Ordering number : ENA0323 Monolithic Linear IC LA4919N Two-Channel 10W BTL High-Efficiency TV Audio Output Power Amplifier Overview The LA4919N is a 2-channel 10W BTL high-efficiency power amplifier. By using a signal following switching system for the power supply to the amplifier output stage and by including a nonlinear amplifier in the signal system, the LA4919N holds the number of external components to a minimum and reduces the power consumption (thermal loss) in the operating range to one half that of earlier class B power amplifiers. The use of a DIP-28H package obviates the need for a separate heat sink and can contribute to internal space savings in end products. Features • High-efficiency 2-channel × 10W BTL power amplifier (VCC = 15V, RL = 8Ω) • Provided in a DIP-28H package (no heat sink is required) • The number of required signal-following switching circuits has been held to a single circuit, thus reducing even further the number of external components required. • The output is a fully analog signal, and no switching noise appears on the output lines. • Built-in standby switch (amplifier block/headphone block) • Built-in headphone amplifier : 2 inputs/2 outputs (VG = 6dB, PO = 60mW) • Built-in protection circuits (overvoltage and thermal protection circuits) Specifications Maximum Ratings at Ta = 25°C Parameter Maximum supply voltage Allowable power dissipation Thermal resistance Symbol VCC max Pd max θj-c Conditions Ratings Unit No signal 24 V With a infinity large heat sink 15 W 3 °C/W 150 °C Operating temperature Topr -25 to +75 °C Storage temperature Tstg -40 to +150 °C Maximum junction temperature Tj max Any and all SANYO Semiconductor products described or contained herein do not have specifications that can handle applications that require extremely high levels of reliability, such as life-support systems, aircraft's control systems, or other applications whose failure can be reasonably expected to result in serious physical and/or material damage. Consult with your SANYO Semiconductor representative nearest you before using any SANYO Semiconductor products described or contained herein in such applications. SANYO Semiconductor 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 products described or contained herein. N1506 MS PC B8-7776, B8-7179 No.A0323-1/6 LA4919N Operating Conditions at Ta = 25°C Parameter Symbol Recommended supply voltage VCC Recommended load resistance RL Conditions Ratings Unit 15 V 8 Ω 32 Ω 7.5 to 18 V Amplifier block Headphone block Operating supply voltage range VCC op The range where the package Pd is not exceeded Electrical Characteristics at Ta = 25°C, VCC (Pin 19), Pre VCC (Pin 11) = 15V, RL = 8Ω, f = 1kHz, Rg = 600Ω, See the specified board and circuit. Parameter Symbol Ratings Conditions min typ Unit max [Amplifier block] Quiescent current ICCO Rg = 0 35 65 120 mA Standby current Ist Amplifier off, headphone off 0 10 µA Voltage gain VG VO = 0dBm 28 30 32 dB Output power PO THD = 10% 8 10 W Total harmonic distortion THD PO = 1W, LPF = 30kHz 0.04 0.4 % Output noise voltage VNO Rg = 0, DIN AUDIO*1 0.05 0.3 mV Channel separation Chsep Ripple rejection SVRR Input resistance Ri Output offset voltage Voffset Standby control voltage VST Pin 7 sink current I7Pin Rg = 10kΩ, VO = 0dBm, DIN AUDIO*1 Rg = 0, fR = 100Hz, VR = 0dBm, DIN AUDIO*1 Rg = 0 Amplifier on Amplifier off (DDL on current)*2 50 60 60 70 21 30 dB 39 kΩ -120 +120 mV 2 18 0 When +5V is applied to pin 7 through a 10kΩ dB 100 V 1.0 V 150 200 µA 7 resistor, THD = 10% [Headphone block] Voltage gain VG VO = 0dBm 5 6 Output power PO THD = 10% 50 60 Total harmonic distortion THD VO = 0dBm, LPF = 30kHz 0.025 AUDIO*1 Channel separation Chsep Rg = 10kΩ, VO = 0dBm, DIN Ripple rejection