ZSLS7025ZI1R ZMDI, ZSLS7025ZI1R Datasheet - Page 21

• Manufacturer Part Number: ZSLS7025ZI1R
• Description: LED Lighting Drivers LED Driver
• Manufacturer: ZMDI

Specifications of ZSLS7025ZI1R

• Rohs: yes
• Input Voltage: 5 V
• Maximum Supply Current: 400 uA
• Maximum Operating Temperature: + 125 C
• Mounting Style: SMD/SMT
• Package / Case: SOIC-8
• Minimum Operating Temperature: - 40 C

Figure 4.2
4.4.1
Assume I
Choose C
4.4.2
The recommended value for t
Choose R
4.4.3
Choose C3 = 220μF/63V (low ESR electrolytic capacitor).
Data Sheet
June 28, 2012
ZSLS7025
Boost LED Driver
R
IN
Selecting R
Selecting R
Selecting R
VDD
R
t
= 2.5mA.
OFF
FB
Application Design Example – RC Filter PWM Dimming Circuit

IN
TOFF
_

MIN
V
as 220μF/35V and C
V
IN
FB
I
= 24kΩ.
© 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
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OUT
V
I


IN
_
IN
40
V
C
VDD
TOFF
FB
TH
C
DD
VDD
IN

to Set Output Current and C3
, C

10

to Set Minimum t
. 0
IN
k 3

86
R
12
, and C
OFF_MIN

VDD


R
R
TOFF
TOFF
is 1μs.
VDD
VDD
VDD
TOFF
ADJ
GND

as 10μF/16V.
1
ZSLS7025

s
OFF
L
1
GATE
OVP
CS
FB
PWM Control Signal
Q
R
1
CS
D
1
R
R
R
1
2
5
C
OUT
R
4
R
3
C
1
String
LED
R
FB
(14)
(15)
(16)
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