DA9072 datasheet(42/113 Pages) DIALOG

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DA9072

Ultra-Low Quiescent Current PMIC

Datasheet

Revision 3.0

14-Jun-2021

CFR0011-120-00

42 of 113

A fault triggered power cycle also disables VDD_SYS, creating a complete power system restart (a

host or user-initiated power cycle does not disable VDD_SYS).

Table 29: Power Cycle Faults

Power Cycle Fault

Triggers

0x0013

I2C Selectable

Battery Temp Sense HOT

YES

Thermal Shutdown (OVT)

Always On

YES

VBAT UVLO (in Active

Battery mode)

Always On

YES

VDD_SYS UVLO

Always On

YES

There are also three power cycle faults associated with the buck, listed in Table 30. Any of these

faults cause an immediate power cycle. Buck faults do not re-load the OTP register values and only

the buck restarts after a buck fault power cycle.

Table 30: BUCK Power Cycle Faults

Power Cycle Fault

Triggers

0x0013

I2C Selectable

BUCK OCP

YES

BUCK OVP

Always On

BUCK UVP

YES

4.7

Standalone Mode

The DA9072 can operate without I2C communication using external resistors to program three

settings. Fast charge current, input current limit, and termination and pre-charge current can be set

by external resistors at the ITER_CHG, ILIM_PWR and ILIM_CHG pins, respectively.

This feature is enabled by the RMEAS_EN bit (register 0x0020 [1]). Whenever VDD_PWR is

plugged-in, these three external resistors are evaluated and the control registers are set

appropriately. If the pins are connected to ground the internal register values are used.

If used, all three resistors must be installed. If any of the three pins are grounded all three currents

are determined by their respective register values.

The specification of RMEAS_EN register is described in Table 31.

Table 31: Enabling External Resistor Setting Mode

RMEAS_EN

(0x0020 [1])

External Resistance [

Ω]

Setting

N/A

> 0

Calculated from external resistance

4.7.1

Termination and Pre-Charge Current Programming

The pre-charge (ICHG_PRE) and termination (ITER) currents are the same value and set with the same

resistor. When using the external resistor setting method, they can be set to 5 %, 10 %, 15 %, or

20 % of the fast charge current, ICHG.

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