TECHNICAL INFORMATION

6

TA1101B, Rev. 2.2, 08.17.00

Components

Description

the BIASCAP voltage (approximately 2.4VDC).

)

R

/

R

(

12

A

I

F

. Please refer to the

Amplifier Gain paragraph in the Application Information section.

)

C

R

2

(

1

f

I

I

C

π

=

Bias resistor. Locate close to pin 5 and ground at pin 7.

BIASCAP decoupling capacitor. Should be located close to pin 14.

Charge pump input capacitor. This capacitor should be connected directly between pins 1

and 2 and located physically close to the TA1101B.

Charge pump output capacitor that enables efficient high side gate drive for the internal H-

bridges. To maximize performance, this capacitor should be connected directly between

pin 29 (CPUMP) and pin 27 (VDDA). Please observe the polarity shown in the Application/

Test Circuit.

Supply decoupling for the low current power supply pins. For optimum performance, these

components should be located close to the pin and returned to their respective ground as

shown in the Application/Test Circuit.

Supply decoupling for the high current, high frequency H-Bridge supply pins. These

components must be located as close to the device as possible to minimize supply

overshoot and maximize device reliability. Both the high frequency bypassing (0.1uF) and

bulk capacitor (180uF) should have good high frequency performance including low ESR

and low ESL. Panasonic HFQ or FC capacitors are ideal for the bulk capacitor.

Zobel Capacitor.

conditions or with real world loads, including loudspeakers which usually exhibit a rising

impedance with frequency.

Schottky diodes that minimize undershoots of the outputs with respect to power ground

during switching transitions. For maximum effectiveness, these diodes must be located

close to the output pins and returned to their respective PGND. Please see

Application/Test Circuit for ground return pin.

into an audio signal. Forms a second order filter with a cutoff frequency of

)

C

L

2

(

1

f

O

O

C

π

=

and a quality factor of

O

O

O

L

C

L

C

R

Q

=

.

Output capacitor.

Common Mode Capacitor.