MP3394

MP3394

NOT RECOMMENDED FOR NEW DESIGNS

4-Channel Boost WLED Controller

代替品

データシート

MP3394 continues to be in production for existing customers. Please consider this alternative for new designs:

MP3394S

5V～28Vin、4チャネル、200mA/チャネル、昇圧型白色LEDコントローラ

Features & Benefits

4ストリング、最大200mA/ストリングの白色LEDドライバ
5V〜28Vの入力電圧範囲
ストリング間で2.5%の電流整合精度
プログラム可能なスイッチング周波数
PWMまたはDC入力バーストPWM調光
開放および短絡LED保護
プログラム可能な過電圧保護
単一電源によるカスケード機能
低電圧誤動作防止機能
サーマルシャットダウン
TSSOP16EP、SOIC16パッケージ

… and many more!

概要

The MP3394 is a step-up controller with 4-channel current sources designed for driving the WLED arrays for large size LCD panel backlighting applications. The MP3394 is flexible for extending LED channels with two or more MP3394s in parallel while operating from a single inductor power source. The MP3394 uses current mode, fixed frequency architecture. The switching frequency is programmable by an external frequency setting resistor. It drives an external MOSFET to boost up the output voltage from a 5V to 28V input supply. The MP3394 regulates the current in each LED string to the programmed value set by an external current setting resistor. The MP3394 applies 4 internal current sources for current balance and the current matching can achieve 2.5% regulation accuracy between strings. Its low 350mV regulation voltage on LED current sources reduces power loss and improves efficiency. PWM dimming is implemented with external PWM input signal or DC input signal. The dimming PWM signal can be generated internally and the dimming frequency is programmed by an external setting capacitor.