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产品信息
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