●A highly integrated PWM controller, FAN6602R 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 Under-Voltage Lockout (UVLO) lower limit. Green Mode enables power supplies to meet international power conservation requirements.The FAN6602R 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 13.5 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.
●Features
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● Low Startup Current: 8 µA
● Low Standby Power: Under 0.1 W
● Low Operating Current in Green Mode: 600 µA
● PWM Frequency Continuously Decreasing with Cycle Skipping and Burst Mode at Light Loads
● Fixed PWM Frequency (65 kHz) with Frequency Hopping
● Full Range Frequency Hopping
● Peak-Current Mode Operation with Cycle-by-Cycle Current Limiting
● Constant Output Power Limit (Full AC Input Range)
● VDD Over-Voltage Protection (OVP)
● Feedback Open-Loop Protection: 60 ms Delay
● Internal OTP Sensor with Hysteresis
● Gate Output Maximum Voltage Clamp: 13.5 V
● Gate Driving Capability: 400 mA
● Soft-Start Time: 6 ms
● Soft Driving for EMI Improvement
