Ordering number : EN4090D Monolithic Linear IC LA4450 For Bus and Track in Car Stereo 2-Channel Power Amplifier Overview The LA4450 is a single package 2-channel power Amplifier that supports an operating voltage of 26V. It is particularly well suited for use as the bus and track power IC in car stereo applications. Additionally, since the LA4450 can drive 4Ω loads, it can be used effectively in high-power high-end products. Furthermore, since it supports a high operating voltage and has low distortion, it is also optimal for use in TV and home audio products. Features Functions • Two channels in a single package • PO = 12W×2 (VCC = 26.4V, RL = 8Ω, THD = 10%) • PO = 20W×2 (VCC = 26.4V, RL = 4Ω, THD = 10%) • Can drive 4Ω speakers • Built-in standby switch • Minimizes impulse noises • Standby switch (active on high (+5V) input) • On-chip impulse noise protection circuit • On-chip thermal protection circuit • On-chip overvoltage and surge protection circuits Specifications Maximum Ratings at Ta = 25°C Parameter Symbol Maximum supply voltage VCC max Maximum output current IO peak Allowable power dissipation Pd max Operating temperature Storage temperature Conditions Ratings Rg = 0 (no signal) Unit 37 V 4 A 25 W Topr −35 to +80 °C Tstg −40 to +150 °C Infinite heat sink* Note : * Set VCC and RL within ranges that do not cause Pd max to exceed 25W. (When VCC is 37V, RL should be 6Ω or larger and when VCC is 35V, RL should be 4Ω or larger.) Any and all SANYO Semiconductor Co.,Ltd. products described or contained herein are, with regard to "standard application", intended for the use as general electronics equipment (home appliances, AV equipment, communication device, office equipment, industrial equipment etc.). The products mentioned herein shall not be intended for use for any "special application" (medical equipment whose purpose is to sustain life, aerospace instrument, nuclear control device, burning appliances, transportation machine, traffic signal system, safety equipment etc.) that shall require extremely high level of reliability and can directly threaten human lives in case of failure or malfunction of the product or may cause harm to human bodies, nor shall they grant any guarantee thereof. If you should intend to use our products for applications outside the standard applications of our customer who is considering such use and/or outside the scope of our intended standard applications, please consult with us prior to the intended use. If there is no consultation or inquiry before the intended use, our customer shall be solely responsible for the use. Specifications of any and all SANYO Semiconductor Co.,Ltd. products described or contained herein stipulate the performance, characteristics, and functions of the described products in the independent state, and are not guarantees of the performance, characteristics, and functions of the described products as mounted in the customer' s products or equipment. To verify symptoms and states that cannot be evaluated in an independent device, the customer should always evaluate and test devices mounted in the customer' s products or equipment. 