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參數(shù)資料
| 型號(hào)： | TA8273H |
| 廠商： | Toshiba Corporation |
| 英文描述： | RAC15-DA(-E)(-ST) Series - Powerline Regulated AC-DC Converters; Output Voltage (Vdc): 5V; Features: Compact AC-DC Power Supply; 15 Watt PCB Mount Package; Universal Input Voltage Range; 3000VAC Isolation; Low Output Ripple and Noise; Short Circuit Protected; UL Certified |
| 中文描述： | 東芝雙極線性集成電路硅單片 |
| 文件頁數(shù)： | 3/13頁 |
| 文件大小： | 249K |
| 代理商： | TA8273H |
TA8273H
2002-02-13
3
Caution and Application Method
(Description is made only on the single channel.)
1. Voltage Gain Adjustment
This IC has no NF (negative feedback) terminals. Therefore, the voltage gain can’t adjusted, but it makes
the device a space and total costs saver.
The voltage gain of Amp.1
The voltage gain of Amp.2A, B
The voltage gain of BLT Connection : G
V (BTL)
6dB
Therefore, the total voltage gain is decided by expression below.
G
V
G
V1
G
V2
G
V (BTL)
1 20 6 27dB
: G
V1
1dB
: G
V2
20dB
2. Stand-by SW Function
(pin 4)
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
about 3V
BE
(typ.), and the power supply current is
about 2 A (typ.) at the stand-by state.
Control Voltage of pin 4: V
SB
Stand-by
Power
V
SB
(V)
ON
OFF
0~1.5
OFF
ON
3~V
CC
Adjustage of Stand-by SW
(1)
Since V
CC
can directly be controlled to ON or OFF by the microcomputer, the switching relay can be
omitted.
Since the control current is microscopic, the switching relay of small current capacity is satisfactory
for switching
(2)
Amp. 1
Input
Amp. 2A
Amp. 2B
Figure 1 Block Diagram
Figure 2 With pin 4 set to High,
Power is turned ON
ON
4
OFF
10 k
to BIAS
CUTTING CIRCUIT
2 V
BE
V
CC
Power
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