EV2681B-S-00A
—
CC/CV CONTROLLER WITH FULL PROTECTION EVAL. BOARD
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. MPS will not
assume any legal responsibility for any said applications.
EV2681B-S-00A Rev. 1.0
www.MonolithicPower.com
8
8/4/2016
MPS Proprietary Information. Patent Protected. Unauthorized Photocopy and Duplication Prohibited.
© 2016 MPS. All Rights Reserved.
QUICK START GUIDE
The MP2681B is a voltage and current control IC integrated a precision voltage reference and charge
status indications, which is suitable for AC adapter input in the plug-in, cradle charger applications.
The device automatically detects the battery cell numbers through the battery ID resistor and regulates
the battery voltage according to the cell information: 3S, 4S, and 5S.
ID Resistor
Detect Voltage
Operation
Mode
Battery
Spec
VDD VBATT
Float
NTC
Float
V
ID
> 2.65V
Sleep Mode
No Battery
10.8V
0
NTC OK
Default Mode
3S
12.44V
12.44V
1.8k
0.3V < V
ID
< 0.7V
Automatic Mode
3S 12.44V
12.44V
6.8k
0.95V < V
ID
< 1.6V
4S
16.59V
16.59V
15k
1.75V < V
ID
<
2.65V
5S 20.74V
20.74V
Short V
ID
< 0.3V
Sleep Mode
Unknown
10.8V
0
1. The charge current is set to 3A as the below formula in this board,
I
CHG
= 0.16/RS = 3A
Note: the reference voltage 0.16V has a +-15% variation.
2. In this board, there are two LEDs controlled by the MP2681B to work as smart charger status
indicators.
a) During the charging, LEDG flashes. At the same time, LEDR keeps off.
b) When the charging is finished, LEDG keeps on and LEDR is off.
c) When fault protection happens, LEDR flashes and LEDG keeps off.
3. Attached the AC Line (85~220V) terminals to L and N pins, respectively.
4. Connect the positive terminal of the battery to BATT+ pin, and connect the negative terminal of the
battery to BATT- pin, respectively.
5. Turn the power supply on. The board automatically startup.
6. The output voltage on this board is determined by voltage at the ID pin.
For more details, please apply the latest datasheet of the MP2681B for reference.
