ICs for Audio Common Use AN7555NZ BTL output power IC for car audio ■ Overview 31.0±0.3 27.0±0.3 21.0±0.1 (10.50) (10.50) 25 1.27 0.6 +0.2 –0.1 (5.08) (4.29) (3.30) (5.70) 2.4±0.5 18.75±0.30 (24.45) 14.5±0.3 15.5±0.3 1 0.40 +0.15 –0.05 (2.15) (1.26) 1.5±0.1 33.0±0.3 33.36±0.30 Seating plane (1.95) R1.8±0.1 4.5±0.2 φ3.6±0.1 3.75±0.10 Unit: mm 3.6±0.1 The AN7555NZ is an audio power IC developed as the sound output of car audio (35 W × 4-channel). It has realized the voltage gain of 40 dB based on the AN7560Z (voltage gain: 34 dB). A capacitor and resistor to stop oscillation are built in between the output pin and GND so that a space saving of set is possible. Also, it incorporates a perfect muting circuit without shock noise, so that a shock noise design under the set transient condition can be made easily when used together with its standby function. In addition, it incorporates various protection circuits to protect the IC from destruction by GND-open short circuit to ground, and power supply surge which are the important subject of power IC protection. This IC will largely contribute to a high reliability design of the equipment. HZIP025-P-0980 ■ Features • A pattern layout in which input and output pattern do not intersect each other on single-sided printed circuit board is possible. • Incorporating various protection circuits (temperature protection, short circuit to VCC , VCC-open short circuit to VCC , short circuit to GND, GND-open short circuit to GND, overvoltage, power supply surge, and ASO, etc.) • Built-in standby function (shock-noise free at STB-on/ off) • Built-in muting function (shock-noise free at Mute-on/ off) • External components reduction • Provided with beep sound input pin • Equipped with auxiliary sound input pin • Voltage gain: 40 dB (AN7560Z/AN7561Z: Voltage gain: 34 dB) ■ Applications • Car stereo, miniature audio component, karaoke and other audio equipment 1 AN7555NZ ICs for Audio Common Use 25 19 VCC 12 4 21 VCC ■ Block Diagram 16 Ripple filter 1 2 GND (output) 3 9 8 GND (output) 11 Protection circuit Beep input 5 6 GND (output) 7 13 14 GND (output) 15 Attenuation control AUX input 22 GND (sub) 17 Attenuator AUX Muting 10 24 18 Beep GND (input) 20 23 Attenuator ■ Pin Descriptions Pin No. Description Pin No. Description 1 Ch.4 + output 14 GND (ch.1 output) 2 GND (ch.4 output) 15 Ch.1 − output 3 Ch.4 − output 16 Standby 4 Supply voltage VCC 17 Ch.1 input 5 Ch.3 + output 18 Beep input 6 GND (ch.3 output) 19 Ch.2 input 7 Ch.3 − output 20 GND (input) 8 GND (ch.3 output) 21 Ch.4 input 9 Ch.2 + output 22 GND (printed circuit board) 10 AUX input 23 Ch.3 input 11 Ch.2 − output 24 Muting 12 Supply voltage Vcc 25 Ripple filter 13 Ch.1 + output Note) It is not necessary to connect capacitor and resistor for stopping the oscillation at the output terminals. Use them after check if necessary for noise countermeasure. 2 ICs for Audio Common Use AN7555NZ ■ Absolute Maximum Ratings Parameter Supply voltage Symbol Rating Unit VCC 25 V Vsurge 65 V ICC 12 A PD 59 W Topr −30 to +85 °C Tstg −55 to +150 °C *2 Peak supply voltage *3 Supply current Power dissipation *4 Operating ambient temperature Storage temperature Note) *1 : *2 : *3 : *4 : *1 *1 Ta = 25°C except operating ambient temperature and storage temperature. Without signal Time = 0.2 s Power dissipation at Ta = 85°C ■ Recommended Operating Range Parameter Supply voltage Symbol Range Unit VCC 8.0 to 18.0 V ■ Electrical Characteristics at VCC = 13.2 V, f = 1 kHz, Ta = 25°C Parameter Symbol Conditions Min Typ Max Unit ICQ Rg = 10 kΩ, RL = 4 Ω 300 450 mA ISTB Rg = 10 kΩ, RL = 4 Ω 1 10 µA VNO Rg = 10 kΩ, RL = 4 Ω 0.25 0.5 mV[rms] GV VIN = 20 mV, RL = 4 Ω 38 40 42 dB THD1 VIN = 20 mV, RL = 4 Ω 0.05 0.2 % PO THD = 10%, RL = 4 Ω 16 19.5 W RR RL = 4 Ω, Rg = 10 kΩ, VR = 1 V[rms], fR = 1 kHz 55 65 dB Channel balance CB VIN = 20 mV, RL = 4 Ω 0 1 dB Cross-talk CT VIN = 20 mV, RL = 4 Ω, Rg = 10 kΩ 60 70 dB −300 0 300 mV Quiescent current Standby current Output noise voltage *1 Voltage gain Total harmonic distortion 1 Maximum output power Ripple rejection *1 Output offset voltage Muting effect *1 Input impedance Shock noise *2 VOFF Rg = 10 kΩ, RL = 4 Ω MT VIN = 20 mV, RL = 4 Ω 70 80 dB ZI VIN = ±0.3 VDC 24 30 36 kΩ VS RL = 4 Ω, Rg = 10 kΩ, VMUTE = 5 V, VSTB = on/off, 50 Hz HPF −100 0 100 mV[p-0] Note) *1 : Measurement using a bandwidth 15 Hz to 30 kHz (12 dB/OCT) filter. *2 : Change over the standby terminal at the time shown in the right. 