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BD9P1X5EFV-C 데이터시트(PDF) 8 Page - Rohm |
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BD9P1X5EFV-C 데이터시트(HTML) 8 Page - Rohm |
8 / 60 page 8/57 TSZ02201-0J1J0AL01480-1-2 © 2019 ROHM Co., Ltd. All rights reserved. 08.Apr.2020 Rev.002 www.rohm.com TSZ22111 • 15 • 001 BD9P1x5EFV-C Series Description of Blocks - continued - PWM Comp This block compares the output voltage of the GmAmp2 (Vc) and the saw tooth waveform (Vr) to control the switching duty. - Ramp This block generates the saw tooth waveform (Vr) from the clock signal generated by OSC. - Control Logic This block controls switching operation and protection functions. - Driver This circuit drives the gates of the output FETs. - Sleep Comp If output/feedback voltage becomes 101.3 % (Typ) or more, this block puts the device into SLEEP state. This state is released when output/feedback voltage becomes 101.0 % (Typ) or less. - ZX Comp This block stops the switching by detecting reverse current of the SW current at LLM control. - HOCP Comp This block detects the current flowing through the High Side FET and limits the current of 2.2 A (Min) or more. This function works in abnormal situation such as the SW pin shorted to GND condition in order to prevent the High Side FET from destruction. - Reset When the output voltage reaches -4.7 % (Typ) or more of the normal regulation voltage, the open drain MOSFET connected to the RESET pin turns off in 3.6 ms (Typ) and the output of the RESET pin becomes high by its external pull-up resistor. When the output voltage reaches -7.2 % (Typ) or less, the RESET pin open drain MOSFET turns on and the RESET pin is pulled down with an impedance of 190 Ω (Typ). - Discharge This block discharges the output voltage during EN is low and before VOUT start up. The VOUT_DIS pin is pulled down with an impedance of 75 Ω (Typ). |
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