Ordering number : ENA2051 LA4631VC Monolithic Linear IC 2-Channel SE AF Power Amplifier for Home Audio Use http://onsemi.com Overview The LA4631VC built-in a 2 channel single-ended output power amplifier that a power supply voltage range is wide and has additionally the standby function to reduce the current drain. It is a power amplifier IC suitable for driving speaker of various audio system equipments, which is especially useful for products that use batteries. Functions • Output power = 4.5W (typical) • Built in standby function (Pin5) • Built in thermal suht down circuit (VCC = 12V, RL = 3Ω, THD+N = 10%) Specifications Maximum Ratings at Ta = 25°C Parameter Symbol Conditions Ratings Unit Maximum supply voltage VCC max With no input signal 24 V Maximum output current IO peak Per channel 2.5 A Allowable power dissipation Pd max With an infinitely large heat sink 25 W Operating temperature Topr -20 to +75 °C Storage temperature Tstg -40 to +150 °C Stresses exceeding Maximum Ratings may damage the device. Maximum Ratings are stress ratings only. Functional operation above the Recommended Operating Conditions is not implied. Extended exposure to stresses above the Recommended Operating Conditions may affect device reliability. Operating Conditions at Ta = 25°C Parameter Symbol Recommended supply voltage VCC Recommended load resistance range RL op Allowable VCC op operating supply voltage Conditions Ratings Unit 12 V 3 to 8 Ω 5.5 to 22 V range *: VCC, RL, and output level such that Pd max, is not exceeded for the size of heat sink used. Semiconductor Components Industries, LLC, 2013 May, 2013 41812 SY 20120203-S00005 No.A2051-1/7 LA4631VC Electrical Characteristics at Ta = 25°C, VCC = 12V, RL = 3Ω, f = 1kHz, Rg = 600Ω Parameter Symbol Quiescent current ICCO Standby current Ist Voltage gain VG Conditions Rg = 0Ω Ratings Min. 18 VO = 0dBm 33 Typ. Max. Unit 35 80 mA 1 10 µA 35 37 dB 0.15 0.4 Total harmonic distortion THD PO = 1W Output power PO1 THD = 10% 3.0 4.5 W PO2 VCC = 9V, THD = 10% 2.0 2.5 W Output noise voltage VNO Rg = 0Ω, BPF = 20Hz to 20kHz Ripple rejection SVRR Rg = 0Ω, fR = 100Hz, VCCR = 0dBm 50 60 Channel separation CHsep Rg = 10kΩ, VO = 0dBm 55 65 Input resistance Ri 20 30 Standby pin applied voltage Vst 1.5 5.0 Amplifier on(Pin 5 voltage) 0.05 0.25 % mVrms dB dB 40 kΩ V Package Dimensions Unit : mm (typ) 3049C 26.8 (20.0) HEAT SPREADER 4.0 13.2 MAX 6.0 1.0 MIN 7.0 (11.8) (8.4) (R1.7) 12 1 0.5 (2.4) 2.0 0.4 1.0 2.0 SANYO : SIP12H Pd max -- Ta Allowable power dissipation, Pd max -- W 30 With an infinitely large heat sink 25 20 15 12.5 100 ×100 ×1.5mm3 10 7 50× 50× 1.5mm3 5 Single IC 3.2 0 -20 0 20 40 60 80 100 120 140 160 Ambient temperature, Ta -- C No.A2051-2/7 LA4631VC Block Diagram Application Circuit Example LA4631VC Ripple Filter IN1 PRE GND IN2 Standby P.P VCC OUT2 NC PWR GND NC OUT1 1 2 3 4 5 6 7 8 9 10 11 12 + + + RL + RL + VSTB 5V + + Top view VCC No.A2051-3/7 LA4631VC External Components and Usage Notes C1, C2 : These are input coupling capacitors; we recommend a value of 1μF or lower. The LA4631VC input pin potential is about 1.4V, and the polarity must be considered due to the DC potential of the circuits connected to the LA4631VC front end. The amplifier's startup time (the time from the point power is first applied until the point an output is generated) will change proportionally with the values