tb2936hq TOSHIBA Semiconductor CORPORATION, tb2936hq Datasheet - Page 3
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tb2936hq
Manufacturer Part Number
tb2936hq
Description
49 W ? 4-ch Btl Audio Power Ic
Manufacturer
TOSHIBA Semiconductor CORPORATION
Datasheet
1.TB2936HQ.pdf
(20 pages)
Detailed Description
(The following only describes one of the four channels, since all these channels are
symmetrical.)
1. Standby Switch
Standby Control Voltage (V
Benefits of the Standby Switch
The power supply can be turned on or off via
pin 4 (Stby). The threshold voltage of pin 4 is
set at about 3 V
current is about 0.01 μA (typ.) in the standby
state.
Check the pop levels when the time constant of
pin 4 is changed.
(1)
(2)
Standby
OFF
ON
V
Since the control current is minuscule, a low-current-rated switching relay can be used.
CC
can be directly turned on or off by a microcontroller, eliminating the need for a switching relay.
Standby
V
CC
BE
Power
OFF
Low-current-rated switch
ON
High-current-rated switch
(typ.). The power supply
(pin 4)
V
CC
Battery
2.9 to VCC
SB
V
0 to 0.9
– Using the Standby Switch –
SB
Battery
): Pin 4
– Conventional Method –
(V)
Figure 2 Standby Switch
From microcontroller
3
V
CC
Standby
OFF
ON
Figure 1 Setting Pin 4 High Turns on
Power
V
Relay
CC
4
Power
10 kΩ
From
microcontroller
Battery
Battery
V
CC
≈ 2 V
BE
to Bias
filter network
TB2936HQ
2009-02-04