A7240 [UTC]
20W BRIDGE AMPLIFIER FOR CAR RADIO; 20W桥式放大器汽车收音机
| 型号： | A7240 |
| 厂家： | 
Unisonic Technologies |
| 描述： | 20W BRIDGE AMPLIFIER FOR CAR RADIO |
| 文件： | 总6页 (文件大小：106K) |
| 中文： | 中文翻译 | 下载： | 下载PDF数据表文档文件 |
UNISONIC TECHNOLOGIES CO., LTD
A7240
LINEAR INTEGRATED CIRCUIT
20W BRIDGE AMPLIFIER FOR
CAR RADIO
ꢀ
DESCRIPTION
The UTC A7240 is a 20W bridge audio amplifier IC and designed
for car radio applications.
1
A comprehensive array of on-chip protection, include protection
against AC and DC output short circuits (to ground and across the
load), load dump transients, and junction over temperature, is
feature to provide reliable operation. Furthermore, the UTC A7240
protects the loudspeaker when one output is short-circuited to
ground.
TO-220Z7
ꢀ
FEATURES
* Few External Components
* Output Protected Against short Circuits to Ground and Across
Load
*Pb-free plating product number: A7240L
* Dump Transient
* Thermal Shutdown
* Loudspeaker Protection
* High Current Capability
* Low Distortion/Low Noise
ꢀ ORDERING INFORMATION
Order Number
Package
Packing
Tube
Normal
Lead Free Plating
A7240L-TB7-T
A7240-TB7-T
TO-220Z7
A7240L-TB7-T
(1)Packing Type
(2)Package Type
(3)Lead Plating
(1) T: Tube
(2) TB7: TO-220Z7
(3) Lead Free Plating, Blank: Pb/Sn
www.unisonic.com.tw
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Copyright © 2005 Unisonic Technologies Co., Ltd
QW-R107-048,A
A7240
LINEAR INTEGRATED CIRCUIT
ꢀ
PIN CONFIGURATION
7
6
5
4
3
2
Output
Supply Voltage
Output
GND
Input
Sub and Stand-by
Feedback
1
TAB Connected to Pin 4
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A7240
LINEAR INTEGRATED CIRCUIT
ꢀ
ABSOLUTE MAXIMUM RATINGS
PARAMETER
SYMBOL
VSS
RATINGS
UNIT
V
Operating Supply Voltage
18
28
DC Supply Voltage
VSS
V
Peak Supply Voltage (for 50ms)
Peak Output Current (non repetitive t = 0.1ms)
Peak Output Current (repetitive f .10Hz)
Power Dissipation at TC = 85°C
Storage and Junction Temperature
VSS(PEAK)
IO(PEAK)(*)
I O(PEAK)(*)
PD
40
V
4.5
A
3.5
A
16
W
°C
TSTG, TJ
-40~+150
Note Absolute maximum ratings are those values beyond which the device could be permanently damaged.
Absolute maximum ratings are stress ratings only and functional device operation is not implied.
