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ICs for Audio Common Use
AN7522
Dual 3-W BTL audio power amplifier
I Overview
AN7522 is an audio power amplifier IC for the stereo system. In the BTL (balanced transformerless) method, fewer external parts and easier design for applications are required.
7.7 0.3
12 29.75 0.30 28.0 0.3 20.0 0.3 (10.0) (10.0) (1.27)
Unit: mm
(1.3)
3.6
(1.2) 19.1 0.3 21.9 0.3
HSIP012-P-0000A
I Block Diagram
10
GND 11 (Ch.2 output)
VCC 1
Ch.1 output 2
GND 3 (Ch.1 output)
Ch.1 input
Ch.2 input
Volume
Ch.2 output
Ch.1 output
Ch.2 output
Standby
GND
12
4
5
6
7
8
9
1.80 0.15
* Televisions, audio equipment, personal computers, and active speakers
1.2 0.1
3.5 0.3
I Applications
(12.5)
1 0.10 0.25 + 0.05 2.54 -
1.45 0.15
* 3-W output (8 ) with supply voltage of 8 V * On-chip standby function * On-chip volume function
R1.8
0.6
0.15 0.6 + 0.05 - (1.27)
I Features
29.6 0.3
1
AN7522
I Pin Descriptions
Pin No. 1 2 3 4 5 6 Descriptions Supply voltage Ch.1 + output Ground (output ch.1) Ch.1 - output Standby (standby state if this pin is open.) Ch.1 input Pin No. 7 8 9 10 11 12
ICs for Audio Common Use
Descriptions Ground (input) Ch.2 input Volume (max. volume if this pin is open.) Ch.2 - output Ground (output ch.2) Ch.2 + output
I Absolute Maximum Ratings
Parameter Supply voltage Supply current Power dissipation
*3 *1 *2
Symbol VCC ICC PD Topr Tstg
Rating 14 2.0 1.92 -25 to +70 -55 to +150
Unit V A W C C
Operating ambient temperature Storage temperature
*1
Note) *1: Except for the operating ambient temperature and storage temperature, all ratings are for Ta = 25C. *2: At no signal. *3: The power dissipation shown is the value for Ta = 70C.
I Recommended Operating Range
Parameter Supply voltage Symbol VCC Range 3.5 to 13.5 Unit V
I Electrical Characteristics at VCC = 8.0 V, RL = 8 , f = 1 kHz, Ta = 25C 2C
Parameter Quiescent circuit current Standby current Output noise voltage * Voltage gain Total harmonic distortion Maximum output power Ripple rejection ratio * Output offset voltage Volume attenuation rate * Channel balance 1 Channel balance 2 Intermediate voltage gain Channel crosstalk Symbol ICQ ISTB VNO GV THD PO1 RR VOFF Att CB1 CB2 GVM CT Conditions VIN = 0 mV, Vol. = 0 V VIN = 0 mV, Vol. = 0 V Rg = 10 k, Vol. = 0 V PO = 0.5 W, Vol. = 1.25 V PO = 0.5 W, Vol. = 1.25 V THD = 10%, Vol. = 1.25 V Rg = 10 k, Vol. = 0 V, VR = 1 V[rms], fR = 120 Hz Rg = 10 k, Vol. = 0 V PO = 0.5 W, Vol. = 0 V PO = 0.5 W, Vol. = 1.25 V PO = 0.5 W, Vol. = 0.6 V PO = 0.5 W, Vol. = 0.6 V PO = 0.5 W, Vol. = 1.25 V Min 31 2.4 30 -250 70 -1 -3 20.5 40 Typ 45 1 0.10 33 0.10 3.0 50 0 85 0 0 23.5 55 Max 100 10 0.4 35 0.5 250 1 3 26.5 Unit mA A mV[rms] dB % W dB mV dB dB dB dB dB
Note) *: In measuring, the filter for the range of 15 Hz to 30 kHz (12 dB/OCT) is used.