91708 MS JK/43098HA (OT)/10794TS B8-0618/1102 No.4090-1/7 LA4450 Operating Conditions at Ta = 25°C Parameter Symbol Recommended supply voltage VCC Recommended load resistance RL Operating supply voltage range VCC op Conditions Ratings Unit 26.4 V 8 Ω 10 to 30 V Electrical Characteristics at Ta = 25°C, VCC = 26.4V, RL = 8Ω, f = 1kHz, Rg = 600Ω Parameter Symbol Ratings Conditions min typ Unit max 1 30 µA 80 140 mA Standby current Ist Standby switch off Quiescent current ICCO Rg = 0 50 Output power PO1 THD = 10% 10 PO2 THD = 10%, RL = 4Ω Voltage gain VG VO = 0dBm Total harmonic distortion THD PO = 1W Output noise voltage VNO Rg = 0, BPF-BW = 20Hz to 20kHz Ripple exclusion ratio SVRR Rg = 0, fR = 100Hz, VR = 0dBm 45 55 dB Channel separation CHsep VO = 0dBm, Rg = 10kΩ 45 55 dB Standby control voltage Vst With a 10kΩ resistor connected at pin 12 2.5 49 12 W 20 W 51 53 0.07 0.4 % 0.4 1.0 mV VCC dB V Package Dimensions unit : mm (typ) 3023B No.4090-2/7 LA4450 Test Circuit VCC=26.4V + 100µF + 10 DC 7 VCC BS1 6 IN1 9 8 + 47µF + IN1 NF1 1000µF − CH1 + 100µF OUT1 + 5 0.15µF LA4450 13 14 IN2 NF2 + + − CH2 RL=8Ω CH2 PWR 3 GND BS2 1 IN2 * 2.2Ω CH1 PWR 4 GND PRE 11 GND 1000µF OUT2 2 + 100µF 47µF + 1000µF 0.15µF * RL=8Ω 2.2Ω ST 12 OFF ON 10kΩ + *Polyester Film Capacitor 5V 1. Features and Usage Notes • Pin 12 is the standby pin. The IC operates when a voltage of 2V or higher is applied through the external resistor R1. Note that the maximum influx current to pin 12 is 500µA. • Changing the voltage gain The voltage gain VG can be lowered by connecting an external resistor in series between the NF pin (pins 8 and 14) IN + and CNF. OUT 75Ω − NF VG = 20log RNf’ + CNF 30kΩ 75+RNf ’ 30KΩ However, since the IC may oscillate if VG is 30dB or lower, use a VG of 36dB or higher. • The LA4450 includes a thermal protection circuit to prevent damage to or destruction of the IC due to abnormal overheating. As a result, the output may be attenuated or cut off if the application heat sinking is inadequate. • The LA4450 includes an overvoltage protection circuit to protect the IC against power supply surges and abnormal voltages. This circuit has hysteresis characteristics : it operates at between 39 and 40V, and recovers at around 34V. • Although the LA4450 includes a current limiter circuit to prevent damage due to abnormal currents, care must still be exercised to prevent load shorts and other excessive current conditions. No.4090-3/7 LA4450 Application Circuit Example + 100µF/35V C1 C10 DC 10 7 + 1000µF/35V VCC Ripple filter, impulse noise prevention circuit Current limiter circuit IN1 IN1 8 75Ω + 100µF 6.3V + 5 OUT1 − Bias circuit 1000µF/35V C8 C7 R3 0.15µF 2.2Ω RL=8Ω 4 30kΩ Pre-ground 11 BS1 47µF/35V + C9 CH1 NF1 C2 6 + 9 26.4V Overvoltage protection circuit Power ground Thermal shutdown protection circuit Power ground 3 Current limiter circuit IN2 + 13 IN2 NF2 14 C3 OUT2 CH2 − 75Ω + 100µF 6.3V 30kΩ 1000µF/35V + C5 0.15µF C6 C4 1 + 47µF R2 2.2Ω BS2 35V 2 RL=8Ω Standby switch 12 ST 10kΩ R1 OFF ON + 5V C6, C7: 0.15µF ......mylar capacitors No.4090-4/7 LA4450 Printed Circuit Board Pattern Example VCC 1 R1 C4 + + C6 C9 + + C2 C7 + C10 IN1 + C8 + C5 R2 + C3 C1 GND IN2 ST R3 OUT 2 OUT 1 GND Copper foiled side 90×100mm2 3 Output power, PO -- W 2 PO -- VCC 5 f = 1kHz VG = 51dB Rg = 600Ω THD = 10% RL = 8Ω 3 2 Output power, PO -- W 5 10 7 5 3 2 