MP3398L数据手册集成电路（IC）的LED驱动器规格书PDF

描述 Description

The MP3398L is a step-up controller with 4 current channels, which is designed to drive WLED arrays for large-size LCD-panel backlighting applications. It is flexible to expand the number of LED channels by two or more ICs in parallel sharing a single inductive power source. The MP3398L uses peak-current mode with fixed switching frequency. The frequency is programmable by an external setting resistor. The MP3398L drives an external MOSFET to boost up the output voltage from a 5V to 28V input supply. It regulates the current in each LED string to the value set by an external current-setting resistor. The MP3398L applies 4 internal current sources for current balance. The current matching can achieve 2.5% regulation accuracy between strings. Its low regulation voltage on LED current sources reduces power loss. The MP3398L can support both analog and PWM dimming independently to meet the different dimming-mode request. In addition, rich protection modes are also integrated including OCP, OTP, UVP, OVP, LED short/open protection, inductor/diode short protection. The MP3398L is available in SOIC16 package.

特性 Features

● 4-String, Max 350mA/String WLED Driver
● 4.5V to 28V Input Voltage Range
● 2.5% Current Matching Accuracy Between Strings
● Programmable Switching Frequency
● PWM and Analog Dimming Mode
● Cascading Capability with a Single Power Source
● LED Open and Short LED Protection
● Programmable Over-Voltage Protection
● Recoverable Thermal Shutdown Protection
● Over Current Protection
● Inductor/Diode short Protection
● Under-Voltage Lockout
● SOIC16 Package

简介

MP3398L属于集成电路（IC）的LED驱动器。由制造生产的MP3398LLED 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。