2
ICs for Audio Common Use
I Terminal Equivalent Circuits
Pin No. 1 2 Pin name VCC Ch.1 + output pin Equivalent circuit VCC
AN7522
Voltage 5.0 V 2.15 V
200 1/2 VCC 800
50
2
20 k
3
GND
3
0V
4
Ch.1 - output pin
VCC
2.15 V
200 1/2 VCC 800
50
4
20 k
5
Standby pin
VCC 30 k
To the shock sound prevention circuit
5V
5
10 k 200 2 k 50 k 33 k 5 k
VRF ( VCC)
12 k
1/2 VCC 10 k
To the constant current circuit
3
AN7522
I Terminal Equivalent Circuits (continued)
Pin No. 6 Pin name Ch.1 input pin VCC 50 A 50 A 30 k Equivalent circuit
ICs for Audio Common Use
Voltage VREF1 (1.4 V) 100 A 0 mV to 10 mV
1 k 6
1 k
1 k
500
7
GND
7
0V
8
Ch.2 input pin VCC 50 A 50 A 30 k
VREF1 (1.4 V) 100 A
0 mV to 10 mV
1 k 8
1 k
1 k
500
9
Volume pin
VCC 50 A
1 k 9 12 k
4
ICs for Audio Common Use
I Terminal Equivalent Circuits (continued)
Pin No. 10 Pin name Ch.2 - output pin Equivalent circuit VCC
AN7522
Voltage 2.15 V
200 1/2 VCC 800
50
10
20 k
11
GND
11
0V
12
Ch.2 + output pin
VCC
2.15 V
200 1/2 VCC 800
50
12
20 k
I Usage Notes
* Please avoid the short-circuits to VCC , ground, or load short-circuit. * Please connect the cooling fin with the GND potential. * The thermal shutdown circuit operates at about Tj = 150C. However, the thermal shutdown circuit is reset automatically if the temperature drops. * Please carefully design the heat radiation especially when you take out high power at high VCC . * Please connect only the ground of signal with the signal GND of the amplifier in the previous stage.
5
AN7522
I Technical Data
* PD Ta curves of HSIP012-P-0000A
13 12 11 10 5C/W heat sink Independent IC without a heat sink Rthj-a = 41.7C/W
ICs for Audio Common Use
PD T a
Power dissipation PD (mW)
9 8 7 10C/W heat sink 6 5 4 20C/W heat sink 3 2 1 0 0 25 50 70 75 100 125 150
* Main characteristics PO VCC
8 7 6 f = 1 kHz THD = 10% RL = 8 , 16 400 Hz HPF 30 kHz LPF Both ch. input Rg = 10 k VSTB = 5 V Vol. = 1.25 V
Ambient temperature Ta (C)
ICQ , ISTB VCC
70 60 8.0 50 ICQ 40 7.0 6.0 5.0 30 20 4.0 RL = 8 Both ch. input 3.0 Rg = 10 k VSTB = 0 V/5 V 2.0 Vol. = 0 V ISTB 1.0 6 8 10 12 14 0.0 10.0 9.0
Quiescent circuit current ICQ (mA)
5 4 3
Ch.2 (8 ) 2 1 0 0 2 4 6 8 10 12 14 Ch.1 (8 ) Ch.1, Ch.2 (16 )
10 0
0
2
4
Supply voltage VCC (V)
Supply voltage VCC (V)
PO , THD VIN
10 VCC = 8 V f = 1 kHz RL = 8 400 Hz HPF 30 kHz LPF Both ch. input Rg = 10 k VSTB = 5 V Vol. = 1.25 V 100
PC , ICC PO
3.5 3.0 PC (8 ) 1.8 1.6 1.4 2.5 ICC (8 ) 2.0 PC (16 ) 1.2 1.0 0.8 VCC = 8 V f = 1 kHz RL = 8 , 16 400 Hz HPF 30 kHz LPF Both ch. input Rg = 10 k VSTB = 5 V Vol. = 1.25 V 0.6 0.4 0.2 0.0 5.0
Total harmonic distortion THD (%)
THD (ch.1, 100 kHz) 0.1
THD (ch.2, 100 kHz) 1 THD (ch.2, 10 kHz) THD (ch.1, 10 kHz)
1.5 1.0 ICC (16 ) 0.5 0.0 0.0
0.01
PO (ch.1)
0.1 THD (ch.2, 1 kHz) THD (ch.1, 1 kHz) PO (ch.2)
0.001 1
10
100
0.01 1 000
1.0
2.0
3.0
4.0
Input voltage VIN (mV[rms])
Output power (1-ch) PO (W)
6
Supply current ICC (A)
1
Output power PO (W)
10
Power consumption PC (W)
Standby current ISTB (A)
