Texas Instruments BQ24055 Evaluation Module: 0.8-A, Single-Input, Single-Cell Li-Ion Battery Charger BQ24052EVM BQ24052EVM 데이터 시트
제품 코드
BQ24052EVM
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Test Summary
4.1
Equipment
•
Power supply +5.1 ±0.1 V, current limit set to 1.5 ±0.1 A
•
Battery: 4.2 V LiCoO2 or equivalent
•
Two Fluke 75 DMMs (equivalent or better)
•
Oscilloscope, Model TDS220 (equivalent or better)
4.2
Equipment and EVM Setup
Jack/Component
Connect or Adjustment To:
J1-DC+
Power supply positive, preset to 5 VDC, 1-A current limit.
J1-DC–
Power supply ground
J2-BAT+
Positive Battery Pack Terminal
J2-BAT–
Negative Battery Pack Terminal
JMP1
Apply shunt between IN_IC and DC+; allows use of J1 input.
JMP2
Apply shunt for Pre-Term connection.
JMP3
Remove shunt for USB100 mode operation.
JMP4
Apply shunt for CHG LED connection.
JMP5
Apply shunt for TS potentiometer connection.
JMP6 (bq24050/2)
Apply shunt to simulate an adaptor connection when using J1 as an input.
JMP6 (bq24055)
Apply shunt for PG LED connection.
JMP7 (bq24055)
Apply shunt to simulate an adaptor connection when using J1 as an input.
R2 (R
ISET
)
Adjust R2 for 1k between TP2 and GND
R4 (R
PRE-TERM
)
Adjust R3 for 2k between TP4 and GND
R8 ( R
TS
)
Adjust R11 for 10k between TP9 and GND
Figure 1. bq24050/2/5 Setup Schematic
4.3
Test Procedure Using a Single Cell Li-Ion Battery
1. Connect one DMM across the BAT+ to BAT– connection at J2. Since this is a linear charger the output
current display on the input power supply is approximately the current delivered to the OUT pin. The
charge current may be monitored independently by placing a 100m
charge current may be monitored independently by placing a 100m
Ω
resistor in the battery pack return
and using a DMM to monitor the sense resistor.
3
SLUU378 – September 2009
0.8-A, Single-Input, Single-Cell Li-Ion Battery Charger
Copyright © 2009, Texas Instruments Incorporated