供应LED驱动器芯片MP3398AGF-Z

供应LED驱动器芯片MP3398AGF-Z：
LED照明驱动器 4-Ch Boost WLED Controller

5V-28Vin，4通道，350mA / 每通道的 白光LED升压控制器，具有独立的PDIM和ADIM引
是指驱动LED发光或LED模块组件正常工作的电源调整电子器件。由于LED PN结的导通特性决定，它能适应的电源的电压和电流变动范围十分狭窄，稍许偏离就可能无法点亮LED或者发光效率严重降低，或者缩短使用寿命甚至烧毁芯片。现行的工频电源和常见的电池电源均不适合直接供给LED，LED驱动器就是这种可以驱使LED在电压或电流状态下工作的电子组件。
The MP3398A 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 MP3398A uses peak-current mode with fixed switching frequency. The frequency is programmable by an external setting resistor. The MP3398A 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 MP3398A 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.
MP3398AGF-Z? 4-String, Max 350mA/String WLED Driver ? 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, TSSOP16-EP and SOIC20 Packages
MP3398AGF-Z

MP3398AGF-Z