishing, performance, or use of this technical data. ZMD AG
hereby expressly disclaims any liability of ZMD AG to any customer, licensee or any other third party, and any such customer, licensee and any other third party hereby waives any liability of ZMD AG for any damages in
connection with or arising out of the furnishing, performance or use of this technical data, whether based on contract, warranty, tort (including negligence), strict liability, or otherwise.
ZLED7001
Universal LED Driver with Temperature Compensation
Data Sheet
August 12, 2010
© 2010 Zentrum Mikroelektronik Dresden AG — Rev. 1.1
All rights reserved. The material contained herein may not be reproduced, adapted, merged, translated, stored, or used without
the prior written consent of the copyright owner. The information furnished in this publication is subject to changes without
notice.
4 of 15
Contents
1 IC Characteristics .......................................................................................................................................................... 5
1.1. Absolute Maximum Ratings ................................................................................................................................... 5
1.2. Operating Conditions ............................................................................................................................................. 5
1.3. Electrical Parameters............................................................................................................................................. 5
2 Circuit Description ......................................................................................................................................................... 7
2.1. ZLED7001 Block Diagram ..................................................................................................................................... 7
2.2. Application Signal Flow.......................................................................................................................................... 7
2.3. Input Voltage Regulator ......................................................................................................................................... 8
2.4. Current Sensing..................................................................................................................................................... 9
2.5. Timing Circuit ......................................................................................................................................................... 9
2.6. PWM Dimming Application Circuit ......................................................................................................................... 9
2.7. Linear Dimming Application Circuit ........................................................................................................................ 9
2.8. Temperature Compensation ................................................................................................................................ 10
2.9. Design Example................................................................................................................................................... 10
3 ESD/Latch-Up-Protection ............................................................................................................................................ 12
4 Pin Configuration and Package................................................................................................................................... 13
5 Ordering Information ................................................................................................................................................... 15
6 Document Revision History ......................................................................................................................................... 15
List of Figures
Figure 2.1 Input Current .................................................................................................................................................. 8
Figure 4.1 Pin Configuration ZLED7001........................................................................................................................ 13
Figure 4.2 Package Drawing SOP-8.............................................................................................................................. 14
List of Tables
Table 1.1 Absolute Maximum Ratings............................................................................................................................ 5
Table 1.2 Operating Conditions...................................................................................................................................... 5
Table 1.3 Electrical Conditions ....................................................................................................................................... 5
Table 4.1 Pin Description SOP-8.................................................................................................................................. 13
Table 4.2 Package Dimensions SOP-8 ........................................................................................................................ 14
ZLED7001
Universal LED Driver with Temperature Compensation
Data Sheet
August 12, 2010
© 2010 Zentrum Mikroelektronik Dresden AG — Rev. 1.1
All rights reserved. The material contained herein may not be reproduced, adapted, merged, translated, stored, or used without
the prior written consent of the copyright owner. The information furnished in this publication is subject to changes without
notice.
5 of 15
1 IC Characteristics
1.1. Absolute Maximum Ratings
Table 1.1 Absolute Maximum Ratings
No. PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNIT
1.1.1 Input voltage VIN -0.3 8 V
1.1.2 Voltage to GND at pin CS,
LD, PWMD, GATE, TOFF,
VREF
VCS, VLD,
VPWMD,
VGATE,
VTOFF, VVREF
-0.3 6 V
1.1.3 Input current VIN pin 1 I
VIN 1 10 mA
1.1.4 Junction temperature Tj MAX 150 °C
1.1.5 Storage temperature TST -55 150 °C
1.2. Operating Conditions
Table 1.2 Operating Conditions
No. PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNIT
1.2.1 Operating temperature TOP -40 +85 °C
1.2.2 Input DC supply voltage VINDC Resistor RIN required
between DC supply
voltage and VIN pin with
resistance determined by
equation (2) and with
proper voltage rating. 2
8 450 V
1.3. Electrical Parameters
Production testing of the chip is performed at 25°C. Functional operation of the chip and specified parameters
at other temperatures are guaranteed by design, characterization, and process control.
