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BD9423EFV Datasheet(PDF) 1 Page - Rohm |
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BD9423EFV Datasheet(HTML) 1 Page - Rohm |
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1 / 61 page  〇Product structure : Silicon monolithic integrated circuit 〇This product has no designed protection against radioactive rays . 1/57 TSZ02201-0F2F0C100080-1-2 © 2014 ROHM Co., Ltd. All rights reserved. 9.Oct.2015 Rev.001 TSZ22111 • 14 • 001 www.rohm.com LED Drivers for LCD Backlights 6ch boost LED driver which constant setting can be shared by I2C control BD9423EFV 1.1 General Description BD9423EFV is a high efficiency driver for white LEDs and designed for large LCD panel. This IC is built-in high current drive and high responsibility type 6ch LED drivers and 1ch boost DCDC converter. BD9423EFV has some protect function against fault conditions, such as the over-voltage protection (OVP), LED OPEN and SHORT protection, the over current limit protection of DCDC (OCP). Therefore BD9423EFV is available for the fail-safe design over a wide range output voltage. Moreover the functions and the detection voltage can be controlled by the I2C. This enables for the constant setting of external parts to be shared by I2C control, nevertheless the different usage condition. Features Operating power supply voltage range:9.0V to 35.0V Oscillator frequency: 200kHz (RT=100kΩ) Operating Current: 9mA (typ.) Operating temperature range: -40°C to +85°C Applications TV, Computer Display, Notebook, LCD Backlighting Key Specifications LED drivers Max curret 400mA per channel Constant current accuracy ±1.8% (IC only) Current analog (linear) dimming by ADIM pin Several protection functions DCDC part : OCP/OVP/UVLO LED driver part :OPEN,SHORT detection SHORT detection voltage is set by LSP pin Error detection output by FAIL pin Master/Slave mode inside 1.2 Package W(Typ) x D(Typ) x H(Max) HTSSOP-B40: 13.60mm x 7.80mm x 1.00mm Pin Pitch: 0.65mm Figure 1. HTSSOP-B40 Typical Application Circuit Figure 2. Typical application circuit Datasheet |
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