EV2637A-R-00A –2.5A SINGLE-CELL SWITCH MODE BATTERY CHARGER
EV2637A-R-00A Rev. 1.0
www.MonolithicPower.com
7
10/11/2019
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EQUIPMENT REQUIREMENT
Evaluation requires the following equipments:
1. DC power source. The output voltage should exceed 6.0V, and output current greater than
2.5A.
2. Battery simulator or a single-cell battery pack. The battery simulator
’s output rating should
exceed 4.5V/3.0A. When using a real battery pack, please observe all precautions on the
battery manufacturer’s data sheet first and ensure the charger’s setting doesn’t exceed the
battery’s absolute maximum specifications.
3. An oscilloscope. A single voltage probe and a single current probe.
4. Multi-meter.
Charge Function
1
Connect the jumper “EN” to “H” and the “MODE” to “L” to shunts, respectively!
2
Attach the positive and negative ends of the battery to the “BATT” and “GND” terminals,
respectively. If it’s a battery simulator, please preset the voltage to 3.8V (typical value) first.
3 Preset the DC power source to 5.0
V. Then attach the DC output port and ground to the “VIN”
and “GND” terminals, respectively.
4 Turn on the DC power source. The charger will start. Use the oscilloscope to verify that the 2.5A
charge current is being delivered to the battery.
5
Remove the shunt between the “EN” and “H” to disable charging.
6 Re-
insert the shunt between the “EN” and “H” to enable charging.
U1
MAIN CIRCUIT
EV2637A-R-00A
GND
VIN
BATT
GND
1-Cell
Battery Pack
or Simulator
DC
Power
Supply
VB
LED2
LED3
SYS
VCC
NTC
GND
BATT
JP1
JP2
JP3
EN
MODE
H
L
L
LED1
H
L
H
LED
JP4
VCC
SYS
Figure 4: Setup for Charge Mode