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What is BD9421F?

This electronic component, produced by the manufacturer "ROHM Semiconductor", performs the same function as "LED Drivers".


BD9421F Datasheet PDF - ROHM Semiconductor

Part Number BD9421F
Description LED Drivers
Manufacturers ROHM Semiconductor 
Logo ROHM Semiconductor Logo 


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Datasheet
LED Drivers for LCD Backlights
White LED Driver for large LCD Panels
(DCDC Converter Type)
BD9421F
General Description
BD9421F is high efficiency driver for white LED. This is
designed for large sized LCD. BD9421F is built-in
DCDC converters that supply appropriate voltage for
light source.
BD9421F is also built-in protection function for
abnormal state such as OVP: over voltage protection,
OCP: over current limit protection of DCDC, SCP: short
circuit protection, open detection of LED string.
Thus this is used for conditions of large output voltage
and load conditions.
Features
6ch LED constant current driver(External PNP Tr
Type)
Maximum LED setting current 500mA(VREF Pin
setting)
±2% LED current accuracy(VREF=0.9V setting)
Built-in DC/DC converter
Analog Dimming(Linear) function
LED protection function(OPEN/SHORT
protection)[PWM-independent Type]
Individual detection and individual LED OFF for both
OPEN and SHORT circuit
VOUT Over Voltage Protection(OVP) and reduced
voltage protection(SCP) circuit
Built-in under voltage lockout function(UVLO) and
over voltage protection(OVP)
Built-in VOUT discharge circuit while shutdown
Key Specifications
VCC Supply Voltage Range:
9.0V to 35.0V
DCDC Oscillation Frequency: 150kHz(RT=100k)
Operation Circuit Current:
5mA(Typ)
Operating Temperature Range: -40°C to +85°C
Applications
LED driver for TV, Monitor and LCD Back Light
Package
SOP24
W(Typ) x D(Typ) x H(Max)
15.00mm x 7.80mm x 2.01mm
Pin Pitch 1.27mm
Figure 1. SOP24
Typical Application Circuit
Figure 2. Typical Application Circuit
Product structure : Silicon monolithic integrated circuit
.www.rohm.com
© 2013 ROHM Co., Ltd. All rights reserved.
TSZ22111 • 14 • 001
This product has no designed protection against radioactive rays
1/27
TSZ02201-0F1F0C100310-1-2
31.Jan.2014 Rev.002
http://www.Datasheet4U.com

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BD9421F equivalent
BD9421F
Pin Descriptions
Pin No.
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
Pin Name
REG75
N
PGND
CS
FB
VREF
BS1
BS2
BS3
BS4
BS5
BS6
CL6
CL5
CL4
CL3
CL2
CL1
PWM
OVP
RT
AGND
STB
VCC
Function
7.5V regulator output for N output pin
DC/DC switching output pin
Power GND
DCDC external NMOS current monitor pin
DCDC phase-compensation pin
LED voltage setting pin
PNP Tr Base connecting pin1
PNP Tr Base connecting pin2
PNP Tr Base connecting pin3
PNP Tr Base connecting pin4
PNP Tr Base connecting pin5
PNP Tr Base connecting pin6
PNP Tr collector current detection pin6
PNP Tr collector current detection pin5
PNP Tr collector current detection pin4
PNP Tr collector current detection pin3
PNP Tr collector current detection pin2
PNP Tr collector current detection pin1
Dimming signal input pin
Overvoltage protection detection pin
DCDC frequency setting resistor connection pin
Analog GND
Enable pin
Power supply pin
Datasheet
www.rohm.com
© 2013 ROHM Co., Ltd. All rights reserved.
TSZ22111 • 15 • 001
5/27
TSZ02201-0F1F0C100310-1-2
31.Jan.2014 Rev.002
http://www.Datasheet4U.com


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On this page, you can learn information such as the schematic, equivalent, pinout, replacement, circuit, and manual for BD9421F electronic component.


Information Total 30 Pages
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Featured Datasheets

Part NumberDescriptionMFRS
BD9421FThe function is LED Drivers. ROHM SemiconductorROHM Semiconductor

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