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Номер произв TB2936HQ
Описание 49W X 4-ch BTL Audio Power IC
Производители Toshiba
логотип Toshiba логотип 



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TB2936HQ Даташит, Описание, Даташиты
TB2936HQ
TOSHIBA Bi-CMOS Linear Integrated Circuit Silicon Monolithic
TB2936HQ
49 W × 4-ch BTL Audio Power IC
The TB2936HQ is a four-channel BTL power amplifier for car
audio applications.
This IC has a pure complementary P-ch and N-ch DMOS output
stage, offering maximum output power (POUT MAX) of 49 W.
It includes a standby switch, mute function and various
protection features.
Features
High output power
POUT MAX (1) = 49 W (typ.)
(VCC = 15.2 V, f = 1 kHz, JEITA max, RL = 4 Ω)
Weight: 7.7 g (typ.)
POUT MAX (2) = 43W (typ.)
(VCC = 14.4 V, f = 1 kHz, JEITA max, RL = 4 Ω)
POUT (1) = 26 W (typ.)
(VCC = 14.4 V, f = 1 kHz, THD = 10%, RL = 4 Ω)
POUT (2) = 23 W (typ.)
(VCC = 13.2 V, f = 1 kHz, THD = 10%, RL = 4 Ω)
Low THD: 0.015% (typ.) (VCC = 13.2 V, f = 1 kHz, POUT = 5 W, RL = 4 Ω)
Low noise: VNO = 160 μVrms (typ.)
(VCC = 13.2 V, Rg = 0 Ω, BW = 20 Hz to 20 kHz, RL = 4 Ω)
Standby switch (pin 4)
Mute function (pin 22)
Output DC offset detection and clip detection (pin 25)
Various protection features
Thermal overload; overvoltage; output short-circuits to GND, VCC and across the load; speaker current limiting
Operating supply voltage: VCC (opr) = 8.0 to 18 V (RL = 4 Ω)
Note 1: Install the device correctly. Otherwise, the device or system may be degraded, damaged or even destroyed.
Note 2:
The protection features are intended to avoid output short-circuits or other abnormal conditions temporarily. It
is not guaranteed that they will prevent the IC from being damaged.
Exposure to conditions beyond the guaranteed operating ranges may not activate the protection features,
resulting in an IC damage due to output short-circuits.
1 2009-02-04









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TB2936HQ Даташит, Описание, Даташиты
Block Diagram
TB2936HQ
10
Ripple
C1 11 IN1
16
20
TAB VCC2 VCC1
+B
Out1 (+)
9
PW-GND1
8
Out1 ()
7
RL
C1 12 IN2
13 Pre-GND
Out2 (+)
5
PW-GND2
2
Out2 ()
3
RL
C1 15 IN3
C6
16 AC-GND
Out3 (+)
17
PW-GND3
18
Out3 ()
19
RL
C1 14 IN4
5V
Play
Mute
R1
4 Stby
22 Mute
Out4 (+)
21
PW-GND4
24
Out4 ()
23
RL
Offset/short 25
Some of the functional blocks, circuits or constants may be omitted from the block diagram or simplified for
explanatory purposes.
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TB2936HQ Даташит, Описание, Даташиты
TB2936HQ
Detailed Description
(The following only describes one of the four channels, since all these channels are
symmetrical.)
1. Standby Switch (pin 4)
The power supply can be turned on or off via
pin 4 (Stby). The threshold voltage of pin 4 is
set at about 3 VBE (typ.). The power supply
current is about 0.01 μA (typ.) in the standby
state.
ON Power
OFF
10 kΩ
4
VCC
2 VBE
Standby Control Voltage (VSB): Pin 4
to Bias
filter network
Standby
ON
OFF
Power
OFF
ON
VSB (V)
0 to 0.9
2.9 to VCC
Check the pop levels when the time constant of
pin 4 is changed.
Figure 1 Setting Pin 4 High Turns on
Power
Benefits of the Standby Switch
(1) VCC can be directly turned on or off by a microcontroller, eliminating the need for a switching relay.
(2) Since the control current is minuscule, a low-current-rated switching relay can be used.
High-current-rated switch
Battery
Relay
Battery
VCC
VCC
– Conventional Method –
From
microcontroller
Low-current-rated switch
Battery
From microcontroller
Standby VCC
Standby VCC
– Using the Standby Switch –
Figure 2 Standby Switch
Battery
3 2009-02-04










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