MCP73223-22SI/MF MICROCHIP [Microchip Technology], MCP73223-22SI/MF Datasheet

MCP73223-22SI/MF

Manufacturer Part Number

MCP73223-22SI/MF

Description

Lithium Iron Phosphate (LiFePO4) Battery Charge Management Controller with Input Overvoltage Protection

Manufacturer

MICROCHIP [Microchip Technology]

Datasheet

1.MCP73223-22SIMF.pdf (34 pages)

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Features

• Complete Linear Charge Management Controller:

• Constant Current / Constant Voltage Operation

• 4.15V Undervoltage Lockout (UVLO)

• 18V Absolute Maximum Input with OVP:

• High Accuracy Preset Voltage Regulation

• Battery Charge Voltage Options:

• Resistor Programmable Fast Charge Current:

• Preconditioning of Deeply Depleted Cells:

• Integrated Precondition Timer:

• Automatic End-of-Charge Control:

• Automatic Recharge:

• Factory Preset Charge Status Output:

• Soft Start

• Temperature Range: -40°C to +85°C

• Packaging: DFN-10 (3 mm x 3 mm)

Applications

• Low-Cost LiFePO

• Power Tools

• Toys

Management Controller with Input Overvoltage Protection

- Integrated Input Overvoltage Protection

- Integrated Pass Transistor

- Integrated Current Sense

- Integrated Reverse Discharge Protection

with Thermal Regulation

- 6.5V - MCP73123

- 13V - MCP73223

Through Full Temperature Range (-5°C to +55°C):

- + 0.5% - MCP73123

- + 0.6% - MCP73223

- 3.6V - MCP73123

- 7.2V - MCP73223

- 130 mA - 1100 mA

- Available Options: 10% or Disable

- 32 Minutes or Disable

- Selectable Minimum Current Ratio:

- Elapse Safety Timer: 4 HR, 6 HR, 8 HR or

- Available Options: 95% or Disable

- On/Off or Flashing

5%, 7.5%, 10% or 20%

Disable

Lithium Iron Phosphate (LiFePO

Battery Chargers

MCP73123/223

• Backup Energy Storages

Description

The MCP73123/223 is a highly integrated Lithium Iron

Phosphate(LiFePO

controller for use in space-limited and cost-sensitive

applications. The MCP73123/223 provides specific

charge algorithms for LiFePO

optimal capacity and safety in the shortest charging

time possible. Along with its small physical size, the low

number

MCP73123/223

applications. The absolute maximum voltage, up to

18V, allows the use of MCP73123/223 in harsh

environments, such as low cost wall wart or voltage

spikes from plug/unplug.

The MCP73123/223 employs a constant current /

constant voltage charge algorithm. The 3.6V per cell

factory preset reference voltage simplifies design with

2V preconditioning threshold. The fast charge,

constant current value is set with one external resistor

from 130 mA to 1100 mA. The MCP73123/223 also

limits the charge current based on die temperature

during high power or high ambient conditions. This

thermal regulation optimizes the charge cycle time

while maintaining device reliability.

The PROG pin of the MCP73123/223 also serves as

enable pin. When high impedance is applied, the

MCP73123/223 will be in standby mode.

The MCP73123/223 is fully specified over the ambient

temperature range of -40°C to +85°C. The MCP73123/

223 is available in a 10 lead, DFN package.

Package Types (Top View)

* Includes Exposed Thermal Pad (EP); see

) Battery Charge

external

BAT

NC 5

ideally

MCP73123/223

) battery charge management

3x3 DFN *

components

suitable

7 STAT

6 NC

batteries to achieve

PROG

DS22191A-page 1

for

makes

Table

various

3-1.

the

Related parts for MCP73223-22SI/MF

MCP73223-22SI/MF Summary of contents

Page 1

... Absolute Maximum Input with OVP: - 6.5V - MCP73123 - 13V - MCP73223 • High Accuracy Preset Voltage Regulation Through Full Temperature Range (-5°C to +55°C 0.5% - MCP73123 - + 0.6% - MCP73223 • Battery Charge Voltage Options: - 3.6V - MCP73123 - 7.2V - MCP73223 • Resistor Programmable Fast Charge Current: - 130 mA - 1100 mA • Preconditioning of Deeply Depleted Cells: - Available Options: 10% or Disable • ...

Page 2

... OVP REG Number MCP73123-22S/MF 3.6V 6.5V MCP73223-C2S/MF 7.2V 6.5V Note 1: Customers should contact their distributor, representatives or field application engineer (FAE) for support and sample. Local sales offices are also available to help customers. A listing of sales offices and locations is included in the back of this document. Technical support is available through the web site at: http//support.microchip.com ...

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Functional Block Diagram Direction Control V DD PROG Reference, V REF Bias, UVLO, and SHDN VO UVLO REG Charge Charge Control, STAT Timer, and Status Logic I nput OverVP Thermal Regulation © 2009 Microchip Technology Inc. (1.21V ...

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... OUT % T = -5°C to +55° (Typical)+1V REG - MCP73123 (Typical)+1V] to 12V DD REG - MCP73223 OUT % 150 mA OUT (Typical)+1V] DD REG mA kHz OUT mA kHz ...