SVRR Rg = 0, fR = 100Hz, VR = 0dBm, DIN AUDIO*1 Input resistance Ri dB mW 0.05 % 60 70 dB 75 85 dB 14 20 26 kΩ 0.01 0.04 mV AUDIO*1 Output noise voltage VNO Rg = 0, DIN Standby control voltage VST Headphone amplifier on 2 18 V Headphone amplifier off 0 1.0 V *1 : A DIN audio filter (20Hz to 20kHz) is used during testing. *2 : DDL : Dynamic Distortion Limiter No.A0323-2/6 LA4919N Package Dimensions unit : mm (typ) 3147C 15 12.7 11.2 R1.7 0.4 8.4 28 1 14 20.0 4.0 4.0 26.75 (1.81) 1.78 0.6 1.0 Allowable power dissipation, Pd max – W 18 Pd max -- Ta Aluminum heat sink mounting conditions 16 15 14 12.5 12 Aluminum heat sink Tightening torque : 39Ncm Flat washer with silicone grease With a infinity large heat sink 100×100×1.5mm3 θjc=3˚C/W 10 8 7 6 4 3.5 2.5 2 0 --40 50×50×1.5mm3 Mounted on the specified circuit board Independent IC --20 0 20 40 60 80 100 120 140 160 Ambient temperature, Ta – ˚C SANYO : DIP28H(500mil) No.A0323-3/6 LA4919N Block Diagram Headphone block HP IN1 VG=6dB 1 Ripple filter HP IN2 2 HP D.C 3 28 HP OUT1 Voltage regulator VCC 27 HP OUT2 VG=6dB H/P Standby SW 26 POWER GND Output amplifier A HP Standby 25 OUT2- 4 Nonlinear amplifier AMP Standby 5 B 24 OUT2+ AMP Standby SW Output amplifier D.C 6 23 SW GND Ripple filter Switching regulator block DDL ON TIME 8 IN2 9 Muting circuit used at power on 10 PRE VCC 11 22 SWB A B C D * H.L.S Higher Level signal Selector 21 SWE 20 SW OUT Input amplifier PRE GND Switching drive H.L.S 7 Output amplifier stage Headphone stage Input amplifier stage Switching regulator stage 19 VCC Power TR stage 18 REF amplifier IN VREF 12 17 Output amplifier C IN1 13 16 OUT1+ Input amplifier POWER GND Nonlinear amplifier D 15 OUT1- 14 Output amplifier No.A0323-4/6 LA4919N Test Circuit C1 1µF/10V + 1 HP IN1 HP OUT1 28 R7 10Ω C17 0.047µF + C18 100µF/10V Headphones 0.1µF + 2 HP IN2 C2 1µF/10V C3 47µF/25V C4 47µF/25V + + 3 POWER GND 27 OUT2- 25 5 AMP Standby OUT2+ 24 6 D.C SW GND 23 7 DDL SWB 22 ON TIME SWE 21 SW OUT 20 VCC 19 IN2 C6 2.2µF/6.3V 10 PRE GND +B C20 10µF/25V 11 + PRE VCC C19 100µF/10V R4 2.2Ω *C15 0.1µF HP Standby 9 + C16 0.047µF R6 10Ω 26 4 10kΩ *When measuring DDL OUT, apply 5V *DDL OUT and measure through C5 + 8 a 10kΩ resistor. 22µF/6.3V + HP D.C HP OUT2 *C14 0.1µF R3 2.2Ω Tr1 Switching transistor Components used during testing IC=2.5V - Tr1 : 2SD1667 (S rank) fT=30 to 50MHz - SANYO Electric Co., Ltd. D1 Flywhool Di - D1 : SB10-05A2 - SANYO Electric Co., Ltd. L1 200µH - L1 : A671HN-221L + - TOKO, Inc. -C13 : OS capacitor R5 C13 - SANYO Electric Co., Ltd. 2.2µF/25V 2.2kΩ +B + C12 1000µF/25V 18 C11 1000pF C7 22µF/6.3V + + 12 IN VREF 17 R1 2.2Ω *C9 0.1µF 13 IN1 OUT1+ 16 14 POWER GND OUT1- 15 C8 2.2µF/6.3V *C10 0.1µF R2 2.2Ω * : When used shorted to VCC (pin 19), it is not necessary to add a capacitor at pin 11. * : Polyester film capacitor External Components 〈Amplifier Block〉 C4 : C5 : C6 and C8 : C7 : C9 and C10 : C14 and C15 C11 : C12 : C13 : C20 : Ripple filter capacitor. We recommend a value of 47µF. Sets the amplifier turn-on delay time. We recommend a value of 22µF. (The turn-on delay time for this value will be about 0.7 seconds.) While the speed with which the amplifier turns on can be increased by reducing the value of this capacitor, this can result in impulse noise. We recommend using a value of over 10µF. Input capacitors. We recommend a value of 22µF. Note that if modified, 3.3µF or lower values should be used due to the relationship with impulse noise. Input reference amplifier capacitor. The same value as that for C6 and C8 must be used. Oscillation prevention capacitors. We recommend using polyester film capacitors with excellent thermal characteristics. These are used together with R1, R2, R3, and R4. Switching regulator