MCP73871EV Microchip Technology, MCP73871EV Datasheet

MCP73871EV

Manufacturer Part Number

MCP73871EV

Description

EVALUATION BOARD FOR MCP73871

Manufacturer

Microchip Technology

Type

Battery Managementr

Datasheets

1.MCP73871-2AAIML.pdf (38 pages)

2.MCP73871EV.pdf (20 pages)

Specifications of MCP73871EV

Main Purpose

Power Management, Battery Charger

Embedded

Utilized Ic / Part

MCP73871

Primary Attributes

1 Cell- Li-Ion / Li-Pol, 4.2V @ 100 or 500mA: USB, 1.65A: AC Adaptor

Secondary Attributes

LED Status Indicators

Silicon Manufacturer

Microchip

Application Sub Type

Battery Charger

Kit Application Type

Power Management - Battery

Silicon Core Number

MCP73871

Product

Power Management Modules

Kit Contents

Board

Lead Free Status / RoHS Status

Lead free / RoHS Compliant

For Use With/related Products

MCP73871

Lead Free Status / RoHS Status

Lead free / RoHS Compliant

Current page: 1 of 38
Download datasheet (639Kb)

Features

• Integrated System Load Sharing and Battery

• Complete Linear Charge Management Controller

• Preset High Accuracy Charge Voltage Options:

• Constant Current / Constant Voltage (CC/CV)

• Maximum 1.8A Total Input Current Control

• Resistor Programmable Fast Charge Current

• Resistor Programmable Termination Set Point

• Selectable USB Input Current Control

• Automatic Recharge

• Automatic End-of-Charge Control

• Safety Timer With Timer Enable/Disable Control

• 0.1C Preconditioning for Deeply Depleted Cells

• Battery Cell Temperature Monitor

• Undervoltage Lockout (UVLO)

• Low Battery Status Indicator (LBO)

• Power-Good Status Indicator (PG)

• Charge Status and Fault Condition Indicators

• Numerous Selectable Options Available for a

• Temperature Range: -40°C to +85°C

• Packaging: 20-Lead QFN (4 mm x 4 mm)

Stand-Alone System Load Sharing and Li-Ion / Li-Polymer

Charge Management

- Simultaneously Power the System and

- Voltage Proportional Current Control (VPCC)

- Low-Loss Power-Path Management with

- Integrated Pass Transistors

- Integrated Current Sense

- Integrated Reverse Discharge Protection

- Selectable Input Power Sources: USB Port or

- 4.10V, 4.20V, 4.35V or 4.40V

- ±0.5% Regulation Tolerance

Operation with Thermal Regulation

Control: 50 mA to 1A

- Absolute Maximum: 100 mA (L) / 500 mA (H)

Variety of Applications:

- Refer to Section 1.0 “Electrical

- Refer to the “Product Identification

Charge the Li-Ion Battery

ensures system load has priority over Li-Ion

battery charge current

Ideal Diode Operation

AC-DC Wall Adapter

Characteristics” for Selectable Options”

System” for Standard Options

Battery Charge Management Controller

Applications

• GPSs / Navigators

• PDAs and Smart Phones

• Portable Media Players and MP3 Players

• Digital Cameras

• Bluetooth Headsets

• Portable Medical Devices

• Charge Cradles / Docking Stations

• Toys

Description

The MCP73871 device is a fully integrated linear

solution for system load sharing and Li-Ion / Li-Polymer

battery charge management with ac-dc wall adapter

and USB port power sources selection. It’s also

capable of autonomous power source selection

between input or battery. Along with its small physical

size, the low number of required external components

makes

applications.

The MCP73871 device automatically obtains power for

the system load from a single-cell Li-Ion battery or an

input power source (ac-dc wall adapter or USB port).

The MCP73871 device specifically adheres to the

current drawn limits governed by the USB specification.

With an ac-dc wall adapter providing power to the

system, an external resistor sets the magnitude of 1A

maximum charge current while supports up to 1.8A

total current for system load and battery charge

current.

The MCP73871 device employs a constant current /

constant voltage (CC/CV) charge algorithm with

selectable charge termination point. The constant

voltage regulation is fixed with four available options:

4.10V, 4.20V, 4.35V, or 4.40V to accommodate new,

emerging

MCP73871 device 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 MCP73871 device includes a low battery indicator,

a power-good indicator and two charge status

indicators that allows for outputs with LEDs or

communication

MCP73871 device is fully specified over the ambient

temperature range of -40°C to +85°C.

MCP73871

the

battery

device

with

charging

ideally

host

microcontrollers.

suited

requirements.

DS22090B-page 1

for

portable

The

Related parts for MCP73871EV

MCP73871EV Summary of contents

Page 1

... Characteristics” for Selectable Options” - Refer to the “Product Identification System” for Standard Options • Temperature Range: -40°C to +85°C • Packaging: 20-Lead QFN ( mm) © 2009 Microchip Technology Inc. MCP73871 Applications • GPSs / Navigators • PDAs and Smart Phones • Portable Media Players and MP3 Players • ...

