MPS MP2631 User manual

EV2631DQ-00A
28V, 1A, Linear Li-lon Battery Charger
with A 10mA High Voltage LDO EV Board
EV2631DQ-00A Rev. 1.0 www.MonolithicPower.com 1
12/25/2013 MPS Proprietary Information. Unauthorized Photocopy and Duplication Prohibited.
© 2013 MPS. All Rights Reserved.
The Future of Analog IC Technology
DESCRIPTION
The MP2631 is a linear, high performance
single cell Li-Ion or Li-Polymer battery charger
with 10mA LDO and on-chip input polarity
reverse protection. By integrating high voltage
input protection into the charger IC, the
MP2631 can tolerate an input surge up to 28V
and input surge down to -16V.
The MP2631 features constant current (CC)
and constant voltage (CV) charging modes with
programmable charge current (200mA to 1A)
reverse current blocking and trickle charge.
The other features include the internally set
battery full threshold (10% of the programmed
charge current) and auto-recharge.
The OVP circuitry will automatically disconnect
both charger and LDO from input when VIN
exceeds 7V.
ELECTRICAL SPECIFICATION
Parameter Symbol Value Units
Input Voltage VIN 4.5V – 6.5V V
Charge Current ICHG 0.2-1.0 A
LDO VO5 V
FEATURES
Input Surge Up to 28V
5V LDO output
Wide input operating range 3.0V – 7V
Programmable Charge Current: 200mA to
1A
Termination and auto-recharge
0.75% VBATT Accuracy over Temperature
<1µA Battery Reverse Current
Automatic die temperature limiting
Fault and Charge Status Indicators
Soft-Start to limit inrush current
Tiny 3mm x 3mm QFN Package
APPLICATIONS
Cell Phones
Digital Cameras
Smart Phones
PDAs
MP3 Players
“MPS” and “The Future of Analog IC Technology” are Registered Trademarks of
Monolithic Power Systems, Inc.
EV2631DQ-00A EVALUATION BOARD
Board Number MPS IC Number
EV2631DQ-00A MP2631DQ
AC Adapter Input Charge Curve
0
100
200
300
400
500
600
700
800
900
0 20406080100120140
0.0
0.5
1.0
1.5
2.0
2.5
3.0
3.5
4.0
4.5

EV2631DQ-00A –28V, 1A LINEAR LI-ION BATTERY CHARGER WITH A 10MA HIGH VOLTAGE LDO
EV2631DQ-00A Rev. 1.0 www.MonolithicPower.com 2
12/25/2013 MPS Proprietary Information. Unauthorized Photocopy and Duplication Prohibited.
© 2013 MPS. All Rights Reserved.
EVALUATION BOARD SCHEMATIC
MP2631
BATT
SS
GND
10
9
47
6
IN
CHG
ACOK
SHDN
ISET
LDO
NC
1
2
3
5
8
VIN
VIN
GND
GND
ACOK
CHG
SHDN
LDO
BAT
BAT
GND
GND
JP1 JP2 JP3
LED1
Green
LED2
Red
U1
4.5V to 6.5V 5V@10mA
EV2631DQ-00A BILL OF MATERIALS
Qty Ref Value Description Package Manufacturer Manufacturer P/N
1 C1 4.7uF Ceramic Cap., 35V, X7R 1210 Murata GRM32ER71H475KA88L
2 C2, C6 0.1uF Ceramic Cap., 16V, X7R 0603 TDK C1608X7R1C104K
2 C3, C5 NS 0603
1 C4 2.2uF Ceramic Cap., 16V, X7R 1210 Murata GRM32MR71C225MC01L
3 JP1, 2,
3 3x2-Pin Connector Header, 0.100" Molex 10-89-1601
1 LED1 Led Green, Surface Mount 0603 Lumex SML-LX0603GW-TR
1 LED2 Led Red, Surface Mount 0603 Lumex SML-LX0603IW-TR
2 R1, R2 1kΩFilm Res., 5% 0603 Yageo 9C06031A1001FKHFT
1 R3 1.96kΩFilm Res., 1% 0603 Yageo 9C06031A1961FKHFT
1 R4 3.09kΩFilm Res., 1% 0603 Yageo 9C06031A3091FKHFT
1 R5 7.68kΩFilm Res., 1% 0603 Yageo 9C06031A7681FKHFT
1 R6 NS Not Stuffed 0603
1 U1 Linear Charger QFN10 MPS MP2631DQ

EV2631DQ-00A –28V, 1A LINEAR LI-ION BATTERY CHARGER WITH A 10MA HIGH VOLTAGE LDO
EV2631DQ-00A Rev. 1.0 www.MonolithicPower.com 3
12/25/2013 MPS Proprietary Information. Unauthorized Photocopy and Duplication Prohibited.
© 2013 MPS. All Rights Reserved.
PRINTED CIRCUIT BOARD LAYOUT
Figure 1—Top Silk Layer Figure 2—Top Layer
Figure 3—Bottom Layer

EV2631DQ-00A –28V, 1A LINEAR LI-ION BATTERY CHARGER WITH A 10MA HIGH VOLTAGE LDO
NOTICE: The information in this document is subject to change without notice. Please contact MPS for current specifications.
Users should warrant and guarantee that third party Intellectual Property rights are not infringed upon when integrating MPS
products into any application. MPS will not assume any legal responsibility for any said applications.
EV2631DQ-00A Rev. 1.0 www.MonolithicPower.com 4
12/25/2013 MPS Proprietary Information. Unauthorized Photocopy and Duplication Prohibited.
© 2013 MPS. All Rights Reserved.
QUICK START GUIDE
The output voltage on this board is preset to 4.2V (for a single cell battery). The board
layoutaccommodates most commonly used capacitors.
The LEDs are power indicators. When LED1 is on, the 5V input is present (LED1 is off when the input
is disconnected). When LED2 is on, the battery is charging, and when the battery is full or there is no
battery connected, LED 2 will turn off.
1. Set the charge current ICHG using the jumpers JP1, JP2, and JP3 per the following table:
JP1 JP2 JP3 ICHG
X X 1000mA
X 800mA
X X 700mA
X 500mA
X 200mA
Where “X” indicates a connection.
2. Attach the positive and negative ends of the load to the VOUT and GND pins, respectively.
3. Attach the input voltage (VIN=4.5V) and the input ground to the VIN and GND pins, respectively.
4. LDO; is a Output with maximum load current 10mA.
5. Set the battery charge current ICHG should be follow under equation:
CHG
CHG RkA
I)55.11



Where the RCHG are R3, R4 and R5