PO -- VCC f = 1kHz VG = 51dB Rg = 600Ω THD = 10% RL = 4Ω 10 7 5 3 2 1.0 1.0 7 5 10 14 18 22 26 30 34 7 5 10 38 14 18 10 7 5 THD -- PO 2 VCC = 26.4V RL = 8Ω VG = 51dB Rg = 600Ω Total harmonic distortion, THD -- % Total harmonic distortion, THD -- % 2 3 2 1.0 7 5 3 2 f = 10kHz 0.1 7 5 100Hz 1kHz 3 2 7 22 26 30 34 38 Supply voltage, VCC -- V Supply voltage, VCC -- V 10 7 5 THD -- PO VCC = 26.4V RL = 4Ω VG = 51dB Rg = 600Ω 3 2 1.0 7 5 f = 10kHz 3 2 100Hz 0.1 7 5 1kHz 3 0.1 2 3 5 7 1.0 2 3 Output power, PO -- W 5 7 10 2 3 2 7 0.1 2 3 5 7 1.0 2 3 5 7 10 2 3 Output power, PO -- W No.4090-5/7 LA4450 f Response 0 VG = 51dB converted to 0dB. VCC = 26.4V RL = 8Ω Rg = 600Ω -2 Response -- dB -4 -6 -8 -10 -12 -14 -16 -18 2 3 5 7 100 2 3 5 7 1k 2 3 5 7 10k 2 3 SVRR -- fR 0 Ripple exclusion ratio, SVRR -- dB 2 -20 -30 -40 -50 CH1 -60 CH2 -70 -80 5 7 100k VCC = 26.4V Rg = 0 RL = 8Ω VG = 51dB VCCR = 0dBm -10 7 100 2 3 5 SVRR -- VCCR -10 -20 -40 -50 -60 0 0.2 0.4 0.6 0.8 1.0 1.2 1.4 3 5 80 60 40 20 0 4 8 12 20 24 28 32 40 44 VCC = 26.4V RL = 8Ω Rg = 10kΩ VO = 0dBm -40 Rg = 10kΩ 0.6 Rg = 0 0.4 36 SEP -- f -30 VG = 51dB RL = 8Ω BPF = 20Hz to 20kHz 0.8 16 Supply voltage, VCC -- V Separation, sep -- dB Output noise voltage, VNO -- mV 2 100 -20 1.6 VNO -- VCC 1.0 0.2 -50 CH2 CH1 CH1 CH2 -60 -70 0 6 10 14 18 22 26 30 34 38 -80 2 3 42 5 7 100 2 3 Supply voltage, VCC -- V 3 VCC = 26.4V RL = 8Ω BPF = 20Hz to 20kHz/--3dB VG = 51dB 2 3 5 7 10k 2 3 5 7100k Pd -- PO f = 1kHz RL = 8Ω (dual) 2 Power dissipation, Pd -- W 1.0 5 7 1k Frequency, f -- Hz VNO -- Rg 1.2 Output noise voltage, VNO -- mV 7 10k RL = 8Ω Rg = 0 Ripple voltage, VCCR -- Vrms 0.8 0.6 0.4 0.2 0 5 0 -70 -0.2 3 120 -30 -80 2 ICCO -- VCC 140 VCC = 26.4V RL = 8Ω Rg = 0 VG = 51dB fR = 100Hz Quiescent current, ICCO -- mA Ripple exclusion ratio, SVRR -- dB 0 7 1k Ripple frequency, fR -- Hz Frequency, f -- Hz 35V 30V 26.4V 10 7 5 3 5 7 1k 2 3 5 7 10k 2 3 5 Signal Source Resistance, Rg -- Ω 7 100k 2 2 7 0.1 2 3 5 7 1.0 2 3 5 7 10 2 3 Output power, PO -- W No.4090-6/7 LA4450 Pd -- PO 5 3 30V Output power, PO -- W Power dissipation, Pd -- W 3 2 .4V 26 10 7 5 3 2 3 5 7 1.0 2 3 5 7 10 2 3 RL = 4Ω 2 8Ω 10 7 5 3 2 2 7 0.1 PO -- Ta 5 f = 1kHz RL = 4Ω (dual) VCC = 26.4V f = 1kHz THD = 10% Rg = 600Ω 1.0 -40 -20 0 20 40 60 80 100 Ambient temperature, Ta -- °C Output power, PO -- W VN -- Ta 20 Rg = 0 35V Output pin voltage, VN -- V 18 16 26.4V 14 12 10 8 11V 6 4 2 0 -40 -20 0 20 40 60 80 100 Ambient temperature, Ta -- °C SANYO Semiconductor Co.,Ltd. assumes no responsibility for equipment failures that result from using products at values that exceed, even momentarily, rated values (such as maximum ratings, operating condition ranges, or other parameters) listed in products specifications of any and all SANYO Semiconductor Co.,Ltd. products described or contained herein. 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SANYO Semiconductor Co.,Ltd. shall not be liable for any claim or suits with regard to a third party's intellctual property rights which has resulted from the use of the technical information and products mentioned above. This catalog provides information as of September, 2008. Specifications and information herein are subject to change without notice. PS No.4090-7/7