TA8233BHQ Toshiba, TA8233BHQ Datasheet - Page 3

• Manufacturer Part Number: TA8233BHQ
• Manufacturer: Toshiba

Specifications of TA8233BHQ

• No. Of Channels: 2
• Package: HZIP 17-P-2.00
• Recommended Vcc (v): 13.2
• Rl=2 Ohm: 26W x 2
• Rl=4 Ohm: 19W x 2
• Rl=8 Ohm: -
• Features/built-in Functions: 2 BTL channels, standby switch, clipping/shorting detector
• Operating Voltage (v): 9 to 18

2. Stand−by SW function
The total closed loop gain G
amp 1 is G
The closed loop voltage gain of power amp, amp 3 and
amp 4 is fixed at G
Therefore, the total closed circuit voltage gain G
obtained through BTL connection by the expression as
below.
For example, when R
expressions (1) and (2) as below.
The voltage gain is reduced when R
(Fig.2)
With the voltage gain reduced, since (1) the oscillation
stability is reduced, and (2) the pop noise changes
when V
By means of controlling pin(4) (stand−by terminal) to
high and low, the power supply can be set to on and off.
The threshold voltage of pin(4) is set at 2.1V (3V
the power supply current is about 1µA (typ.) at the
stand−by state.
Control voltage of pin(4): V
Adjustage of stand−by SW
(1) Since V
(2) Since the control current is microscopic, the switching relay of small current capacity is satisfactory for
Stand − By
switching
G
G
G
V
V
V1
On
Off
≒24 + 20 + 6 = 50dB
= G
CC
=
20
V1
V1
CC
is set to on, refer to the items 3 and 4.
l
og
.
+ G
can directly be controlled to on or off by the microcomputer, the switching relay can be omitted.
R1
V3
+
f R
V3
Power
(R
+ 6 (dB)………(2)
Off
On
+
≒G
f
f
R2
= 0Ω, G
+
R2)
V4
V
(SB)
= 20dB.
(dB)
of this IC can be obtained by expression below when the closed loop voltage gain of
V
V
is obtained by the
L
3~V
(SB)
L
0~2
f
L
CC
is increased.
(V)
(1)
V
BE
is
), and
3
TA8233BHQ
2004-09-28