Test conditions: VIN = 12V; Tamb = 25°C; RIN=2k; unless otherwise noted.
Table 1.3 Electrical Conditions
No. PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNIT
1.3.1 VIN clamp voltage VINCL Always higher than under
voltage lockout threshold
6.6 7.1 7.6 V
1.3.2 Operation current IIN VIN= 6V, GATE floating 0.33 0.5 0.64 mA
1.3.3 Under voltage lockout
threshold
VULO VIN rising 6.1 6.5 6.8 V
1.3.4 Under voltage lockout
hysteresis
VULO V
IN falling 500 mV
1.3.5 PWMD pin input low
voltage
VENL 1.2 V
1 Beyond the input current range, VIN might not clamp at 7.1V
2 This parameter limit is guaranteed by design, characterization, and application check. See equation (2) on page 8
ZLED7001
Universal LED Driver with Temperature Compensation
Data Sheet
August 12, 2010
© 2010 Zentrum Mikroelektronik Dresden AG — Rev. 1.1
All rights reserved. The material contained herein may not be reproduced, adapted, merged, translated, stored, or used without
the prior written consent of the copyright owner. The information furnished in this publication is subject to changes without
notice.
6 of 15
No. PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNIT
1.3.6 PWMD pin input high
voltage
VENH 2 V
1.3.7 PWMD pin pull-up
resistance
REN 100 k
1.3.8 Current sense threshold
voltage
VCSTH 215 240 265 mV
1.3.9 LD pin voltage low
threshold
VLDL 50 mV
1.3.10 LD pin voltage high
threshold
VLDH 240 mV
1.3.11 Current sense blanking
interval
TBLANK 400 480 550 ns
1.3.12 Output delay tDELAY V
CS = VCSTH + 50mV,
after TBLANK
30 ns
1.3.13 OFF time TOFF T
OFF pin floating 480 510 550 ns
1.3.14 GATE output rise time tRISE C
GATE = 500pF 19 ns
1.3.15 GATE output fall time tFALL C
GATE = 500pF 29 ns
1.3.16 REF pin voltage VREF 1.12 1.20 1.30 V
1.3.17 REF pin load current IREF 0.5 mA
1.3.18 Load regulation of
reference voltage
VREFLOAD I
REF = 0 to 500µA,
PWMD = 5.0V
0.5 5 mV
ZLED7001
Universal LED Driver with Temperature Compensation
Data Sheet
August 12, 2010
© 2010 Zentrum Mikroelektronik Dresden AG — Rev. 1.1
All rights reserved. The material contained herein may not be reproduced, adapted, merged, translated, stored, or used without
the prior written consent of the copyright owner. The information furnished in this publication is subject to changes without
notice.
7 of 15
2 Circuit Description
The ZLED7001 is a peak current-mode-control LED driver IC that operates in constant off-time mode,
enabling proper LED current control without additional loop compensation or high-side current sensing. The
ZLED7001 supports both linear and PWM control of the LED current. Only a few external components are
needed for typical applications. It is well-suited for buck LED driver applications.
2.1. ZLED7001 Block Diagram
Bandgap
Blanking
480ns
RS
POR
UVLO
nLED
L1
R2
NTC
5
6
D1
RCS
CLED
Q1
VS
CIN
C1
R1
8 to 450 VDC
2
3
1
RIN
CS
LD
VREF
VIN
PWMD
GATE
GND 4
7
COFF
TOFF
ZLED7001 Timing
Circuit
7.1V Clamp
R
R
R
0.24V
0.05V +
+
–
–
+
–
0.24V
Driver
R
S
Q
CMP1
CMP2
CMP3
8
vdda
vdda
vddd
Voltage
Regulator
REN
2.2. Application Signal Flow
A capacitor between the TOFF pin and ground determines the internal timer’s off-time. The timer pulses set flip-
flop in the ZLED7001, turning on the GATE pin driver, which is connected to the Q1 external MOSFET. When
Q1 turns on, a ramp current flows through the LED(s), the L1 external inductor, and the external sense
resistor RCS. This results in a ramp voltage applied at the CS pin, which the ZLED7001’s two internal
comparators continually compare to the voltage at its LD pin and its internal 240mV reference. If either
comparator goes high and the blanking time is expired (see Table 1.3), the flip-flop is reset, causing the GATE
pin output to go low, shutting off the current through the LED(s).
