Description
Setting oscillation frequency Input to PWM parator Input to overcurrent limiting function Ground Output for direct driving a power MOSFET Power supply for IC (5V) Reference voltage Reference voltage output Soft-start and ON/OFF control Soft-start, ON/OFF and latchmode shutdown operations s Item Supply voltage Output peak current FB pin input voltage REF pin output current IS pin input voltage CS pin input current Total power dissipation Operating temperature Junction temperature Storage temperature Note: Symbol VCC1 VCC2 IOL IOH VFB IREF VIS ICS Pd Topr Tj Tstg Test condition Low impedance source (Icc >15mA) Internal ZD clamp (Icc < 15mA) Sink current Source current at Ta =25˚C DIP SOP Rating 30 Self limiting +1.0 • 0.5 • 0.3 to 5.0 • 10 • 0.3 to 5.0 2.0 800 • 1 400 • 2 • 30 to +85 125 • 40 to +150 Unit V V A A V mA V mA mW ˚C ˚C ˚C • 1 Derating factor Ta > 25˚C: 8.0mW/˚C • 2 Derating factor Ta > 25˚C: 4.0mW/˚C Maximum power dissipation curve 400mW (SOP) 800mW (DIP) Max power disspation 0 • 30 25 85 125 Ambient temperature Ta [˚C] 59 FA3641P(N), FA3647P(N) s Remended operating condition Item Supply voltage REF pin bypass capacitor Soft-start capacitor Oscillation frequency (FB >1.2V) Min.oscillation frequency at light load mode (FB <1.2V) Symbol VCC Cref CS fOSC fOSCL Min.
