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FAN6863WTY Datasheet(PDF) 1 Page - Fairchild Semiconductor |
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FAN6863WTY Datasheet(HTML) 1 Page - Fairchild Semiconductor |
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1 / 16 page  May 2012 © 2011 Fairchild Semiconductor Corporation www.fairchildsemi.com FAN6863W • Rev. 1.0.1 FAN6863W Highly Integrated Green-Mode PWM Controller Features Low Standby Power: Under 0.1W Low Startup Current: 8µA Low Operating Current in Green Mode: 600µA Peak-Current Mode Operation with Cycle-by-Cycle Current Limiting PWM Frequency Continuously Decreasing with Burst Mode at Light Loads VDD Over-Voltage Protection (OVP) Constant Output Power Limit (Full AC Input Range) Internal Latch Circuit (FAN6863WL) for OVP, OTP SENSE Pin Short-Circuit Protection (SSCP) Fixed PWM Frequency (65KHz) with Frequency Hopping Feedback Open-Loop Protection: 60ms Delay GATE Output Maximum Voltage Clamp: 13.5V Soft-Start Time: 5ms Soft Driving for EMI Improvement Full Range Frequency Hopping Internal OTP Sensor with Hysteresis Gate Driving Capability: 400mA Applications General-purpose switched-mode power supplies and flyback power converters, including: Power Adapters Open-Frame SMPS SMPS with Surge-Current Output, such as for Printers, Scanners, Motor Drivers Description A highly integrated PWM controller, FAN6863W provides several features to enhance the performance of flyback converters. To minimize standby power consumption, a proprietary Green Mode provides off- time modulation to continuously decrease the switching frequency under light-load conditions. Under zero-load conditions, the power supply enters Burst Mode, which completely shuts off PWM output. Output restarts just before the supply voltage drops below the UVLO lower limit. Green Mode enables power supplies to meet international power conservation requirements. The FAN6863W is designed for SMPS and integrates a frequency-hopping function that helps to reduce EMI emission of a power supply with minimum line filters. To compensate the power limit variation over universal input range, a current limit (VLIMIT) adaptively keeps the power limit substantially constant. The gate output is clamped at 13.5V to protect the external MOSFET from over-voltage damage. Other protection functions include SENSE pin Short- Circuit Protection (SSCP), VDD Over-Voltage Protection (OVP), and Over-Temperature Protection (OTP). For OTP, an external NTC thermistor can be applied to sense the ambient temperature. When VDD OVP or OTP is activated, an internal latch circuit latches off the controller. Protection types are shown in Table 1. Table 1. Protection Type Part Number OVP OLP OTP / OTP2 SSCP FAN6863W Latch A/R Latch A/R FAN6863WL Latch Latch Latch A/R FAN6863WR A/R A/R A/R A/R Ordering Information Part Number Operating Temperature Range Package Packing Method FAN6863WTY -40 to +105°C 6-Lead, SuperSOT™-6, JEDEC M0-193, 1.6mm Wide Tape & Reel FAN6863WLTY FAN6863WRTY |
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