oscillation prevention capacitor. We recommend a value of 1000pF. Power supply capacitor Switching regulator output smoothing capacitor. The LA4919N adopts a self-excited switching regulator technique. Since this capacitor influences the self excitation stability characteristics and the regulator efficiency, we recommend using a capacitor with a low equivalent series resistance and excellent thermal characteristics. For the same reason, resistor R5 (2.2Ω) is used together with this capacitor. Pre-VCC power supply capacitor. This capacitor is not required when used connected to VCC. No.A0323-5/6 LA4919N Tr1 : External switching transistor. We recommend using a device with IC = 2.5A and fT = 30 to 50MHz. Note that if a transistor with fT = 100MHz or higher is used, it may induce oscillation in the switching waveform. In this case, we recommend adding a base resistor of about 10Ω, and adjusting the circuit so that oscillation does not occur. Flywheel diode to take up the energy from the coil. We recommend using a Schottky barrier diode with a low VF. We recommend using a 200µH coil. In particular, we recommend a coil in the inductance range 180 to 220µH, a DC resistance of under 0.3Ω, and a maximum allowable current of over 0.4A. D1 : L1 : 〈Headphone Block〉 C1 and C2 : C3 : C16 and C17 : C18 and C19 : Input capacitors. We recommend a value of 0.1µF. Ripple filter capacitor. We recommend a value of 47µF. Oscillation prevention capacitors. We recommend using polyester film capacitors with excellent thermal characteristics. These are used together with R6 and R7. Output capacitors. We recommend a value of 100µF. Specifications of any and all SANYO Semiconductor 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. SANYO Semiconductor Co., Ltd. strives to supply high-quality high-reliability products. However, any and all semiconductor products fail with some probability. It is possible that these probabilistic failures could give rise to accidents or events that could endanger human lives, that could give rise to smoke or fire, or that could cause damage to other property. When designing equipment, adopt safety measures so that these kinds of accidents or events cannot occur. Such measures include but are not limited to protective circuits and error prevention circuits for safe design, redundant design, and structural design. In the event that any or all SANYO Semiconductor products (including technical data,services) described or contained herein are controlled under any of applicable local export control laws and regulations, such products must not be exported without obtaining the export license from the authorities concerned in accordance with the above law. No part of this publication may be reproduced or transmitted in any form or by any means, electronic or mechanical, including photocopying and recording, or any information storage or retrieval system, or otherwise, without the prior written permission of SANYO Semiconductor Co., Ltd. Any and all information described or contained herein are subject to change without notice due to product/technology improvement, etc. When designing equipment, refer to the "Delivery Specification" for the SANYO Semiconductor product that you intend to use. Information (including circuit diagrams and circuit parameters) herein is for example only; it is not guaranteed for volume production. SANYO Semiconductor believes information herein is accurate and reliable, but no guarantees are made or implied regarding its use or any infringements of intellectual property rights or other rights of third parties. This catalog provides information as of November, 2006. Specifications and information herein are subject to change without notice. PS No.A0323-6/6