ICs for Audio Common Use 4.0 W 2 (8 V, 8 Ω) Power Amplifier with Mute Function and Volume Control Overview The is a monolithic integrated circuit designed for 4.0 W (8 V, 8 Ω) output audio power amplifier. It is a dual channel SEPP IC suitable for stereo operation in TV application. Features Built-in DC volume control Built-in mute circuit Built-in thermal protection circuit Built-in over current protection circuit Higher ripple rejection as compared to AN5273 V CC operating range : 4.2 V to 27. Applications TV Block Diagram Pin Descriptions Pin No. Mute In 2 Mute control 2 Ch. input 3 Volume control 3 4 Ripple rejection 5 Ch.2 input 6 Ripple filter Volume Vol. RR 4 In2 5 Ripple filter RF 6 Out2 7 NF2 8 29.75±0.30 28.0±0.3 20.0±0.3 Over current thermal protection circuit GND 9 (0.0) (0.0) 0.6 V CC 0 φ3.6 R.8 HSIP02-P-0000A NF 7.7±0.3 (2.5) (.2) 9.±0.3 2.9±0.3 Description Pin No..2±0. 7 Ch.2 output Out 2 Description 8 Negative feedback ch.2 9 GND 0 V CC Negative feedback ch. 2 Ch. output 2 +0.5 0.6 0.05 (.27) (.27) (.3) 2.54 +0.0 0.05 0.25 Unit : mm includes following four Product lifecycle stage..45±0.5.80±0.5 3.5±0.3 29.6±0.3
ICs for Audio Common Use Absolute Maximum Ratings Electrical Characteristics at V CC = 8 V, f = khz,, T a = 25 C Design reference data Note) The characteristic values below are theoretical values for designing and not guaranteed. Parameter Symbol Conditions Min Typ Max Unit Channel cross-talk CT V OUT = V[rms], Volume = max. 47 57 db Max. power dissipation P Dmax Use 0 C/W heat sink 5 7 W Max. power dissipation P Dmax2 V CC = 5.6 V, R L = 6 Ω.9 W No heat sink Input dynamic range *2 DR IN THD = %, P O = W 6. 7.2 V[p-p] Note) *2 : In order to measure input dynamic range correctly, it is necessary to reduce the gain by decreasing the DC volume to V to 2 V. Parameter Symbol Rating Unit Supply voltage V CC 29 V Supply current I CC 3.5 A Power dissipation *2 P D 37.5 W Operating ambient temperature * T opr 25 to +75 C Storage temperature * Recommended Operating Range T stg 55 to +50 C Note) * : T a = 25 C except power dissipation, operating ambient temperature and storage temperature. *2 : Power dissipation of the package at T a = 75 C. Parameter Symbol Range Unit Supply voltage V CC 4.2 to 27. Parameter Symbol Conditions Min Typ Max Unit Quiescent current I CQ No input signal 7 25 33 ma Voltage gain G V V IN = 90 mv 28 30 32 db Total harmonic distortion * THD V IN = 90 mv 0.3.0 % Maximum power output * P Omax THD = 0 % 3.6 4. W Channel balance CB V IN = 90 mv 0 db Max. volume attenuation * Att V IN = 90 mv 70 64 db Mute attenuation * M Att V IN = 90 mv 70 64 db Output noise voltage * V NO R g = 0 kω, Din-Audio Filter 0.6.0 mv[rms] Ripple rejection * RR V R = 280 mv[rms], f R = 00 Hz 30 35 db R g = 0 kω Note) * : With a filter band from 20 Hz to 20 khz used. includes following four Product lifecycle stage. 2
ICs for Audio Common Use Application Circuit Example 22 kω Audio mute Mute In 2 33 µf Usage Notes Vol. 3 µf RR 4 3.3 µf 0 kω In2 5 µf RF 6 00 µf 000 µf Out2 7 NF2 8 20 kω 0.047 µf GND 9 0 µf 20 Ω kω V CC 0 8 V 000 µf NF 0 µf kω ) Depending on the maximum application output power, external heatsink may be needed. External heatsink should be fixed to the chassis. Out 2 20 kω 0.047 µf 20 Ω 000 µf 2) Fin of the IC can be connected to GND. 3) Please prevent output to V CC short and output to GND short. 4) The temperature protection circuit will operate at T j around 50 C. However, if the temperature decreases, the protection circuit would automatically be deactivated and resume normal operation. Technical Information HSIP02-P-0000A Package power dissipation P D T a Power dissipation P D (W) 70.0 Infinite heat sink 62.5 60.0 50.0 4.7 C/W heat sink 40.0 3.3 2 C/W heat sink 30.0 3 C/W heat sink 25.0 20.0 7.9 5 C/W heat sink R th (j c) = 2 C/W Rth (j a) = 42 C/W includes following four Product lifecycle stage. 0.4 0.0 0 C/W heat sink Without heat sink 3.0 0.0 0 25 50 75 00 25 50 Ambient temperature T a ( C) 3
