MCP73827 Microchip Technology, Inc., MCP73827 Datasheet

MCP73827

Manufacturer Part Number

MCP73827

Description

The MCP73827 is a Battery Charger Controller For Single Cell Li-ion Batteries

Manufacturer

Microchip Technology, Inc.

Datasheet

1.MCP73827.pdf (24 pages)

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Company:

Bonase Electronics (HK) Co., Limited

Part Number:

MCP73827-4.1VUA

Manufacturer:

Microchip Technology

Quantity:

135

Company:

Bonase Electronics (HK) Co., Limited

Part Number:

MCP73827-4.1VUATR

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Microchip Technology

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H&T Electronics

Part Number:

MCP73827-4.2VUA

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Current page: 1 of 24
Download datasheet (556Kb)

Features

• Linear Charge Management Controller for Single

• High Accuracy Preset Voltage Regulation:

• Two Preset Voltage Regulation Options:

• Programmable Charge Current

• Automatic Cell Preconditioning of Deeply

• Charge Status Output for LED Drive or Microcon-

• Charge Current Monitor Output

• Automatic Power-Down when Input Power

• 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

Lithium-Ion Cells

- 4.1V - MCP73827-4.1

- 4.2V - MCP73827-4.2

Depleted Cells, Minimizing Heat Dissipation Dur-

ing Initial Charge Cycle

troller Interface

Removed

2002 Microchip Technology Inc.

10 µF

MA2Q705

Single Cell Lithium-Ion Charge Management Controller

+ 1% (max)

with Mode Indicator and Charge Current Monitor

500 mA Lithium-Ion Battery Charger

100 k

332

100 m

SHDN

MODE

MCP73827

SNS

NDS8434

GND

MON

DRV

BAT

10 µF

Single

Lithium-Ion

Cell

Description

The MCP73827 is a linear charge management con-

troller for use in space-limited, cost sensitive applica-

tions. The MCP73827 combines high accuracy

constant voltage, controlled current regulation, cell pre-

conditioning, and charge status indication in a space

saving 8-pin MSOP package. The MCP73827 provides

a stand-alone charge management solution.

The MCP73827 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 MCP73827

enters the controlled current phase. The MCP73827

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 MCP73827 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 MCP73827-4.1 is preset

MCP73827-4.2 is preset to 4.2V. The charge status

output, MODE, indicates when the charge cycle has

transitioned to constant voltage mode. The charge

cycle can be terminated by a timer that is started when

the MODE pin goes to a logic High or by monitoring the

charge current monitor output, I

current.

The MCP73827 operates with an input voltage range

from 4.5V to 5.5V. The MCP73827 is fully specified

over the ambient temperature range of -20°C to +85°C.

Package Type

MSOP

regulation

MCP73827

MODE

SHDN 1

GND

MON

voltage

MCP73827

MON

4.1V,

, for a minimum

DS21704A-page 1

DRV

BAT

SNS

while

the

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