MCP73832 Microchip Technology Inc., MCP73832 Datasheet

MCP73832

Manufacturer Part Number

MCP73832

Description

Miniature Single-cell, Fully Integrated Li-ion Li-polymer Charge Management Controllers

Manufacturer

Microchip Technology Inc.

Datasheet

1.MCP73832.pdf (24 pages)

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Download datasheet (803Kb)

Features

• Linear Charge Management Controller:

• High Accuracy Preset Voltage Regulation: + 0.75%

• Four Voltage Regulation Options:

• Programmable Charge Current: 15 mA to 500 mA

• Selectable Preconditioning:

• Selectable End-of-Charge Control:

• Charge Status Output

• Automatic Power-Down

• Thermal Regulation

• Temperature Range: -40°C to +85°C

• Packaging:

Applications

• Lithium-Ion/Lithium-Polymer Battery Chargers

• Personal Data Assistants

• Cellular Telephones

• Digital Cameras

• MP3 Players

• Bluetooth Headsets

• USB Chargers

Typical Application

4.7 μF

- Integrated Pass Transistor

- Integrated Current Sense

- Reverse Discharge Protection

- 4.20V, 4.35V, 4.40V, 4.50V

- 10%, 20%, 40%, or Disable

- 5%, 7.5%, 10%, or 20%

- Tri-State Output - MCP73831

- Open-Drain Output - MCP73832

- 8-Lead, 2 mm x 3 mm DFN

- 5-Lead, SOT-23

470Ω

500 mA Li-Ion Battery Charger

Miniature Single-Cell, Fully Integrated Li-Ion,

Li-Polymer Charge Management Controllers

STAT

MCP73831

PROG

BAT

4.7 μF

2 kΩ

Single

Li-Ion

Cell

Description:

The MCP73831/2 devices are highly advanced linear

charge management controllers for use in space-lim-

ited, cost-sensitive applications. The MCP73831/2 are

available in an 8-Lead, 2 mm x 3 mm DFN package or

a 5-Lead, SOT-23 package. Along with their small

physical size, the low number of external components

required make the MCP73831/2 ideally suited for

portable applications. For applications charging from a

USB port, the MCP73831/2 adhere to all the

specifications governing the USB power bus.

The MCP73831/2 employ a constant-current/constant-

voltage charge algorithm with selectable precondition-

ing and charge termination. The constant voltage

regulation is fixed with four available options: 4.20V,

4.35V, 4.40V or 4.50V, to accommodate new, emerging

battery charging requirements. The constant current

value is set with one external resistor. The MCP73831/

2 devices limit the charge current based on die temper-

ature during high power or high ambient conditions.

This thermal regulation optimizes the charge cycle time

while maintaining device reliability.

Several options are available for the preconditioning

threshold, preconditioning current value, charge

termination value and automatic recharge threshold.

The preconditioning value and charge termination

value are set as a ratio, or percentage, of the

programmed constant current value. Preconditioning

can be disabled. Refer to Section 1.0 “Electrical

Characteristics” for available options and the “Prod-

uct Identification System” for standard options.

The MCP73831/2 devices are fully specified over the

ambient temperature range of -40°C to +85°C.

Package Types

MCP73831/2

STAT

BAT

SOT-23-5

PROG

BAT

(2 mm x 3 mm)

8-Lead DFN

DS21984C-page 1

PROG

STAT

Related parts for MCP73832

MCP73832 Summary of contents

Page 1

... Selectable Preconditioning: - 10%, 20%, 40%, or Disable • Selectable End-of-Charge Control: - 5%, 7.5%, 10%, or 20% • Charge Status Output - Tri-State Output - MCP73831 - Open-Drain Output - MCP73832 • Automatic Power-Down • Thermal Regulation • Temperature Range: -40°C to +85°C • Packaging: - 8-Lead DFN ...

Page 2

... BAT 477 kΩ 255 kΩ 100 kΩ DS21984C-page 2 43.6 kΩ 361 kΩ 3.9 kΩ kΩ PRECONDITION 182.3 kΩ kΩ - TERMINATION + - 7 kΩ CHARGE 190 kΩ + SHDN - DIRECTION + CONTROL - + UVLO - V BAT CA + MCP73831 ONLY - V DD STAT © 2007 Microchip Technology Inc. ...

Page 3

... REG Regulation Note 1: Not production tested. Ensured by design. © 2007 Microchip Technology Inc. † Notice: Stresses above those listed under “Maximum Ratings” may cause permanent damage to the device. This is a stress rating only and functional operation of the device at those or any other conditions above those indicated in the operational listings of this specification is not implied ...

Page 4

... PROG Floating µA V Floating DD µA V < STOP µA Charge Complete SINK (MCP73831) SOURCE µA High-Impedance kΩ kΩ 3.5V ≤ V ≤ V BAT REG V Falling DD 3.5V ≤ V ≤ V BAT BAT REG V Rising DD °C °C © 2007 Microchip Technology Inc. ...

Page 5

... SOT-23 8-Lead mm, DFN Note 1: This represents the minimum copper condition on the PCB (Printed Circuit Board). With large copper area on the PCB, the SOT-23-5 thermal resistance ( θ 2: 130°C/W or better. © 2007 Microchip Technology Inc (typical) + 1.0V] DD REG Min. ...

Page 6

... Constant-Voltage mode Programming Resister (kΩ) Charge Current (I ) vs. OUT ). PROG kΩ PROG 4.75 5.00 5.25 5.50 5.75 6.00 Supply Voltage (V) Charge Current (I ) vs. OUT ). kΩ PROG 4.75 5.00 5.25 5.50 5.75 6.00 Supply Voltage (V) Charge Current (I ) vs. OUT ). DD © 2007 Microchip Technology Inc. ...