Output power PO (W)
ICs for Audio Common Use
I Technical Data (continued)
* Main characteristics (continued) GV , PO f
35 34 33 GV (ch.1) GV (ch.2) 32 31 30 29 28 27 26 25 10 100 1 000 10 000 GV(ch.1) 1.4 1.2 1.0 0.8 Both ch. input Rg = 10 k 0.6 VSTB = 5 V Vol. = 1.25 V 0.4 0.2 0.0 100 000 2.0 1.8 1.6
AN7522
THD f
10 VCC = 8 V PO = 0.5 W RL = 8 400 Hz HPF 30 kHz LPF 1 Both ch. input Rg = 10 k VSTB = 5 V Vol. = 1.25 V
GV(ch.2) VCC = 8 V f = 1 kHz RL = 8 400 Hz HPF 30 kHz LPF
Total harmonic distortion THD (%)
Voltage gain GV (dB)
Output power PO (W)
Ch.2 0.1 Ch.1
0.01
10
100
1 000
10 000
100 000
Frequency f (Hz)
Frequency f (Hz)
GV , THD VCC
35 34 33 GV (ch.1) GV (ch.2) 32 31 30 29 28 27 26 25 0 2 THD (ch.2) 4 6 8 10 12 14 THD (ch.1) PO = 0.5 W f = 1 kHz RL = 8 400 Hz HPF 30 kHz LPF Both ch. input Rg = 10 k VSTB = 5 V Vol. = 1.25 V 0.7 0.6 0.5 0.4 0.3 0.2 0.1 0.0 1.0 0.9 80
RR VCC
Ch.1, Ch.2
Ripple rejection ratio RR (dB)
0.8
Total harmonic distortion THD (%)
70 60 50 40 Ch.2 (vol.-max.) 30 20 10 0 Ch.1 (vol.-max.)
Voltage gain GV (dB)
Vol. = 0 V/1.25 V RL = 8 30 kHz LPF VRIPPLE = 0.5 V[rms] Rg = 10k fRIPPLE = 120 Hz VSTB = 5 V
0
2
4
6
8
10
12
14
Supply voltage VCC (V)
Spply voltage VCC (V)
RR VRIPPLE
80 Ch.1, Ch.2 70 70 80
RR fRIPPLE
Ch.1
Ripple rejection ratio RR (dB)
Ripple rejection ratio RR (dB)
60 50 40 30
VCC = 8 V RL = 8 30 kHz LPF Rg = 10 k Ch.2 (vol.-max.)
VSTB = 5 V Vol. = 0 V/1.25 V VRIPPLE = 0.5 V[rms] fRIPPLE = 120 Hz
60 50 40
Ch.2
Ch.2 (vol.-max.) 30 Ch.1 (vol.-max.) 20 10 0 VCC = 8 V VSTB = 5 V RL = 8 Vol. = 0 V/1.25 V Rg = 10 k VRIPPLE = 0.5 V[rms] 10 100 1 000 10 000
Ch.1 (vol.-max.) 20 10 0
10
100
1 000
10 000
Power supply ripple voltage VRIPPLE (mV[rms])
Power supply ripple frequency fRIPPLE (Hz)
7
AN7522
I Technical Data (continued)
* Main characteristics (continued) RR Vol.
80 70
VSTB = 5 V VCC = 8 V RL = 8 VRIPPLE = 0.5 V[rms] 30 kHz LPF fRIPPLE = 120 Hz Rg = 10 k
90 80 70
ICs for Audio Common Use
CT VCC
Ripple rejection ratio RR (dB)
Ch.1 Ch.2
60
Crosstalk CT (dB)
50
Ch.2
60 50 40 30 20 10
40
Ch.1
30 20 10 0
PO = 0.5 W f = 1 kHz RL = 8 400 Hz HPF 30 kHz LPF Rg = 10 k VSTB = 5 V Vol. = 1.25 V 0 2 4 6 8 10 12 14
0.0
0.5
1.0
1.5
0
Volume voltage Vol. (V)
Supply voltage VCC (V)
CT VIN
90 80 70 Ch.1
CT f
90 80 70
Ch.1
Crosstalk CT (dB)
60 50 40 30 20 10 0 VCC = 8 V f = 1 kHz RL = 8 400 Hz HPF 30 kHz LPF Rg = 10 k VSTB = 5 V Vol. = 1.25 V 10 100 1 000
Crosstalk CT (dB)
Ch.2
60 50 40 30 20 10 0 Ch.2 VCC = 8 V PO = 0.5 W RL = 8 Rg = 10 k VSTB = 5 V Vol. = 1.25 V
10
100
1 000
10 000
100 000
Input voltage VIN (mV[rms])
Frequency f (Hz)
VNO VCC
800 RL = 8 Rg = 10 k Din audio filter VSTB = 5 V Vol. = 0 V/1.25 V
800
VNO Rg
VCC = 8 V RL = 8 Din audio filter VSTB = 5 V Vol. = 0 V/1.25 V
Output noise voltage VNO (V[rms])
600 500 400 Ch.2 (vol.-max.) 300 Ch.1 (vol.-max.) 200 Ch.1, Ch.2 100 0
Output noise voltage VNO (V[rms])
700
700 600 500 400 300 200 100 0 Ch.1 (FLAT), Ch.2 (FLAT)
Ch.1 (vol.-max.)
