AN7077Z

ICs for Audio Common Use AN7077Z Power supply and boost IC for class-H power amplifier s Overview A BTL 50 W × 2 -channel (maximum. 75 W × 2 channel) class-H power amplifier can be made up by combining the power supply boost amplifier AN7077Z and the single power supply BTL audio power amplifier AN7194Z, and it is possible to make a low consumption power system. 18.00±0.30 13.50±0.30 Unit : mm 4.00±0.20 1.50±0.10 φ3.60±0.10 • Incorporating various protection circuits • Built-in standby circuit • Peak detection circuit : Limits class-H operation at high frequency • Built-in timer circuit If a current larger than allowable value continues to flow into the power supply transformer, this circuit stops the class-H operation to prevent the transformer from damage by a fire. • Built-in mute function • Built-in LED driver 1 1.27 +0.20 0.50−0.10 15 (0.61) (1.80) (2.54) 19.00±0.30 19.30±0.30 2.40±0.50 R0.55 (1.95) +0.15 0.25−0.05 s Features HZIP015-P-0745A s Applications • Miniature audio component, CD player radio cassette, karaoke and other audio equipment 13.25±0.30 15.65±0.50 18.95±0.50 10.0±0.30 3.25±0.10 1 AN7077Z s Block Diagram 14 ICs for Audio Common Use 1 VCCH 12 LED driver ASO 6 Peek det. Level shift 4 VBE VIN 8 IOUT det. 15 10 kΩ Level shift 1 VBE 9 24 V clamp 11 15 µA Mute Class-H mute 4 VRF = 6 V 13 0.3 V 6V 2 5 µA VRF 3 Constant current 10 7 STB s Pin Descriptions Pin No. 1 2 3 4 5 6 7 8 Description Power supply N.C. Timer current setting Current detection Timer Peak detection GND Input Pin No. 9 10 11 12 13 14 15 NF Standby Muting LED Ripple filter ASO Output Description 2 GND 5 ICs for Audio Common Use s Absolute Maximum Ratings Parameter Supply voltage Supply current Power dissipation *3 *1 *2 AN7077Z Symbol VCC ICC PD Topr Tstg Rating 34 9.0 68.2 −25 to +75 −55 to +150 Unit V A W °C °C Operating ambient temperature Storage temperature *1 Note) *1 : Ta = 25°C except operating ambient temperature and storage temperature. *2 : Without input signals (output current 0 mA). *3 : The value when Rth(j-c) = 1.1°C/W, Ta = 75°C. s Recommended Operating Range Parameter Supply voltage Symbol VCC Range 10.0 to 28.0 Unit V s Electrical Characteristics at VCCH = 24.0 V, VCCL = 12 V, frep. = 1 kHz, Ta = 25°C Parameter Quiescent current Standby current Output offset voltage 1 Output offset voltage 2 Output current Voltage gain Pin 4 output current Pin 5 output current 1 Pin 5 output current 2 LED output current Standby terminal current Symbol ICQ ISTB VOFF1 VOFF2 IOUT GV IDET ITI1 ITI2 ILED ICQ-STB VIN = open VIN = open VIN = 8 V, RL = 4 Ω VIN = 16 V, RL = 4 Ω VIN = 14 V, RL = 2 Ω VIN = 3 Vrms (DC 15 V), RL = 4 Ω IOUT = 2 A Pin 4 = high, pin 5 = 3 V Pin 4 = low, pin 5 = 3 V VIN = 1 Vrms (DC 16 V), VLED = 8 V VIN = open, VSTB = 5 V Conditions Min   2.0 2.5 7.0 −1.0 150 13 4.5 15 500 Typ 25 1 2.5 3.0 8.0 0.0 190 15 5 30 650 Max 50 10 3.0 3.5  1.0 230 17 5.5  800 Unit mA µA V V A dB µA µA µA mA µA 3 AN7077Z s Usage Notes ICs for Audio Common Use 1. Always attach an outside heat sink to use the chip. In addition, the outside heat sink must be fastened onto a chassis for use. 2. Connect the radiation fin to GND potential. 3. Avoid short circuit to VCC and short circuit to GND, and load short-circuit 4. The thermal protection circuit will be actuated at TJ = approx. 145°C, but it is automatically reset when the chip temperature drops below the above set level. 5. The overvoltage protection circuit starts its operation at VCC = approx. 36 V. 6. The protection circuit between V CC a nd the output starts its operation when the V CC − o utput voltage = approx. 18 V. 7. For the standby voltage, use a stabilized power supply of 3 V or more. s Technical Information • PD  TA curves of HZIP015-P-0745A PD  T A 120 Infinite heat sink 113.6 100 Rth(j-c) = 1.1°C/W Rth(j-a) = 68.3°C/W Allowable power dissipation PD (W) 80 60 59.5 1°C/W heat sink 40.3 2°C/W heat sink 40 30.5 3°C/W heat sink 20.5 5°C/W heat sink 20 11.3 10°C/W heat sink 1.8 Without heat sink 0 0 25 50 75 100 125 150 Ambient temperature Ta (°C) 4 2.2 Ω 0.22 µF 0.22 µF 1 500 pF Off Mute On Active high 2.2 Ω 2 4 3 100 µF 12 8 6 13 11 12 10 µF 5 STB 8 5 9 100 µF 7 6 10 s Application Circuit Example ICs for Audio Common Use 5 V ± 0.5 V STB VTH = 3.5 V 56 kΩ VIN1 10 kΩ 0.1 µF 14 AN7194Z AN7077Z VIN2 7 10 14 10 kΩ 11 Off 100 s On 0.3 V 5.5 V 35 s 5 V ± 0.5 V Mute VTH = 2.8 V 4.7 kΩ 10 µF 13 1 0.22 µF 0.22 µF 2.2 Ω 0.33 µF 2.2 Ω 1 000 µF 2.2 Ω 20 kΩ 0.1 µF 4.7 kΩ 2.2 µF 100 kΩ 15 15 3 4 9 1 VCCH 24 V VCCL 12 V 1 000 µF AN7077Z AC 5