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BD9DA00MF 데이터시트(PDF) 24 Page - Rohm

부품명 BD9DA00MF
상세설명  4 V to 16 V Input, 12 A Integrated MOSFET Single Synchronous Buck DC/DC Converter
PDF  53 Pages
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제조업체  ROHM [Rohm]
홈페이지  http://www.rohm.com
Logo ROHM - Rohm

BD9DA00MF 데이터시트(HTML) 24 Page - Rohm

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BD9DA00MF
Datasheet
TSZ02201-0J2J0AB01940-1-2
© 2025 ROHM Co., Ltd. All rights reserved.
18.Mar.2025 Rev.001
www.rohm.com
TSZ22111 • 15 • 001
Function Explanations – continued
2. Protection
(1) Over Current Protection (OCP) / Short Circuit Protection (SCP)
Over Current Protection (OCP) restricts the flowing current through the Low-Side FET and the High-Side FET for every
switching period. When the Low-Side FET is on, the Low-Side FET remains on while the inductor current is more than
the Low-Side OCP setting value ILOCP. When the inductor current becomes ILOCP or less, the device can turn on the
High-Side FET. For ILOCP settings, refer to the Selection of Components Externally Connected 7. OCP Setting Resister.
When the inductor current becomes the High-Side OCP IHOCP = 17.5 A (Typ) or more while the High-Side FET is on,
the High-Side FET is turned off. Output voltage may decrease by changing frequency and duty due to the OCP
operation.
Short Circuit Protection (SCP) function is a Hiccup mode. After 3 ms (Typ) from the beginning of soft start, and after
SS/REF voltage (VSSREF) reaches 0.6 V (Typ), if VFB is 80 % (Typ) of FB reference voltage VREF or less, or over current
protection is detected for 31 consecutive cycles, the device shuts down for 117 ms (Typ), and then the device restarts.
Do not exceed the maximum junction temperature (Tjmax = 125 °C) during OCP and SCP operation.
VOUT
VFB
Low Side FET
Internal Gate Signal
Inductor Current
Low Side OCP
Internal Signal
SCP
Internal Signal
117 ms (Typ)
IHOCP
High Side OCP
Internal Signal
Less than
OCP 31 counts
VPGD
VREF x / 80 % (Typ)
VREF x 92.5 % (Typ)
ILOCP
OCP 31 counts
High Side FET
Internal Gate Signal
VSW
117 ms (Typ)
Less than
OCP 31 counts
Figure 43. OCP and SCP Timing Chart



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