5V Standby terminal voltage 0V 500 ms 500 ms 3 AN7555NZ ICs for Audio Common Use ■ Electrical Characteristics at VCC = 13.2 V, f = 1 kHz, Ta = 25°C (continued) Parameter Symbol Conditions Min Typ Max Unit Total harmonic distortion 2 THD2 VIN = 10 mV, fIN = 20 kHz, Rg = 10 Ω, RL = ∞ 0.1 0.5 % Mute-on threshold voltage MTON VIN = 20 mV, RL = 4 Ω 4 V Mute-off threshold voltage MTOFF VIN = 20 mV, RL = 4 Ω 0.8 V VIN = 20 mV, RL = 4 Ω, GV = −1 dB (0 dB: 1 kHz) 20 40 kHz Min Typ Max Unit Max. power, RL = 4 Ω 28 W PO2 VCC = 14.4 V, THD = 10%, RL = 4 Ω 21 POmax2 VCC = 14.4 V, max. power, RL = 4 Ω 34 fPL VCC = 14.4 V, THD = 1%, RL = 4 Ω, PoL = −3 dB (1 kHz: 0 dB) 10 Hz fPH VCC = 14.4 V, THD = 1%, RL = 4 Ω, PoH = −3 dB (1 kHz: 0 dB) 18 kHz VSTB1 Rg = 10 kΩ, RL = 4 Ω, STB → ACT 2.2 V VSTB2 Rg = 10 kΩ, RL = 4 Ω, ACT → STB 1.5 Cutoff frequency fC • Design reference data Note) The characteristic values below are theoretical values for designing and not guaranteed. Parameter Symbol Maximum output power POmax Power band width STB threshold voltage Conditions ■ Usage Notes 1. Always attach an outside heat sink to use the AN7555NZ. In addition, the outside heat sink must be fastened onto a chassis for use. 2. Connect the radiation fin to the GND potential. 3. Prevent short circuit to VCC and short circuit to GND, and load short-circuit although the protection circuits for short circuit to VCC and ASO are built-in. 4. The thermal protection circuit gets actuated when Tj = approx. 150°C, but it is automatically reset when the chip temperature drops below the above set level. 5. The overvoltage protection circuit starts the protection operation at VCC = approx. 20 V. 6. Take into consideration the heat radiation design particularly when VCC is set high. 7. When the beep sound function is not used, connect to GND the beep sound input pin. 8. Don't down below − 0.3 V for the beep sound input pin. 9. When the AUX function is not used, open the AUX input pin. 10. Connect to signal GND of pre-stage amplifier only for the signal source ground. • There are the possibility of breakdown for the following conditions. 1. Reverse connection of the power supply pin and the GND pin. 2. Connection of the power supply between output pins at open condition of the power supply pin and the GND pin. 3. Short circuit to GND of output pin when the GND pin is open. 4. Short circuit to GND of above the three output pins at the same time with a shorting resistor which does not operate the protection circuit. 5. Short circuit to GND of above the plus and minus output pins at the same time with a shorting resistor which does not operate the protection circuit. 6. Short circuit to ground with shorting the RF pin and the output pin. 4 ICs for Audio Common Use AN7555NZ ■ Technical Information • PD Ta curves of HZIP025-P-0980 PD T a 1.800 1.770 1.600 Mounted on standard board (grass epoxy : 50 mm × 50 mm × t0.08 mm) Rth (j−a) = 70.6 °C/W Power dissipation PD (W) 1.400 1.200 1.075 1.000 0.800 Independent IC without heat shink Rth( j−a) = 116.2°C/W 0.600 0.400 0.200 0.000 0 25 50 75 100 125 150 Ambient temperature Ta (°C) 10 kΩ 19 12 4 11 5 13 6 14 7 15 1 µF 10 kΩ 1 µF 4Ω AUX 22 kΩ 5V Beep 0V Muting 18 10 kΩ 4Ω 22 3 17 8 10 9 2 24 1 23 4Ω 16 1 µF 4Ω 25 20 33 µF VCC 1 µF 2 200 µF 21 10 kΩ 1 µF ■ Application Circuit Example 5