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BD8119FM-ME2 Datasheet(PDF) 5 Page - Rohm

Part # BD8119FM-ME2
Description  White Backlight LED Driver for Medium to Large LCD Panels (Switching Regulator Type)
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Manufacturer  ROHM [Rohm]
Direct Link  http://www.rohm.com
Logo ROHM - Rohm

BD8119FM-ME2 Datasheet(HTML) 5 Page - Rohm

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Technical Note
5/20
www.rohm.com
2010.08 - Rev.A
© 2010 ROHM Co., Ltd. All rights reserved.
BD8119FM-M
●
Block diagram
Fig.13
●
Pin layout
●
Pin function table
Fig.14
Pin
Symbol
Function
1
COMP
Error amplifier output
2
SS
Soft start time-setting capacitance input
3
VCC
Input power supply
4
EN
Enable input
5
RT
Oscillation frequency-setting resistance input
6
SYNC
External synchronization signal input
7
GND
Small-signal GND
8
PWM
PWM light modulation input
9
FAIL1
Failure signal output
10
FAIL2
LED open/short detection signal output
11
LEDEN1 LED output enable pin 1
12
LEDEN2 LED output enable pin 2
13
LED1
LED output 1
14
LED2
LED output 2
15
LED3
LED output 3
16
LED4
LED output 4
17
OVP
Over-voltage detection input
18
VDAC
DC variable light modulation input
19
ISET
LED output current-setting resistance input
20
PGND
LED output GND
21
-
N.C.
22
OUTL
Low-side external MOSFET Gate Drive out put
23
DGND
Low-side internal MOSFET Source out put
24
SW
High-side external MOSFET Source pin
25
OUTH
High-side external MOSFET Gate Drive out pin
26
CS
DC/DC Current Sense Pin
27
BOOT
High-side MOSFET Power Supply pin
28
VREG
Internal reference voltage output
COMP 1
2
3
4
5
6
7
8
9
10
11
12
13
14
28
27
26
25
24
23
22
21
20
19
18
17
16
15
SS
VCC
EN
RT
SYNC
GND
PWM
FAIL1
FAIL2
LEDEN1
LEDEN2
LED2
LED1
VREG
BOOT
CS
OUTH
SW
DGND
OUTL
N.C.
PGND
ISET
VDAC
OVP
LED3
LED4
DGND
RT
COMP
ERR AMP
Vin
VREG
＋
－
VCC
EN
RT
OVP
OSC
SS
Control Logic
UVLO
TSD
－
－
＋
SS
PWM
LED1
LED2
LED3
Current driver
ISET
PGND
PWM
CIN
RPC
CPC
CSS
CS
RISET
FAIL1
－
VREG
VDAC
GND
ISET
LED4
－
BOOT
OUTH
SW
＋
－
FAIL2
LEDEN1
LEDEN2
COUT
SYNC
RPC
CRT
Ccomp
VREG
OVP
Timer
Latch
PWM
OCP
DRV
CTL
SLOPE
OCP OVP
Open Short Detect
Timer
Latch
Short Det
Open Det
OUTL


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