ACE7255E

24V, 2A, Forced PWM Synchronous Step-Down Converter

VER 1.1

7

Over-Temperature Protection

Thermal protection disables the output when the junction temperature rises to approxim ately 150°C,

allowing the device to cool down. When the junction temperature cools to approximately 110°C, the output

circuitry is again enabled. Depending on power dissipation, thermal resistance, and ambient temperature,

the thermal protection circuit may cycle on and off. This cycling limits regulator dissipation, protecting the

device from damage as a result of overheating.

Application Information

External Output Voltage Setting

In external Output Voltage Setting Version selected, the ACE7255E regulator is programmed using an

external resistor divider. The output voltage is calculated using below equation.

Where: VREF =0.8V typically (the internal reference voltage)

Resistors Rd has to be between 1kOhm to 12KOhm and thus Ru is calculated by following equation.