MCP73833 Li-Ion Battery Charger Evaluation Board User’s Guide
DS51626A-page 8
©
2006 Microchip Technology Inc.
2.3
GETTING STARTED
The MCP73833 Li-Ion Battery Charger Evaluation Board has one circuit fully
assembled and tested for charging single cell, Li-Ion/Li-Polymer battery packs. The
board provides the appropriate charge algorithm for simple, stand-alone operation.
The board requires the use of an external input voltage source (5V ±10%,
recommended) and external load (battery pack or simulated battery load).
2.3.1
Power Input and Output Connections
2.3.1.1
POWERING THE MCP73833 LI-ION BATTERY CHARGER EVALUATION
BOARD
1. Apply the input voltage source to the appropriate circuit for evaluation. The input
voltage source should be limited to the 0V to +6V range. For normal operation,
the input voltage should be b4.5V and +6V. The input voltage must not
exceed an absolute maximum of +7V.
2. Connect the positive side of the input source (+) to VDD of the circuit being
evaluated. Connect the negative or return side of the input source (-) to VSS of
the circuit being evaluated. Refer to
FIGURE 2-1:
Setup Configuration Diagram.
2.3.1.2
APPLYING THE LOAD TO THE MCP73833 LI-ION BATTERY CHARGER
EVALUATION BOARD
1. To apply a load to the MCP73833 Li-Ion Battery Charger Evaluation Board, the
positive side of the load (B+) should be connected to VBAT of the circuit being
evaluated. The negative or return side of the load (B-) should be connected to
VSS of the circuit being evaluated. Care should be taken when using electronic
loads or ground referenced loads.
2. For the MCP73833-FCI/MF installed device, the charge management controller
will only provide 10% of the programmed fast charge current if the battery termi-
nal voltage (VBAT) is less than 3.0V with respect to VSS. Using a purely resistive
D5
R4
R8
D3
R1 1
D2
D6
R1
R6
TP 5
TP 3
TP 1
D4
R9
TP 6
R3
R7
TP 4
U1
TP 2
TP 7
C3
C4
R1 0
R1 2 R1 3
R1 4
TP 8
U2
C1
C2
D1
R2
R5
Battery Pack
or
Simulated
Battery Load
+
_
Input
Power
Supply
+
_
