BQ24196_17 Datasheet, PDF(26/50 Page) Texas Instruments – I2C Controlled 2.5-A Single Cell USB/Adapter Charger with Narrow VDC Power Path Management and USB OTG

English

English German Russian Spanish Italian Polish Chinese Japanese Korean French Portuguese	Language :

BQ24196_17 Datasheet, PDF (26/50 Pages) Texas Instruments – I2C Controlled 2.5-A Single Cell USB/Adapter Charger with Narrow VDC Power Path Management and USB OTG

◁

bq24196

SLUSB98A â OCTOBER 2012 â REVISED DECEMBER 2014

Device Functional Modes (continued)

POR

watchdog timer expired

Reset registers

I2C interface enabled

www.ti.com

I2C Write?

Default Mode

Reset watchdog timer

Reset registers

Host Mode

Start watchdog timer

Host programs registers

Reset REG01

bit[6]?

I2C Write?

Watchdog Timer

Expired?

Figure 24. Watchdog Timer Flow Chart

8.4.1.1 Plug in USB100mA Source with Good Battery

When the input source is detected as 100-mA USB host, and the battery voltage is above batgood threshold

(VBATGD), the charger device enters HIZ state to meet the battery charging spec requirement.

If the charger device is in host mode, it will stay in HIZ state even after the USB100-mA source is removed, and

the adapter plugs in. During the HIZ state, REG00[7] is set HIGH and the system load is supplied from battery. It

is recommended that the processor host always checks if the charger IC is in HIZ state when it wakes up. The

host can write REG00[7] to 0 to exit HIZ state.

If the charger is in default mode, when the DC source is removed, the charger device will get out of HIZ state

automatically. When the input source plugs in again, the charger IC runs detection on the input source and

update the input current limit.

8.4.1.2 USB Timer when Charging from USB 100-mA Source

The total charging time in default mode from USB 100-mA source is limited by a 45-min max timer. At the end of

the timer, the device stops the converter and goes to HIZ.

8.5 Register Map

REG00

REG01

REG02

REG03

REG04

REG05

REG06

REG07

REG08

REG09

REG0A

Table 6. Register Map

Input Source Control Register

Power-On Configuration Register

Charge Current Control Register

Pre-Charge/Termination Current Control Register

Charge Voltage Control Register

Charge Termination/Timer Control Register

Thermal Regulation Control Register

Misc Operation Control Register

System Status Register

Fault Register

Vender / Part / Revision Status Register

RESET

00110000, or 30

00011011, or 1B

01100000, or 60

00010001, or 11

11001010, or CA

10011010, or 9A

00000011, or 03

01001011, or 4B

Submit Documentation Feedback

Product Folder Links: bq24196

▷