CM6901数据手册Champion中文资料规格书

描述 Description

CM6901 is a SLS, SRC/LLC + SR resonant controller  and it can operate at both SRC and LLC region with synchronous rectification to achieve high efficiency. Its unique features: FM + 2 PWMING modes.  It is used for DC-DC conversion in offline application.  Light load regulation is accomplished by transitioning the controller from frequency modulation mode into PWM mode. To have the optimal balance performance between hold-up time and efficiency, its frequency range crosses fr1, resonant frequency.

 CM6901 system has a constant voltage feedback loop with precision 2.5V Vfb reference. The 1V ILIMIT can be latched when a standby converter is applied; otherwise, it is an auto-restart I limit.

特性 Features

Inrush Current Control Separated PFC OVP pin Separated Power VCC and Analog VCC Separated Power Ground and Analog Ground Additional folded-back current limit for PWM section. 23V Bi-CMOS process VIN OK guaranteed turn on PWM at 2.5V instead of 1.5V Internally synchronized leading edge PFC and trailing edge PWM in one IC Slew rate enhanced transconductance error amplifier for ultra-fast PFC response Low start-upcurrent (100μA typ.)Low operating current (3.0mA type.) Low total harmonic distortion, high PF Reduces ripple current in the storage capacitor between the PFC and PWM sections Average current, continuous or discontinuous boost leading edge PFC VCC OVP Comparator Low Power Detect Comparatoru PWM configurable for current mode or voltage mode operation Current fed gain modulator for improved noise immunity Brown-out control, over-voltage protection, UVLO, and soft start, and Reference OK

应用 Application

·DC-DC power supply.\r
·Operates in FM/PWM mode.