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
V
IN
L
1
R
VDD
VDD
C
IN
C
VDD
1
Voltage
Regulator
Block
VDD
-
D
1
5V Clamp
Vref1 (1.0V)
Vref2 (0.3V)
Vref3 (0.25V)
Vref4 (0.05V)
ZSLS7025
+
Current
Mirror
TOFF
C
OUT
2
R
TOFF
Vref1
Vref4
50k
-
+
ADJ
3
900k
Blanking
500ns
S
R Q
GATE
+
-
Q1
n LED
100k
5
FB
CS
+
-
UVLO
POR
+
Vref2
7
R
1
OVP
6
Vref3
-
-
+
Vref1
8
R
CS
R
2
R
FB
GND
4
Typical Applications
Retro-fit Lighting
MR16 Lights
SELV Lighting
Signage and Outdoor Lighting
Architectural/Building Lighting
Replacement Tubes
LED Backlighting
General Purpose Low-Voltage Industrial and Consumer Applications
Ordering Information
Product Sales Code
ZSLS7025-ZI1R
ZSLS7025KIT-D1
Description
ZSLS7025 – Boost LED Driver
ZSLS7025PCB-D1 Demo Board, 1 ZLED-PCB10, and 5 ZSLS7025 ICs
Kit
Package
SOP-8 (Tape & Reel)
Sales and Further Information
Zentrum Mikroelektronik
Dresden AG
Grenzstrasse 28
01109 Dresden
Germany
ZMD America, Inc.
1525 McCarthy Blvd., #212
Milpitas, CA 95035-7453
USA
www.zmdi.com
Zentrum Mikroelektronik
Dresden AG, Japan Office
2nd Floor, Shinbashi Tokyu Bldg.
4-21-3, Shinbashi, Minato-ku
Tokyo, 105-0004
Japan
LED_Drivers@zmdi.com
Zentrum Mikroelektronik
Dresden AG, Korean Office
POSCO Centre Building
West Tower, 11th Floor
892 Daechi, 4-Dong,
Kangnam-Gu
Seoul, 135-777
Korea
Phone +82.2.559.0660
Fax
+82.2.559.0700
ZMD FAR EAST, Ltd.
3F, No. 51, Sec. 2,
Keelung Road
11052 Taipei
Taiwan
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
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.
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.
ZSLS7025
Boost LED Driver
Contents
1
IC Characteristics .......................................................................................................................................................... 6
Input Current ........................................................................................................................................................ 11
LED Current Control ............................................................................................................................................ 11
Dimming Control .................................................................................................................................................. 11
Dimming Control Using an External DC Control Signal ................................................................................ 12
Dimming Control Using an RC Filter to Convert a PWM Signal to a DC Voltage.......................................... 13
Peak Input Current Control .................................................................................................................................. 14
Switching Frequency and Inductor Value ............................................................................................................. 15
DC Power Loss .................................................................................................................................................... 16
Application Example ............................................................................................................................................ 20
Ordering Information ................................................................................................................................................... 27
Document Revision History ......................................................................................................................................... 27
SOP-8 Package Dimensions and Pin Assignments ...................................................................................... 26
List of Tables
Table 1.1
Table 1.2
Table 1.3
Table 6.1
Absolute Maximum Ratings ............................................................................................................................ 6
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