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SG5842A Datasheet(PDF) 7 Page - Fairchild Semiconductor |
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SG5842A Datasheet(HTML) 7 Page - Fairchild Semiconductor |
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7 / 15 page  © 2007 Fairchild Semiconductor Corporation www.fairchildsemi.com SG5842A/SG582JA • Rev. 1.4.3 7 Electrical Characteristics (Continued) VDD= 15V and TJ=TA= -40~125°C, unless otherwise noted. Figure 5. VFB vs. PWM Frequency Symbol Parameter Conditions Min. Typ. Max. Units Current Sense Section ZSENSE Input Impedance 12 KΩ VSTHFL Current Limit Flatten Threshold Voltage 0.85 0.90 0.95 V VSTHVA Current Limit Valley Threshold Voltage VSTHFL–VSTHVA 0.22 V DCYSAW Duty Cycle of SAW Limit Maximum Duty Cycle 45 % tPD Propagation Delay to GATE Output RI=26KΩ 150 200 ns tLEB Leading-Edge Blanking Time RI=26KΩ 200 270 350 ns GATE Section DCYMAX Maximum Duty Cycle 60 65 70 % VGATE-L Output Voltage Low VDD=15V, IO=50mA 1.5 V VGATE-H Output Voltage High VDD=12.5V, IO=-50mA 7.5 V tr Rising Time VDD=15V, CL=1nF 150 250 350 ns tf Falling Time VDD=15V, CL=1nF 30 50 90 ns IO Peak Output Current VDD=15V, GATE=6V 230 mA VGATE- CLAMP Gate Output Clamping Voltage VDD=20V 18 19 V RT Section IRT Output Current of RT Pin RI=26KΩ 67 70 73 µA VRTTH Over-Temperature Protection Threshold Voltage 1.015 1.050 1.085 V tD-OTP Over-Temperature Debounce RI=26KΩ 60 100 140 µs |
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