Microchip MCP73862 Handleiding

Microchip Niet gecategoriseerd MCP73862

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2004-2013 Microchip Technology Inc. DS21893F-page 1
MCP73861/2/3/4
Features:
• Linear Charge Management Controllers:
- Integrated Pass Transistor
- Integrated Current Sense
- Reverse-Blocking Protection
• High-Accuracy Preset Voltage Regulation: + 0.5%
• Four Selectable Voltage Regulation Options:
- 4.1V, 4.2V – MCP73861/3
- 8.2V, 8.4V – MCP73862/4
• Programmable Charge Current: 1.2A Maximum
• Programmable Safety Charge Timers
• Preconditioning of Deeply Depleted Cells
• Automatic End-of-Charge Control
• Optional Continuous Cell Temperature Monitoring
• Charge Status Output for Direct LED Drive
• Fault Output for Direct LED Drive
• Automatic Power-Down
• Thermal Regulation
• Temperature Range: -40°C to +85°C
• Packaging: 16-Pin, 4 x 4 QFN
16-Pin SOIC
Applications:
• Lithium-Ion/Lithium-Polymer Battery Chargers
• Personal Data Assistants (PDAs)
• Cellular Telephones
• Hand-Held Instruments
• Cradle Chargers
• Digital Cameras
• MP3 Players
Description:
The MCP7386X family of devices features highly
advanced linear charge management controllers for
use in space-limited, cost-sensitive applications. The
devices combine high-accuracy, constant voltage and
current regulation, cell preconditioning, cell
temperature monitoring, advanced safety timers,
automatic charge termination, internal current sensing,
reverse-blocking protection, charge status and fault
indication in either a space-saving 16-pin 4 x 4 QFN
package, or a 16-pin SOIC package. The MCP7386X
provides a complete, fully functional, stand-alone
charge management solution with a minimum number
of external components.
The MCP73861/3 is intended for applications utilizing
single-cell Lithium-Ion or Lithium-Polymer battery
packs, while the MCP73862/4 is intended for dual
series cell Lithium-Ion or Lithium-Polymer battery
packs. The MCP73861/3 has two selectable
voltage-regulation options available (4.1V and 4.2V),
for use with either coke or graphite anodes and operate
with an input voltage range of 4.5V to 12V. The
MCP73862/4 has two selectable voltage-regulation
options available (8.2V and 8.4V), for use with coke or
graphite anodes, and operate with an input voltage
range of 8.7V to 12V.
The MCP73861/2 and MCP73863/4 differ only in the
function of the charge status output (STAT1) when a
charge cycle has been completed. The MCP73861/2
flashes the output, while the MCP73863/4 turns the
output off. Refer to Section 5.2.1 “Charge Status
Outputs (STAT1, STAT2)”.
The MCP7386X family of devices are fully specified
over the ambient temperature range of -40°C to +85°C.
Advanced Single or Dual Cell, Fully Integrated Li-Ion/Li-Polymer
Charge Management Controllers
MCP73861/2/3/4
DS21893F-page 2 2004-2013 Microchip Technology Inc.
Package Types
VDD1
VBAT3
THERM
EN
TIMER
STAT1
STAT2 1
2
3
4
14
15
16
PROG
VDD2
VSET
VSS1
THREF
VBAT1
VBAT2
5
6
7
8 9
10
11
12
13
VSS2
VSS3
16-Pin SOIC16-Pin QFN
2
VDD2
VSS1
VSET VBAT3
VBAT2
PROG
VBAT1
THREF
THERM
TIMER
VSS3
STAT1
STAT2
EN
VSS2
VDD2 EP
16
1
15 14 13
3
4
12
11
10
9
5 6 7 8
17
2004-2013 Microchip Technology Inc. DS21893F-page 3
MCP73861/2/3/4
Typical Application
Functional Block Diagram
EN
STAT1
STAT2
VSET
VDD
VSS
TIMER
PROG
THERM
THREF
VBAT3
VBAT
+
–
Single
Lithium-Ion
Cell
2, 3
1
MCP73861/3
5
6
7
8
4, 9, 13
10, 11
12
14
16
15
5V
6.19 kΩ
4.7µF
1.2A Lithium-Ion Battery Charger
4.7 µF
7.32 kΩ
0.1
µF Note: Pin numbers shown are for QFN
package. Please refer to Section 6.0
“Applications” for details.
+
–
Charge
Termination
Comparator
Voltage Control
Amplifier
+
–
UVLO
COMPARATOR
VUVLO
+
–
Temperature
Comparators
+
–
Bias and
Reference
Generator
VUVLO
VREF (1.2V)
Power-On
Delay
+
–
+
–
VREF
VREF
Oscillator
IREG/12
Constant-Voltage/
Recharge Comp.
Precondition
Control
Charge_OK
Precon
VDD
Charge Current
Control Amplifier
+
–
VREF
VREF
+
–
Precondition
Comp.
Charge Control,
Charge Timers
And Status Logic Drv Stat 2
Drv Stat 1
Charge_OK
IREG
/12
VDD1
THERM
EN
TIMER
STAT1
STAT2
VBAT3
VSS1
PROG
VSET
THREF
VBAT1
90
110 k Ω
10 kΩ
10 kΩ
100 kΩ
50 kΩ
50 kΩ
G = 0.001
11 kΩ
1 kΩ
600 kΩ
(1.65 MΩ)
148.42 kΩ
1.58 kΩ
VDD2 VBAT2
300.04 kΩ
10.3 kΩ
(8.58 kΩ)
4 kΩ
Direction
Control
kΩ
VSS2
VSS3
Values in ( )
reflect the
MCP73862/4
devices

Product specificaties

Merk: Microchip
Categorie: Niet gecategoriseerd
Model: MCP73862

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