AN7125

ICs for Audio Common Use AN7125 Dual Channel BTL Power Amplifier s Overview AN7125 is a monolithic integrated circuit designed for 13.5 W (12 V,4 Ω) output audio power amplifier.It is a dual channel BTL IC suitable for stereo operation in radio cassette and TV application. 29.75±0.30 28.0±0.3 20.0±0.3 7.7±0.3 Unit : mm 12 (10.0) φ3.6 (1.27) (1.3) • Built-in muting pin • Built-in stand by pin • Built-in thermal shutdown protection circuit • Built-in current limiting circuit • High power : (13.5 W/12 V/4 Ω) (13.0 W/15 V/8 Ω) • Few external components • Operating voltage range 6 V ∼ 18 V (12 V typ.) R1.8 0.6 +0.10 0.25 –0.05 2.54 1 0.6 –0.05 (1.27) (10.0) s Features +0.15 (12.5) 1.45±0.15 1.2±0.1 (1.2) 19.1±0.3 21.9±0.3 HSIP012-P-0000A s Applications • Radio-cassette s Block Diagram REF TSD protection circuit Standby circuit Mute 10 11 GND GND GND VCC 12 1 2 3 4 5 6 7 8 9 1.80±0.15 3.5±0.3 29.6±0.3 1 AN7125 s Pin Descriptions Pin No. 1 2 3 4 5 6 VCC ch.1 + ve Phase Output ch.1 Output GND ch.1−ve Phase Output Standby ch.1 Input Description Pin No. 7 8 9 10 11 12 ICs for Audio Common Use Description Pre GND ch.2 Input Mute ch.2 −ve Phase Output ch.2 Output GND ch.2 +ve Phase Output s Absolute Maximum Ratings Parameter Supply voltage Supply current Power dissipation *2 *1 Symbol VCC ICC PD Topr Tstg Ratings 24 6.0 38.5 −25 to +75 −55 to +150 Unit V A W °C °C Operating ambient temperature Storage temperature Note) *1 : Without input signal,VCC is up to 24 V *2 : Ta = 75 °C. s Recommended Operating Range Parameter Supply voltage Symbol VCC Range 6.0 to 18.0 Unit V s Electrical Caracteristics at VCC = 12 V, RL = 4 Ω, freq. = 1 kHz, 2 channel outputs, Ta = 25 °C Parameter Quiescent circuit current Output noise voltage Voltage gain Total harmonic distortion Maximum output power Channel balance Channel crosstalk *2 *2 *1 Symbol ICQ VNO GVC THD PO CB CT VOFF RR ISTB MT VIN = 0 mV Conditions VIN = 0 mV,RG = 6.2 kΩ VIN = 20 mV VIN = 20 mV THD = 10 % VIN = 20 mV VIN = 20 mV,RG = 6.2 kΩ RG = 6.2 kΩ VR = 1 Vrms,fR = 120 Hz,RG = 6.2 kΩ VIN = 0 mV VIN = 20 mV Min   38  10 −1 55 −350 50  70 Typ 100 0.27 40 0.07 12 0 70 0 60 1 80 Max 210 0.5 42 0.4  1  350  10  Unit mA mVrms dB % W dB dB mV dB µA dB Output offset voltage Ripple rejection Standby current Muting effects *2 *1 Note) *1 : With a filter band 20 Hz to 20 kHz(12 dB/OCT)used. *2 : With a filter band 400 Hz to 30 kHz used. 2 ICs for Audio Common Use s Terminal Equivalent Circuit Pin No. 1 2 ドライバ回路 プリアンプ 3 ドライバ回路 4 600 Ω VCC/2 5 1 5 100 Ω 100 Ω 5 kΩ 5 kΩ 30 kΩ AN7125 Equivalent Circuit  VCC : VCC input 1 ch.1 O/P : Function Status typ. : 12 V VCC/2 ch.1 positive phase output pin. Pin2 4 ch.1 Power GND : ch.1 output power ground pin. 3 ch.1 O/P : ch.1 inverse phase output pin. Standby : This is the standby control pin. STB off > 3.5 V STB on = 0 V/GND 10 kΩ 2 kΩ 0V 30 kΩ VCC/2 VTH = 2.8 V 2 kΩ 8 6 200 Ω Pin6,8 30 kΩ 400 Ω ch.1 Input : This is the amplifier input pin. 0V 7 7  Pre GND : Input ground pin. 0V 3 AN7125 s Terminal Equivalent Circuit(continued) Pin No. 8 200 Ω Pin6,8 30 kΩ 400 Ω ICs for Audio Common Use Equivalent Circuit ch.2 Input : Function Status 0V This is the amplifier input pin. 7 9 Mute : Mute input pin. 3.2 kΩ 9 3.6 kΩ VTH = 1.5 V Mute on > 2.5 V Mute off = 0 V 7 20 kΩ 1 10 ドライバ回路 ch.2 Output : ch.2 inverse phase output pin VCC/2 プリアンプ 11 ドライバ回路 Pin10 12 ch.2 Power GND : ch.2 output power ground 0V 12 600 Ω VCC/2 30 kΩ 11 ch.2 Output : ch.2 positive phase output pin VCC/2 4 ICs for Audio Common Use s Application Circuit Example Input 7 GND VCC 2200 µF AN7125 VCC 12 V 1 2 IN1 6 OUT1 0.22 µF 2.2 Ω RL 4Ω Output1 3 GND 4 OUT1 51 kΩ 5V STB Cs 10 µF 5 0.22 µF 2.2 Ω 8.2 kΩ MUTE Cs 33 µF 9 10 11 12 OUT2 Output2 GND OUT2 0.22 µF 2.2 Ω 0.22 µF 2.2 Ω RL 4Ω IN2 8 STB 'Off' STB 'On' Mute 'Off' Mute 'On' 5V 0V 0V 5V s Application’ Precautions s 1. External heatsink is needed when used. External heatsink should be fixed to the chassis. 2. Fin of the IC can be connected to GND. 3. Please prevent output to VCC short and output to GND short. 4. The temperature protection circuit will operate at Tj around 150 °C. However, if temperature decrease, the protection circuit will automatically be decreased and resume normal operation. 5 AN7125 s Technical Information • HSIP012-P-0000A PD  Ta ICs for Audio Common Use 80 70 Power dissipation PD (W) 62.5 W 60 50 40 30 20.8 W 20 15.6 W 10 3.0 W 0 0 25 50 75 100 125 150 (4) (2) (3) (1) Ambient temperature Ta (°C) 1. TC = Ta,62.5 W (θj-c = 2 °C/W) 2. 20.83 W (θf = 4.0 °C/W) With a 100 cm2 X 3 mm Al heat sink (black colour coated) or a 200 cm2 X 2 m m Al heat sink (not lacquered) 3. 15.63 W (θf = 6.0 °C/W) With a 100 cm2 X 2 mm Al heat sink (not lacquered) 4. 3.0 W at Ta = 25 °C(θj-a = 42 °C/W) Without heat sink • Area of safe operation VCEmax = 30 V ICmax = 8 A 10 t = 0.2 ms t = 1.0 ms 2 t = 10 ms 1 5 IC (A) 0.5 0.2 0.1 1 2 5 10 20 50 100 VCE (V) 6