ICs for Audio Common Use Technical Information (continued) Application Note ) Voltage gain The voltage gain of the can be varied by changing the resistor R2 as shown below : G VI G V input= 4 db which is fixed in internal circuit. Mute 0 V OFF ON Pin8 R 22 kω R2 R Pin7,2 C NF = 0 µf Z MUTE C 33 µf R is always fixed at 20 kω. R2 is variable. G VO = 20 log (R /R 2 ) Typical values are : R = 20 kω, R 2 = kω G VO = 20 log (20 k/ k) = 26 db G VTOTAL = G VI + G VO = 4 db + 26 db = 30 db 2) DC volume control The DC volume control range is 0 V to. This range is used in order to be easily controlled by micro-computer using PWM output. The recommended circuit and volume attenuation characteristic are shown below : 300 Ω Volume control 3 R4 8 kω C4 2.2 µf R5 2 kω Microcomputer IC PWM output Fig. Volume control interface circuit for 3) Mute control Mute is ON when is applied to Pin. Then Q would turn ON and able to drive other part of the circuits. The external RC components provide a time constant for switching ON and OFF. 20 kω Q Volume attenuation 0 0.6 5 (V) Volume at Pin3 Fig. Volume characteristic of The purpose of the Mute is to attenuate the AC signal before it goes to the output. includes following four Product lifecycle stage. Threshold voltage at Pin : 0 V.8 V 2. V Mute OFF Mute ON 4
ICs for Audio Common Use Technical Information (continued) Application Note (continued) 4) Oscillation To prevent oscillation, it is advisable to use RC (Zobel network) at output. C of polyester film capacitor has smaller characteristic fluctuation with temperature and frequency. The resistor R connected in series with C is effective for phase correction at high frequency, and as a result, it improves the oscillation allowance. Pin7 2 C R 000 µf 0.047 µf 20 Ω 5) Power-ON/OFF pop-noise elimination The output pins 7, 2 and V O, during power turns ON and OFF are shown below : V CC V O Pin7 & Pin2 33 µf Turn ON time 47 µf C RF = 00 µf Turn OFF time The turn ON time in the is determined by the capacitance value of C RF. If value of the C RF is smaller, V O will turn on faster. The turn OFF time is dependent on the capacitance value of C VCC. Pop-noise would occur when V CC voltage declines faster than RF voltage. To solve this, increase the discharge time of V CC by increasing the capacitance values of C VCC. The recommended values of capacitance for C VCC and C RF are shown below : C RF C VCC Recommended Operating V CC Range Unit 33 µf 470 µf 4.5 to 27. RF 6 C RF V CC 0 C VCC includes following four Product lifecycle stage. 5
ICs for Audio Common Use Technical Information (continued) Application Note (continued) 6) Standby circuit Standby function can be implemented in the by external solution. It is realised by pulling the RF voltage to low and output voltage would follow RF as shown in the diagram. DC voltage ON Stand-by 0 V OFF 7) Ripple rejection improvement RF 6 /2V CC 00 µf The ripple rejection of the can be improved by another 5 db by connecting a capacitor to Pin4. RR 4 C RR Recommended capacitor C RR =.0 µf to 4.7 µf (Pin7 & Pin2) V O (DC) Stand-by Time includes following four Product lifecycle stage. 6
ICs for Audio Common Use Technical Information (continued) Characteristic Curve Chart Output power P O (W) Volume attenuation (db) Ripple rejection (db) 0 0. 0.0 0 0 20 30 40 50 60 V CC = 8 V RL = 8 Ω f = khz Vol. = max. THD P O, THD V IN 0 DC volume characteristics RR f P O 00 Input voltage V IN (mv) 00 0 0. 000 70 0 2 3 4 5 50 40 30 20 V CC = 8 V RL = 8 Ω VIN = 90 mv f = khz RR DC volume (V) Total harmonic distortion THD (%) Output power P O (W) Voltage gain G V (db) 0 8 6 4 2 f = khz THD = 0 % Vol. = max. P O V CC 0 0 2 4 6 8 20 22 24 26 28 30 28 26 24 22 V CC = 8 V RL = 8 Ω VIN = 90 mv Vol. = max. 0 00 Supply voltage V CC (V) G V, THD f k G V R L = 6 Ω V CC = 8 V V R = 280 mv Vol. = max. Frequency f (Hz) THD 0k.0 0.8 0.6 0.4 0.2 0 00k includes following four Product lifecycle stage. Total harmonic distortion THD (%) 0 00 k Frequency f (Hz) 0k 00k 7
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