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| ICs for Audio Common Use AN7077Z Power supply and boost IC for class-H power amplifier s Overview A BTL 50 W x 2-channel (maximum. 75 W x 2channel) 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. 18.000.30 13.500.30 Unit : mm 4.000.20 1.500.10 3.600.10 * 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) 2.400.50 R0.55 (1.95) +0.15 0.25-0.05 s Features 19.000.30 19.300.30 HZIP015-P-0745A s Applications * Miniature audio component, CD player radio cassette, karaoke and other audio equipment 13.250.30 15.650.50 18.950.50 10.00.30 3.250.10 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 k Level shift 1 VBE 9 24 V clamp 11 15 A Mute Class-H mute 4 VRF = 6 V 13 0.3 V 6V 2 5 A 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 = 25C except operating ambient temperature and storage temperature. *2 : Without input signals (output current 0 mA). *3 : The value when Rth(j-c) = 1.1C/W, Ta = 75C. 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 = 25C 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 VIN = 16 V, RL = 4 VIN = 14 V, RL = 2 VIN = 3 Vrms (DC 15 V), RL = 4 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 A V V A dB A A A mA A 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. 145C, 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 and the output starts its operation when the V CC - output 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) = 1.1C/W Rth(j-a) = 68.3C/W Allowable power dissipation PD (W) 80 60 59.5 1C/W heat sink 40.3 2C/W heat sink 40 30.5 3C/W heat sink 20.5 5C/W heat sink 20 10C/W heat sink 11.3 1.8 Without heat sink 0 0 25 50 75 100 125 150 Ambient temperature Ta (C) 4 2.2 0.22 F 0.22 F 1 500 pF Off Mute On Active high 2.2 2 4 3 100 F 12 8 6 13 11 12 10 F 5 STB 8 5 9 100 F 7 6 10 s Application Circuit Example ICs for Audio Common Use 5 V 0.5 V STB VTH = 3.5 V 56 k 0.1 F 14 VIN1 AN7194Z 10 k AN7077Z VIN2 7 10 14 10 k 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 k 10 F 13 1 0.22 F 0.22 F 2.2 0.33 F 2.2 1 000 F 2.2 20 k 0.1 F 4.7 k 2.2 F 100 k 15 15 3 4 9 1 VCCH 24 V VCCL 12 V 1 000 F AN7077Z AC 5 |
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