(*) Internally limited
ꢀ
THERMAL DATA
PARAMETER
Thermal Resistance Junction-case
SYMBOL
RATINGS
4
UNIT
V
θJC
ꢀ
ELECTRICAL CHARACTERISTICS(Ta = 25°C, RTH (heatsink)= 4°C/W, VSS = 14.4V)
PARAMETER
SYMBOL
TEST CONDITIONS
MIN TYP MAX UNIT
Supply Voltage
VSS
18
V
Output Offset Voltage
Total Quiescent Current
VO(OFF)
IQ
150 mV
120 mA
RL =4Ω
65
20
12
0.1
RL =4Ω 18
RL =8Ω 10
RL =4Ω
Output Power
Distortion
POUT
THD
f = 1kHz, d= 10%
W
0.5
%
f = 1kHz, POUT = 50MW ~ 12W
RL =8Ω
0.05 0.5
Voltage Gain
GV
f = 1KHz
39.5 40 40.5 dB
Supply Voltage Rejection
SVR
f = 100Hz, Rg = 10KΩ
35
40
2
dB
B= Curve A
B = 22Hz~22KHz
Total Input Noise
eN
Rg = 10KΩ
µV
3
10
Efficiency
η
RL =4Ω, f = 1KHz
65
%
kΩ
mV
Input Resistance
Input Sensitivity
RIN
f = 1kHz
70
VIN
fL
f = 1kHz, POUT = 2W, RL =4Ω
28
Low
88
25
129 Hz
kHz
Frequency Roll Off (-3dB)
POUT = 15W, RL =4Ω
High
fH
Stand-by Threshold
Stand-by Current
VTHD (PIN2)
ISTN-BY
1
V
200
90
µA
dB
Stand-by Attenuation
ASTN-BY VOUT = 2Vrms
70
UNISONIC TECHNOLOGIES CO., LTD
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QW-R107-048,A
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A7240
LINEAR INTEGRATED CIRCUIT
ꢀ
TEST AND APPLICATION CIRCUIT
+VSS
C7
0.22μF
C5
0.1μF
C4
220μF
R2
2.2Ω
6
INPUT
3
2
7
C1
1μF
UTC A7240
1
OUT
5
4
R1
2.2Ω
C2
22μF
C3
22μF
STANDBY
C6
0.22μF
COMPONENT USAGE SUGGESTION
Component Suggest Purpose
Frequency Stability
Larger than
Danger of High Frequency
Oscillation
Smaller than
R1, R2
C1
2.2W
1μF
Higher Turn On Pop.
Higher Low Frequency Cutoff
Input DC Decoupling Higher Turn On and Stand-by Delay
Increase of SVR Increase of the
Ripple Rejection
22μF
22μF
C2
Degradation of SVR
Turn On Delay
Feedback low
Frequency Cutoff
C3
Higher Low Frequency Cutoff
220μF
0.1μF
C4
C5
Supply Filter
Danger of Oscillation
Danger of Oscillation
Danger of Oscillation
Supply Bypass
Frequency Stability
0.22μF
C6, C7
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A7240
LINEAR INTEGRATED CIRCUIT
ꢀ
TYPICAL CHARACTERISTICS
OutputPower vs. Supply Voltage
Distortion vs. Output Power
VSS = 14.4V
V
R
SS = 10%
= 4Ω
22
L
8
6
4
2
0
R
L
= 4Ω
f = 1KHz
f = 1KHz
18
14
10
6
9
10 11 12 13 14 15
VS (V)
2
5
10
14
PD (W)
OutputPower vs. Supply Voltage
Distortion vs. Output Power
THD = 10%
= 8Ω
f = 1KHz
VSS = 14.4V
= 8Ω
f = 1KHz
R
L
RL
14
12
10
8
14
12
10
8
6
6
4
4
9
10 11 12 13 14 15 16
SS (V)
0
2
4
6
8
10 12
V
P
D (W)
SupplyVoltage Rejection vs. Frequency
VSS = 14.4V
VR
= 0.5V
Rg = 10KΩ
60
50
10
40
C2 = 22μF
C2 = 10μF
30
20
102
103
f (Hz)
UNISONIC TECHNOLOGIES CO., LTD
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A7240
LINEAR INTEGRATED CIRCUIT
UTC assumes no responsibility for equipment failures that result from using products at values that
exceed, even momentarily, rated values (such as maximum ratings, operating condition ranges, or
other parameters) listed in products specifications of any and all UTC products described or contained
herein. UTC products are not designed for use in life support appliances, devices or systems where
malfunction of these products can be reasonably expected to result in personal injury. Reproduction in
whole or in part is prohibited without the prior written consent of the copyright owner. The information
presented in this document does not form part of any quotation or contract, is believed to be accurate
and reliable and may be changed without notice.
UNISONIC TECHNOLOGIES CO., LTD
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