MCP73811 MICROCHIP [Microchip Technology], MCP73811 Datasheet

MCP73811

Manufacturer Part Number

MCP73811

Description

Simple, Miniature Single-Cell, Fully Integrated Li-Ion / Li-Polymer Charge Management Controllers

Manufacturer

MICROCHIP [Microchip Technology]

Datasheet

1.MCP73811.pdf (22 pages)

Available stocks

Company

Part Number

Manufacturer

Quantity

Price

Company:

Meier Automation Equipment Co., Limited

Part Number:

MCP73811T-420I/OT

Manufacturer:

MICROCHIP/微芯

Quantity:

20 000

Current page: 1 of 22
Download datasheet (2Mb)

Features

• Complete Linear Charge Management Controller

• Constant Current / Constant Voltage Operation

• High Accuracy Preset Voltage Regulation: + 1%

• Voltage Regulation: 4.20V

• Selectable Charge Current:

• Programmable Charge Current:

• Minimum External Components Required:

• No Preconditioning

• No End-of-Charge Control

• No Undervoltage Lockout (UVLO)

• Automatic Power-Down when Input Power

• Active High Charge Enable

• Temperature Range:

• Packaging:

Applications

• Low-Cost Lithium-Ion/Lithium-Polymer Battery

• Rechargeable Toys

• Electronic Cigarettes

• Bluetooth Headsets

• USB Chargers

- Integrated Pass Transistor

- Integrated Current Sense

- Integrated Reverse Discharge Protection

with Thermal Regulation

- MCP73811: 85 mA / 450 mA

- MCP73812: 50 mA - 500 mA

- MCP73811: 2 Ceramic Capacitors

- MCP73812: 2 Ceramic Capacitors and

Removed

- -40°C to +85°C

- 5-Lead SOT-23

Chargers

1 Resistor

Li-Ion / Li-Polymer Charge Management Controllers

Simple, Miniature Single-Cell, Fully Integrated

Description

The MCP73811/2 devices are linear charge manage-

ment controllers that are designed for use in space

limited

MCP73811/2 provide specific charge algorithms for

single cell Li-Ion or Li-Polymer battery to achieve

optimal capacity in the shortest charging time possible.

Along with its small physical size, the low number of

external components required make the MCP73811/2

ideally suited for portable applications. For applications

charging from a USB port, the MCP73811 adheres to

all the specifications governing the USB power bus.

The MCP73811/2 employ a constant current/constant

voltage charge algorithm. The constant voltage regula-

tion is fixed at 4.20V, with a tight regulation tolerance of

1%. For the MCP73811, the constant current value is

selected as 85 mA (low power USB port) or 450 mA

(high power USB port) with a digital input signal on the

PROG input. For the MCP73812, the constant current

value

MCP73811/2 limit 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 MCP73811/2 are fully specified over the ambient

temperature

MCP73811/2 are available in a 5-Lead, SOT-23

package.

Package Types

MCP73811/2

is set

BAT

and

range

cost

with one

5-Pin SOT-23

sensitive

-40°C

external

applications.

DS22036A-page 1

PROG

resistor. The

+85°C.

The

Related parts for MCP73811

MCP73811 Summary of contents

Page 1

... The MCP73811/2 employ a constant current/constant voltage charge algorithm. The constant voltage regula- tion is fixed at 4.20V, with a tight regulation tolerance of 1%. For the MCP73811, the constant current value is selected (low power USB port) or 450 mA (high power USB port) with a digital input signal on the PROG input ...

Page 2

... G=0.001 PROG Reference Generator V (1.21V) REF DS22036A-page 2 500 mA Li-Ion Battery Charger Single Li-Ion 1 µF - Cell 1 CE MCP73811 2.7 kΩ 12 kΩ 388.7 kΩ 111 kΩ 157.3 kΩ Direction Control + 528.6 kΩ BAT Charge Enable + - 3 V BAT + Single Li-Ion 1 µF - ...

Page 3

... kHz OUT dB I =10 mA kHz OUT dB I =10 mA MHz OUT mA MCP73811 - PROG = Low mA MCP73811 - PROG = High mA MCP73812 - PROG = 20 kΩ mA MCP73812 - PROG = 10 kΩ mA MCP73812 - PROG = 2 kΩ =-5°C to +55°C A mΩ 3.75V 105° ...

Page 4

... DC CHARACTERISTICS (Continued) Electrical Specifications: Unless otherwise indicated, all limits apply for -40°C to +85°C. Typical values are at +25° Parameters Sym Charge Enable (CE), PROG Input - MCP73811 Input High Voltage Level V IH Input Low Voltage Level V IL Input Leakage Current ...

Page 5

... Ambient Temperature (T MCP73811/2 = +25°C, Constant-voltage mode. A PROG = Low Temp = +25°C 4.75 5 5.25 5.5 5.75 6 Supply Voltage (V) Charge Current (I ) vs. OUT ) - MCP73811. DD PROG = High Temp = 25°C 4.75 5 5.25 5.5 5.75 6 Supply Voltage (V) Charge Current (I ) vs. OUT ) - MCP73811. DD PROG = Low Ambient Temperature (°C) Charge Current (I ) vs. OUT ) - MCP73811. A DS22036A-page 5 ...

