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| Ordering number : ENA0323 Monolithic Linear IC LA4919N Overview Two-Channel 10W BTL High-Efficiency TV Audio Output Power Amplifier 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 x 10W BTL power amplifier (VCC = 15V, RL = 8) * 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 = 25C Parameter Maximum supply voltage Allowable power dissipation Thermal resistance Maximum junction temperature Operating temperature Storage temperature Symbol VCC max Pd max j-c Tj max Topr Tstg No signal With a infinity large heat sink Conditions Ratings 24 15 3 150 -25 to +75 -40 to +150 Unit V W C/W C C C 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 = 25C Parameter Recommended supply voltage Recommended load resistance Symbol VCC RL Amplifier block Headphone block Operating supply voltage range VCC op The range where the package Pd is not exceeded Conditions Ratings 15 8 32 7.5 to 18 Unit V V Electrical Characteristics at Ta = 25C, VCC (Pin 19), Pre VCC (Pin 11) = 15V, RL = 8, f = 1kHz, Rg = 600, See the specified board and circuit. Parameter [Amplifier block] Quiescent current Standby current Voltage gain Output power Total harmonic distortion Output noise voltage Channel separation Ripple rejection Input resistance Output offset voltage Standby control voltage ICCO Ist VG PO THD VNO Chsep SVRR Ri Voffset VST Rg = 0 Amplifier on Amplifier off Pin 7 sink current (DDL on current)*2 [Headphone block] Voltage gain Output power Total harmonic distortion Channel separation Ripple rejection Input resistance Output noise voltage Standby control voltage VG PO THD Chsep SVRR Ri VNO VST Rg = 0, DIN AUDIO*1 2 0 VO = 0dBm THD = 10% VO = 0dBm, LPF = 30kHz Rg = 10k, VO = 0dBm, DIN AUDIO*1 60 75 14 Rg = 0, fR = 100Hz, VR = 0dBm, DIN AUDIO*1 5 50 6 60 0.025 70 85 20 0.01 26 0.04 18 1.0 0.05 7 dB mW % dB dB k mV V V I7Pin When +5V is applied to pin 7 through a 10k resistor, THD = 10% Rg = 0 Amplifier off, headphone off VO = 0dBm THD = 10% PO = 1W, LPF = 30kHz Rg = 0, DIN AUDIO*1 Rg = 10k, VO = 0dBm, DIN AUDIO*1 Rg = 0, fR = 100Hz, VR = 0dBm, DIN AUDIO*1 50 60 21 -120 2 0 100 150 28 8 35 65 0 30 10 0.04 0.05 60 70 30 39 +120 18 1.0 200 0.4 0.3 120 10 32 mA A dB W % mV dB dB k mV V V A Symbol Conditions min Ratings typ max Unit Headphone amplifier on Headphone amplifier off *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 18 Pd max -- Ta Aluminum heat sink mounting conditions With a infinity large heat sink 100x100x1.5mm3 Aluminum heat sink Tightening torque : 39Ncm Flat washer with silicone grease 28 15 Allowable power dissipation, Pd max - W 16 15 14 12.5 12 10 8 7 6 4 3.5 2.5 2 0 --40 12.7 11.2 8.4 R1.7 jc=3C/W 1 20.0 26.75 14 0.4 50x50x1.5mm3 Mounted on the specified circuit board Independent IC --20 0 20 40 60 80 100 120 140 160 (1.81) 1.78 0.6 1.0 4.0 4.0 Ambient temperature, Ta - C SANYO : DIP28H(500mil) No.A0323-3/6 LA4919N Block Diagram Headphone block HP IN1 1 Ripple filter HP IN2 2 VG=6dB VG=6dB Voltage regulator VCC 27 HP OUT2 28 HP OUT1 H/P Standby SW HP D.C 3 Output amplifier A HP Standby 4 Nonlinear amplifier AMP Standby 5 AMP Standby SW Output amplifier D.C 6 Ripple filter Switching regulator block DDL 7 H.L.S ABCD * H.L.S Higher Level signal Selector Switching drive 22 SWB 23 SW GND B 24 OUT2+ 25 OUT226 POWER GND ON TIME 8 Muting circuit used at power on 21 SWE IN2 9 Input amplifier 20 SW OUT PRE GND 10 Headphone stage Input amplifier stage Switching regulator stage Power TR stage 19 VCC PRE VCC 11 Output amplifier stage REF amplifier 18 IN VREF 12 Output amplifier C 17 IN1 13 Input amplifier Nonlinear amplifier D 16 OUT1+ POWER GND 14 Output amplifier 15 OUT1- No.A0323-4/6 LA4919N Test Circuit C1 1F/10V + R7 10 C17 0.047F 0.1F + C2 1F/10V C3 47F/25V + 3 4 5 6 7 HP D.C HP Standby AMP Standby D.C DDL ON TIME IN2 2 HP IN2 HP OUT2 27 26 R4 2.2 *C15 0.1F 25 24 23 22 21 20 19 18 C11 1000pF + 12 IN VREF 13 IN1 14 POWER GND OUT1+ OUT117 R1 2.2 *C9 0.1F 16 15 *C10 0.1F R2 2.2 * : When used shorted to VCC (pin 19), it is not necessary to add a capacitor at pin 11. * : Polyester film capacitor *C14 0.1F R3 2.2 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 200H - L1 : A671HN-221L + - TOKO, Inc. -C13 : OS capacitor R5 C13 - SANYO Electric Co., Ltd. 2.2F/25V 2.2k +B + C12 1000F/25V + C16 0.047F R6 10 C19 100F/10V C18 100F/10V Headphones 1 HP IN1 HP OUT1 28 + POWER GND OUT2OUT2+ SW GND SWB SWE SW OUT VCC C4 47F/25V + 10k *When measuring DDL OUT, apply 5V *DDL OUT and measure through C5 +8 a 10k resistor. 22F/6.3V + C6 2.2F/6.3V 9 10 PRE GND 11 PRE VCC +B C20 10F/25V + C7 22F/6.3V + C8 2.2F/6.3V External Components Amplifier Block C4 : C5 : Ripple filter capacitor. We recommend a value of 47F. Sets the amplifier turn-on delay time. We recommend a value of 22F. (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 10F. Input capacitors. We recommend a value of 22F. Note that if modified, 3.3F 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 (2.2) is used together with this capacitor. Pre-VCC power supply capacitor. This capacitor is not required when used connected to VCC. C6 and C8 : C7 : C9 and C10 : C14 and C15 C11 : C12 : C13 : C20 : 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 10, 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 200H coil. In particular, we recommend a coil in the inductance range 180 to 220H, a DC resistance of under 0.3, and a maximum allowable current of over 0.4A. Input capacitors. We recommend a value of 0.1F. Ripple filter capacitor. We recommend a value of 47F. 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 100F. D1 : L1 : Headphone Block C1 and C2 : C3 : C16 and C17 : C18 and C19 : 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 |
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