The UC2524DW requires careful layout and placement to ensure proper operation. TI recommends placing the IC close to the input capacitors, using short traces, and separating the high-current paths from the low-current paths. A good layout practice is to use a star-ground configuration and to keep the input and output grounds separate.
The input capacitors should be selected based on the input voltage, current, and frequency. TI recommends using low-ESR capacitors with a voltage rating of at least 1.5 times the maximum input voltage. The capacitance value should be chosen to ensure that the input ripple voltage is within the specified limits.
The UC2524DW can deliver up to 4A of output current, but this depends on the input voltage, output voltage, and ambient temperature. The maximum output current is limited by the internal power dissipation and the thermal design of the system.
The UC2524DW has a built-in overcurrent protection feature that can be enabled by connecting a resistor between the OC pin and the GND pin. The value of the resistor determines the overcurrent threshold. TI recommends using a resistor value that sets the overcurrent threshold to 1.5 times the maximum expected output current.
The bootstrap capacitor is used to generate the gate drive voltage for the high-side MOSFET. It is charged through the bootstrap diode when the low-side MOSFET is on, and it provides the necessary voltage to turn on the high-side MOSFET. The bootstrap capacitor value should be chosen based on the input voltage, output voltage, and switching frequency.
UC2524DW datasheet
by Texas Instruments
