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MCP16311/2 bảng dữ liệu(PDF) 17 Page - Microchip Technology

tên linh kiện MCP16311/2
Giải thích chi tiết về linh kiện  30V Input, 1A Output, High-Efficiency, Integrated Synchronous Switch Step-Down Regulator
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nhà sản xuất  MICROCHIP [Microchip Technology]
Trang chủ  http://www.microchip.com
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MCP16311/2 bảng dữ liệu(HTML) 17 Page - Microchip Technology

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 2013-2019 Microchip Technology Inc.
DS20005255C-page 17
MCP16311/2
4.2.5
HIGH-SIDE DRIVE
The MCP16311/2 features an integrated high-side
N-Channel MOSFET for high-efficiency step-down
power conversion. An N-Channel MOSFET is used for
its low resistance and size (instead of a P-Channel
MOSFET). The N-Channel MOSFET gate must be
driven above its source to fully turn on the device,
resulting in a gate-drive voltage above the input to turn
on the high-side N-Channel. The high-side N-channel
source is connected to the inductor and boost cap or
switch node. When the high-side switch is off and the
low-side switch is on, the inductor current flows through
the low-side switch, providing a path to recharge the
boost cap from the boost voltage source. The voltage
for the boost cap is supplied from the internal regulator
(VCC). An internal boost blocking diode is used to
prevent current flow from the boost cap back into the
regulator during the internal switch-on time.



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