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DA9131

High-Performance, Dual-Channel DC-DC Converter for

Mobile and Portable Applications

Datasheet

Revision 2.0

11-Aug-2021

CFR0011-120-00

21 of 56

4.1.7

Thermal Protection

DA9131 is protected from internal overheating by thermal shutdown.

There are two kinds of flags concerning thermal protection, thermal warning and thermal critical. The

warning flag is asserted when TJ > TWARN and the critical flag is asserted when TJ > TCRIT. When the

critical flag is asserted, Buck1 and Buck2 are shut down immediately.

Table 12: Thermal Protection Control Registers

Category

Description

Status

TEMP_WARN

Asserted as long as the thermal warning threshold is reached

TEMP_CRIT

Asserted as long as the thermal shutdown threshold is reached

IRQ event

E_TEMP_WARN

TEMP_WARN caused event

E_TEMP_CRIT

TEMP_CRIT caused event

IRQ mask

M_TEMP_WARN

TEMP_WARN event IRQ mask

M_TEMP_CRIT

TEMP_CRIT event IRQ mask

M_VR_HOT

TEMP_WARN status IRQ mask

Figure 10: Thermal Protection Operation

4.2

Internal Circuits

4.2.1

IC_EN/Chip Enable/Disable

IC_EN is chip enable/disable control input. When IC_EN = 0, all blocks except for low IQ POR are

powered-down and buck output is pulled-down.

4.2.2

nIRQ/Interrupt

The interrupt triggers events. Trigger conditions and control registers for each interrupt event are

listed in Table 13.

Warning Flag

TCRIT

Junction

Temperature

TWARN

Critical Flag

IRQ

Buck1 and Buck2 Shutdown

Buck Enable

I2C Bus

Write

to CH<x>_EN

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