AP3591

Document number: DS36906 Rev. 1 - 2

14 of 18

www.diodes.com

March 2014

© Diodes Incorporated

AP3591

A Product Line of

Diodes Incorporated

The AP3591 provides full-time over voltage protection whenever soft-start completes or not. The typical OVP threshold is 125% of the internal

built into the over voltage protection circuit to prevent false transitions.

Figure 4. Over Voltage Protection

12. Thermal Shutdown

If the junction temperature of the device reaches the thermal shutdown limit of +160ºC, the AP3591 shuts itself off. Both UGATE and LGATE are

driven low, turning off both MOSFETs. The output is discharged with the internal 20

Ω transistor. When the junction temperature cools down to the

required level (+140°C nominal), the device initiates soft-start as during a normal power-up cycle.

1V/div

5V/div

Time 100µs/div

20V/div