Page 2

... PROG3 MCP73871 Typical Application OUT 2 VPCC 14, 15 BAT 6 PG THERM 5 7 STAT2 8 STAT1 PROG1 R 13 LBO 3 SEL 4 12 PROG3 PROG2 10, 11 System Load 4.7 µF 4.7 µF NTC 10 kΩ Single-Cell Li-Ion Battery PROG1 R PROG3 © 2009 Microchip Technology Inc. ...

Page 3

... CURRENT LIMIT + V + REF VPCC - CA + CHRG + TERM UVLO, + STAT1 REFERENCE, CHARGE CONTROL, HTVT TIMER, STAT2 AND + STATUS LOGIC TE LTVT + © 2009 Microchip Technology Inc. V REF - V /2 REF - V - REF PRECONDITION + V - REF - V REF V - REF V - REF V REF - - MCP73871 OUT 0.2Ω Ideal Diode, Synchronous Switch ...

Page 4

Page 5

... The value is ensured by design and not production tested. 2: The maximum available charge current is also limited by the value set at PROG1 input. © 2009 Microchip Technology Inc. † Notice: Stresses above those listed under “Maximum Ratings” may cause permanent damage to the device. This is ...

Page 6

... V = 4.5V 105° µA Shutdown (V < V < BAT DD UVLO µA Shutdown (0 < V < BAT µ Power Out, No Load BAT µA Charge Complete SINK µA High Impedance pin DD V > Hi-Z BAT =-5°C to +55° Low-to-High BAT © 2009 Microchip Technology Inc. ...

Page 7

... Lower Trip Point Hysteresis Thermal Shutdown Die Temperature Die Temperature Hysteresis Note 1: The value is ensured by design and not production tested. 2: The maximum available charge current is also limited by the value set at PROG1 input. © 2009 Microchip Technology Inc 0. REG Sym Min Typ ...

Page 8

... Rising to 90 OUT REG ms Average V Rise/Fall BAT ms Average I Falling OUT ms Average V Falling BAT ms Average THERM Rise/Fall Hours Hours Hours Hours µ SINK µ SINK Units Conditions °C °C °C °C/W 4-Layer JC51-7 Standard Board, Natural Convection © 2009 Microchip Technology Inc. ...

Page 9

... R (kΩ) PROG FIGURE 2-3: Charge Current (I Programming Resistor (R ). PROG © 2009 Microchip Technology Inc (typical and T REG OUT 4.300 4.280 4.260 4.240 4.220 4.200 4.180 4.160 4.140 4.120 4.100 5.9 ...

Page 10

... Constant-voltage mode kΩ 4.8 5.0 5.3 5.5 5.8 6.0 Supply Voltage (V) Charge Current (I ) vs. OUT ). kΩ PROG V = 5.2V DD -30 - Ambient Temperature (°C) Charge Current (I ) vs. OUT ). kΩ PROG V = 5. Ambient Temperature (°C) Charge Current (I ) vs. OUT ). A © 2009 Microchip Technology Inc. ...

Page 11

... Junction Temperature ( 600 500 400 300 200 100 kΩ PROG 100 Ambient Temperature (°C) FIGURE 2-15: Charge Current (I Junction Temperature ( © 2009 Microchip Technology Inc (typical and T REG OUT 120 100 PROG vs. FIGURE 2-16: OUT Junction Temperature (T 52.0 Temperature = +25°C 51 ...

Page 12

... FIGURE 2-24: = +25°C, Constant-voltage mode. A 0.2 = 100 mA 0.1 0 -0.1 -0.2 -0.3 -0.4 -0.5 0 0.001 0.002 0.003 0.004 Time (s) Load Transient Response. 0.2 = 500 mA 0.1 0 -0.1 -0.2 -0.3 -0.4 -0.5 Time (s) Load Transient Response. Time (ms) Undervoltage Lockout. © 2009 Microchip Technology Inc. ...

Page 13

... DD SEL = Low 2 PROG2 = Low 1 0.1 0.2 0.3 0.4 Time (Minutes) FIGURE 2-26: Complete Charge Cycle (130 mAh Li-Ion Battery). © 2009 Microchip Technology Inc (typical and T REG OUT 4.5 4 3.5 3 2.5 2 1 FIGURE 2-27: (1000 mAh Li-Ion Battery). ...

Page 14

Page 15

... Also, this feature gives the system priority on input power, allowing the system to power-up with deeply depleted battery packs. Bypass to V minimum of 4.7 µF is recommended. © 2009 Microchip Technology Inc. Table 3-1. Function > ...

Page 16

... Refer to Table 5-1 for a summary of the status output during a charge cycle. . PROG1 sets the SS Table 5-1 for a summary of the Table 5-1 for a summary of the Table 5-1 for a summary of the status © 2009 Microchip Technology Inc. ...

