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SG6846BLSY Datasheet(PDF) 6 Page - Fairchild Semiconductor |
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SG6846BLSY Datasheet(HTML) 6 Page - Fairchild Semiconductor |
6 / 15 page © 2008 Fairchild Semiconductor Corporation www.fairchildsemi.com SG6846B • Rev. 1.3.3 6 Electrical Characteristics VDD = 15V and TA = 25°C unless otherwise noted. Symbol Parameter Test Condition Min. Typ. Max. Unit VDD Section VDD-OP Continuously Operating Voltage 20 V VDD-ON Turn-on Threshold Voltage 15.5 16.5 17.5 V VDD-OFF Turn-off Voltage 9.5 10.5 11.5 V VDD-SCP Threshold Voltage on VDD for Short-Circuit Protection VDD-OFF +0.5V VDD-OFF +1.0V VDD-OFF +1.5V V VDD-LH Threshold Voltage for Latch-off Release 3 4 5 V IDD-ST Startup Current VDD-ON – 0.16V 8 30 µA IDD-OP Operating Supply Current GATE Open 3.7 5.0 mA VDD-OVP VDD Over-Voltage Protection (Latch off) 23 24 25 V tD-VDDOVP VDD OVP Debounce Time RI = 26kΩ 150 µs IDD-OVP VDD OVP Latch-off Holding Current VDD = 5V 30 50 70 µA VIN Section VIN-OFF PWM Turn-off Threshold Voltage 0.65 0.70 0.75 V VIN-ON PWM Turn-on Threshold Voltage VIN-OFF +0.18 VIN-OFF +0.20 VIN-OFF +0.22 V Feedback Input Section AV Input-Voltage to Current-Sense Attenuation 1/3.5 1/4.0 1/4.5 V/V ZFB Input Impedance 4.0 5.5 7.0 kΩ VFBO FB Pin Open Voltage 5.2 6.2 6.6 V Current Sense Section ZSENSE Input Impedance 12 kΩ tPD Delay to Output 100 250 ns tLEB Leading-edge Blanking Time 270 360 ns VSLOPE Slope Compensation Duty = DCYMAX 0.30 0.33 0.36 V VSTH1V Threshold Voltage for Current Limit VIN = 1V 0.80 0.83 0.86 V VSTH3V Threshold Voltage for Current Limit VIN = 3V 0.67 0.70 0.73 V VSTH1V-2/3 OCP Threshold Voltage for Current Limit VIN = 1V 0.58 0.61 0.64 V VSTH3V-2/3 OCP Threshold Voltage for Current Limit VIN = 3V 0.48 0.51 0.54 V tD-OCP Delay Time for Over-Current Protection RI = 26kΩ 175 200 225 ms tD-Short Output Short Circuit Protection delay time VCS > VSTH, RI = 26kΩ, VDD < VDD-SCP 6 7 8 ms tSS-65KHz RI = 26kΩ 4.5 5.0 5.5 ms tSS-130KHz Period During Soft Start Time RI = 13kΩ 2.25 2.50 2.75 ms Continued on following page… |
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