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DA9072 Datasheet(PDF) 33 Page - Dialog Semiconductor

Part # DA9072
Description  Ultra-Low Quiescent Current PMIC
PDF  113 Pages
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Manufacturer  DIALOG [Dialog Semiconductor]
Direct Link  http://www.dialog-semiconductor.com/
Logo DIALOG - Dialog Semiconductor

DA9072 Datasheet(HTML) 33 Page - Dialog Semiconductor

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DA9072
Ultra-Low Quiescent Current PMIC
Datasheet
Revision 3.0
14-Jun-2021
CFR0011-120-00
33 of 113
© 2021 Dialog Semiconductor
10 ms
10 ms
TEMP_SNS
update
VTEMP active
I
2C Trigger
TEMP_SNS active
TEMP_SNS
update
Host Controlled Mode
10 ms
TEMP_SNS
update
50 ms
10 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
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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