Texas Instruments provides a recommended PCB layout in the datasheet, which includes a thermal pad connected to a large copper area on the PCB to dissipate heat. Additionally, it's recommended to use a 4-layer PCB with a solid ground plane to reduce thermal resistance.
To ensure stability, it's essential to follow the recommended component values and PCB layout in the datasheet. Additionally, make sure to decouple the power supply lines with capacitors and use a low-ESR capacitor for the output filter. Also, avoid using long wires or traces that can cause parasitic inductance.
The maximum power dissipation of the LM4546BVH/NOPB is dependent on the ambient temperature and the thermal resistance of the PCB. The datasheet provides a power dissipation calculation formula, which takes into account the output power, supply voltage, and thermal resistance. Typically, the maximum power dissipation is around 20W.
Yes, the LM4546BVH/NOPB can be used in a bridged configuration to increase the output power. To configure it, connect the outputs of two devices in a differential configuration, with one device driving the positive output and the other driving the negative output. Make sure to use a common mode filter to reduce EMI.
The recommended input coupling capacitor value is typically in the range of 1uF to 10uF. A larger capacitor value can provide better low-frequency response, but may also increase the risk of oscillations. A smaller capacitor value can improve high-frequency response, but may also reduce the low-frequency response.
LM4546BVH/NOPB datasheet
by Texas Instruments
