BQ25713 datasheet(69/111 Pages) TI2

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8.6.14 ProchotOption0 Register (I2C address = 37/36h) [reset = 4A81h(2S~5s) 4A09(1S)]

To set VSYS_TH1 threshold to trigger discharging VBUS in VAP mode, write a 6-bit VSYS_TH1 register

command (REG0x36<7:2>()) using the data format listed in Figure 8-29, Table 8-34, and Table 8-35. The

charger Measure on VSYS with fixed 5-µs deglitch time. Trigger when SYS pin voltage is below the thresholds.

The threshold range from 3.2 V (000000b) to 9.5 V (111111b) for 2s~5s and 3.2 V (000000b) to 3.9 V (000111b)

for 1S, with 100-mV step resolution. There is a fixed DC offset which is 3.2 V. Under 1S application writing

beyond 3.9 V will be ignored. For example 000111b and xxx111b result in same VSYS_TH1 setting 3.9 V. Upon

POR, the VSYS_TH1 threshold to trigger VBUS discharge in VAP mode is 3.4 V (000010b) for 1S and 6.400 V

(100000b) for 2s~5s.

Figure 8-29. ProchotOption0 Register (I2C address = 37/36h) [reset = 4A81h(2S~5s) 4A09(1S)]

ILIM2_VTH

ICRIT_DEG

PROCHOT_VI

NDPM_80_90

R/W

VSYS_TH1

INOM_DEG

LOWER_PRO

CHOT_VINDP

R/W

LEGEND: R/W = Read/Write; R = Read only; -n = value after reset

Table 8-34. ProchotOption0 Register (I2C address = 37h) Field Descriptions

BIT

FIELD

TYPE

RESET

DESCRIPTION

7-3

ILIM2_VTH

R/W

01001b

ILIM2 Threshold

5 bits, percentage of IIN_DPM in 0x25/24. Measure current between ACP and

ACN.

Trigger when the current is above this threshold:

00001b - 11001b: 110% - 230%, step 5%

11010b - 11110b: 250% - 450%, step 50%

11111b: Out of Range (Ignored)

Default 150%, or 01001

2-1

ICRIT_DEG

R/W

01b

ICRIT Deglitch time

ICRIT threshold is set to be 110% of ILIM2.

Typical ICRIT deglitch time to trigger PROCHOT.

00b: 15 µs

01b: 100 µs <default at POR>

10b: 400 µs (max 500 μs)

11b: 800 µs (max 1 ms)

PROCHOT_VINDPM_

80_90

R/W

Lower threshold of the PROCHOT_VINDPM comparator

When REG0x36[0]=1, the threshold of the PROCHOT_VINDPM comparator is

determined by this bit setting.

0b: 83% of VinDPM threshold <default at POR>.

1b: 91% of VinDPM threshold

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BQ25730

SLUSE65A – FEBRUARY 2021 – REVISED JANUARY 2024

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