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| ICs for Audio Common Use AN7551Z Power IC for BTL car audio s Overview The AN7551Z is an audio power IC developed as a car audio output (35 W x 4-ch). CR to stop oscillation is built in between the output pin and GND so that a space saving of set is possible. Also, it is incorporating a perfect muting circuit which does not make a shock noise so that a shock noise design in the set transitional state can be made easily when used together with its standby function. In addition, it is incorporating various protective circuits to protect the IC from destruction by GND-open earth short-circuiting and power supply surge which are the important subject of power IC, and the IC will largely contribute to a high reliability design of equipment. 31.00.3 27.00.3 21.00.1 (10.50) (10.50) 3.60.1 Unit : mm 4.50.2 3.60.1 1.50.1 3.750.10 14.50.3 15.50.3 R1.80.1 (1.26) 1.27 0.6 - 0.1 +0.2 (5.08) (4.29) 0.40 - 0.05 +0.15 (2.15) Seating plane s Features * Pin arrangement which does not allow the input/output patterns to intersect each other so that it is possible to make a pattern design on a one-sided printed circuit board. * Incorporating various protection circuits (thermal protection, short-circuit to VCC , short-circuit to VCC in VCCopened, short-circuit to GND, short-circuit to GND in GND-opened, over voltage, power supply surge, and ASO protection, etc.) * Incorporating standby function (shock noise-free at STBon/off) * Incorporating standby function (shock noise-free at Mute-on/off) * External components reduction * Provided with beep sound input pin * Equipped with auxiliary sound input pin * Inverted pin layout of AN7550NZ on right and left pins HZIP025-P-0980 s Applications * Car stereo, miniature audio component, karaoke and other audio equipment. (1.95) 33.00.3 33.360.30 (3.30) (5.70) 1 25 2.40.5 18.750.30 (24.45) 1 AN7551Z s Block Diagram VCC VCC ICs for Audio Common Use 22 14 1 5 7 Ripple Filter Protection Circuit Beep Input 10 25 GND (Output) 24 23 17 18 15 GND (Output) 21 GND (Output) 20 19 Attenuator AUX Input Attenuator Attenuation Control 13 12 11 GND (Output) 16 6 3 8 2 9 GND (Input) Beep AUX s Pin Descriptions Pin No. 1 2 3 4 5 6 7 8 9 10 11 12 13 Ripple filter Mute ch.3 input GND (Sub) ch.4 input GND (Input) ch.2 input Beep input ch.1 input Standby ch.1 - output GND (ch.1 output) ch.1 + output Description Pin No. 14 15 16 17 18 19 20 21 22 23. 24 25 ch.2 - output AUX input ch.2 + output GND (ch.2 output) ch.3 - output GND (ch.3 output) ch.3 + output Supply voltage VCC ch.4 - output GND (ch.4 output) ch.4 + output Description Supply voltage VCC Note) The output pin requires no capacitor and resistor for oscillation prevention. If those are required for countermeasure against noise, be sure to use after confirmation. 2 GND (Sub) Muting 4 ICs for Audio Common Use s Absolute Maximum Ratings Parameter Supply voltage *2 *3 AN7551Z Symbol VCC VSurge ICC Rating 25 65 12 59 -30 to +85 -55 to +150 Unit V V A W C C Peak power-supply-voltage Supply current Power dissipation *4 PD *1 Operating ambient temperature Storage temperature *1 Topr Tstg Note) *1 : Ta = 25 C except power dissipation, operating ambient temperature and storage temperature. *2 : Without signal *3 : Time = 0.2 s *4 : Ta = 85 C s Recommended Operating Range Parameter Supply voltage Symbol VCC Range 8.0 to 18.0 Unit V s Electrical Characteristics at VCC = 13.2 V, freq = 1 kHz, Ta = 25 C Parameter Quiescent circuit current Standby current Output noise voltage Voltage gain Total harmonic distortion 1 Maximum output power Ripple rejection ratio Channel balance Crosstalk Output offset voltage Muting effect *1 *1 *1 Symbol ICQ ISTB VNO GV THD1 PO RR CB CT VOFF MT ZI VS Conditions RG = 10 k, RL = 4 RG = 10 k, RL = 4 RG = 10 k, RL = 4 VIN = 40 mV, RL = 4 VIN = 40 mV, RL = 4 THD = 10 %, RL = 4 RL = 4 , RG = 10 k, VR = 1 Vrms , fr = 1 kHz VIN = 40 mV, RL = 4 VIN = 40 mV, RL = 4 RG = 10 k RG = 10 k, RL = 4 VIN = 40 mV, RL = 4 VIN = 0.3 VDC RL = 4 , RG = 10 k, VMUTE = 5 V, VSTB = On/Off 50 Hz HPF Min 32 16.0 60 60 -250 70 24 -100 Typ 300 1 0.15 34 0.05 19.5 68 0 70 0 86 30 0 Max 450 10 0.5 36 0.2 1 250 36 Unit mA A mVrms dB % W dB dB dB mV dB k Input impedance Shock noise *2 100 mV[p-0] Note) *1 : Use 15 Hz to 30 kHz (12 dB/OCT) band-pass filter at measurement. *2 : Change over the standby pin at 0V and 5V with the following time. Standby pin voltage 5V 0V 500 ms 500 ms 3 AN7551Z ICs for Audio Common Use s Electrical Characteristics at VCC = 9 V, Ta = 25 C (continued) Parameter Total harmonic distortion 2 Mute-on threshold voltage Mute-off threshold voltage Cutoff frequency Symbol THD2 MTON MTOFF fC Conditions VIN = 20 mV, fIN = 20 kHz, RG = 10 , RL = VIN = 40 mV, RL = 4 VIN = 40 mV, RL = 4 VIN = 40 mV, RL = 4 GV = -1 dB (0 dB : 1 kHz) Min 4 20 Typ 0.1 40 Max 0.5 0.8 Unit % V V kHz * Design reference data at VCC = 13.2 V, f = 1 kHz, measuring bandwidth 15 Hz to 30 kHz (12 dB/OCT) filter is used Note) The characteristic values below are theoretical values for designing and not guaranteed. Parameter Maximum output power Maximum output power Maximum output power Power band Symbol POmax PO2 POmax2 fPL Conditions max. power, RL = 4 VCC = 14.4 V, THD = 10 %, RL = 4 VCC = 14.4 V, max. power, RL = 4 VCC = 14.4 V, THD = 1 %, RL = 4 , POL = -3 dB (1 kHz : 0 dB) VCC = 14.4 V, THD = 1 %, RL = 4 , POH = -3 dB (1 kHz : 0 dB) RG = 10 k, RL = 4 , STBACT RG = 10 k, RL = 4 , ACTSTB Min Typ 28 21 34 10 Max Unit W W W Hz Power band fPH 18 kHz STB threshold voltage STB threshold voltage VSTB1 VSTB2 2.2 1.5 V V 4 ICs for Audio Common Use s Terminal Equivalent Circuits Pin No. 1 VCC 15 k AN7551Z Equivalent circuit Description Ripple filter pin: Output current from 3 mA to 10mA DC Voltage 13 V 1 1.7 mA 20 k 350 A 2 2 200 Mute pin : Mute switchover pin Threshold voltage about 2.1 V 0V 10 k 100 k 3 3 200 600 30 k abt. 15 A abt. 15 A ch.3 input pin : ch.3 input signal application pin Input impedance 30 k 0 mV to 10 mV 4 5 200 5 GND (circuit board) : Circuit board ch.4 input pin : ch.4 input signal application pin Input impedance 30 k 0V 0 mV to 10 mV abt. 15 A 600 abt. 15 A 30 k 5 AN7551Z s Terminal Equivalent Circuits (continued) Pin No. 6 7 7 200 600 abt. 15 A abt. 15 A ICs for Audio Common Use Equivalent circuit Description GND (input) : Grounding pin for input ch.2 input pin : ch.2 input signal application pin Input impedance 30 k Voltage 0V 0 mV to 10 mV 30 k 8 VREF = 6.3 V Beep input 8 13 k 600 600 15 k 13 Beep sound input pin : Beep sound signal input pin Input impedance 15 k 0V 2 k 2 k 2 k 17 VREF = 6.3 V 600 600 15 k 9 9 200 600 abt. 15 A abt. 15 A ch.1 input pin : ch.1 input signal application pin Input impedance 30 k 0 mV to 10 mV 30 k 10 10 10 k Standby control pin : Standby switch over pin Threshold voltage about 2.1 V 5V 2 k 6 ICs for Audio Common Use s Terminal Equivalent Circuits (continued) Pin No. 11 14 Drive circuit Pre-amp. 11 AN7551Z Equivalent circuit Description ch.1 output pin (-) : ch.1 negative phase output pin Voltage 6.3 V Drive circuit 12 15 k 600 12 13 GND (output) : Grounding pin for ch.1 output ch.1 output pin (+) : ch.1 positive phase output pin Pre-amp. 0V 6.3 V 14 Drive circuit 13 Drive circuit 12 15 k VREF = 6.3 V 600 14 15 14 Power supply voltage pin : Power supply connection pin ch.2 output pin (-) : ch.2 negative