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DA9131 Datasheet

R16DS0576EJ0300

Rev.03.00

July 18, 2025

CFR0011-120-00

Page 21

Figure 10. Thermal protection operation

5.2

Internal Circuits

5.2.1

IC_EN/Chip Enable/Disable

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

down and the buck output is pulled -down.

5.2.2

nIRQ/Interrupt

The interrupt triggers events. Trigger conditions and control registers f or each interrupt event are listed in

Table 13.

Some of these events are categorized as fault events and affect device operation (f or example, buck disable),

see section 5.1.7.

Table 13. Interrupt list

Name

Trigger

IRQ Status register

IRQ Mask register

Deglitch

period

Thermal

warning

(event)

TJ rising above TWARN

E_TEMP_WARN

M_TEMP_WARN

0 s

Thermal critical

(event)

TJ rising above TCRIT

E_TEMP_CRIT

M_TEMP_CRIT

0 s

System good

(event)

Buck1 power-good or Buck2

power-good event

E_SG

M_SG

0 s

Buck1 power-

good

(event)

Buck1 VOUT is in power-good

voltage range

(not under- or over-voltage)

E_PG1

M_PG1

0 s

Buck2 power-

good

(event)

Buck2 VOUT is in power-good

voltage range

(not under- or over-voltage)

E_PG2

M_PG2

0 s

Buck1

over-voltage

(event)

Buck1 VOUT rising above over-

voltage

threshold (target voltage + 150 mV)

E_OV1

M_OV1

Rise: 8 µs

Fall: 8 µs

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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