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MCP73837AMIMF 数据表(PDF) 14 Page - Microchip Technology

部件名 MCP73837AMIMF
功能描述  Advanced Stand-Alone Li-Ion / Li-Polymer Battery Charge Management Controller with Autonomous AC-Adapter or USB-Port Source Selection
PDF  30 Pages
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制造商  MICROCHIP [Microchip Technology]
网页  http://www.microchip.com
标志 MICROCHIP - Microchip Technology

MCP73837AMIMF 数据表(HTML) 14 Page - Microchip Technology

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MCP73837/8
DS22071A-page 14
© 2007 Microchip Technology Inc.
3.8
USB-Port Current Regulation Set
(PROG2)
The MCP73837/8 USB-Port current regulation set
input (PROG2) is a digital input selection. A logic Low
selects a 1 unit load charge current; a logic High selects
a 5 unit loads charge current.
PROG2 also functions as the set point of precondition
and termination when USB-Port is present. When
PROG2 is floating, the MCP73837/8 enters in stand-by
mode.
3.9
Power Good (PG)
Power Good (PG) is available only on MCP73837. PG
is an open-drain logic output for connection to a LED
for input power supply indication. Alternatively, a pull-
up resistor can be applied for interfacing to a host
microcontroller.
3.10
Timer Enable (TE)
Timer Enable (TE) is available only on MCP73838.
(TE) enables the built-in safety timer when pull low and
disables the built-in safety timer when pull high.
Note:
The built-in safety timer is available for both
MCP73837 and MCP73838 in the following
options: Disable, 4 HR, 6 HR, and 8 HR.
3.11
Battery Temperature Monitor
(THERM)
MCP73837/8 continuously monitors the battery
temperature during a charge cycle by measuring the
voltage between the THERM and VSS pins. An internal
50 µA current source provides the bias for the most
common
10 k
Ω negative-temperature coefficient
thermistors (NTC).



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