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... PROG = 10 kΩ PROG = 1.1 kΩ % PROG = 1 kΩ kΩ T =-5°C to +55° Preconditioning V MCP73123, V Low-to-High BAT V MCP73223, V Low-to-High BAT High-to-Low (Note 1) V BAT % PROG = 1 kΩ kΩ T =-5°C to +55° High-to-Low ...

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AC CHARACTERISTICS Electrical Specifications: Unless otherwise specified, all limits apply for V Typical values are at +25° (Typical)+1.0V] DD REG Parameters Elapsed Timer Elapsed Timer Period Preconditioning Timer Preconditioning Timer Period Status Indicator Status Output turn-off Status ...

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TYPICAL PERFORMANCE CURVES 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 ...

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MCP73123/223 TYPICAL PERFORMANCE CURVES (CONTINUED) Note: Unless otherwise indicated 950 930 910 890 870 850 830 810 790 R = 1.33 kΩ PROG T = +25°C 770 A 750 4.5 4.8 5.1 5.4 Supply Voltage (V) FIGURE 2-7: ...

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TYPICAL PERFORMANCE CURVES (CONTINUED) Note: Unless otherwise indicated Charge Current Input Voltage Battery Voltage FIGURE 2-13: Overvoltage Protection Start (50 ms/Div). Input Voltage Battery Voltage Charge Current FIGURE 2-14: Overvoltage Protection Stop (50 ms/Div). Output Ripple (mV) Output ...

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... A supply voltage of [V (Typical) + 0.3V] to 6.0V is REG recommended for MCP73123, while a supply voltage of [V (Typical) + 0.3V] to 12.0V is recommended for REG MCP73223. Bypass to V with a minimum of 1 µF. SS The V pin is rated 18V absolute maximum to prevent DD suddenly rise of input voltage from spikes or low cost ac-dc wall adapter. ...

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DEVICE OVERVIEW The MCP73123/223 are simple, but fully integrated lin- ear charge management controllers. Figure 4-1 the operational flow algorithm. V < OVP V > OVP V > OVP OVERVOLTAGE PROTECTION No Charge ...

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DETAILED DESCRIPTION 5.1 Undervoltage Lockout (UVLO) An internal undervoltage lockout (UVLO) circuit monitors the input voltage and keeps the charger in shutdown mode until the input supply rises above the UVLO threshold. In the event a battery is present ...

Page 18

MCP73123/223 5.5 Constant Current MODE - Fast Charge During the constant current mode, the programmed charge current is supplied to the battery or load. The charge current is established using a single resistor from PROG The program ...

Page 19

Thermal Regulation The MCP73123/223 shall limit the charge current based on the die temperature. The thermal regulation optimizes the charge cycle time while maintaining device reliability. Figure 5-1 depicts the thermal regulation for the MCP73123/223 device. Refer to Section ...

Page 20

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APPLICATIONS The MCP73123/223 is designed to operate in con- junction with a host microcontroller or in stand-alone applications. The MCP73123/223 provides the pre- ferred charge algorithm for lithium iron phosphate cells Constant-current followed by Constant-voltage. Figure 6-1 depicts a ...

Page 22

MCP73123/223 6.1 Application Circuit Design Due to the low efficiency of linear charging, the most important factors are thermal design and cost, which are a direct function of the input voltage, output current and thermal impedance between the battery charger ...

Page 23

PCB Layout Issues For optimum voltage regulation, place the battery pack as close as possible to the device’s V BAT recommended to minimize voltage drops along the high current-carrying PCB traces. If the PCB layout is used as a ...

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... In the event the full Microchip part number cannot be marked on one line, it will be carried over to the next line, thus limiting the number of available characters for customer-specific information. © 2009 Microchip Technology Inc. Standard * Part Number Code MCP73123-22SI/MF 77HI MCP73223-C2SI/MF X7HI MCP73123/223 Example: 77HI 0923 256 e ) ...

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Microchip Technology Inc. MCP73123/223 PP %RG\ >')1@ DS22191A-page 27 ...

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... MCP73123/223 . Examples: a) MCP73123-22SI/MF: Single Cell Lithium Iron Phosphate Battery Device b) MCP73123T-22SI/MF: Tape and Reel, Single Cell Lithium Iron Phosphate Battery Device a) MCP73223-C2SI/MF: Dual Cell Lithium Iron Phosphate Battery Device b) MCP73223T-C2SI/MF:Tape and Reel, Dual Cell Lithium Iron Phosphate Battery Device DS22191A-page 31 ...

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Note the following details of the code protection feature on Microchip devices: • Microchip products meet the specification contained in their particular Microchip Data Sheet. • Microchip believes that its family of products is one of the most secure families ...

Page 34

W ORLDWIDE AMERICAS ASIA/PACIFIC Corporate Office Asia Pacific Office 2355 West Chandler Blvd. Suites 3707-14, 37th Floor Chandler, AZ 85224-6199 Tower 6, The Gateway Tel: 480-792-7200 Harbour City, Kowloon Fax: 480-792-7277 Hong Kong Technical Support: Tel: 852-2401-1200 http://support.microchip.com Fax: 852-2401-3431 ...

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