Page 17

... Refer to Section 6.0 “Applications” for calculations of resistance values. © 2009 Microchip Technology Inc. 3.16 Charge Enable (CE) With the CE input Low, the Li-Ion battery charger feature of the MCP73871 will be disabled. The charger feature is enabled when CE is active High ...

Page 18

Page 19

... Figure 4-1 operational flow algorithm. TEMPERATURE FAULT No Charge Current STAT1 = LOW STAT2 = LOW PG = LOW Timer Suspended FIGURE 4-1: MCP73871 Device Flow Chart. © 2009 Microchip Technology Inc. depicts the SHUTDOWN MODE * * Continuously Monitored V < UVLO V < BAT STAT1 = Hi-Z ...

Page 20

... The regulation voltage is factory set to 4.10V or 4.20V with a tolerance of ±0.5%. pin is less than the BAT for preconditioning pin rises above the BAT . The program resistor and the 1000V = ------------------- - R PROG1 . REG pin reaches the BAT , constant voltage regulation REG © 2009 Microchip Technology Inc. ...

Page 21

... Li-Ion batteries to prolong life of Li-Ion batteries while keeping their capacity at healthy level. © 2009 Microchip Technology Inc. 4.9 Thermal Regulation The MCP73871 device limits the charge current based on the die temperature. The thermal regulation optimizes the charge cycle time while maintaining or internal timer device reliability ...

Page 22

Page 23

... The MCP73871 device compares the DD voltage at the THERM pin to factory set thresholds of © 2009 Microchip Technology Inc. 1.24V and 0.25V, typically. Once a voltage outside the thresholds is detected during a charge cycle, the MCP73871 device immediately suspends the charge cycle. ...

Page 24

... The TE input can be used to disable the timer when the charger is supplying current to charge the battery and power the system load. The TE input is compatible with 1.8V logic. © 2009 Microchip Technology Inc. ...

Page 25

... R 1.5 PROG3 1 0 Time (Minute) FIGURE 6-2: Typical Charge Profile (1000 mAh Battery). © 2009 Microchip Technology Inc. and Lithium-Polymer cells Constant-current followed by Constant-voltage. stand-alone MCP73871 application circuit, while or in Figures 6-2 and profile. MCP73871 Device Typical Application OUT BAT 14, 15, 16 ...

Page 26

... V BAT SS and R can be calculated T1 T2 × Ω T2 COLD = R + -------------------------------- - COLD × Ω T2 HOT ---------------------------- - HOT the fixed series resistance the fixed parallel resistance the thermistor resistance at the lower temperature of interest the thermistor resistance at the upper temperature of interest © 2009 Microchip Technology Inc. . ...

Page 27

... BAT drive a maximum current up to 2A. The built-in thermal shutdown protection may turn the MCP73871 device off with high current. © 2009 Microchip Technology Inc. 6.2 PCB Layout Issues For optimum voltage regulation, place the battery pack as close as possible to the device’s V ...

Page 28

Page 29

... Note: 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. Marking Marking Part Number * Code ...

Page 30

Page 31

... Microchip Technology Inc. MCP73871 DS22090B-page 31 ...

Page 32

Page 33

... Revision B (May 2009) The following is the list of modifications: 1. Updated the QFN-20 package drawing. 2. Updated Equation 4-1. Updated Section 4.7 “Charge Termination” 3. and Equation 4-2. 4. Updated Equation 5-1. Revision A (July 2008) • Original Release of this Document. © 2009 Microchip Technology Inc. MCP73871 DS22090B-page 33 ...

Page 34

Page 35

... Consult Factory for Alternative Device Options. © 2009 Microchip Technology Inc. MCP73871 . Examples MCP73871-1AAI/ML: b) MCP73871-1CAI/ML: c) MCP73871-1CCI/ML: d) MCP73871-2AAI/ML: e) MCP73871-2CAI/ML: f) MCP73871-2CCI/ML: g) MCP73871-3CAI/ML: h) MCP73871-3CCI/ML Consult Factory for Alternative Device Options ...

Page 36

Page 37

... PowerInfo, PowerMate, PowerTool, REAL ICE, rfLAB, Select Mode, Total Endurance, TSHARC, WiperLock and ZENA are trademarks of Microchip Technology Incorporated in the U.S.A. and other countries. SQTP is a service mark of Microchip Technology Incorporated in the U.S.A. All other trademarks mentioned herein are property of their respective companies. ...

Page 38

... Fax: 886-3-6578-370 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 © 2009 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 Tel: 33-1-69-53-63-20 ...

Related keywords

mcp73871
mcp73871ev
mcp73871dm-vpcc
MCP73871EV datasheet
MCP73871EV data sheet
MCP73871EV pdf datasheet
MCP73871EV component
MCP73871EV part
MCP73871EV distributor
MCP73871EV RoHS
MCP73871EV datasheet download