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Rohm Semiconductor Electronic Components Datasheet

BD8119FM-M Datasheet

White Backlight LED Driver

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Datasheet
White Backlight LED Driver
For Medium to Large LCD Panels
(Switching Regulator Type)
BD8119FM-M
General Description
BD8119FM-M is a white LED driver with the capability
to withstand high input voltage (36V Max).
This driver has 4ch constant-current drivers integrated
in 1-chip. Each channel can draw up to 150mA max for
driving high brightness on LED. A current-mode
buck-boost DC/DC controller is also integrated to
achieve stable operation against unstable car-battery
voltage input. This also removes the constraint of the
number of LEDs in series connection. The brightness
can be controlled by either PWM or VDAC techniques.
Key Specifications
Input Supply Voltage Range:
Standby Current:
LED Maximum Output Current:
Operating Temperature Range:
5.0V to 30V
4µA (Typ)
150mA(Max)
-40°C to +95°C
Package
W(Typ) x D(Typ) x H(Max)
Features
Integrated buck-boost current-mode DC/DC
controller
Four integrated LED current driver channels
(150mA Max each channel)
PWM Light Modulation
(Minimum Pulse Width 25µs)
Built-in protection functions
(UVLO, OVP, TSD, OCP, SCP)
Abnormal status detection function
(OPEN/ SHORT)
HSOP-M28
18.50mm x 9.90mm x 2.41mm
Applications
Backlight for car navigation, dashboard panels, etc.
Product structure : Silicon monolithic integrated circuit
.www.rohm.com
© 2014 ROHM Co., Ltd. All rights reserved.
TSZ22111 14 001
This product has no designed protection against radioactive rays
1/27
TSZ02201-0T3T0C600030-1-2
28.Aug.2014 Rev.001


Rohm Semiconductor Electronic Components Datasheet

BD8119FM-M Datasheet

White Backlight LED Driver

No Preview Available !

BD8119FM-M
Pin Configuration
COMP 1
SS 2
VCC 3
EN 4
RT 5
SYNC 6
GND 7
(TOP VIEW)
28 VREG
27 BOOT
26 CS
25 OUTH
24 SW
23 DGND
22 OUTL
PWM 8
FAIL1 9
FAIL2 10
LEDEN1 11
LEDEN2 12
LED1 13
LED2 14
21 N.C.
20 PGND
19 ISET
18 VDAC
17 OVP
16 LED4
15 LED3
Pin Descriptions
Pin Symbol
Function
Pin Symbol
Function
1 COMP Error amplifier output
15 LED3 LED output 3
2 SS Soft start time-setting capacitance input
16 LED4 LED output 4
3 VCC Input power supply
17 OVP Over-voltage detection input
4 EN Enable input
18 VDAC DC variable light modulation input
5 RT Oscillation frequency-setting resistance input 19 ISET LED output current-setting resistance input
6 SYNC External synchronization signal input
20 PGND LED output GND
7 GND Small-signal GND
21 - No Connection
8 PWM PWM light modulation input
22 OUTL Low-side external MOSFET Gate Drive output
9 FAIL1 Failure signal output
23 DGND Low-side internal MOSFET Source output
10 FAIL2 LED open/short detection signal output
24 SW High-side external MOSFET Source pin
11 LEDEN1 LED output enable pin 1
25 OUTH High-side external MOSFET Gate Drive outpin
12 LEDEN2 LED output enable pin 2
26 CS DC/DC Current Sense Pin
13 LED1 LED output 1
27 BOOT High-side MOSFET Power Supply pin
14 LED2 LED output 2
28 VREG Internal reference voltage output
www.rohm.com
© 2014 ROHM Co., Ltd. All rights reserved.
TSZ2211115001
2/27
TSZ02201-0T3T0C600030-1-2
28.Aug.2014 Rev.001


Part Number BD8119FM-M
Description White Backlight LED Driver
Maker ROHM
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