The peak current control scheme with constant off-time can easily operate at duty cycles higher than 0.5 and
also gives inherent input voltage rejection, making the LED current almost insensitive to input voltage
variations.
ZLED7001
Universal LED Driver with Temperature Compensation
Data Sheet
August 12, 2010
© 2010 Zentrum Mikroelektronik Dresden AG — Rev. 1.1
All rights reserved. The material contained herein may not be reproduced, adapted, merged, translated, stored, or used without
the prior written consent of the copyright owner. The information furnished in this publication is subject to changes without
notice.
8 of 15
2.3. Input Voltage Regulator
The value and rating of the RIN input resistor must be selected as needed to drop the application supply
voltage (Vs) to the proper operating voltage for the ZLED7001 specified in section 1 (see equation (2) below).
When these conditions are met, the ZLED7001’s internal input voltage regulator maintains a stable 7.1V
(typical) at the VIN pin to power the ZLED7001. A low-equivalent-series-resistance (ESR) bypass capacitor is
required on the VIN pin to provide a low-impedance path for the GATE pin output driver’s high frequency
current.
The VIN pin draws an input current that is the sum of the 0.5mA (typical) required by the internal circuit and the
average current drawn by the GATE driver. The GATE driver current is primarily determined by the GATE
charge (QG) and switching frequency (fs) of the external MOSFET as shown in equation (1).
SGIN fQmA5.0I
(1)
Where
fS = Switching frequency
G
Q= External MOSFET gate charge (refer to the MOSFET data sheet)
The input resistor RIN value is given by equation (2).
IN
ININDC
IN IVV
R
(2)
For two typical MOSFET types, the following IIN diagram will result:
Figure 2.1 Input Current
ZLED7001
Universal LED Driver with Temperature Compensation
Data Sheet
August 12, 2010
© 2010 Zentrum Mikroelektronik Dresden AG — Rev. 1.1
All rights reserved. The material contained herein may not be reproduced, adapted, merged, translated, stored, or used without
the prior written consent of the copyright owner. The information furnished in this publication is subject to changes without
notice.
9 of 15
2.4. Current Sensing
Assuming a 30% current ripple in the inductor, the sense resistor RCS can be calculated as shown in
equation (3):
LED
CSTH
CS I15.1 V
R
(3)
Where
VCSTH = 240mV (typical)
The current sense input of the ZLED7001 is connected to the non-inverting inputs of two comparators. The
inverting terminal of one comparator is tied to an internal 240mV reference and the inverting terminal of the
other comparator is connected to the LD pin. The outputs of both comparators are fed into an OR gate, and
the output of the OR gate is connected to the reset pin of the flip-flop. Thus, the comparator that has the lower
voltage at the inverting input determines when the GATE output is turned off.
The comparator outputs also include a typical 480ns blanking time that prevents spurious turn-offs of the
external MOSFET due to the turn-on spike normally present as a result of transistor gate-source capacitance.
In rare cases, this internal blanking time might not be enough to filter out the turn-on spike. If so, an external
RC filter must be added between the external sense resistor (RCS) and the CS pin.
Note that the comparators are relatively fast: 80ns typical response time. Invalid triggering by these com-
parators could result if the layout fails to minimize external inductances.
2.5. Timing Circuit
The timing circuit in the ZLED7001 is controlled by a single capacitor connected from TOFF to ground.
TOFF, the time of the cycle period, is given by equation (4):
pF10
C
1ns510T OFF
TIME_OFF (4)
2.6. PWM Dimming Application Circuit
For PWM dimming applications, the ZLED7001’s PWMD pin is driven with a low-frequency square-wave
control signal. The GATE pin’s driver is enabled when the control signal is high and disabled when the control
signal is low. The LED current’s rise and fall rate is controlled only by the inductance value, the supply
voltage, and LED forward voltage.
If the PWMD pin is allowed to float, the PWM dimming function is disabled.
