CR6842

CR6842 Green-Power PWM Controller with Freq. Jittering Features z z z www.DataSheet4U.com z z z z z z z z Low Cost, Green-Power Burst-Mode PWM Very Low Start-up Current ( about 7.5µA) Low Operating Current ( about 3.0mA) Current Mode Operation Under Voltage Lockout (UVLO) VDD Over Voltage Protection(OVP) programmable over-temperature protection Internal Latch Circuit(OTP,OVP) Built-in soft start with 1ms Built-in Frequency jitter for better EMI Signature Soft Clamped gate output voltage 16.5V z z z z z z z z z z VDD over voltage protect 25.5V Cycle-by-cycle current limiting Sense Fault Protection Output SCP (Short circuit Protection) Built-in Synchronized Slope Compensation Leading-edge blanking on Sense input Programmable PWM Frequency High-Voltage CMOS Process with ESD DIP-8 & SOP-8 Pb-Free Package Compatible with SG6842J&LD7552&OB2269 Applications z z Power Adaptor Battery Charger Adapter z z Open Frame Switching Power Supply LCD Monitor General Description The CR6842 is a low startup current , low cost, current mode PWM controller with Green-Power & burst-mode power-saving operation. The integrated functions such as the leading-edge blanking of the current sensing, internal slope compensation provide the users a high efficiency, low external component counts, and low cost solution for AC/DC power applications. The special Green-Power function provides off-time modulation to linearly decrease the switching frequency under light-load conditions. And under zero-load condi...