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BQ24075RGTR

1.5-A USB-Friendly Li-Ion Battery Charger and Power-Path Management IC

Teccor Electronics 

bq24072, bq24073, bq24074, bq24075, bq24079

SLUS810L – SEPTEMBER 2008 – REVISED JUNE 2018

www.ti.com

Changes from Original (September 2008) to Revision A

Page

• Changed device Features. ..................................................................................................................................................... 1

• Changed Description. ............................................................................................................................................................. 1

• Changed Typical Application Circuit....................................................................................................................................... 1

• Changed description of CHG pin............................................................................................................................................ 7

• Changed SYSOFF Description............................................................................................................................................... 7

• Added Figure 34 through Figure 1. ...................................................................................................................................... 12

• Changed DETAILED FUNCTIONAL DESCRIPTION section. ............................................................................................. 15

• Changed the Simplified Block Diagram ................................................................................................................................ 16

• Changed text in section - STATUS INDICATORS (PGOOD, CHG) .................................................................................... 26

• Changed Table - CHG STATUS INDICATOR...................................................................................................................... 26

• Changed Equation 8 and Equation 9 .................................................................................................................................. 27

• Changed APPLICATION CIRCUITS section........................................................................................................................ 31

• Added Using bq24075 to Disconnect the Battery from the System, Figure 42.................................................................... 36

• Changed section - Half-Wave Adaptors ............................................................................................................................... 37

5 Description (continued)

Additionally, the regulated system input enables instant system turn-on when plugged in even with a totally

discharged battery. The power-path management architecture also lets the battery supplement the system

current requirements when the adapter cannot deliver the peak system currents, thus enabling the use of a

smaller adapter.

The battery is charged in three phases: conditioning, constant current, and constant voltage. In all charge

phases, an internal control loop monitors the IC junction temperature and reduces the charge current if the

internal temperature threshold is exceeded. The charger power stage and charge current sense functions are

fully integrated. The charger function has high accuracy current and voltage regulation loops, charge status

display, and charge termination. The input current limit and charge current are programmable using external

resistors.

4

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