Q: TAS5342LA vs TAS5342A

 

Please help me with the following questions?

1. What is (are) the primary difference(s) between the TAS5342LA and TAS5342A other than heat dissipation capabilities and voltage supply-to-gnd ranges for the bootstrap and half-bridge (output) sub-circuits? 

2. Why was the TAS5342LA designed to have higher heat dissipation ratings vs. TAS5342A?  

3. Why is the voltage supply -to- gnd voltage ranges lower in the TAS5342LA vs. the TAS5342  when both are rated for the same amount of output power?  (For this question, I'm really trying to understand why the TAS5342A would allow for more output voltage swing of the output but dissipate less heat than the TAS5342LA.)

Help in understanding this device more throughly would be greatly appreciated!


A: Re: TAS5342LA vs TAS5342A

1) What are the primary differences?
TAS5342A has 80mR 50V Fets, TAS5342LA has 110mR 40V Fets
2) Why was the TAS5342LA/TAS5342L designed to have higher heat dissipation ratings than the TAS5342A?

The changes were made because it was cheaper for the customers. TI offers both the TAS5342A and
TAS5342LA so that the customer can choose if they want to pay for higher efficiency. 
3) Why does TAS5342A allow for more output voltage swing but dissipate less heat than the TAS5342LA?
The abs max voltages are different because we used different FETs and different ESD cells to support these FETs.