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| BQ24190_15 Datasheet, PDF (39/52 Pages) Texas Instruments – bq2419x I2C Controlled 4.5-A Single Cell USB/Adapter Charger with Narrow VDC Power Path Management and USB OTG | |||
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www.ti.com
bq24190, bq24192, bq24192I
SLUSAW5B â JANUARY 2012 â REVISED DECEMBER 2014
The charger device has internal loop compensator. To get good loop stability, the resonant frequency of the
output inductor and output capacitor should be designed between 15 kHz and 25 kHz. With 2.2-µH inductor, the
typical output capacitor value is 20 µF. The preferred ceramic capacitor is 6 V or higher rating, X7R or X5R.
10.2.3 Application Performance Plots
VBUS
5V/div
REGN
5V/div
SYS
2V/div
IIN
200mA/div
100ms/div
VBAT 3.2 V
Figure 40. bq24190 Power Up from USB100 mA
VBUS
5V/div
REGN
5V/div
SYS
2V/div
IBAT
2A/div
100ms/div
Figure 42. bq24192 Power Up with Charge Enabled
STAT
2V/div
/CE
5V/div
SW
10V/div
IBAT
2A/div
4us/div
VBUS 12 V
Figure 44. Charge Disable
VBUS
5V/div
REGN
5V/div
SYS
2V/div
/PG
2V/div
40ms/div
VBAT 3.2 V
Figure 41. bq24192 Power Up with Charge Disabled
STAT
2V/div
/CE
5V/div
SW
5V/div
IBAT
1A/div
SYS
3.4V Offset
200mV/div
400us/div
VBUS 5 V
Figure 43. Charge Enable
IIN
2A/div
ISYS
2A/div
2ms/div
VBUS 5 V, IIN 3 A, Charge Disable
Figure 45. Input Current DPM Response without Battery
Copyright © 2012â2014, Texas Instruments Incorporated
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Product Folder Links: bq24190 bq24192 bq24192I
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