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BM2P121XH-Z ๋ฐ์ดํ„ฐ์‹œํŠธ(HTML) 12 Page - Rohm

๋ถ€ํ’ˆ๋ช… BM2P121XH-Z
์ƒ์„ธ๋‚ด์šฉ  Non-isolated Type PWM DC/DC Converter IC Built-in Switching MOSFET
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BM2P121XH-Z ๋ฐ์ดํ„ฐ์‹œํŠธ(HTML) 12 Page - Rohm

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12/27
BM2P121XH-Z
TSZ02201-0F1F0A200560-1-2
17.Jan.2019 Rev.001
ฉ 2018 ROHM Co., Ltd. All rights reserved.
www.rohm.com
TSZ22111
? 15 ? 001
6
DC/DC Driver
? continued
6.6
Soft Start Function
At startup, this function controls the over current detection current in order to prevent any excessive voltage or
current rising. The details are shown in Figure 13. The IC enables the soft start operation by changing the over
current detection current with time.
Figure 13. Soft Start Function
7
FB OLP (Overload Protection)
FB OLP monitors load status and stops the switching operation at an overload status. In the overload condition, the
output voltage drops. Therefore, the function judges the status as an overload and the switching operation stops, when
the status that the electric power remains at the value set in the internal IC or more lasts for tFOLP1. The recovery after
the detection of FB OLP is tFOLP2 later.
8
TSD (Thermal Shutdown)
TSD stops the switching operation if the IC
?s temperature becomes TSD1 or more.
Time [ms]
Coil Current [A]
tSS1
IDPEAK1
IDPEAK2
IDPEAK3
IDPEAK
IPEAK1
IPEAK2
IPEAK3
IPEAK
SS1
SS2
SS3
tSS2
tSS3


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