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UPD166020T1F Datasheet(PDF) 9 Page - Renesas Technology Corp |
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UPD166020T1F Datasheet(HTML) 9 Page - Renesas Technology Corp |
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9 / 25 page  μPD166020T1F Chapter Title R07DS0441EJ0100 Rev.1.00 Page 9 of 23 Aug 15, 2011 3.6.2 Short Circuit Protection Case 1:IIN pin is shorted to ground in an overload condition, which includes a short circuit condition. The device shuts down automatically when either or both of following conditions (a, b) is detected. The sense current is fixed at IIS,fault. Shutdown is latched until the next reset via input. (a) IL > IL(SC) (b) Von > Von(OvL) after td(OC) Case 1-(a) IL > IL(SC) 0 t Short circuit detection Depending on the external impedance (Evaluation circuit) IN OUT IS : Cable impedance tsdelay(fault): Fault sense signal delay after short circuit detection IL(SC): Short circuit detection current 0 IIN IIN IIS IL IL IL(SC) VCC VCC VBAT VIN VIS VOUT VON VOUT/VCC VBAT 0 0 IIS IIS,fault tsdelay(fault) RIS RL VOUT Von Typical Short circuit detection current characteristics The short circuit detection current changes according VCC voltage and Von voltage for the purpose of to be strength of the robustness under short circuit condition. 0 20 40 60 80 100 120 140 160 0 5 10 15 20 VCC − VIN = 18 V 12 V 6 V Von - Output Voltage - V 0 30 60 90 120 150 510 15 20 Von = 3 V 6 V 12 V VCC − VIN - V |
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Similar Description - UPD166020T1F |
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