Microchip MCP1633 SEPIC LED驱动器解决方案
Microchip公司的MCP1633高速PWM控制器是电源应用的脉宽调制器,它是基于MCP1632 PWM控制器,但包含了PWM LED调光的特别区块.特别适用于需要低边MOSFET的拓扑如升压,反激,SEPIC,CUK等.MCP1633采用电流模式控制,具有优异的带宽和瞬态响应,以及逐个周期的限流和可调峰值失调.如果需要, MCP1633还可工作在电压模式控制.开关频率可通过外接电阻在200 kHz和2.2 MHz之间设定.输入电压3V 到 5.5V,具有欠压保护,输出过压保护,输出短路保护和超温保护.主要用在LED驱动器,开关电源(SMPS)和砖形DC/DC转换器.中电网为您整理如下详细资料,本文介绍了MCP1633主要特性,功能框图,多种应用电路以及MCP1633 SEPIC LED驱动器演示板主要特性和技术指标,框图和测试建立图,电路图,材料清单和PCB设计图.
The MCP1633 High Speed PWM Controller is a pulsewidthmodulator developed for standalone powersupply applications. The MCP1633 design is based onthe MCP1632 PWM Controller but includes specificblocks for PWM LED dimming. It is suitable for use intopologies requiring a low side MOSFET, such asBoost, Flyback, SEPIC, CUK, etc.
The MCP1633 uses Current Mode Control to providesuperior bandwidth and transient response, and alsocycle-by-cycle current limiting with adjustable peakoffset. The MCP1633 is also capable of operating inVoltage Mode Control if required.
The switching frequency of the MCP1633 can be set byan external resistor between 200 kHz and 2.2 MHz.
The MCP1633 reference voltage is adjustable by usingonly one external resistor.
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