DA9213 datasheet(39/63 Pages) RENESAS

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DA9213, DA9214, and DA9215

Multi-Phase 5A/Phase DC-DC Buck Converter

Datasheet

Revision 3.4

10-Feb-2022

CFR0011-120-00

39 of 62

7.5

Internal Temperature Supervision

To protect DA9213, DA9214, and DA9215 from damage due to excessive power dissipation, the

internal temperature is continuously monitored. There are three temperature thresholds, as shown in

Table 12.

Table 12: Over-Temperature Thresholds

Temperature

Threshold

Typical

Temperature

Setting

Interrupt Event

Status Bit

Masking Bit

TEMP_WARN

125 °C

E_TEMP_WARN

TEMP_WARN

M_TEMP_WARN

TEMP_CRIT

140 °C

E_TEMP_CRIT

TEMP_CRIT

M_TEMP_CRIT

TEMP_POR

150 °C

When the junction temperature reaches the TEMP_WARN threshold, DA9213, DA9214, and DA9215

will assert the bit TEMP_WARN and will generate the event E_TEMP_WARN. If not masked using bit

M_TEMP_WARN, the output port nIRQ will be asserted. The status bit TEMP_WARN will remain

asserted as long as the junction temperature remains higher than TEMP_WARN.

When the junction temperature increases further to TEMP_CRIT, DA9213, DA9214, and DA9215 will

immediately disable the buck converter, assert the bit TEMP_CRIT, and will generate the event

E_TEMP_CRIT. If not masked via bit M_TEMP_CRIT, the output port nIRQ will be asserted. The

status bit TEMP_CRIT will remain asserted as long as the junction temperature remains higher than

TEMP_CRIT. The buck converter will be kept disabled as long as the junction temperature is above

TEMP_CRIT. It will not be automatically re-enabled even after the temperature drops below the valid

threshold (even if the controlling GPI is asserted). A direct write into BUCKA_EN or BUCKB_EN, or a

toggling of the controlling GPI, is needed to enable the buck converter.

Whenever the junction temperature exceeds TEMP_POR, a power on reset to the digital core is

immediately asserted, which stops all functionalities of DA9213, DA9214, and DA9215. This is

needed to prevent possible permanent damage in the case of a rapid temperature increase.

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