BD9483F – White LED Driver

BD9483F Datasheet PDF learn more.

Part number : BD9483F

Functions : This is a kind of semiconductor, White LED Driver.

Pin arrangement :

Package information :

Manufacturer : Rohm

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BD9483F Datasheet PDF

The texts in the PDF file :

Datasheet LED Drivers for LCD Backlights White LED Driver for large LCD Panels (DCDC Converter type) BD9483F,FV ●General

Description

BD9483F,FV is a high efficiency driver for white LEDs and designed for large LCDs. This IC is built-in 2ch boost DCDC converters that employ an array of LEDs as the light source. BD9483F,FV has some protect function against fault conditions, such as the over-voltage protection (OVP), the over current limit protection of DCDC (OCP), Max duty protection, LED OCP protection. Therefore BD9483F,FV is available for the fail-safe design over a wide range output voltage. ●Key Specification  Operating power supply voltage range:11.0V to 35.0V  Oscillator frequency: 150kHz (RT=100kΩ)  Operating Current: 3mA (typ.)  Operating temperature range: -40°C to +85°C ●Applications TV, Computer Display, Notebook, LCD Backlighting ●

Features

■ 2ch boost DCDC converter with current mode ■ LED protection circuit (Max duty protection, LED OCP protection) ■ Over-voltage protection (OVP) for the output ■ ■ ■ ■ voltage Vout Adjustable soft start The wide range of analog dimming 0.2V-3.0V 2ch independent PWM dimming input The UVLO detection for the input voltage of the power stage ■ FAIL logic output ●Package W(Typ.) D(Typ.) H(Max.) 15.00mm x 7.80mm x 2.01mm 1.27mm SOP-24: Pin Pitch: ●Typical Application Circuit VOUT2 VOUT1 VCC VIN VCC REG90 VREG STB REG90 UVLO VCC UVLO UVLO OVP UVLO TSD OVP Figure 2-1. SOP-24 REG90 Css SS SS SS-FB clamper Ccp CP FAILB ERROR amp MAXFB PWM1 PWM2 Each channel GATE2 CS2 ADIM 1/3 Figure 1. Typical Application Circuit ○Product structure:Silicon monolithic integrated circuit . www.rohm.com © 2012 ROHM Co., Ltd. All rights reserved. TSZ22111・14・001 + + – Fail detect + RT OSC PWM COMP GATE1 CONTROL LOGIC CS1 LEB Current compensation REG90 PGND1 DIMOUT1 SSOP-B24: Pin Pitch: W(Typ.) D(Typ.) H(Max.) 7.80mm x 7.60mm x 1.35mm 0.65mm LEDOCP ISENSE1 1.0V FB1 [ … ]

BD9483F PDF File



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