DA9313 datasheet(34/54 Pages) DIALOG

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DA9313

High Efficiency Dual Cell Switched Capacitor Divider

Datasheet

Revision 3.0

07-Apr-2017

CFR0011-120-00

34 of 54

11.8 Internal Oscillator

The internal high-speed oscillator generates a signal at fOSC, the internal 6 MHz clock reference. The

high-speed oscillator is enabled on demand.

It is possible to apply an external oscillator delivering the target 6 MHz, see Table 6, to the system.

This requires that GPIO_1 is selected as Ext_Clk_Inp on GPIO_1_PIN. GPIO_1 does not generate

any event in this case.

11.8.1

Internal Temperature Supervision

Due to the high power density and to protect DA9313 from damage due to excessive power

dissipation the internal temperature is continuously monitored, except in DCM, OFF and

POWER_DOWN modes.

There are two temperature thresholds, TTH_WARN and TTH_CRIT, respectively at typically 125 °C and

140 °C. To minimize the current consumption only the TTH_WARN comparator is always on. The

TTH_CRIT comparators are enabled on demand at >125 °C when TTH_WARN is reached.

When the junction temperature reaches the TTH_WARN threshold, DA9313 will assert the bit

TEMP_WARN and will generate the event E_TEMP_WARN. The status bit TEMP_WARN will remain

asserted as long as the junction temperature is higher than TTH_WARN.

When the junction temperature increases further over TTH_CRIT DA9313 will immediately disable the

PVC, will assert the status bit TEMP_CRIT and will progress to FAULT RECOVERY mode, see

section 11.5.

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

TTH_CRIT. DA9313 will remain in FAULT RECOVERY mode as long as the junction temperature is

bigger than TTH_CRIT and will not allow re-enabling of the supplies via I

2C port or register write.

Where the I

2C interface is not connected, providing DA9313 has been configured to boot to ACTIVE

mode via AUTOBOOT, the PVC will shut down (power cycle) then restart and PG on GPIO will go

down and then up again.

DA9313 Datasheet(PDF) 34 Page - Dialog Semiconductor