MP26056 MPS, MP26056 Datasheet

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MP26056

Manufacturer Part Number
MP26056
Description
28v, Li+single-cell Battery Charger With Usb/ac-adapter Input
Manufacturer
MPS
Datasheet
The Future of Analog IC Technology
DESCRIPTION
The MP26056 is a linear, high performance
single cell Li-Ion or Li-Polymer battery charger
with dual programmable constant current set.
By integrating high voltage input protection into
the charger IC, the MP26056 can tolerate an
input surge up to 28V.
The device features constant current (CC) and
constant voltage (CV) charging modes, reverse
current blocking and trickle charge. Other
features include the programmable battery full
threshold supporting dual AC/USB input by
automatically changing to a lower charge
current when the USB is the power supply. The
MP26056 also provides ACOK and charge
status indications to the system.
For guaranteed safe operation, the MP26056
limits the die temperature to a preset value
when the device is heated up due to limited
PCB space. Other safety features include
battery
programmable timer to prevent prolonged
charging a dead battery.
MP26056 is available in 10-pin 3mm x 3mm
QFN packages.
MP26056 Rev. 0.91
3/30/2009
TYPICAL APPLICATION
SHDN
MOD
GND
3.5~6.5
VIN
temperature
MPS Proprietary Information. Unauthorized Photocopy and Duplication Prohibited.
LED1
Red
monitoring
LED2
Green
5
1
2
3
4
© 2009 MPS. All Rights Reserved.
CHG
ACOK
VIN
MOD
GND
MP26056
www.MonolithicPower.com
U1
and
ISET2
ISET1
SHDN
BAT
IBF
10
9
7
6
8
28V, Li+Single-Cell Battery Charger
FEATURES
APPLICATIONS
“MPS” and “The Future of Analog IC Technology” are Registered Trademarks of
Monolithic Power Systems, Inc.
Complete Solution for Charging Single-Cell
Lion-Ion Battery
Input Surge Up to 28V
Dual USB/AC-Adapter Input with Auto
Charge-Current Control
Wide input operating range 3.5V to 6.5V
7V Input Over-Voltage Protection
Programmable Charge Current: 200mA to 1A
80µA Idle Current with USB Input
0.75% V
<1µA Battery Reverse Current
Automatic die temperature limiting
Fault and Charge Status Indicators
Internal Soft-Start to limit inrush current
Tiny 3mm x 3mm QFN Package
Cell Phones
Digital Cameras
Smart Phones
PDAs
MP3 Players
with USB/AC-Adapter Input
BATT
Accuracy over Temperature
MP26056
GND
BAT
1

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MP26056 Summary of contents

Page 1

... PCB space. Other safety features include battery temperature monitoring programmable timer to prevent prolonged charging a dead battery. MP26056 is available in 10-pin 3mm x 3mm QFN packages. TYPICAL APPLICATION 3.5~6.5 VIN GND LED1 Red ...

Page 2

... Part Number* MP26056DQ (3mm x 3mm) Temperature Top Marking –40°C to +85°C * For Tape & Reel, add suffix –Z (e.g. MP26056DQ–Z) For RoHS compliant packaging, add suffix –LF (e.g. MP26056DQ–LF–Z) ELECTRICAL CHARACTERISTICS +25°C, unless otherwise noted. IN ...

Page 3

... MP26056- 28V, LI+SINGLE-CELL BATTERY CHARGER WITH USB/AC-ADAPTER INPUT ELECTRICAL CHARACTERISTICS +25°C, unless otherwise noted Parameter Symbol Condition Battery Full Programming I Range IBF Accuracy Input ACOK Up Range Input ACOK Up Range Hysteresis Input ACOK Low Range Input ACOK Low Range ...

Page 4

... MP26056- 28V, LI+SINGLE-CELL BATTERY CHARGER WITH USB/AC-ADAPTER INPUT PIN FUNCTIONS Pin # Name Description 1 IN Input Supply Pin. IN receives the AC adapter or USB supply voltage. 2 Open-Drain OVP Indicator. This pin is low when 3.5V < V ACOK Open-Drain Charge Indicator. This pin is low during charging, is High after battery full or ...

Page 5

... MP26056- 28V, LI+SINGLE-CELL BATTERY CHARGER WITH USB/AC-ADAPTER INPUT TYPICAL PERFORMANCE CURVES C =4.7uF, C =2.2uF, V =5V OUT IN AC Adapter Input Charge Curve 900 4.5 800 4.0 V BAT 700 3.5 I 600 3.0 CHG 500 2.5 V STATUS 400 2.0 300 1.5 200 1.0 100 0 120 160 200 TIME (Min) ...

Page 6

... MP26056- 28V, LI+SINGLE-CELL BATTERY CHARGER WITH USB/AC-ADAPTER INPUT TYPICAL PERFORMANCE CURVES (continued) C =4.7uF, C =2.2uF, V =5V OUT IN 570 560 550 540 530 520 - 110 V =0.78V 5V/div 2V/div. V BAT 5V/div. I CHG 0.5A/div 5V/div. V CHG 5V/div. V BAT 2V/div ...

Page 7

... IC is also disabled to prevent the battery from draining. Charge Cycle (Mode Change CV) Figure 2 below shows the typical charging profile for the MP26056. The MP26056 will start with the Constant Current charge of the programmed value (I ) based This is referred to as ...

Page 8

... MP26056- 28V, LI+SINGLE-CELL BATTERY CHARGER WITH USB/AC-ADAPTER INPUT Charge Status Indicator (CHG) The MP26056 has an integrated charge status pin that remains low while the battery is charging. Once the charge current has reduced to the battery full charge current threshold (I CHG pin will become high impedance. ...

Page 9

... MP26056- 28V, LI+SINGLE-CELL BATTERY CHARGER WITH USB/AC-ADAPTER INPUT Charge termination in USB mode The charge current will gradually decrease in CV mode as the battery approaches full. The battery full threshold can be programmed by connecting a resistor from IBF pin to ground. When the charge current reaches this threshold, the charger current will be turned off ...

Page 10

... MOD “High” Termination NO YES V <4.0V? BAT MP26056 Rev. 0.91 3/30/2009 MPS Proprietary Information. Unauthorized Photocopy and Duplication Prohibited. Modes of the MP26056 CVC and CCC stand for “constant voltage charge” and “constant current charge”, respectively. POR V > Charging Set up? CHG LED “ON” ...

Page 11

... MP26056- 28V, LI+SINGLE-CELL BATTERY CHARGER WITH USB/AC-ADAPTER INPUT PACKAGE INFORMATION 2.90 3.10 PIN 1 ID MARKING PIN 1 ID INDEX AREA TOP VIEW 0.20 REF SIDE VIEW 2.90 0.70 1.70 0.25 0.50 RECOMMENDED LAND PATTERN NOTICE: The information in this document is subject to change without notice. Users should warrant and guarantee that third party Intellectual Property rights are not infringed upon when integrating MPS products into any application ...

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