STOD13CM

Detailed description

024087 Rev 1

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initiated. After around 2 ms the soft-start for the inverting is started. The positive and

negative voltage will be under regulation around 13 ms after EN pin is asserted high.

7.7

Undervoltage lockout

The undervoltage lockout function prevents improper operation of the STOD13CM when the

input voltage is not high enough. When the input voltage is below the UVLO threshold, the

device is in shutdown mode. The hysteresis of 50 mV prevents unstable operation when the

input voltage is close to the UVLO threshold.

7.8

Overtemperature protection

An internal temperature sensor continuously monitors the IC junction temperature. If the IC

temperature exceeds 140 °C (typ) the device stops operating. As soon the temperature falls

below 125 °C (typ) normal operation is restored.

7.9

Short-circuit protection during soft-start (SSD)

During device soft-start on positive output, an internal comparator checks if the panel is

damaged. In this case, soft-start is stopped and the device is parked in power-off. To restore

to normal functionality (assuming that the anomalous load condition has been removed), it

is necessary to restart the converter through an enable transient.

In the opposite case (panel not damaged), during soft-start, after positive output startup, a

negative output soft-start will follow until normal output functionality and voltages are

reached.

7.10

Overload protection (OLP)

Output current is internally limited. An overload condition, such as a short-circuit, between

the two outputs or between each output and GND induces the device to power off. To

restore to normal functionality (assuming that the short condition has been removed), it is

necessary to restart the converter through an enable transient.

7.11

Short-circuit protection (SCP)

stages of the device are turned off. This status is maintained, preventing current flowing to

the load. A new enable transition is needed to restart the device. During startup, the short-

circuit protection is active.

7.12

Fast discharge

quickly discharge the CMID and CO2 capacitors, lowering the differential output voltage

discharged to 0 V, the switches turn off and the outputs will be high impedance.