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MCP73811 bảng dữ liệu(PDF) 9 Page - Microchip Technology

tên linh kiện MCP73811
Giải thích chi tiết về linh kiện  Simple, Miniature Single-Cell, Fully Integrated Li-Ion / Li-Polymer Charge Management Controllers
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© 2007 Microchip Technology Inc.
DS22036A-page 9
MCP73811/2
3.0
PIN DESCRIPTION
The descriptions of the pins are listed in Table 3-1.
TABLE 3-1:
PIN FUNCTION TABLES
3.1
Charge Enable Input (CE)
A logic High enables battery charging. A logic Low
disables battery charging. The charge enable input is
compatible with 1.8V logic.
3.2
Battery Management 0V Reference
(VSS)
Connect to negative terminal of battery and input
supply.
3.3
Battery Charge Control Output
(VBAT)
Connect to positive terminal of battery. Drain terminal
of internal P-channel MOSFET pass transistor. Bypass
to VSS with a minimum of 1 µF to ensure loop stability
when the battery is disconnected.
3.4
Battery Management Input Supply
(VDD)
A supply voltage of [VREG (typ.) + 0.3V] to 6V is
recommended. Bypass to VSS with a minimum of 1 µF.
3.5
Current Regulation Set (PROG)
For the MCP73811, the current regulation set input
(PROG) functions as a digital input selection. A logic
Low selects a 85 mA charge current; a logic High
selects a 450 mA charge current.
For the MCP73812, the charge current is set by placing
a resistor from PROG to VSS.
Pin Number
Symbol
Function
SOT-23-5
1
CE
Active High Charge Enable
2VSS
Battery Management 0V Reference
3VBAT
Battery Charge Control Output
4VDD
Battery Management Input Supply
5
PROG
Current Regulation Set and Charge Control Enable


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