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DA9072

Ultra-Low Quiescent Current PMIC

Datasheet

Revision 3.0

14-Jun-2021

CFR0011-120-00

33 of 113

10 ms

TEMP_SNS

update

VTEMP active

2C Trigger

TEMP_SNS active

TEMP_SNS

update

Host Controlled Mode

10 ms

TEMP_SNS

update

50 ms

10 ms

TEMP_SNS

update

VTEMP active

Auto-mode Period

TEMP_SNS active

TEMP_SNS

update

Active Power (Charging)

50 ms

2 s

10 ms

TEMP_SNS

update

VTEMP active

Auto-mode Period

TEMP_SNS active

TEMP_SNS

update

Active Battery (Discharging)

2 s

Figure 22: Battery Temperature Sense Timing

4.3

Analog Battery Monitor Functions

DA9072 incorporates two features to support accurate fuel gauging: battery discharge current

monitor (IMON) and battery voltage (VBAT_DIV). These provide analog discharge current and

battery voltage information scaled for compatibility with typical ADC inputs.

CAUTION

Filter capacitors on IMON and VBAT_DIV should not be used, or should be minimized, in order to minimize

any time lag when using these outputs for fuel gauging.

4.3.1

Battery Discharge Current Monitoring

The IMON function sources a current proportional to the battery discharge current at a 1 mA/A scale.

An external resistor from pin IMON to GND should be selected to optimize the dynamic range based

on battery current range and maximum tolerance of both DA9072 and the ADC inputs. To maintain

accuracy, a maximum voltage of 1.4 V is allowed at the IMON pin.

The IMON function is enabled and disabled by bit IDISCHG_MON_EN (register 0x002A [1]). When

enabled, the function draws an additional 4 µA of quiescent current from VBAT.

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