TPA032D02

10-W STEREO CLASS-D AUDIO POWER AMPLIFIER

SLOS243A – DECEMBER 1999 – REVISED MARCH 2000

14

POST OFFICE BOX 655303

APPLICATION INFORMATION

the ideal class-D amplifier (continued)

Control logic is used to adjust the output power, and both transistors are never on at the same time. If the output

voltage is rising, M1 is on for a longer period of time than M2.

Supply Current

Time

M1 on

M2 off

M1 off

M2 on

M1 on

M2 off

Output Current

Inductor Current

0

Figure 5. Class-D Currents

VDD

VA

VOUT

0

Time

M1 on

M2 off

M1 off

M2 on

M1 on

M2 off

Figure 6. Class-D Voltages