BD9285F Datasheet, PDF (7/39 Pages) Rohm – Boost 1channel white LED driver For large LCDs

BD9285F
●2.1.2 Pin ESD Type
FB
Datasheet
CS
TC54
Internal
vol.
TC54
1k
●2.2 Block diagram
VCC
Figure 4-2. Internal equivalent circuit
VIN
TC54
STB
RT
VCC
VREG
REG54
UVLO
OSC
Css
SS
FAILB
PWM1
PWM2
ADIM_P
SS
SS-FB
clamper
Fail
detect
+
-
4.0V
+
-
1.5V
ADIM
UVLO
OVP
VCC
UVLO
TSD
SCP
OVP
UVLO
PWM
COMP
CONTROL
LOGIC
Current
sense
VCC
GATE
CS
LEB
VCC
DIMOUT
OPEN LEDOCP
3.5V
ERROR
amp
ISENSE
FB
3.3V
10kΩ
GND
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TSZ22111・15・001
Package:SOP18
Figure 5. Block diagram
7/36
TSZ02201-0F1F0C100030-1-2
11.Jul.2012 Rev.001