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参数资料
| 型号： | TB2936HQ |
| 元件分类： | 音频／视频放大 |
| 英文描述： | 26 W, 2 CHANNEL, AUDIO AMPLIFIER, PZFM25 |
| 封装： | 1 MM PITCH, PLASTIC, HZIP-25 |
| 文件页数： | 14/20页 |
| 文件大小： | 470K |
| 代理商： | TB2936HQ |
TB2936HQ
2009-02-04
3
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.
Standby Control Voltage (VSB): Pin 4
Standby
Power
VSB (V)
ON
OFF
0 to 0.9
OFF
ON
2.9 to VCC
Check the pop levels when the time constant of
pin 4 is changed.
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.
Figure 2 Standby Switch
VCC
Low-current-rated switch
Battery
Standby
VCC
From microcontroller
Battery
Standby
– Using the Standby Switch –
– Conventional Method –
VCC
High-current-rated switch
Battery
VCC
From
microcontroller
Battery
Relay
Figure 1 Setting Pin 4 High Turns on
Power
ON
4
OFF
10 k
Ω
to Bias
filter network
≈ 2 VBE
VCC
Power
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