EV26124-R-00A – 600kHz 2A SWITCHING LI-ION BATTERY CHARGER EV BOARD

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.

EV26124-R-00A Rev. 1.2

www.MonolithicPower.com

5

11/8/2018

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QUICK-START GUIDE

This board is used for the MP26124 application of standalone switching chargers, which can charge

four Li-ion batteries. The board layout accommodates the most commonly used capacitors.

The two LEDs are operating status indicators. When the input is sufficient for charging the battery load,

the ACOK LED is on; otherwise, it is off. When the charging operation is normal, the CHGOK LED is on.

If any event occurs including battery full, NTC fault, timer out, thermal protection, or EN disable,

CHGOK LED turns off.

Particularly, CHGOK LED will be twinkling if BATT is floated.

Follow the steps below to quick-start the board.

1. Charge current setting:

The charge current can be programmed by the sense resistor R4 with Equation (1):



mΩ

R4

200mV

(A)

I

CHG



(1)

2. Preset the power supply output to 24V and then turn it off. Attach the positive and negative ends of

the power supply output to the VIN and GND pins, respectively.

3. Attach the positive and negative ends of the battery to the BATT and GND pins, respectively.

4. Turn the power supply on. The board starts up automatically if EN is pulled to GND.

5. To use the enable function, apply a digital input to the EN pin. Drive EN above 1.8V to turn off the

charger. Drive EN below 0.4V to turn on the charger.

Refer to the MP26124 datasheet for further detailed information.