A good PCB layout for the BD708 should include a solid ground plane, wide power traces, and a thermal relief pattern under the IC. This helps to dissipate heat efficiently and reduce thermal resistance.
The input capacitor should be selected based on the input voltage, output voltage, and output current requirements. A general rule of thumb is to choose a capacitor with a capacitance value between 1uF to 10uF, and a voltage rating that exceeds the maximum input voltage.
The BD708 can deliver up to 2A of output current, but this may vary depending on the input voltage, output voltage, and ambient temperature. It's essential to check the datasheet and perform thermal calculations to ensure the device operates within its safe operating area.
The BD708 has a built-in overcurrent protection feature that can be enabled by connecting a resistor between the OCP pin and the GND pin. The value of the resistor determines the overcurrent threshold. A lower resistor value sets a higher overcurrent threshold, and vice versa.
The EN (enable) pin is used to turn the BD708 on or off. When the EN pin is pulled high, the device is enabled, and when it's pulled low, the device is disabled. This pin can be used to implement power sequencing, shutdown, or low-power modes.
BD708 datasheet
by STMicroelectronics