Page 7

... Charge Current (I Ambient Temperature ( 120 105 Junction Temperature (°C) FIGURE 2-9: Charge Current (I Junction Temperature ( © 2007 Microchip Technology Inc (typical and T REG OUT 525 kΩ PROG 450 375 300 225 150 vs. FIGURE 2-10: ...

Page 8

... X7R Ceramic OUT -0.30 Time (µs) Load Transient Response. 120 100 MCP73831-2AC/IOT kΩ PROG 0 Time (minutes) Complete Charge Cycle 600 500 400 300 200 100 = 2 kΩ 0 Time (minutes) Complete Charge Cycle © 2007 Microchip Technology Inc. ...

Page 9

... Charge Status Output (STAT) STAT is an output for connection to an LED for charge status indication. Alternatively, a pull-up resistor can be applied for interfacing to a host microcontroller. STAT is a tri-state logic output on the MCP73831 and an open-drain output on the MCP73832. © 2007 Microchip Technology Inc. Table 3-1. Function ...

Page 10

... I BAT TERM CHARGE COMPLETE MODE No Charge Current STAT = HIGH (MCP73831) STAT = Hi-Z (MCP73832) FIGURE 4-1: Flowchart. 4.1 Undervoltage Lockout (UVLO) An internal UVLO circuit monitors the input voltage and keeps the charger in Shutdown mode until the input supply rises above the UVLO threshold. The UVLO circuitry has a built in hysteresis of 100 mV ...

Page 11

... The recharge threshold is factory set. Refer to Section 1.0 “Electrical Characteristics” for recharge threshold options and the ”Product Identification System” for standard options. © 2007 Microchip Technology Inc. 4.8 Thermal Regulation The MCP73831/2 limit the charge current based on the die temperature ...

Page 12

... The charge status output of the MCP73831 has three different states: High (H), Low (L), and High-Imped- ance (Hi-Z). The charge status output of the MCP73832 is open-drain, and, as such, has two different states: Low (L), and High-Impedance (Hi-Z). The charge charge status output can be used to illuminate tri-color LEDs. Optionally, the charge status output can be used as an interface to a host microcontroller ...

Page 13

... COMPONENT SELECTION Selection of the external components in crucial to the integrity and reliability of the charging system. The following discussion is intended as a guide for the component selection process. © 2007 Microchip Technology Inc. cells constant current followed by constant voltage. Figure 6-1 depicts a typical stand-alone application circuit, while accompanying charge profile ...

Page 14

... PCB, thus reducing the maximum junction temperature. typical layout with PCB heatsinking. pin This SS FIGURE 6-4: FIGURE 6-5: Charge Inhibit Charge Status Interface and V pins. BAT SS Figures 6-4 and 6-5 depict a Typical Layout (Top). Typical Layout (Bottom). © 2007 Microchip Technology Inc. ...

Page 15

... Note: Applies to 8-Lead DFN Device Code MCP73831T-2ACI/OT KDNN MCP73831T-2ATI/OT KENN MCP73831T-2DCI/OT KFNN MCP73831T-3ACI/OT KGNN MCP73831T-4ADI/OT KHNN MCP73831T-5ACI/OT KJNN MCP73832T-2ACI/OT KKNN MCP73832T-2ATI/OT KLNN MCP73832T-2DCI/OT KMNN MCP73832T-3ACI/OT KPNN MCP73832T-4ADI/OT KQNN MCP73832T-5ACI/OT KRNN Note: Applies to 5-Lead SOT-23 ) MCP73831/2 Example: AAE 739 25 Example: KD25 e 3 DS21984C-page 15 ...

Page 16

Page 17

Page 18

Page 19

... The following is the list of modifications: 1. Numerous edits throughout document. 2. Added note to Temperature Specifications table. 3. Updated Figure 2-4. Revision B (March 2006) The following is the list of modifications: 1. Added MCP73832 through document. Revision A (November 2005) • Original Release of this Document. © 2007 Microchip Technology Inc. MCP73831/2 DS21984C-page 19 ...

Page 20

Page 21

... Options AT, 5LD SOT23 Pkg MCP73831T-2ATI/OT: Tape and Reel, 4.20V V , Options AT, 5LD SOT23 Pkg REG MCP73832-2ATI/MC: 4.20V V , REG Options AT, 8LD DFN Package MCP73832T-2ATI/MC: Tape and Reel, 4.20V V , Options AT, 8LD DFN Package REG MCP73831-2DCI/OT: 4.20V V , REG Options DC, 5LD SOT23 Pkg MCP73831T-2DCI/OT: Tape and Reel, 4 ...

Page 22

Page 23

... Microchip from any and all damages, claims, suits, or expenses resulting from such use. No licenses are conveyed, implicitly or otherwise, under any Microchip intellectual property rights. © 2007 Microchip Technology Inc. Trademarks The Microchip name and logo, the Microchip logo, Accuron, dsPIC, K ...

Page 24

... Taiwan - Kaohsiung Tel: 886-7-536-4818 Fax: 886-7-536-4803 Taiwan - Taipei Tel: 886-2-2500-6610 Fax: 886-2-2508-0102 Thailand - Bangkok Tel: 66-2-694-1351 Fax: 66-2-694-1350 © 2007 Microchip Technology Inc. EUROPE Austria - Wels Tel: 43-7242-2244-39 Fax: 43-7242-2244-393 Denmark - Copenhagen Tel: 45-4450-2828 Fax: 45-4485-2829 France - Paris ...

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