Ch.2 (vol.-max.)
Ch.1 (FLAT) Ch.2 (FLAT)
Ch.1, Ch.2
0
2
4
6
8
10
12
14
10
100
1 000
10 000
100 000
Supply voltage VCC (V)
Input impedance Rg ()
8
ICs for Audio Common Use
I Technical Data (continued)
* Main characteristics (continued) VNO Vol.
1 200 0.10 0.09 Ch.2 (FLAT) Ch.1 (FLAT) 800 VCC = 8 V RL = 8 Rg = 10 k Din audio filter VSTB = 5 V
AN7522
ICQ VSTB
VCC = 8 V RL = 8 Rg = 10 k Vol. = 0 V
Output noise voltage VNO (V[rms])
Quiescent circuit current ICQ (A)
1 000
0.08 0.07 0.06 ICQ 0.05 0.04 0.03 0.02 0.01
600
400
200
Ch.1, Ch.2
0 0.0
0.2
0.4
0.6
0.8
1.0
1.2
1.4
0.00
0
1
2
3
4
5
Volume voltage Vol. (V)
Standby voltage VSTB (V)
Att VCC
100
100
Att VIN
90
90
Volume attenuation Att (dB)
Volume attenuation Att (dB)
Ch.1 80 Ch.2 70 VCC = 8 V f = 1 kHz RL = 8 400 Hz HPF 30 kHz LPF Rg = 10 k VSTB = 5 V Vol. = 0 V 1 10 100 1 000
80
Ch.1, Ch.2
70 PO = 0.5 W f = 1 kHz RL = 8 400 Hz HPF 30 kHz LPF Rg = 10 k VSTB = 5 V Vol. = 0 V 0 2 4 6 8 10 12 14
60
60
50
50
40
40
Supply voltage VCC (V)
Input voltage VIN (mV[rms])
Att f
100 95 0 10
Att Vol.
Volume attenuation Att (dB)
Volume attenuation Att (dB)
90 85 Ch.1, Ch.2 80 75 70 65 60 55 50 10 100 1 000 VCC = 8 V PO = 0.5 W RL = 8 Rg = 10 k VSTB = 5 V Vol. = 0 V
20 Ch.1, Ch.2 30 40 50 60 70 80 90 VCC = 8 V PO = 0.5 W f = 1 kHz RL = 8 400 Hz HPF 30 kHz LPF Rg = 10 k VSTB = 5 V
10 000
100 000
0.0
0.2
0.4
0.6
0.8
1.0
1.2
1.4
Frequency f (Hz)
Volume voltage Vol. (V)
9
AN7522
I Technical Data (continued)
* Main characteristics (continued) THD Vol.
10 VCC = 8 V PO = 0.5 W f = 1 kHz RL = 8 1 400 Hz HPF 30 kHz LPF Rg = 10 k VSTB = 5 V
100
ICs for Audio Common Use
GV VIN
Total harmonic distortion THD (%)
Voltage gain GV (dB)
Ch.1, Ch.2
Ch.1, Ch.2
10
0.1
VCC = 8 V f = 1 kHz RL = 8 400 Hz HPF 30 kHz LPF
Both ch. input Rg = 10 k VSTB = 5 V Vol. = 1.25 V
0.01
0.0
0.2
0.4
0.6
0.8
1.0
1.2
1.4
1
1
10
100
1 000
10 000
Volume voltage Vol. (V)
Input voltage VIN (mV[rms])
* Example of PCB pattern
GND VCC Ch.1 out+ Ch.1 out- Ch.2 out+ Ch.2 out- GND (input) VIN (ch.2) Mute/Volume VIN (ch.1) Standby 1 2 3 4 5 6 7 8 9 10 11 12
I Application Circuit Example
10
11
1.0 F
1.0 F
270 k
68 k
10 k
470 F
10 F
VCC
Standby VIN1
VIN2
10 k
8 Out 1
8 Out 2
Volume
10
12
1
2
3
4
5
6
7
8
9

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