MCP73861 Datasheet

  • MCP73861

  • Advanced Single or Dual Cell, Fully Integrated Li-Ion /Li-Po...

  • 773.90KB

  • 34页

  • Microchip   Microchip

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MCP73861/2
Typical Application
1.2A Lithium-Ion Battery Charger
5V
4.7碌F
2, 3
1
14
16
15
5
V
DD
V
SET
EN
V
BAT3
12
10, 11
V
BAT
4.7 碌F
THREF 6
7 6.19 k鈩?/div>
STAT1 THERM
7.32 k鈩?/div>
8
STAT2 TIMER
0.1
碌F
V
SS
4, 9, 13
PROG
+
Single
Lithium-Ion
-
Cell
MCP73861
Functional Block Diagram
Direction
Control
V
DD1
V
DD2
G=0.001
4k鈩?/div>
V
REF
1k鈩?/div>
PROG
90
k鈩?/div>
Charge Current
Control Amplifier
+
鈥?/div>
11k鈩?/div>
V
REF
110k鈩?/div>
10k鈩?/div>
+
-
V
UVLO
Charge
Termination
Comparator
+
-
10k鈩?/div>
V
REF
Charge_OK
Precon
Precondition
Comp.
-
+
600k鈩?/div>
(1.65M鈩?
鈥?/div>
V
DD
V
BAT1
V
BAT2
Voltage Control
Amplifier
+
V
BAT3
I
REG
/12
U
VLO
COMPARATOR
Precondition
Control
148.42k鈩?/div>
Constant Voltage/
Recharge Comp.
-
+
Power-On
Delay
V
REF
300.04k鈩?/div>
V
UVLO
V
REF
(1.2V)
10.3k鈩?/div>
(8.58k鈩?
Drv Stat 1
I
REG
/12
Oscillator
Charge Control,
Charge Timers,
And
Status Logic
Drv Stat 2
Charge_OK
1.58k鈩?/div>
Values in ( )
reflect the
MCP73862
device
EN
Bias and
Reference
Generator
V
SET
THREF
100k鈩?/div>
THERM
50k鈩?/div>
+
-
50k鈩?/div>
TIMER
+
-
Temperature
Comparators
V
SS1
V
SS2
V
SS3
STAT1
STAT2
DS21893A-page 2
铮?/div>
2004 Microchip Technology Inc.

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