Microchip Technology MCP1630 NiMH, Руководство пользователя

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MCP1630 Low-Cost Battery Charger User’s Guide
DS51555A-page 8
©
2005 Microchip Technology Inc.
2.3 GETTING STARTED
The MCP1630 Low-Cost Li-Ion Battery Charger is fully assembled and tested for
charging single-cell, Li-Ion battery packs with the recommended charge profile for
Li-Ion batteries. This board requires the use of an external input voltage source (+6V
to +18V) and external load (battery or simulated battery load).
2.3.1 Power Input and Output Connections
2.3.1.1 POWERING THE MCP1630 LOW-COST LI-ION BATTERY CHARGER
1. Apply the input voltage to the input terminal block, J1. The input voltage source
should be limited to the 0V to +18V range. For normal operation, the input voltage
should be b6V and +18V. The input voltage must not exceed an
absolute maximum of +20V.
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 2-1.
FIGURE 2-1: Setup Configuration Diagram.
2.3.1.2 APPLY THE LOAD TO A BATTERY HEADER
1. To apply a load to the MCP1630 Low-Cost Li-Ion Battery Charger, the positive
side of the load (B+) should be connected to pin 1 of J2. The negative side of the
load (B-)should be connected to pin 5 of J2. Care should be taken when using
electronic loads or ground referenced loads.
2. A thermistor referenced to (B-) in the battery pack should be utilized. If a
thermistor is not available or not desired, a 10 k
Ω
resistor should be placed
between pins 4 and 5 of the battery header (J2).
3. The installed firmware will prevent the board from entering the 2A Fast Charge
mode if the battery terminal voltage is less than 3V. During power-up, the board
will always trickle charge first, so using a purely resistive load will not work for
trickle and fast-charge current. The best way to evaluate the charger is to use a
single-cell Li-Ion battery pack, or the recommended simulated battery load. Refer
to Figure 2-2.
C1
U2
C6 R7
R19 R18 R20C12
R8
R15
C7 C8
C13
R10
C14
C4
J3
U1
R1 R4
R17
D2
C9
R12
C5
R16
J1
C11
R6
R21
Q2
R9
R14
C3 C2 L1
R3
R2
J2
R13
R11
C10
R5
U3
U4
D1
Q1
Input +
Input –
Battery
Header
Programming
Header