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FAN6863LTY Datasheet(PDF) 1 Page - Fairchild Semiconductor |
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FAN6863LTY Datasheet(HTML) 1 Page - Fairchild Semiconductor |
1 / 16 page May 2011 © 2011 Fairchild Semiconductor Corporation www.fairchildsemi.com FAN6863 • Rev. 1.0.1 FAN6863 Highly Integrated Green-Mode PWM Controller Features Low Standby Power: Under 0.1W Low Startup Current: 8µA Low Operating Current at 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 (FAN6863L) 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, FAN6863 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 FAN6863 is designed for SMPS and integrates a frequency-hopping function that helps reduce EMI emission of a power supply with minimum line filters. The built-in synchronized slope compensation provides proprietary sawtooth compensation for constant output power limit over universal AC input range. 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 shown in Table 1. Table 1. Protection Type Part Number OVP OLP OTP / OTP2 SSCP FAN6863 Latch A/R Latch A/R FAN6863L Latch Latch Latch A/R FAN6863R A/R A/R A/R A/R Ordering Information Part Number Operating Temperature Range Package Packing Method FAN6863TY -40 to +105°C 6-Lead, SuperSOT™-6, JEDEC M0-193, 1.6mm Wide Tape & Reel FAN6863LTY FAN6863RTY |
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