of these input capacitors. (When 1μF capacitors are used, the startup time will be about 0.2 seconds.) C3 : This capacitor is used as a ripple filter. We recommend a value of 100μF. Amplifier impulse noise when turned off (when the standby pin goes low) may be made worse if a value under 100μF is used. The pin 1 voltage is about 1/2VCC. A DC mute function can be applied if pin 1 is connected to ground through a 300 to 500Ω resistor. Note that the muting activation voltage will be too low if a resistor value of 750Ω or higher is used. C4 : This is an impulse noise prevention capacitor. The recommended value is 4.7μF. If a value of 2.2μF or lower is used for C4, impulse noise when the amplifier is turned off (when the standby pin goes low) may be made worse. Also, if a value of 10μF or higher is used, an "incomplete muting" phenomenon may occur when the amplifier is turned off (when the standby pin goes low). C5 : Power supply capacitor. This capacitor should be located as close as possible to the IC (to minimize increases in the power supply line impedance) to achieve stable amplifier operation. C6, C7 : Output capacitors. These capacitors influence the amplifiers low band frequency characteristics. (fc = 1/2πCout×RL) fc = low band cutoff frequency, Cout = C6, C7 (Reference) Pin 5 Equivalent Circuit Inside IC (Reference) Pin 5 IC internal equivalent circuit Rx Ix STBY R2 2k 5 R1 2k Standby applied voltage Vx + Ix=max 4.5mA • The amplifier can be turned on and off by controlling the level (high/low) of Pin 5. • Applying a signal equal or greater than 1.5V and 800μA to Pin 5 turns on the amplifier. (If 5V is applied directly to Pin 5 the inflow current od Pin 5 is approximately 4.5mA.) • If a voltage, Vx, exceeding 5V is to be applied, current limiting resistor (Rx) should be inserted to limit the inflow current to 4.5mA. (See following equation.) Rx = (Vx – 5V)/4.5mA • If Pin 5 is to be controlled by the microprocessor, the Pin 5 inflow current (Ix) should be optimized for the capacity of the microprocessor by calculating Rx using the following equation, as a general guideline, and then confirming the inflow current through sctual measurement. Rx = (Vx/Ix) – R1 (2kΩ) Note: When apply voltage to standby (Pin 5), please add resistor (Rx). No.A2051-4/7 LA4631VC ICCO -- VCC 110 PO -- VCC 12 10 90 80 Output power, P O -- W Quiescent current, ICCO -- mA 100 70 60 50 40 30 20 8 6 4 2 10 0 0 0 2 4 8 6 10 12 14 16 18 22 20 24 4 6 8 THD -- PO 10 Total harmonic distortion, THD -- % Total harmonic distortion, THD -- % 2 f = 10kHz 1.0 7 5 f = 100Hz 3 f = 1kHz 2 3 5 7 1.0 2 3 5 7 2 1.0 7 5 3 2 10 2 3 5 7 100 2 3 Consumption current, I CC -- mArms 4 3 2 1 3 5 7 1.0 2 3 5 7 800 600 400 200 2 3 Consumption current, I CC -- mArms 1 1.0 2 Output power, P O -- W 7 1.0 2 3 5 7 10 5 7 10 ICC - PO (VCC=9V) 2 7 5 1200 3 5 5 7 100k Output power, P O -- W VCC = 9V f = 1kHz 3 2 3 1000 0 0.1 10 Pd - PO (VCC=9V) 2 5 7 10k VCC = 12V f = 1kHz Output power, P O -- W 4 2 3 ICC - PO (VCC=12V) 1200 5 2 5 7 1k Frequency, f -- Hz VCC = 12V f = 1kHz Power dissipation, Pd -- W 22 20 3 0.1 10 Pd - PO (VCC=12V) 6 Power dissipation, Pd -- W 18 5 Output power, P O -- W 0 0.1 16 7 3 0 0.1 14 THD -- f 5 0.1 0.1 12 10 7 2 10 Supply voltage, VCC -- V Supply voltage, VCC -- V 3 5 7 10 VCC = 9V f = 1kHz 1000 800 600 400 200 0 0.1 2 3 5 7 1.0 2 3 Output power, P O -- W