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FAN6862WTY 데이터시트(PDF) 1 Page - Fairchild Semiconductor |
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FAN6862WTY 데이터시트(HTML) 1 Page - Fairchild Semiconductor |
1 / 16 page September 2012 © 2012 Fairchild Semiconductor Corporation www.fairchildsemi.com FAN6862W • Rev. 1.0.0 FAN6862W Highly Integrated Green-Mode PWM Controller Features Low Standby Power: Under 0.1 W Low Startup Current: 8 µA Low Operating Current in Green Mode: 600 µA 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 (FAN6862WL) for OVP, OTP Fixed PWM Frequency (65 KHz) with Frequency Hopping Feedback Open-Loop Protection: 60 ms Delay GATE Output Maximum Voltage Clamp: 13.5V Soft-Start Time: 5 ms Soft Driving for EMI Improvement Full Range Frequency Hopping Internal OTP Sensor with Hysteresis Gate Driving Capability: 400 mA 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, FAN6862W 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 FAN6862W 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 bias current limit (VLIMIT) adaptively keeps the power limit substantially constant. The gate output is clamped at 13.5 V to protect the external MOSFET from over-voltage damage. Other protection functions include 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 FAN6862W Latch A/R Latch FAN6862WL Latch Latch Latch FAN6862WR A/R A/R A/R Ordering Information Part Number Operating Temperature Range Package Packing Method FAN6862WTY -40 to +105°C 6-Lead, SOT23, JEDEC MO-178 Variation AB, 1.6 mm Wide Tape & Reel FAN6862WLTY FAN6862WRTY |
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