Microchip MCP19214(5)两路模拟PWM电源控制方案

Microchip公司的MCP19214/5是高度集成两路数字增强的PWM控制器,包括全可编微控制器核和10位模拟数字转换器(ADC);每个PWM通路包括两个误差放大器和单独可调基准电压发生器,电流检测输入,可编斜率补偿发生器,可编振荡器,电流差分放大器和MOSFET驱动器,输入电报压4.5V-42V,满足AEC Q100规范和PPAP功能,主要用在双向电源转换器,LED照明系统,电池充电器和其它低边开关PWM应用.本文介绍了MCP19214/5主要特性和框图,MCU核框图,应用框图以及MCP19215 双路升压/SEPIC评估板主要特性,电路图,材料清单和PCB设计图.
The MCP19214/5 devices are highly integrated,digitally enhanced PWM controllers, used for batterychargers, bidirectional converters, LED lightingsystems and other low-side switch PWM applications.
These devices feature two independent analog PWMcontrollers, and the internal architecture is optimizedfor applications that require precise control of theoutput parameters. Like the other members of thedigitally enhanced PWM controllers family,MCP19214/5 includes a fully programmablemicrocontroller core and a 10-bit analog-to-digitalconverter.
Each PWM channel includes two error amplifiers withindependent adjustable reference voltage generators,current sense input with programmable leading edgeblanking, programmable slope compensation rampgenerator, integrated internal programmable oscillator,current sense differential amplifier and an integratedMOSFET driver.
An internal LDO (+5V) is used to power the PIC core,the analog circuitry and to provide 5V externally. This5V external output can also be used to supply theinternal MOSFET drivers. The internal MOSFETdrivers have the option to be powered from an external voltage source (up to 10V) in order to accommodateapplications that require higher voltages for gatedriving.
The MCP19214/5 controllers offer a very high degreeof integration, allowing the user to develop complexapplications without additional circuitry. Some uniquefeatures, like simultaneous control of the converter’soutput current and voltage, make MCP19214/5 devices ideally s...