Page 6

... Note: Unless otherwise indicated 480 470 460 450 440 430 420 410 400 -40 -30 -20 - Ambient Temperature (°C) FIGURE 2-7: Charge Current (I Ambient Temperature ( MCP73811. A 550 500 450 400 350 300 250 200 150 100 ...

Page 7

... Rejection (PSRR kΩ PROG vs. FIGURE 2-17: OUT 100 1000 FIGURE 2-18: MCP73811/2 = +25°C, Constant-voltage mode 100 1000 Frequency (kHz) Power Supply Ripple 0.10 0.05 0.00 -0.05 -0.10 -0.15 -0. OUT C = 4.7 µF, X7R -0.25 OUT Ceramic -0.30 Time (µs) Line Transient Response. ...

Page 8

... MCP73811/2 Typical Performance Curves (Continued) Note: Unless otherwise indicated 0.35 0.30 0.25 0.20 0.15 0.10 0. 4.7 µF, X7R OUT 0.00 Ceramic -0.05 Time (µs) FIGURE 2-19: Load Transient Response. 1.40 1.20 1.00 0.80 0.60 0.40 0. 4.7 µF, X7R OUT 0.00 Ceramic -0.20 Time (µs) FIGURE 2-20: Load Transient Response. DS22036A-page (typ and T REG OUT 0.04 6.0 0.02 5.0 0.00 4.0 -0.02 3.0 -0.04 -0.06 2.0 MCP73812/IOT -0.08 V 1.0 DD -0.10 R PROG -0 ...

Page 9

... A supply voltage of [V recommended. Bypass to V 3.5 Current Regulation Set (PROG) For the MCP73811, the current regulation set input (PROG) functions as a digital input selection. A logic Low selects charge current; a logic High selects a 450 mA charge current. For the MCP73812, the charge current is set by placing ...

Page 10

... The automatic circuit is always active. Whenever the input supply is within + the voltage at the V pin, the MCP73811/2 is placed in a shutdown mode. During power down condition, the battery reverse dis- charge current is less than 2 µA. For a charge cycle to begin, the automatic power down conditions must be met and the charge enable input must be above the input high threshold ...

Page 11

... Thermal Regulation The MCP73811/2 limits the charge current based on the die temperature. The thermal regulation optimizes the charge cycle time while maintaining device reliability. Figure 4-2 depicts the thermal regulation for the MCP73811/2. . 525 450 375 300 225 150 75 0 Junction Temperature (°C) FIGURE 4-2: Thermal Regulation ...

Page 12

... MCP73811 CURRENT REGULATION SELECT (PROG) For the MCP73811, driving the PROG input to a logic Low selects the low charge current setting (85 mA). Driving the PROG input to a logic High selects the high ) PROG charge current setting (450 mA). © ...

Page 13

... APPLICATIONS The MCP73811/2 is designed to operate in conjunction with a host microcontroller or applications. The MCP73811/2 provides the preferred C IN REGULATED WALL CUBE FIGURE 6-1: Typical Application Circuit. 6.0 5.0 4.0 3.0 2.0 MCP73812/IOT V = 5.2V 1 kΩ PROG 0.0 Time (s) FIGURE 6-2: Typical Charge Profile (180 mAh Battery). 6.0 5.0 4.0 3.0 2.0 MCP738312 V = 5.2V 1 kΩ PROG ...

Page 14

... SOT-23-5 package will cause thermal regulation to be entered as depicted in Figure 6-3. 6.1.1.3 External Capacitors The MCP73811/2 is stable with or without a battery load. In order to maintain good AC stability in the Constant-voltage mode, a minimum capacitance of 1 µF is recommended to bypass the V This capacitance provides compensation when there is no battery load. In addition, the battery and intercon- nections appear inductive at high frequencies ...

Page 15

... 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. © 2007 Microchip Technology Inc. Standard * Part Number Code MCP73811T-420I/OT KSNN MCP73812T-420I/OT KWNN MCP73811/2 Example: KSNN DS22036A-page 15 ...

Page 16

... MCP73811/2 5-Lead Plastic Small Outline Transistor (OT or CT) [SOT-23] Note: For the most current package drawings, please see the Microchip Packaging Specification located at http://www.microchip.com/packaging Number of Pins Lead Pitch Outside Lead Pitch Overall Height Molded Package Thickness Standoff ...

Page 17

Page 18

Page 19

... PART NO. XXX X Device Voltage Temperature Options Device: MCP73811T: Li-Ion Charger w/Selectable Charge Current, Tape and Reel MCP73812T: Li-Ion Charger w/Selectable Charge Current, Tape and Reel Voltage Options *: 420 = 4.2V “Standard” *Contact factory for other output voltage options. Temperature -40°C to +85°C ...

Page 20

Page 21

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 22

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 Habour 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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