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PDF MCP73828 Data sheet ( Hoja de datos )
| Número de pieza | MCP73828 | |
| Descripción | Single Cell Lithium-Ion Charge Management Controller | |
| Fabricantes | Microchip Technology | |
| Logotipo |  |
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M
MCP73828
Single Cell Lithium-Ion Charge Management Controller
with Charge Complete Indicator and Temperature Monitor
Features
• Linear Charge Management Controller for Single
Lithium-Ion Cells
• High Accuracy Preset Voltage Regulation:
+1% (max)
• Two Preset Voltage Regulation Options:
- 4.1V - MCP73828-4.1
- 4.2V - MCP73828-4.2
• Programmable Charge Current
• Automatic Cell Preconditioning of Deeply
Depleted Cells, Minimizing Heat Dissipation
During Initial Charge Cycle
• Charge Complete Output CD10 for LED or
Microcontroller Interface
• Continuous Temperature Monitoring
• Automatic Power-Down when Input Power
Removed
• Temperature Range: -20°C to +85°C
• Packaging: 8-Pin MSOP
Applications
• Single Cell Lithium-Ion Battery Chargers
• Personal Data Assistants
• Cellular Telephones
• Hand Held Instruments
• Cradle Chargers
• Digital Cameras
Typical Application Circuit
500 mA Lithium-Ion Battery Charger
V5VIN MA2Q705
10 µF
100 mΩ NDS8434
332 Ω
100 kΩ
76
VSNS VDRV
8 VIN
VBAT 5
1 SHDN GND 2
4 CD10 THERM 3
MCP73828
Thermistor
+ Single
- Lithium-Ion
Cell
10 µF
Description
The MCP73828 is a linear charge management con-
troller for use in space-limited, cost sensitive applica-
tions. The MCP73828 combines high accuracy
constant voltage, controlled current regulation, cell pre-
conditioning, cell temperature monitoring, and charge
complete indication in a space saving 8-pin MSOP
package. The MCP73828 provides a stand-alone
charge management solution.
The MCP73828 charges the battery in three phases:
preconditioning, controlled current, and constant volt-
age. If the battery voltage is below the internal low-volt-
age threshold, the battery is preconditioned with a
foldback current. The preconditioning phase protects
the lithium-ion cell and minimizes heat dissipation.
Following the preconditioning phase, the MCP73828
enters the controlled current phase. The MCP73828
allows for design flexibility with a programmable charge
current set by an external sense resistor. The charge
current is ramped up, based on the cell voltage, from
the foldback current to the peak charge current estab-
lished by the sense resistor. This phase is maintained
until the battery reaches the charge-regulation voltage.
Then, the MCP73828 enters the final phase, constant
voltage. The accuracy of the voltage regulation is better
than ±1% over the entire operating temperature range
and supply voltage range. The MCP73828-4.1 is preset
to a regulation voltage of 4.1V, while the MCP73828-
4.2 is preset to 4.2V. The charge complete output,
CD10, indicates when the charge current has dimin-
ished to approximately 10% of the peak charge current
established by the sense resistor.
The MCP73828 operates with an input voltage range
from 4.5V to 5.5V. The MCP73828 is fully specified
over the ambient temperature range of -20°C to +85°C.
Package Type
MSOP
SHDN 1
GND 2
THERM 3
CD10 4
MCP73828
8 VIN
7 VSNS
6 VDRV
5 VBAT
2002 Microchip Technology Inc.
DS21706A-page 1
1 page  
MCP73828
2.0 TYPICAL PERFORMANCE CHARACTERISTICS
Note:
The graphs and tables provided following this note are a statistical summary based on a limited number of
samples and are provided for informational purposes only. The performance characteristics listed herein
are not tested or guaranteed. In some graphs or tables, the data presented may be outside the specified
operating range (e.g., outside specified power supply range) and therefore outside the warranted range.
Note: Unless otherwise indicated, IOUT= 10 mA, Constant Voltage Mode, TA=25°C. Refer to Figure 1-1 for test circuit.
4.205
4.204
4.203
4.202
4.201
4.200
4.199
4.198
4.197
4.196
4.195
0
200 400 600
Output Current (mA)
800
1000
FIGURE 2-1: Output Voltage vs. Output Current
(MCP73828-4.2).
350
325
300
275
250
225
200
0
200 400 600 800
Output Current (mA)
1000
FIGURE 2-4: Supply Current vs. Output Current.
4.205
4.204
IOUT = 1000 mA
4.203
4.202
4.201
4.200
4.199
4.198
4.197
4.196
4.195
4.5 4.6 4.7 4.8 4.9 5.0 5.1 5.2 5.3 5.4 5.5
Input Voltage (V)
FIGURE 2-2: Output Voltage vs. Input Voltage
(MCP73828-4.2).
350
IOUT = 1000 mA
325
300
275
250
225
200
4.5 4.6 4.7 4.8 4.9 5.0 5.1 5.2 5.3 5.4 5.5
Input Voltage (V)
FIGURE 2-5: Supply Current vs. Input Voltage.
4.205
4.204
IOUT = 10 mA
4.203
4.202
4.201
4.200
4.199
4.198
4.197
4.196
4.195
4.5 4.6 4.7 4.8 4.9 5.0 5.1 5.2 5.3 5.4 5.5
Input Voltage (V)
FIGURE 2-3: Output Voltage vs. Input Voltage
(MCP73828-4.2).
350
IOUT = 10 mA
325
300
275
250
225
200
4.5 4.6 4.7 4.8 4.9 5.0 5.1 5.2 5.3 5.4 5.5
Input Voltage (V)
FIGURE 2-6: Supply Current vs. Input Voltage.
2002 Microchip Technology Inc.
DS21706A-page 5
5 Page 
MCP73828
6.0 APPLICATIONS
The MCP73828 is designed to operate in conjunction
with a host microcontroller or in stand-alone applica-
tions. The MCP73828 provides the preferred charge
algorithm for Lithium-Ion cells, controlled current fol-
lowed by constant voltage. Figure 6-1 depicts a typical
stand-alone application circuit and Figure 6-2 depicts
the accompanying charge profile.
MA2Q705
22 kΩ
VOLTAGE
REGULATED
WALL CUBE
100 kΩ
10 µF 332 Ω
SHDN 1
GND 2
THERM 3
RS CD10 4
RP
Q1
RSENSE NDS8434
100 mΩ
IOUT
PACK+
10 µF
MCP73828
8 VIN
7 VSNS
6 VDRV
5 VBAT
PACK-
+
-
RTHERMISTOR
FIGURE 6-1: Typical Application Circuit.
TEMP
SINGLE CELL
LITHIUM-ION
BATTERY PACK
REGULATION
VOLTAGE
(VREG)
REGULATION
CURRENT
(IOUT(PEAK))
TRANSITION
THRESHOLD
PRECONDITIONING
PHASE
CONTROLLED CURRENT
PHASE
CHARGE
VOLTAGE
CONSTANT VOLTAGE
PHASE
PRECONDITION
CURRENT
CHARGE COMPLETE
CURRENT
(10% IOUT(PEAK))
5V
CD10 - CHARGE
COMPLETE OUTPUT
0V
FIGURE 6-2: Typical Charge Profile.
CHARGE
CURRENT
2002 Microchip Technology Inc.
DS21706A-page 11
11 Page | ||
| Páginas | Total 24 Páginas | |
| PDF Descargar | [ Datasheet MCP73828.PDF ] | |
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