LED Driver. BD94122F Datasheet

BD94122F Driver. Datasheet pdf. Equivalent

Part BD94122F
Description White LED Driver
Feature Datasheet LED Drivers for LCD Backlights PFC Direct Current Resonance Type White LED Driver for Lar.
Manufacture ROHM
Total Page 27 Pages
Datasheet
Download BD94122F Datasheet



BD94122F
Datasheet
LED Drivers for LCD Backlights
PFC Direct Current Resonance Type
White LED Driver for Large LCD
BD94122F
General Description
BD94122F is a current resonance type LED Driver, which
can connect to PFC directly. LED current is controlled by
driving output frequency. Because this IC can use half
bridge structure, it can reduce the number of external
components.
BD94122F has some protection functions against fault
conditions such as Over Voltage Protection(OVP), LED
Short Protection(LSP) and LED Open Protection
Detection(LOP).
Key Specifications
Power Supply Voltage Range:
Output Driving Frequency
(Minimum Frequency Setting):
Circuit Current:
Operating Temperature Range:
VCC: 9.0V to 18.0V
60kHz(RRT=68kΩ)
5.0mA(Typ)
-40°C to +85°C
Package
SOP18
W(Typ) x D(Typ) x H(Max)
11.20mm x 7.80mm x 2.01mm
Features
1 Channel Push Pull Control
Current Feedback by Driving Frequency Resolution
Timer Latch Circuit
Under Voltage Detection for IC’s Power Line (VCC
UVLO)
Output Over Voltage Protection
Driving Output Frequency (Minimum Frequency
Setting) Tolerance: ±5%
Error Signal Output from FAIL Pin
Control IC Power On and Off by STB Pin
Burst Control by External PWM
Analog Dimming by External DC
Pulse/DC Conversion Function for ADIM
Applications
TV, Computer Display, LCD Backlighting
Typical Application Circuit
PVIN
RN12
LED1P
LED2P
RVCC
CVCC
RSTB1
RSTB2
CSTB
LED2N
RIS1 LED1N
RIS
CIS
Product structure: Silicon monolithic integrated circuit
www.rohm.com
© 2018 ROHM Co., Ltd. All rights reserved.
TSZ22111 • 14 • 001
This product has no designed protection against radioactive rays
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TSZ02201-0T5T0B500040-1-2
23.Mar.2018 Rev.001



BD94122F
BD94122F
Contents
General Description ........................................................................................................................................................................1
Features..........................................................................................................................................................................................1
Applications ....................................................................................................................................................................................1
Key Specifications ..........................................................................................................................................................................1
Package..........................................................................................................................................................................................1
Typical Application Circuit ...............................................................................................................................................................1
Pin Configuration ............................................................................................................................................................................3
Pin Description................................................................................................................................................................................3
Block Diagram ................................................................................................................................................................................4
Pin Function Descriptions ...............................................................................................................................................................5
Detection Condition List of the Protection Functions ......................................................................................................................8
Operation List of the Protection Function........................................................................................................................................8
Absolute Maximum Ratings ............................................................................................................................................................9
Thermal Resistance........................................................................................................................................................................9
Recommended Operating Conditions ...........................................................................................................................................10
External Components Recommended Ranges.............................................................................................................................10
Electrical Characteristics............................................................................................................................................................... 11
Typical Performance Curves.........................................................................................................................................................13
Timing Chart .................................................................................................................................................................................14
Application Example .....................................................................................................................................................................18
I/O Equivalence Circuits................................................................................................................................................................19
Operational Notes.........................................................................................................................................................................20
Ordering Information.....................................................................................................................................................................22
Marking Diagram ..........................................................................................................................................................................22
Physical Dimension and Packing Information ...............................................................................................................................23
Revision History............................................................................................................................................................................24
www.rohm.com
© 2018 ROHM Co., Ltd. All rights reserved.
TSZ22111 • 15 • 001
2/24
TSZ02201-0T5T0B500040-1-2
23.Mar.2018 Rev.001





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