ICs for Audio Common Use
AN7164N
BTL 47W Audio Power Amplifier Circuit
s Overview
The AN7164N is an integrated circuit designed for 47W (VCC = 26.4V, 8Ω) output power amplifier. High power output (BTL 47W), low distortion and low noise are realized. High reliability is obtained due to same kinds of protectors built in. Furthermore, ON/OFF is enabled even if power is supplied to power supply pin by stand-by circuit.
Unit : mm 5.9±0.25 7.7±0.3 7.8±0.25 ø 3.6 12
29.96±0.3 28.0±0.3 20.0±0.2
0.6±0.1
s Features • High output power • Low distortion, low noise • Low shock noise from power ON/OFF operation • Incorporates stand-by circuits • Incorporates protection circuits
(Temperature, Overcurrent, Load Short, Output – GND Short)
R1.8
0.6
1 0.35 – 0.05 1.2±0.1 3.5±0.3 10 7
+ 0.1
12-Lead SIP Package with Fin (Power Type) (HSIP012-P-000A)
s Pin Descriptions
Pin No. 1 2 3 4 5 6 Pin Name Ripple Filter NFB Ch.2 GND (Input) NFB Ch.1 Input Stand-by Pin No. 7 8 9 10 11 12 Pin Name Output Ch.1 Bootstrap Ch.1 GND (Output) Output Ch.2 Bootstrap Ch.2 VCC
s Block Diagram
VCC 2 11 12
6
Input Circuit
Driver Circuit Protection
Output Circuit
1
Ripple Filter
Over Temp. Load Short Overcurrent
Output-GND Short
5
Input Circuit
Driver Circuit
Output Circuit
3 GND
4
8
9 GND
2.54
29.6±0.3
AN7164N
s Absolute Maximum Ratings (Ta= 25˚C)
Parameter Supply Voltage Supply Current Peak Supply Voltage Power Dissipation Operating Ambient Temperature Storage Temperature Note) Non-Signal Symbol VCC ICC VCC (surge) PD Topr Tstg
ICs for Audio Common Use
Rating 32 Note) 5 55 62.5 – 30 ~ + 75 – 55 ~ + 150
Unit V A V W ˚C ˚C
s Recommended Operating Range (Ta= 25˚C)
Parameter Operating Supply Voltage Range Symbol VCC Range 8.3V ~ 30V
s Electrical Characteristics (VCC= 26.4V, RL= 8Ω, f= 1kHz, BTL Operation, Ta= 25˚C)
Parameter Quiescent Circuit Current Output Noise Voltage Output Offset Voltage Total Harmonic Distortion Voltage Gain Maximum Output Power Ripple Rejection Ratio Stand-by Current Stand-by Threshold Voltage Note) With DIN/AUDIO filter Symbol ICQ Vno VO (offset) THD GV Po RR ISTB Vth (STB) Vin= 0V Rg= 10kΩ Note) Vin= 0V PO= 1W PO= 1W THD= 10% Rg= 0Ω, Supply Ripple 1Vrms, 120Hz Sine Wave Note) Piny Open DC Voltage of Piny at ICQ= less than 1mA 49.5 40 45 Condition min. typ. 55 0.9 0 0.06 51.5 47 48 0.1 2.7 30 max. 100 1.5 300 0.3 53.5 Unit mA mV mV % dB W dB µA V
s Characteristics Curve
PD – Ta
(62.5) 60 Rth (j – c) = 2˚C/W Rth (j – a) = 42˚C/W
ts ink fin In ity a he
50 Power Dissipation PD (W) (41.7) 40 (31.3) 30 (25.0) 20 (17.9) (10.4) 10 (3.0) 0
1˚
C/
W
he
at
2˚C
sin
/W
k
3˚C
/W
hea
hea
5˚C/
Wh
t si nk t si nk
eat s
10˚C/W
No heat sink 0 25
ink heat si nk
50
75
100
125
150
Ambient Temperature Ta (˚C)
ICs for Audio Common Use
s Characteristics Curve
Po – VCC
Total Harmonic Distortion THD (%) Voltage Gain GV (dB) 60 THD = 10% 50 53 52 51 50 49 hysteresis present GV 4 f = 1kHz PO = 0.75W RL = 8Ω Gain (0dB = 51.5dB) 0 Gain Response (dB) –4 –8 –12 –16 –20 f = 1kHz 0 8 16 24 32 40 100 1k
AN7164N
GV, THD – VCC
Gain Response, THD – fIN
VCC = 26.4V RL = 8Ω VIN = 6.6mV At VO = 0dB PO = 0.75W 1.0 0.8 0.6 0.4 THD 0.2 0
40
30 RL = 8Ω
0.5 0.4 0.3 0.2 0.1 0 f = 10kHz THD PO = 0.75W RI = 8Ω
20
10
0
4
8
12
16
20
24
28
32
36
10k
100k
Supply Voltage VCC (V)
Supply Voltage VCC (V)
Input Frequency fIN (Hz)
PO, THD – VIN
1000 GV = 51.5dB fIN = 1kHz 300 VCC = 26.4V RL = 8Ω 100 Output Power Po (W) 30 10 3 1 0.3 0.1 0.1 PO THD 10 Total Harmonic Distortion THD (%) 3 1.0 0.3 0.1 0.03 0.01 100 120 Quiescent Circuit Current ICQ (mA) 100
ICQ, Voffset – VCC
5.0
Vno – Rg
GV = 51.5dB (f = 1kHz) 4.0 20 0 Output Noise Voltage Vno (mV)
Voffset 80 60 ICQ 40 20 0 – 60 – 80 – 20 – 40
Offset Voltage Voffset (mV)
3.0
2.0 Without filter 1.0 With DIN/And1V filter 0 0 100 1k 10k ∞
0.3
1
3
10
30
0
10
20
30
40
50
Input Frequency VIN (mV)
Supply Voltage VCC (V)
Source Resistance Rg (Ω)
RR – VCC
100 fripple = 120Hz Note) 60 Vripple = 0.5Vrms Ripple Rejection Rate RR (dB) 50 40 30 20 10 0 Vripple = 1Vrms Measured with heat sink open Grounding the heat sink increases RR by about 1 dB (improvement). 90 80 Ripple Rejection Rate RR (dB)
RR – fripple
100 VCC = 26.4V Vripple = 1.0Vrms Ripple Rejection Rate RR (dB) 90 80 70 60 50 40 30 20 10 50 100 200 300 500 1k 0 0.2 0.3
RR – Vripple
VCC = 26.4V fripple = 120Hz
70 60 50 40 30 20 10
0
10
20
30
40
50
0 10 20 30
0.5
1.0
2
4
Supply Voltage VCC (V)
Ripple Frequency fripple (Hz)
Ripple Voltage Vripple (Vrms)
Total Harmonic Distortion THD (%)
Output Power Po (W)
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