Microchip公司的MCP1633高速PWM控制器是電源應用的脈寬調製器,它是基於MCP1632 PWM控制器,但包含了PWM LED調光的特別區塊.特別適用於需要低邊MOSFET的拓撲如升壓,反激,SEPIC,CUK等.MCP1633採用電流模式控制,具有優異的帶寬和瞬態響應,以及逐個週期的限流和可調峰值失調.如果需要, MCP1633還可工作在電壓模式控制.開關頻率可通過外接電阻在200 kHz和2.2 MHz之間設定.輸入電壓3V 到 5.5V,具有欠壓保護,輸出過壓保護,輸出短路保護和超溫保護.主要用在LED驅動器,開關電源(SMPS)和磚形DC/DC轉換器.中電網為您整理如下詳細資料,本文介紹了MCP1633主要特性,功能框圖,多種應用電路以及MCP1633 SEPIC LED驅動器演示板主要特性和技術指標,框圖和測試建立圖,電路圖,材料清單和PCB設計圖.
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 frequencyof 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.
The MCP1633 integrates a cu..
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