FSBH0F170A Datasheet | Fairchild Semiconductor

FSBH0F70A, FSBH0170/A, FSBH0270/A, FSBH0370 - Green Mode Fairchild Power Switch (FPS™) September 2009 FSBH0F70A, FSBH0170/A, FSBH0270/A, FSBH0370 Green Mode Fairchild Power Switch (FPS™) Features - Brownout Protection with Hysteresis - Built-In 5ms Soft-Start Function - Internal Avalanche-Rugged 700V Sense FET - No Acoustic Noise During Light-Load Operation - High-Voltage Startup - Linearly Decreasing PWM Frequency to 18KHz - Peak-Current-Mode Control - Cycle-by-Cycle Current Limiting - Leading-Edge Blanking (LEB) - Synchronized Slope pensation - Internal Open-Loop Protection - VDD Under-Voltage Lockout (UVLO) - VDD Over-Voltage Protection (OVP) - Internal Auto-Restart Circuit (OVP, OTP) .. - Constant Power Limit (Full AC Input Range) - Internal OTP Sensor with Hysteresis - VIN Pin for Pull-HIGH Latch Function and Pull LOW Auto-Recovery Protection Description The highly integrated FSBH-series consists of an integrated current-mode Pulse Width Modulator (PWM) and an avalanche-rugged 700V Sense FET. It is specifically designed for high-performance offline Switch Mode Power Supplies (SMPS) with minimal external ponents. The integrated PWM controller Features include a proprietary green-mode function that provides off-time modulation to linearly decrease the switching frequency at light-load conditions to minimize standby power consumption. To avoid acoustic-noise problems, the minimum PWM frequency is set above 18k Hz. This green-mode function enables the power supply to meet international power conservation requirements. The PWM controller is manufactured using the Bi CMOS process to further reduce power consumption. The FSBH-series turns off some internal circuits to improve power saving when VFB is lower than 1.6V, which allows an operating current of only 2.5m A. The FSBH-series has built-in synchronized slope pensation to achieve stable peak-current-mode control. The proprietary external line pensation ensures constant output power...