No.A2051-5/7 LA4631VC PO -- f Gain -- f 6 35 5 Output power, P O -- W 37 Gain -- dB 33 31 29 4 THD = 1% 3 2 1 27 25 10 THD = 10% 2 3 5 7 100 2 3 5 7 1k 2 3 5 7 10k 2 3 0 10 5 7 100k 2 3 5 7 100 2 3 Frequency, f -- Hz CHsep -- f 80 5 7 10k 2 3 5 7 100k 5 7 10k 2 3 5 7 100k 5 7 10k 2 3 5 7 100k VNO -- Rg ch1 ch2 Output noise voltage, VNO -- mVrms Channel separation, CHsep -- dB 2 3 0.5 70 60 ch2 ch1 50 40 30 20 10 0 10 5 7 1k Frequency, f -- Hz 2 3 5 7 100 2 3 5 7 1k 2 3 5 7 10k 2 3 0.4 0.3 0.2 0.1 0 10 5 7 100k 2 3 5 7 100 2 3 5 7 1k 2 3 Frequency, f -- Hz SVRR -- VCC 70 60 50 40 30 20 10 6 8 10 12 14 16 18 20 70 60 50 40 30 20 10 0 10 0 4 SVRR -- fR 80 Supply voltage rejection ratio, SVRR -- dB Supply voltage rejection ratio, SVRR -- dB 80 22 2 3 5 7 100 2 3 5 7 1k Supply voltage, VCC -- V SVRR -- VCCR I CCO -- Vstby 80 VCC = 12V RL = 3Ω Rg = 0Ω 70 70 Quiescent current, ICCO -- mA Supply voltage rejection ratio, SVRR -- dB 80 60 50 40 30 20 10 0 0.5 VCC = 12V RL = 3Ω Rg = 0Ω fR = 100Hz BPF = 20Hz to 20kHz SVRR = 20log(VO/VCCR) 0.8 1.1 2 3 fR -- Hz 60 50 40 30 20 10 0 1.4 VCCR -- Vrms 1.7 2.0 0 0.2 0.4 0.6 0.8 1.0 1.2 1.4 1.6 1.8 2.0 Vstby -- V PS No.A2051-6/7 LA4631VC ON Semiconductor and the ON logo are registered trademarks of Semiconductor Components Industries, LLC (SCILLC). SCILLC owns the rights to a number of patents, trademarks, copyrights, trade secrets, and other intellectual property. A listing of SCILLC’s product/patent coverage may be accessed at www.onsemi.com/site/pdf/Patent-Marking.pdf. SCILLC reserves the right to make changes without further notice to any products herein. SCILLC makes no warranty, representation or guarantee regarding the suitability of its products for any particular purpose, nor does SCILLC assume any liability arising out of the application or use of any product or circuit, and specifically disclaims any and all liability, including without limitation special, consequential or incidental damages. “Typical” parameters which may be provided in SCILLC data sheets and/or specifications can and do vary in different applications and actual performance may vary over time. All operating parameters, including “Typicals” must be validated for each customer application by customer’s technical experts. SCILLC does not convey any license under its patent rights nor the rights of others. SCILLC products are not designed, intended, or authorized for use as components in systems intended for surgical implant into the body, or other applications intended to support or sustain life, or for any other application in which the failure of the SCILLC product could create a situation where personal injury or death may occur. Should Buyer purchase or use SCILLC products for any such unintended or unauthorized application, Buyer shall indemnify and hold SCILLC and its officers, employees, subsidiaries, affiliates, and distributors harmless against all claims, costs, damages, and expenses, and reasonable attorney fees arising out of, directly or indirectly, any claim of personal injury or death associated with such unintended or unauthorized use, even if such claim alleges that SCILLC was negligent regarding the design or manufacture of the part. SCILLC is an Equal Opportunity/Affirmative Action Employer. This literature is subject to all applicable copyright laws and is not for resale in any manner. PS No.A2051-7/7