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BM2P121XH-Z ๋ฐ์ดํ„ฐ์‹œํŠธ(HTML) 3 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) 3 Page - Rohm

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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
Description of Blocks
1
Back Converter
This is the IC for exclusive use of non-isolated type back converter.
Basic operation of back converter is shown below.
1.1
When the Switching MOSFET is ON
Current IL flows to coil L and energy is stored when the MOSFET turns ON. At this moment, the GND_IC pin
voltage becomes near the DRAIN pin voltage, and the diode D1 is OFF.
???????? =
(?????????????????????????????)
????
ื ????????????
Where:
????????
is the current flowing to the coil.
????????????
is the voltage applied to the DRAIN pin.
???????????????? is the output voltage.
????
is the value of coil.
????????????
is the term that the MOSFET is on.
Figure 1. Back Converter Operation (MOSFET = ON)
IL
GND
VOUT
AC
Input
Filter
DRAIN
VCC
GND_IC
DRAIN
ON
5
6
7
2
1
3
4
Current
[A]


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