TB2959HQ Datasheet, PDF (5/24 Pages) Toshiba Semiconductor – Maximum Power 47W BTL 4-ch Audio Power IC

6. Detailed Description
TB2959HQ
Component
Name
Recomm
ended
Value
Pin
C1
0.22 μF INx(x:1 to 4)
C2
10 μF
Ripple
C3
0.1 μF
V_CC1, V_CC2
Purpose
To eliminate DC
To reduce ripple
To provide sufficient
oscillation margin
C4
1uF
Mute
To reduce pop noise
C5
3900 μF V_CC1, V_CC2
Ripple filter
C6
1 μF
AC-GND
Common reference
voltage for all input
C7
0.22μF
AUX-IN _{To eliminate DC}
R1
47kΩ
Mute
To reduce pop noise
Effect (Note4)
Lower than Recommended Value Higher than Recommended Value
Cut-off frequency becomes higher
Turn on/off time and turn-on diag.
cycle shorter
Cut-off frequency becomes lower
Turn on/off time and turn-on diag.
cycle longer
Reduces noise and provides sufficient oscillation margin
High pop noise. Duration until
mute function is turned on/off is
short.
Low pop noise. Duration until mute
function is turned on/off is long.
Power supply ripple filtering
Pop noise is suppressed when C1: C6 = 1:4. (Note5)
Cut-off frequency is increased in
AUX
High pop noise. Duration until
mute function is turned on/off is
short.
Cut-off frequency is reduced in
AUX.
Low pop noise. Duration until mute
function is turned on/off is long.
Note4: When the unrecommended value is used, please examine it enough by system evaluation.
Note5: Since “AC-GND” pin is a common reference voltage for all input, this product needs to set the ratio of an
input apacitance (C1) and the AC-GND capacitance (C6) to 1:4.
5
2011-11-08