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PIP3224-DC Datasheet(PDF) 4 Page - NXP Semiconductors |
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PIP3224-DC Datasheet(HTML) 4 Page - NXP Semiconductors |
4 / 16 page Philips Semiconductors PIP3224-DC Dual channel high-side TOPFET™ Product data Rev. 01 — 20 February 2004 4 of 16 9397 750 12362 © Koninklijke Philips Electronics N.V. 2004. All rights reserved. 5. Functional description A diagnostic status ensures faster fault detection. Active current limit is combined with latched short circuit protection in order to protect the device in the event of a short circuit. Thermal shutdown for high temperature conditions has an automatic restart at a lower temperature so providing protection against excessive power dissipation. Active clamping protects the device against low energy spikes. Undervoltage lockout means the device shuts down for low battery voltages, thus avoiding faulty operation. Overvoltage shutdown in the on-state protects a load such as a lamp filament from potentially destructive voltage spikes. [1] The status will continue to indicate OT (even if the input goes LOW) until the device cools below the reset threshold temperature. See “Overtemperature protection” characteristics in Table 7 “Static characteristics”. Table 4: Truth table Abbreviations: L = logic LOW; H = logic HIGH; X = don’t care; 0 = condition not present; 1 = condition present; UV = undervoltage; OV = overvoltage; OC = open circuit load; SC = short circuit; OT = overtemperature [1]. Input Supply Load 1 Load 2 Load output Status Operating mode 1 2 UV OV OC SC OT OC SC OT 1 2 L L 0 X 0 X X 0 X X OFF OFF H both off & normal L L 0 X 1 XXXXX OFF OFF L both off, one/both OC or shorted to VS or battery; Figure 10 L H 0 X 1 X X 0 0 0 OFF ON L one off & OC, with other on & normal H L00000000 ON OFF H one on & normal, with other off & normal H H 00000000 ON ON H both on & normal H X 1 0 X X X 0 X X OFF OFF H supply undervoltage lockout H X 0 1 X 0 0 X 0 0 OFF OFF H supply overvoltage shutdown H X 0001 XXXX OFF X L one SC tripped H L0001 X 0 0 X OFF OFF L one SC tripped, with other off & normal H H 0001 X 000 OFF ON L one SC tripped, with other on & normal H X 00001 X X X OFF X L one OT shutdown H L0000100 X OFF OFF L one OT shutdown, with other off & normal H H 00001000 OFF ON L one OT shutdown, with other on & normal |
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