phase output pin Pre-amp. 13.2 V 6.3 V Drive circuit 15 Drive circuit 18 15 k 600 16 VREF = 6.3 V 600 600 16 10 k 15 k 17 AUX input pin : Input impedance 10.6 k 6.3 V 7 AN7551Z s Terminal Equivalent Circuits (continued) Pin No. 17 14 Drive circuit Pre-amp. 17 ICs for Audio Common Use Equivalent circuit Description ch.2 output pin (+) : ch.2 positive phase output pin Voltage 6.3 V Drive circuit 18 15 k VREF = 6.3 V 600 18 19 22 GND (output) : Grounding pin for ch.2 output ch.3 output pin (-) : ch.3 negative phase output pin 0V 6.3 V Drive circuit Pre-amp. 19 Drive circuit 20 15 k VREF = 6.3 V 600 20 21 GND (output) : Grounding pin for ch.3 output ch.3 output pin (+) : ch.3 positive phase output pin Pre-amp. 0V 6.3 V 22 Drive circuit 21 Drive circuit 24 15 k VREF = 6.3 V 600 22 Power supply voltage pin : Power supply connection pin 13.2 V 8 ICs for Audio Common Use s Terminal Equivalent Circuits (continued) Pin No. 23 22 Drive circuit Pre-amp. 23 AN7551Z Equivalent circuit Description ch.4 output pin (-) : ch.4 negative phase output pin Voltage 6.3 V Drive circuit 24 15 k 600 24 25 22 GND (output) : Grounding pin for ch.4 output ch.4 output pin (+) : ch.4 positive phase output pin 0V 6.3 V Drive circuit Pre-amp. 25 Drive circuit 24 15 k VREF = 6.3 V 600 9 AN7551Z s Application Circuit Example VCC 1 F 10 k 2200 F ICs for Audio Common Use 10 k 1 F 22 14 1 33 F 4 5 7 10 17 18 15 13 12 11 4 4 25 24 23 21 4 20 19 16 6 3 8 2 9 1 F 10 k 22 k 1 F 10 k Beep Muting 5V 0V 5V s Usage notes 1. Be sure to use the circuit with an external heat-sink and fix the external heat-sink on chassis when using it. 2. Connect the heat radiating fin to GND potential. 3. This IC has built-in protection circuit against short-circuit to VCC , short-circuit to GND and ASO. However avoid short-circuit to VCC , short-circuit to GND and short-circuit of load. 4. The thermal protection circuit operates at Tj = about 150 C but it automatically returns to the normal operation when the temperature decreases. 5. The over voltage protection circuit operates at VCC = about 20 V. 6. Be especially careful to heat radiation design when used at an increased VCC. 7. Connect the beep sound input pin to GND when the beep sound function is not used. 8. Do not lower the beep sound input pin below - 0.3 V. 9. Keep AUX input pin in open state when AUX function is not used. 10. Connect only GND pin (signal source) to the signal GND of the amplifier in previous stage. * There is a possibility of device destruction under the following conditions; 1. If the power supply pin and GND pin are connected in reverse to the power supply. 2. If the power supply pin and GND pin are in open state and the power supply is connected across the output pins. 3. If the output pin is grounded when GND pin is open. 4. If more than three output pins are grounded to the earth at a time with more than 1.3 short-circuiting resistor with which the protection circuit does not operate. 5. If plus and minus output pins are short circuited to the supply line at a time with more than 1 short-circuiting resistor with which the protection circuit does not operate. 6. If the RF pin and the output pin are short circuited and short-circuited to the earth. 10 AUX 1 F 4 ICs for Audio Common Use s Technical Information * HZP025-P-0980 package power dissipation PD T a 120 113.6 With an infinitely heat-sink Rth(j - c) = 1.1 C/ W Rth(j - a) = 31.1 C/ W AN7551Z 100 Power dissipation PD (W) 80 1 C / W heat-sink 59.5 2 C / W heat-sink 40.3 40 5 C / W heat-sink 20.5 Package without heat-sink 4.02 0 0 25 50 75 100 125 150 60 20 Ambient temperature Ta (C) 11 |
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