Datasheet
MCP1630 Low-Cost NiMH Battery Charger Reference Design
DS51648A-page 8 © 2007 Microchip Technology Inc.
2.3 GETTING STARTED
The MCP1630 Low-Cost NiMH Battery Charger is fully assembled and tested for
charging three series cell NiMH batteries. The charge termination is based on a
negative slope in battery voltage or a positive slope in battery pack temperature, (when
external thermistor is installed). This board requires the use of an external voltage
source to charge the series connected batteries with a range of +6V to +14V input. An
external load and thermistor is also required to evaluate the charger reference design.
FIGURE 2-1: MCP1630 Low-Cost NiMH Battery Charger Reference Design
Charge Profile.
2.3.1 Power Input and Output Connection
2.3.1.1 POWERING THE MCP1630 LOW-COST NIMH BATTERY CHARGER
1. Apply the input voltage to the input terminal block, J1. The input voltage source
should be limited to the 0V to +14V range. For nominal operation the input
voltage should be between +6V and +14V.
2. Connect the positive side of the input source (+) to pin 1 of J1. Connect the
negative or return side (-) of the input source to pin 2 of J1. Refer to Figure 2-2.
0.0
1.0
2.0
3.0
4.0
5.0
6.0
0
5
10
15
20
25
30
35
40
45
50
55
60
65
70
75
Time (Minutes)
Battery Voltage (V)
Charge Current (A)
0
10
20
30
40
50
60
Temperature (C)