AN7077Z

AN7077Z PANASONIC

Document overview

• Manufacturer or author: Provided By digicamel.com
• PDF pages: 5

Technical content

Power supply and boost IC for class-H power amplifier n Overview A BTL 50 W · 2-channel (maximum. 75 W · 2- channel) class-H power amplifier can be made up by com- bining 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. n Features

• 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 dam- age by a fire.
• Built-in mute function
• Built-in LED driver n Applications
• Miniature audio component, CD player radio cassette, karaoke and other audio equipment HZIP015-P-0745A Unit : mm 18.00–0.30 13.50–0.30 f3.60–0.10 10.0–0.30 11 5 4.00–0.20 1.50–0.10 0.50+0.20 -0.10 (0.61) (2.54) 0.25+0.15 -0.05 R0.55 3.25–0.10 13.25–0.30 18.95–0.50 15.65–0.50 1.27 (1.80) (1.95) 19.00–0.30 19.30–0.30 2.40–0.50

AN7077Z ICs for Audio Common Use n Block Diagram Pin No. Description

1 Power supply

2N . C .

3 Timer current setting

4 Current detection

5 Timer

6 Peak detection

7 GND

8 Input

det. Level shift

1 VBE

4 VBE

24 V clamp

det. V IN 7GND STB 10 V RF = 6 V V RF 15 mA5 mA0.3 V 6 V 10 kW Pin No. Description 9N F

10 Standby

11 Muting

12 LED

13 Ripple filter

14 ASO

15 Output

ICs for Audio Common Use AN7077Z n Electrical Characteristics at VCCH = 24.0 V, VCCL = 12 V, frep. = 1 kHz, Ta = 25°C n Absolute Maximum Ratings Parameter Symbol Rating Unit Supply voltage *2 V CC 34 V Supply current I CC 9.0 A Power dissipation *3 PD 68.2 W Operating ambient temperature *1 Topr -25 to +75 °C Storage temperature *1 T stg -55 to +150 °C n Recommended Operating Range Parameter Symbol Range Unit Supply voltage V CC 10.0 to 28.0 V Parameter Symbol Conditions Min Typ Max Unit Quiescent current I CQ V IN = open ¾ 25 50 mA Standby current I STB V IN = open ¾ 11 0 mA Output offset voltage 1 V OFF1 V IN = 8 V, RL = 4 W 2.0 2.5 3.0 V Output offset voltage 2 V OFF2 V IN = 16 V, RL = 4 W 2.5 3.0 3.5 V Output current I OUT V IN = 14 V, RL = 2 W 7.0 8.0 ¾ A Voltage gain G V V IN = 3 Vrms (DC 15 V), RL = 4 W- 1.0 0.0 1.0 dB Pin 4 output current I DET IOUT = 2 A 150 190 230 mA Pin 5 output current 1 I TI1 Pin 4 = high, pin 5 = 3 V 1 31 51 7 mA Pin 5 output current 2 I TI2 Pin 4 = low, pin 5 = 3 V 4.5 5 5.5 mA LED output current I LED V IN = 1 Vrms (DC 16 V), VLED = 8 V 15 30 ¾ mA Standby terminal current ICQ-STB V IN = open, VSTB = 5 V 500 650 800 mA Note) *1: T a = 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.

AN7077Z ICs for Audio Common Use n Usage Notes 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 V CC 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 VCC and the output starts its operation when the VCC - output voltage = approx. 18 V. 7. For the standby voltage, use a stabilized power supply of 3 V or more. n Technical Information

• PD ¾ TA curves of HZIP015-P-0745A PD ¾ TA 100 120 25 50 75 Ambient temperature Ta (°C) Allowable power dissipation PD (W) 100 125 150 Without heat sink 10°C /W heat sink 5°C /W heat sink 3°C /W heat sink 2°C /W heat sink 1°C /W heat sink Infinite heat sink R th(j-c) = 1.1°C/W R th(j-a) = 68.3°C/W113.6 59.5 40.3 30.5 20.5 11.3 1.8

ICs for Audio Common Use AN7077Z n Application Circuit Example 100 s 35 s 0.3 V 5.5 V Off On Off Mute On Active high 0.1 mF V CCH 24 V V CCL 12 V 1 000 mF 1 000 mF 2.2 mF AC 100 kW4.7 kW 2.2 W 2.2 W 0.1 mF 100 mF 0.33 mF 0.22 mF 2.2 W 0.22 mF 20 kW 4.7 kW 56 kW 10 kW 10 kW 2.2 W 0.22 mF 2.2 W 0.22 mF 10 mF 10 mF 5 V – 0.5 V V TH = 3.5 V 5 V – 0.5 V V TH = 2.8 V STB STB Mute V IN1 V IN2 100 mF 1 500 pF AN7077Z AN7194Z