2.7. Linear Dimming Application Circuit
For linear dimming applications, an external voltage ranging from 50mV (typical) to 240mV (typical) is applied
to the LD (linear dimming) pin to control the LED current during operation. Linear dimming can be used to
adjust the LED current level to reduce the LED’s brightness. In this case, connect a resistor between the
VREF pin and the LD pin and connect a negative-temperature-coefficient (NTC) thermistor between the LD
pin and ground. The ZLED7001 can also provide temperature compensation, (see the application circuit on
page 2 and section 2.8).
ZLED7001
Universal LED Driver with Temperature Compensation
Data Sheet
August 12, 2010
© 2010 Zentrum Mikroelektronik Dresden AG — Rev. 1.1
All rights reserved. The material contained herein may not be reproduced, adapted, merged, translated, stored, or used without
the prior written consent of the copyright owner. The information furnished in this publication is subject to changes without
notice.
10 of 15
A group of modules based on the ZLED7001 can be matched in LED brightness using the linear dimming
input with the PWM dimming feature still available for overall brightness control.
If the LD pin is not used, it must be connected to the PWMD pin, which is internally pulled-up. When the LD
pin voltage drops below 50mV, the GATE output is switched off.
2.8. Temperature Compensation
ZLED7001 provides thermal protection for the connected LEDs. Applying an NTC thermistor close to the LED
string will enable the temperature compensation of the LED current. Refer to the application circuit on page 2.
If the temperature of the LEDs rises, the resistance of the NTC thermistor decreases until the voltage of the
LD pin falls below 240mV. Then the average current is controlled by the LD pin and the temperature
compensation function starts. The upper threshold to start compensation is given by equation (5):
1RR R
VmV240~V
NTC
NTC
REFLDH (5)
Considering the limit for IREF, under all conditions R1 must be selected larger than 2.2k. Assuming a 30%
inductor current ripple, the temperature compensated continuous current can be computed as shown in
equation (6):
1RR R
R15.1 V
I
NTC
NTC
S
REF
OUT (6)
When the LD pin voltage drops below 50mV (typical), the GATE output is switched off. The transition to
dimming as well as the switch-off is reversible as soon as the respective thresholds are exceeded after the
LED assembly cools. Adding a capacitor C1 from the LD pin to ground will reduce noise on the LD input.
2.9. Design Example
A common application for an AC-line-powered ZLED7001 is luminants with a string of several LEDs operated
by one driver. For the example, the following constraints are assumed:
Application: 15W LED luminant with 13 HB LEDs in 1 string
AC supply voltage: VINAC = 230 VAC
Average DC supply voltage: VINDC 280 VDC resulting after bridge rectification and filtering with a 10F
capacitor; power factor correction is not considered.
LED string forward voltage: VF = 13*3.3V 43V
LED string average current: ILED = 350mA
IC Input Resistor (RIN) and Hold Capacitor (CIN):
For a given 2N60 MOSFET and a maximum expected switching frequency of 100kHz, the IC input current will
be
mAkHznCmAfQmAI SGIN 4.1)1009(5.05.0
ZLED7001
Universal LED Driver with Temperature Compensation
Data Sheet
August 12, 2010
© 2010 Zentrum Mikroelektronik Dresden AG — Rev. 1.1
All rights reserved. The material contained herein may not be reproduced, adapted, merged, translated, stored, or used without
the prior written consent of the copyright owner. The information furnished in this publication is subject to changes without
notice.
11 of 15
Resulting in a supply resistor of
k
mAVV
IVV
RIN
ININDC
IN 195
4.1
7280
An 180k type can be chosen with a power rating of 0.5W. CIN is chosen to be a 10F/ 10V capacitor.
TOFF Time Capacitor (COFF)
The selection of the operation frequency is based on a tradeoff between higher frequencies allowing for
smaller and less expensive inductors and lower frequencies incurring lower losses in the power switch.
