Texas Instruments recommends a compact layout with the UC29432N placed close to the battery, using a star-ground configuration, and keeping the high-current paths short and wide. Additionally, a ground plane and shielding can help reduce EMI and noise.
The UC29432N has a thermal pad that should be connected to a heat sink or a thermal plane on the PCB. Ensure good thermal conductivity by using a thermal interface material and a heat sink with a low thermal resistance. Also, keep the surrounding components at a safe distance to prevent thermal coupling.
Texas Instruments recommends using a low-ESR ceramic capacitor with a value of 10uF to 22uF, rated for the maximum input voltage. The capacitor should be placed close to the UC29432N's input pins to minimize inductance and ensure stable operation.
The UVLO threshold of the UC29432N is fixed at 2.5V, but it can be adjusted by using an external resistor divider network connected to the EN pin. However, this is not recommended as it may affect the device's performance and reliability.
The maximum allowed voltage drop across the UC29432N's internal FETs is 0.5V. Exceeding this limit may cause the device to overheat or malfunction. Ensure that the input voltage is within the recommended range and the output current is within the specified limits.
UC29432N datasheet
by Texas Instruments
