BD9470AEFV Datasheet, PDF (8/39 Pages) Rohm – White LED driver for medium sized and large sized LCD back light

BD9470AFM・BD9470AEFV
● Block Diagram
VIN
CIN
VCC
VCC
C VCC STB
RT
CREG
REG58
UVLO
VREG
UVLO
(VCC)
UVLO
TSD
OS DET
SCP OVP
Timer
LOGIC
PWM COMP
+
-
OSC
+
+
Control
Logic
Driver
REG58
SS
Use at
At sink source mode
Css
AGND
FB
Rpc
Cpc
SS FB
Clamp
SS
SS_END
ERR AMP
Current
Sence
-
-
-
-
-
-
+
PWM1
PWM2
PWM3
PWM4
PWM5
PWM6
3V
1.5V
ISET
ISET
SS_END
Current driver
Open-Short
Detect
4V
0.9V
OSDET
OVP
FAIL
N
CS
DCDC_GND
LED1
LED2
LED3
LED4
LED5
LED6
LEDGND
LSP
+
COUT
Figure 7. Block Diagram
●Characteristic date(reference date)
10
9
8
7
6
5
4
3
9
14
19
24
29
34
VCC[V]
Figure 8. ICC[mA] vs VCC[V]
7.0
6.5
6.0
5.5
5.0
9
14
19
24
29
34
VCC[V]
Figure 9. REG58[V] vs VCC[V]
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TSZ22111・15・001
8/35
TSZ02201-0F10C1002000-1-2
19.Oct.2013 Rev.003