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FSDH321L Datasheet(PDF) 6 Page - Fairchild Semiconductor |
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FSDH321L Datasheet(HTML) 6 Page - Fairchild Semiconductor |
6 / 20 page FSDH321, FSDL321 6 Electrical Characteristics (Control Part) (Continued) (Ta=25 °C unless otherwise specified) Note: 1. These parameters, although guaranteed, are not 100% tested in production 2. These parameters, although guaranteed, are tested in EDS (wafer test) process 3. di/dt = 250mA/uS Parameter Symbol Condition Min. Typ. Max. Unit UVLO SECTION Start Threshold Voltage VSTART VFB=GND 11 12 13 V Stop Threshold Voltage VSTOP VFB=GND 789 V OSCILLATOR SECTION Initial Accuracy FOSC FSDH321 90 100 110 kHz Frequency Modulation FMOD ±2.5 ±3 ±3.5 Initial Accuracy FOSC FSDL321 45 50 55 kHz Frequency Modulation FMOD ±1.0 ±1.5 ±2.0 Frequency Change With Temperature (2) ∆F/∆T-25°C ≤ Ta ≤ +85°C- ±5 ±10 % Maximum Duty Cycle Dmax FSDH321 62 67 72 % FSDL321 71 77 83 % FEEDBACK SECTION Feedback Source Current IFB Ta=25 °C, Vfb = 0V 0.70 0.90 1.1 mA Shutdown Feedback Voltage VSD 5.5 6.0 6.5 V Shutdown Delay Current IDELAY Ta=25 °C, Vfb = 4V 3.5 5.0 6.5 µA BURST MODE SECTION Burst Mode Voltage VBURH Tj = 25 °C 0.4 0.5 0.6 V VBURL 0.25 0.35 0.45 V Hysteresis - 150 - mV CURRENT LIMIT(SELF-PROTECTION)SECTION Peak Current Limit(3) ILIM Tj = 25 °C 0.60 0.70 0.80 A Current Limit Delay(1) TCLD Tj = 25 °C - 600 - ns SOFT START SECTION Soft Start Time TSS Vfb = 4V 10 15 20 ms PROTECTION SECTION Thermal Shutdown Temperature (1) TSD - 125 145 - °C Over Voltage Protection VOVP 18 19 20 V TOTAL STANDBY CURRENT SECTION Startup Charging Current ICH VCC=0V 0.7 0.85 1.0 mA Operating Supply Current (Control Part Only) IOP VCC = 14V, Vfb = 0V 1 3 5 mA |
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