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参数资料
| 型号： | TDA7245A |
| 厂商： | STMICROELECTRONICS |
| 元件分类： | 音频／视频放大 |
| 英文描述： | 16 W, 1 CHANNEL, AUDIO AMPLIFIER, PDIP18 |
| 封装： | POWER, DIP-18 |
| 文件页数： | 3/6页 |
| 文件大小： | 954K |
| 代理商： | TDA7245A |
ELECTRICAL CHARACTERISTICS (Refer to the test circuit, Tamb = 25°C, VS = 16.5V, RL = 4
, f =
1kHz; unless otherwise specified).
Symbol
Parameter
Test Condition
Min.
Typ.
Max.
Unit
VS
Supply Voltage
12
30
V
VO
Quiescent Output Voltage
VS = 24V
11.6
V
Id
Quiescent Drain Current
VS = 28V
24
35
mA
PO
Output Power
d = 1%
VS = 16.5V, RL = 4
VS = 20V, RL = 8
d = 10%
VS = 16.5V, RL = 4
VS = 20V, RL = 8
Music Power (*)
VS = 24V, d = 10%, RL = 4
6.5
6
5
7.5
6.5
16
W
d
Harmonic Distortion
PO = 50mW to 4W
f = 1KHz
f = 10KHz
VS = 20V, RL = 8
,
PO = 50mW to 3.5W
f = 1KHz
f = 10KHz
0.15
0.8
0.12
0.5
%
RI
Input Impedance
f = 1kHz
30
K
BW
Small signal bandwidth (-3dB)
PO = 1W
20 to 40,000
Hz
GV
Voltage Gain (open loop)
f = 1KHz
75
dB
GV
Voltage Gain (closed loop)
f = 1KHz
39
40
41
dB
eN
Total Input Noise
B = 22 - 22,000Hz
Rs = 50
Rs = 1k
Rs = 10k
1.7
2
36
mV
V
S/N
Signal to Noise Ratio
PO = 5W; RS = 10K
86
dB
SVR
Supply Voltage Rejection
VS = 16.5V; RL = 8
; f = 100Hz
Rs = 10k
; Vr = 0.5Vrms
38
45
dB
Tsd
Thermal shut-down Junction
Temperature
150
°C
STAND-BY FUNCTION
Symbol
Parameter
Test Condition
Min.
Typ.
Max.
Unit
Vst-by
Pin 5 DC Voltage
SW1 Open (play)
6.4
V
Ist-by
Pin 5 Current
SW1 Closed (st-by)
160
280
A
ATTst-by
Stand-by Attenuation
f = 1kHz
70
90
dB
Vt
Stand-by Threshold (pin 5)
3.8
V
Id st-by
Quiescent Current @ Stand-by
2
4
mA
Note (*):
MUSIC POWER CONCEPT
MUSIC POWER is ( according to the IEC clauses n.268-3 of Jan 83) the maximal power which the amplifier is capable of producing across the
rated load resistance (regardless of non linearity) 1 sec after the application of a sinusoidal input signal of frequency 1KHz.
According to this definition our method of measurement comprises the following steps:
1) Set the voltage supply at the maximum operating value -20%
2) Apply a input signal in the form of a 1KHz tone burst of 1 sec duration; the repetition period of the signal pulses is > 60 sec
3) The output voltage is measured 1 sec from the start of the pulse
4) Increase the input voltage until the output signal show a THD = 10%
5) The music power is then V
2
out
/R1, where Vout is the output voltage measured in the condition of point 4) and R1 is the rated load impedance
The target of this method is to avoid excessive dissipation in the amplifier.
TDA7245A
3/6
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