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| BQ25070 Datasheet, PDF (5/21 Pages) Texas Instruments – 1A, Single-Input, Single-Cell LiFePO4 Linear Battery Charger with 50mA LDO | |||
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www.ti.com
TYPICAL CHARACTERISTICS
VIN = 5 V, VBAT = 3.2 V, ICHG = 280 mA, Typical Application Circuit
bq25070
SLUSA66 â JULY 2011
VIN
VLDO
IOUT
VCHG
5V/div
5V/div
VCTRL
VLDO
200mA/div
IOUT
2V/div
VCTRL = 0V
20ms/div
G001
Figure 1. Adapter Plug-In With Battery Connected
VCHG
5V/div
5V/div
200mA/div
2V/div
10ms/div
G002
Figure 2. Charger Enable Using CTRL
VCTRL
VLDO
IOUT
VCHG
5V/div
5V/div
200mA/div
VCTRL
2V/div
IOUT
400μs/div
G003
Figure 3. Charger Disable Using CTRL
2V/div
500mA/div
4ms/div
G004
Figure 4. Default to 1A Transition Using CTRL
VIN = 5V to 12V
VIN
VLDO
IOUT
VCHG
40μs/div
Figure 5. OVP Fault
5V/div
5V/div
1A/div
2V/div
G005
Copyright © 2011, Texas Instruments Incorporated
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