An estimation of the duty cycle D is based on the ratio of output voltage over input voltage:
15.0
280
43
__
_
V
V
VV
TT T
DINDC
F
TIMEOFFTIMEON
TIMEON
A timing capacitor of 220pF yields
s
pF
pF
s
pF
C
sT OFF
TIMEOFF
7.11
10
220
151.0
10
151.0
_
Resulting in an operation frequency of
kHz
sT D
fTIMEOFF
O72
7.11
15.011
_
Inductor (L1)
The inductance L1 is determined by the LED string’s forward voltage, the off-time, and the acceptable current
ripple. Assuming a ripple of 30% of the average current yields
mH
mA
sV
ITV
LRipple
TIMEOFFF 8.4
350%30
7.1143
_
Lower ripple at the same average current will increase the lifetime of the LEDs but requires a more expensive
higher value inductor and increased thermal losses since the inductor’s DC resistance will increase as well.
The DC resistance of the inductor is an important design parameter, too. A capacitor placed in parallel with
the array of LEDs can be used to reduce the LED current ripple while keeping the same average current.
The inductor chosen must have a saturation current higher than the peak output current and a continuous
current rating above the required mean output current. The circuit design must also consider the decrease of
inductance and saturation current with rising temperature.
Current Sense Resistor (RCS)
With peak current-mode control, the output is switched off when the LED current reaches its maximum value
summing up the average LED current and half of the defined current ripple, yielding for the given example
mA
mA
mA
I
II Ripple
AVGLEDPEAKO 5.402
2
350%30
350
2
)(_
The current sense resistor can now be calculated from the internal comparator threshold VCSTH and the peak
current as
596.0
5.402
240
_mA
mV
IV
RPEAKO
CSTH
CS
This value can be built by a 0.68 in parallel with a 4.7 type.
ZLED7001
Universal LED Driver with Temperature Compensation
Data Sheet
August 12, 2010
© 2010 Zentrum Mikroelektronik Dresden AG — Rev. 1.1
All rights reserved. The material contained herein may not be reproduced, adapted, merged, translated, stored, or used without
the prior written consent of the copyright owner. The information furnished in this publication is subject to changes without
notice.
12 of 15
MOSFET (Q1) and Diode (D1)
The MOSFET and diode must be dimensioned with a minimum 50% safety rating of their relevant voltage and
current parameters. Thus a FET with minimum 500V drain-source breakdown voltage and 0.6A drain current
as well as a fast recovery diode with at least 500V reverse voltage and a 0.6A forward current may be
selected.
3 ESD/Latch-Up-Protection
All pins have an ESD protection of >± 2000V according human body model (HBM). The ESD test follows the
Human Body Model with 1.5 k/100 pF based on MIL 883-G, Method 3015.7
Latch-up protection of >± 100mA has been proven based on JEDEC No. 78A Feb. 2006, temperature class 1.
ZLED7001
Universal LED Driver with Temperature Compensation
Data Sheet
August 12, 2010
© 2010 Zentrum Mikroelektronik Dresden AG — Rev. 1.1
All rights reserved. The material contained herein may not be reproduced, adapted, merged, translated, stored, or used without
the prior written consent of the copyright owner. The information furnished in this publication is subject to changes without
notice.
13 of 15
4 Pin Configuration and Package
Figure 4.1 Pin Configuration ZLED7001
V
IN
T
OFF
CS
GATEGND
LD
PWMD
V
REF
Table 4.1 Pin Description SOP-8
Pin Name NO. Description
VREF 1 1.2V reference voltage. No bypass capacitor needed.
PWMD 2 PWM dimming input. The gate driver operates normally if PWMD is pulled high. The gate driver is
turned off if PWMD is pulled to GND or open.
LD 3 Linear dimming input. If the voltage at LD is < 240mV (typical), LD controls the current sense
threshold. Can also be used as temperature compensation threshold voltage.
GND 4 Internal circuit ground reference. Electrical connection to ground is required.
GATE 5 Output for external N-channel power MOSFET gate driver.
CS 6
Current sense pin that senses the Q1 MOSFET drain current through external resistor RCS. The GATE
output goes low if the voltage at CS > the voltage at the LD pin or the internal 240mV.
TOFF 7
Sets the off-time of the power MOSFET. If left floating, off-time will be 510ns. For increased off-time, a
capacitor must be connected between TOFF and GND.
