BD9415FS Datasheet, PDF (3/34 Pages) Rohm – White LED Driver for 4Ch Large LCD Panels (DC/DC converter type)

BD9415FS
1.5 Block Diagram
VIN CIN
VCC
REG 90
STB
UVLO
L
VREG
LED OPEN / SHORT
PROTECT
SCP OVP
UVLO
Auto - Restart
Control
CONTROL
LOGIC
RT
+
OSC
PWM
COMP
CURRENT
SENSE
SSFB
SSOK
ERROR
AMP
+--------
LED SHORT
PROTECT
COMP1 ₊
-
LSP
4V
2800kΩ
1200kΩ
LED OPEN
PROTECT
COMP4
+
-
× 6. 7
COMP1
-
+
Di
FILTER
OVP
REG 90
DRIVER
FAILB
N
CS
LEB
PGND
LED 1
+
G1
-
S1
LED 2
+
G2
-
S2
LED 3
+
G3
-
S3
LED 4
+
G4
-
S4
VREF
1/ 5
COUT
+
DUTYON
DUTY P
PWM 1
PWM 4
AGND
300kΩ
Over Duty
Protection
300kΩ
300kΩ
COMP4
-
+
Figure 4. Block Diagram
www.rohm.com
© 2015 ROHM Co., Ltd. All rights reserved.
TSZ22111・15・001
3/30
TSZ02201-0F2F0C100140-1-2
23.May.2016 Rev.001