Detailed description

STODD01

16/31

Doc ID 17789 Rev 2

The use of the reset function requires an external pull-up resistor which must be connected

in the range of 100 k

Ω to 1 MΩ is recommended.

If the reset function is not used, the reset pin may remain floating on the board.

7.5

Overtemperature protection

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

temperature exceeds 150 °C (typ.) the device stops operating. As soon as the temperature

falls below 135 °C (typ.) normal operation is restored.

7.6

Overvoltage protection

The device provides overvoltage protection for monitoring the step-up output voltage.

If the sensed voltage on ch1 output exceeds 15.3 V (typ.) the step-up channel stops

switching. As soon as the output capacitor is discharged and the sensed voltage is below

14.8 V, it re-starts to switch (see Figure 13).

Figure 12.

Reset function

V

R_TL

V

R_TH

Reset

t

DEL

V

R_TL

V

R_TH

Reset

t

DEL

Figure 13.

OVP function

15.3V

14.8V

OUTPUT Voltage

No Switching

Switching

Switching

OVP signal