VIN 8
Supply input of 8V to 450V through a resistor, clamped at 7.1V internally. Low-ESR bypass capacitor
to GND is required.
ZLED7001
Universal LED Driver with Temperature Compensation
Data Sheet
August 12, 2010
© 2010 Zentrum Mikroelektronik Dresden AG — Rev. 1.1
All rights reserved. The material contained herein may not be reproduced, adapted, merged, translated, stored, or used without
the prior written consent of the copyright owner. The information furnished in this publication is subject to changes without
notice.
14 of 15
Figure 4.2 Package Drawing SOP-8
Table 4.2 Package Dimensions SOP-8
Dimension (mm) Dimension (mm, except )
Symbol
Min Max
Symbol
Min Max
A 1.350 1.750 E 3.800 4.000
A1 0.100 0.250 E1 5.800 6.240
A2 1.450 Typical e 1.270 Typical
b 0.350 0.490 L 0.400 1.270
c 0.178 0.250 0° 8°
D 4.800 5.000
The SOP-8 package has a thermal resistance (junction to ambient) of RJA = 80 K/W.
ZLED7001
Universal LED Driver with Temperature Compensation
Data Sheet
August 12, 2010
© 2010 Zentrum Mikroelektronik Dresden AG — Rev. 1.1
All rights reserved. The material contained herein may not be reproduced, adapted, merged, translated, stored, or used without
the prior written consent of the copyright owner. The information furnished in this publication is subject to changes without
notice.
15 of 15
5 Ordering Information
Product Sales Code Description Package
ZLED7001-ZI1R ZLED7001 – Universal LED Driver with Temperature Compensation SOP8 (Tape & Reel)
ZLED7001Kit-E1 ZLED7001 Evaluation Board up to 24VAC / 40VDC, including 1 ZLED-
PCB1
Kit
ZLED-PCB1 Test PCB with one 3W white HB-LED, cascadable to one multiple LED
string
Printed Circuit Board
ZLED-PCB2 10 unpopulated test PCBs for modular LED string with footprints of 9
common HB-LED types
Printed Circuit Board
6 Document Revision History
Revision Date Description
1.0 June 2, 2010 Production release version
1.1 August 12, 2010 Removed references to thermal shutdown protection in “Features” section and in
section 2.9. Updated contact information
Updated block diagram connection for correct PWMD internal connection.
Sales and Further Information www.zmdi.com LED_Drivers@zmdi.com
Zentrum Mikroelektronik
Dresden AG (ZMD AG)
Grenzstrasse 28
01109 Dresden
Germany
ZMD America, Inc.
8413 Excelsior Drive
Suite 200
Madison, WI 53717
USA
Zentrum Mikroelektronik
Dresden AG, Japan Office
2nd Floor, Shinbashi Tokyu Bldg.
4-21-3, Shinbashi, Minato-ku
Tokyo, 105-0004
Japan
ZMD FAR EAST, Ltd.
3F, No. 51, Sec. 2,
Keelung Road
11052 Taipei
Taiwan
Phone +49 (0)351.8822.7.533
Fax +49(0)351.8822.8.7533
Phone +1 (608) 829-1987
Fax +1 (631) 549-2882
Phone +81.3.6895.7410
Fax +81.3.6895.7301
Phone +886.2.2377.8189
Fax +886.2.2377.8199
DISCLAIMER: This information applies to a product under development. Its characteristics and specifications are subject to change without notice. Zentrum Mikroelektronik Dresden
AG (ZMD AG) assumes no obligation regarding future manufacture unless otherwise agreed to in writing. The information furnished hereby is believed to be true and accurate.
However, under no circumstances shall ZMD AG be liable to any customer, licensee, or any other third party for any special, indirect, incidental, or consequential damages of any kind
or nature whatsoever arising out of or in any way related to the furnishing, performance, or use of this technical data. ZMD AG hereby expressly disclaims any liability of ZMD AG to
any customer, licensee or any other third party, and any such customer, licensee and any other third party hereby waives any liability of ZMD AG for any damages in connection with
or arising out of the furnishing, performance or use of this technical data, whether based on contract, warranty, tort (including negligence), strict liability, or otherwise.
