BD9394EFV中文资料面向大屏幕的白色LED驱动器(DC/DC型)数据手册ROHM规格书

描述 Description

BD9394EFV是白色LED用高效率驱动器，适用于大屏幕液晶驱动器。此IC内置了可向光源（LED串联连接的阵列）提供适当电压的DCDC转换器。BD9394EFV中内置了应对异常状态的几种保护功能。过电压保护（OVP: over voltage protection）、过电流检测（OCP: over current limit protection of DCDC）、短路电路保护（SCP: short circuit protection）、开路保护（open detection of LED string）等。因此，可在更宽的输出电压条件及负载条件下使用。

特性 Features

•4ch LED constant current driver and DC/DC converter
•Maximum LED Current: 150mA
•LED Feedback Voltage: 0.37V (@NADIM=2.62V), so lower heat. Adjustable Feed Back Voltage by following LED Current setting.
•±2% LED current accuracy (NADIM=2.62V, when each LED is set to 100mA)
•Analog current (Linear) dimming at NADIM pin
•LED pin rating 60V
•Individual detection and individual LED OFF for both open and short circuits
•Built-in ISET pin short-circuit protection circuit
•Set Soft-Start time byexternal capacitor.
•FET’s Gate (N pin) is driven by 5.8V swing
•Built-in Vout discharge circuit for shutdown
•Built-in Vout overvoltage protection (OVP) / reduced voltage protection (SCP) circuit
•Adjustable LED Short Protection Voltage by LSP terminal
•HSOP20, HTSSOP-B24 package with high heat radiation efficiency

简介

BD9394EFV属于集成电路（IC）的LED驱动器。由制造生产的BD9394EFVLED 驱动器器件属于 LED 驱动器电源管理集成电路 (PMIC) 系列，可通过标称固定电压的电源为负载（通常为发光二极管）提供电流，并且电流可控。它与用于电压调节的类似产品的主要区别在于，这类器件提供较低的反馈电压（以提高系统能效），而且通常可对器件工作点进行外部控制，可在照明应用中用于实现调光功能。