ZSLS7025 [ETC]
Boost LED Driver;
ETC 
ZSLS7025
Boost LED Driver
Brief Description
Features
Wide application input voltage range: 5V to 100V
(Higher voltage supported. See section 2.1 in the
data sheet.)
The ZSLS7025, one of our ZSLS Family of LED
control ICs, is a constant current boost converter
designed for driving high-brightness LEDs. It is
optimal for driving multiple white LEDs connected
in series so that the LED current is uniform for
better brightness and color control. The wide input
range and high output current enables diverse
industrial, after-market automotive, and consumer
lighting applications.
Constant current output limited only by external
component selection
No loop compensation required
Internal over-voltage protection
Internal over-temperature protection
Brightness control via PWM or DC voltage control
signal input
The ZSLS7025 output current is adjustable via an
external current sense resistor and can deliver
stable constant output current from a few milliamps
up to 2A or higher.
SOP-8 package
Benefits
The ZSLS7025 drives a constant current into the
load. The control loop features a pulse frequency
modulated (PFM) architecture that is inherently
stable and does not need loop compensation.
High efficiency: up to 95%
Minimum bill of materials
Small form-factor package
The ZSLS7025 supports pulse-width modulation
(PWM) or linear voltage dimming, which allows
flexible control of the LED luminance.
Available Support
Demonstration Kit
The ZSLS7025 can operate in applications with a
wide input voltage range from 5V to 100V. An
integrated over-voltage protection (OVP) circuit
protects the system, even under no-load
conditions. The over-voltage protection is
adjustable via external resistors R1 and R2.
Physical Characteristics
Junction temperature: -40°C to 125°C
RoHS compliant
For additional information on our LED driver family,
visit www.zmdi.com/products/led-drivers/
ZSLS7025 Typical Application Circuit
VIN =5 to 100 VDC
L1
D1
CIN
RVDD
ZSLS7025
COUT
LED
VDD
GATE
CS
Q1
R1
String
TOFF
ADJ
FB
CVDD
GND
OVP
RTOFF
RCS
R2
RFB
© 2012 Zentrum Mikroelektronik Dresden AG — Rev. 1.00
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.
ZSLS7025
Boost LED Driver
ZSLS7025 Block Diagram
5 to 100 VDC
VIN
L1
D1
RVDD
5V Clamp
VDD
TOFF
2
Current
Mirror
COUT
Voltage
Regulator
Block
Vref1 (1.0V)
Vref2 (0.3V)
Vref3 (0.25V)
Vref4 (0.05V)
ZSLS7025
1
CIN
CVDD
RTOFF
+
-
VDD
50k
Vref1
Vref4
-
+
ADJ
3
Q1
Blanking
500ns
900k
100k
S
n LED
R
Q
GATE
-
+
5
FB
-
CS
6
+
Vref2
Vref1
7
+
-
UVLO
POR
Vref3
R1
R2
OVP
8
-
+
RCS
RFB
GND
4
Typical Applications
Retro-fit Lighting
MR16 Lights
Architectural/Building Lighting
Replacement Tubes
LED Backlighting
SELV Lighting
Signage and Outdoor Lighting
General Purpose Low-Voltage Industrial and Consumer Applications
Ordering Information
Product Sales Code
ZSLS7025-ZI1R
Description
ZSLS7025 – Boost LED Driver
Package
SOP-8 (Tape & Reel)
ZSLS7025KIT-D1
ZSLS7025PCB-D1 Demo Board, 1 ZLED-PCB10, and 5 ZSLS7025 ICs Kit
Sales and Further Information
www.zmdi.com
LED_Drivers@zmdi.com
Zentrum Mikroelektronik
Dresden AG
Grenzstrasse 28
01109 Dresden
Germany
ZMD America, Inc.
1525 McCarthy Blvd., #212
Milpitas, CA 95035-7453
USA
Zentrum Mikroelektronik
Dresden AG, Japan Office
2nd Floor, Shinbashi Tokyu Bldg. Keelung Road
ZMD FAR EAST, Ltd.
3F, No. 51, Sec. 2,
Zentrum Mikroelektronik
Dresden AG, Korean Office
POSCO Centre Building
West Tower, 11th Floor
892 Daechi, 4-Dong,
Kangnam-Gu
4-21-3, Shinbashi, Minato-ku
Tokyo, 105-0004
Japan
11052 Taipei
Taiwan
Seoul, 135-777
Korea
Phone +49 (0)351.8822.7.533 Phone +855-ASK-ZMDI
Fax +49 (0)351.8822.8.7533 (+855.275.9634)
Phone +81.3.6895.7410
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Fax +886.2.2377.8199 Fax +82.2.559.0700
Fax
+81.3.6895.7301
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.
© 2012 Zentrum Mikroelektronik Dresden AG — Rev. 1.00
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.
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Authorized Distributor
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