ZSLS7025ZI1R ZMDI, ZSLS7025ZI1R Datasheet - Page 12
![no-image](/images/no-image-200.jpg)
ZSLS7025ZI1R
Manufacturer Part Number
ZSLS7025ZI1R
Description
LED Lighting Drivers LED Driver
Manufacturer
ZMDI
Datasheet
1.ZSLS7025ZI1R.pdf
(27 pages)
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
2.6.1
The LED output current can be set below the nominal average value defined by equation (2) using an external DC
voltage control signal superimposed on the FB pin as shown in the example circuit in Figure 2.2. As the DC
control signal, V
FB pin. This causes the ZSLS7025 to compensate by reducing the output current through the LED string.
Consequently, the output current is inversely proportional to the DC control voltage.
Note: It is important to ensure that the LED output voltage V
dimming applications.
The output current controlled by the DC voltage on FB can be calculated using equation (3).
Where
Figure 2.2
Data Sheet
June 28, 2012
ZSLS7025
Boost LED Driver
I
V
V
OUT
FB
DC
= Internal feedback reference voltage (see section 1.3, parameter 1.3.11)
= External DC control voltage
= Output current through the LED(s) with a DC control voltage
Dimming Control Using an External DC Control Signal
I
OUT
Example Circuit for Controlling Output Current via an External DC Control Voltage
DC
V
FB
, increases, the current through R
© 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.
V
IN
C
=5 to 100 VDC
C
VDD
R
IN
3
R
FB
V
R
R
DC
VDD
4
R
TOFF
V
FB
VDD
TOFF
ADJ
GND
ZSLS7025
L
1
GATE
OVP
3
CS
FB
increases with a subsequent increase in the voltage at the
DC Control Signal V
OUT
Q
R
1
CS
D
remains higher than the input voltage V
1
DC
= 0 to 5V
R
R
1
2
C
OUT
R
4
R
3
String
LED
R
FB
12 of 27
(3)
IN
in