FAN302UL: Primary-Side-Regulation PWM Controller
Description: This highly integrated PWM controller provides sev...
This highly integrated PWM controller provides several features to enhance the performance of flyback converters. The constant-current-control, proprietary topology enables simplified designs without secondary feedback circuitry for battery-charger applications.
A proprietary Burst-Mode function with low operation current minimizes standby power consumption.
The FAN302UL controller also provides several protections. Cycle-by-cycle current limiting ensures the fixed peak current limit level, even if a short circuit occurs. The gate output is clamped at 15V to protect the power MOS from high gate-source voltage conditions. If either VS OVP or internal OTP is triggered, the circuit enters Latch Mode until AC power is removed.
Using FAN302UL, a charger can be implemented with few external components and minimized cost, compared to a conventional design or a linear transformer.
Ultra-Low Standby Power: Under 20mW at 264VAC
Constant-Current (CC) Control without Secondary-Feedback Circuitry
Fixed PWM Frequency at 140kHz with Frequency Hopping to Solve EMI Problems
Low Operating Current: 3.5mA
Peak-Current-Mode Control in CV Regulation
Cycle-by-Cycle Current Limiting
VDD Over-Voltage Protection (Auto-Restart)
VS Over-Voltage Protection (Latch Mode)
VDD Under-Voltage Lockout (UVLO)
Gate Output Maximum Voltage Clamped at 15V
Fixed Over-Temperature Protection (Latch Mode)
Available in an 8-Lead SOIC Package
Technical Documentation & Design Resources
Availability and Samples
Compliance: Pb-free Halide free
Description: Primary-Side-Regulation PWM Controller
Package Type: SOIC-8
Package Case Outline: 751EB
Container Type: REEL
Container Qty: 2500
Market Leadtime (weeks):4 to 8
VCC Min (V):
VCC Max (V):
fSW Typ (kHz):