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MCP1641X 데이터시트(PDF) 30 Page - Microchip Technology

부품명 MCP1641X
상세설명  Low IQ Boost Converter with Programmable Low Battery, UVLO and Automatic Input-to-Output Bypass Operation
PDF  44 Pages
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제조업체  MICROCHIP [Microchip Technology]
홈페이지  http://www.microchip.com
Logo MICROCHIP - Microchip Technology

MCP1641X 데이터시트(HTML) 30 Page - Microchip Technology

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MCP1641X
DS20006394D-page 30
 2020-2021 Microchip Technology Inc. and its subsidiaries
FIGURE 7-3:
Dynamic LBO Threshold to Help Optimize Li-Ion Battery Life.
VOUT
5V
VIN
GND
VFB
SW
CIN
10 µF
L1
4.7 µH
VOUT
+
–
1.5 M
360 k
EN
39.2 k
UVLO
PGT
1M
LBO
NMOS
COUT
10 µF
PGT
1.5 M
226 k
RH
RH1
RL
ENABLE
1M
LOW BATTERY (2.8V)
UVLO START = 3.3V
LBO = 2.8V
Note:
RH and RL set the UVLOSTART to 3.3V. For battery voltage higher than 3.3V, the switching is enabled and
the device regulates to 5V. After start-up, the PGT signal turns on the NMOS switch and puts in parallel
RH and RH1, and UVLOSTART changes to 2.8V. As a result, when the battery gets discharged to 2.8V, the
LBO switches to a low level to indicate the low battery warning.
V
IN
V
IN
1V/div
V
OUT
2V/div
LBO Signal
2V/div
1s/div
I
= 10 mA



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