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THV6530 Datasheet(PDF) 9 Page - THine Electronics, Inc. |
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THV6530 Datasheet(HTML) 9 Page - THine Electronics, Inc. |
9 / 11 page ![]() THine Electronics, Inc. 9/11 Copyright© 2013 THine Electronics, Inc. All rights reserved. THL6530_Rev.1.00_E Soft start (SS) The boost converter carries the soft start function in order to prevent the rush current at a start-up. This function is to raise output voltage slowly. It is because overshooting and rush current occur when input voltage is inputted. The soft-start time of the boost controller is 7ms, and the soft-start time of positive and negative charge pump is 5ms. Over current protection (OCP) In order to restrict the over-current by the abnormalities of load, etc., the over-current protection circuit is built in. Over-current detection of pulse-by-pulse system is adopted. An output transistor is turned off if the current which flows into an output transistor reaches boost converter limit current (Ilim). An over-current protection circuit detects the peak current of an inductor. Input-and-output voltage and ripple current is taken into consideration. Thermal shut down (TSD) In order to prevent destruction by heat, the thermal shutdown circuit is built in. If the junction temperature Tj is 125oC or more, the thermal shutdown circuit will operate and it will stop switching operation. Moreover, the hysteresis of a thermal shutdown circuit is 15oC. If Tj falls, output voltage will return. |
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