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| Ordering number : ENN6631 Monolithic Linear IC LA4625 Two-Channel 13.5 W BTL Audio Power Amplifier Overview The LA4625 is a 2-channel general-purpose BTL audio power amplifier provided in a miniature package. It was designed for the best possible audio quality and features an extended low band roll-off frequency provided by a newly-developed NF circuit that does not require an external capacitor. Furthermore, crosstalk, which can cause muddiness in the audio output, has been significantly reduced by both circuit and wiring pattern improvements. Thus this amplifier can provide powerful lows and clear highs. Note that this device is pin compatible with the 20 W x 2channel LA4628, and allows end products differentiated by their power rating to share the same printed circuit board. Package Dimensions unit: mm 3113A-SIP14HZ [LA4625] 27.0 20.0 11.8 R1.7 14.5max 4.0 7.8 8.4 1 1.94 3.56 0.5 14 5.2 4.6 0.4 1.6 2.2 Features * Total output: 13.5 W + 13.5 W (at VCC = 12 V, RL = 4 , THD = 10%) * PMPO reference data: 115 W x 2 (VCC = 20 V, RL = 4 ) * High-fidelity design (fL < 10 Hz, fH = 130 kHz) * Extremely low impulse noise levels * An arbitrary amplifier startup time can be set up with external components. * Full complement of built-in protection circuits (includes circuits that protect against shorting to VCC, shorting to ground, load shorting, overvoltages and excessive temperatures) 1.78 3.56 SANYO: SIP14HZ Any and all SANYO 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 representative nearest you before using any SANYO products described or contained herein in such applications. SANYO 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 products described or contained herein. SANYO Electric Co.,Ltd. Semiconductor Company TOKYO OFFICE Tokyo Bldg., 1-10, 1 Chome, Ueno, Taito-ku, TOKYO, 110-8534 JAPAN 92900RM (OT) No. 6631-1/8 LA4625 Pd max -- Ta Allowable power dissipation, Pd max -- W 35 30 f=3C/W 25 20 15 10 5 0 -20 No Fin f=7C/W f=10C/W f=4C/W jc=2.0C/W 0 20 40 60 80 100 120 140 160 Ambient temperature, Ta --C Specifications Maximum Ratings at Ta = 25C Parameter Maximum supply voltage Maximum output current Allowable power dissipation Operating temperature Storage temperature Symbol VCC max IO peak Pd max Topr Tstg No signal Per channel With an arbitrarily large heat sink Conditions Ratings 24 3.5 32.5 -20 to +85 -40 to +150 Unit V A W C C Operating Conditions at Ta = 25C Parameter Recommended supply voltage Recommended load resistance range Allowable operating supply voltage range Symbol VCC RL op VCC op Conditions Ratings 12 4 to 8 7.2 to 20 Unit V V Note: With VCC, RL, and the output level in ranges such that the Pdmax for the heat sink used is not exceeded. Operating Characteristics at Ta = 25C, VCC = 12 V, RL = 4 , f = 1 kHz, Rg = 600 Parameter Quiescent current Standby mode current drain Voltage gain Total harmonic distortion Output power Output offset voltage Output noise voltage Ripple rejection ratio Channel separation Input resistance Standby pin applied voltage Symbol ICCO Ist VG THD PO1 VN offset VNO SVRR CH Sep Ri VST Amplifier on (applied through an external 10 k resistor) Rg = 0 Standby mode (amplifier off), with no power supply capacitor. VO = 0 dBm PO = 1 W, Filter = FLAT THD = 10% Rg = 0 Rg = 0, BPF = 20 Hz to 20 kHz Rg = 0, VR = 0 dBm, fR = 100 Hz Rg = 10 k, VO = 0 dBm 40 50 21 2.5 10 -300 0.1 50 60 30 39 VCC 38 Conditions Ratings min 65 typ 120 10 40 0.06 13.5 +300 0.5 max 240 60 42 0.2 Unit mA A dB % W mV mV dB dB k V No. 6631-2/8 LA4625 Equivalent Circuit Block Diagram C2 100 /16 V + + VCC C5 2200 25 V 2 RIPPLE FILTER C1 PREDRIVER POWER 14 OUTPUT PIN TO VCC SHORT PROTECTOR -OUT1 13 ** - RL 4 + 2.2 10 V 1 + - IN LOAD SHORT PROTECTOR PREDRIVER POWER POWER GND1 12 ** 11 OUTPUT PIN TO GND SHORT PROTECTOR VCC C6 0.1 R2 2.2 R3 2.2 C7 0.1 +OUT1 + PRE GND 3 BIAS CIRCUIT OVER VOLTAGE/ SURGE THERMAL SHUT DOWN R1 ON 10 K OFF 4 STANDBY SW Standby SW OUTPUT PIN TO GND SHORT PROTECTOR ** (POLYESTER FILM CAPACITOR) +5 V C4 PREDRIVER POWER -OUT2 - RL 4 + 2.2 10 V IN2 9 ** 6 + - IN LOAD SHORT PROTECTOR PREDRIVER POWER POWER GND2 10 8 OUTPUT PIN TO VCC SHORT PROTECTOR ** C8 0.1 R4 2.2 R5 2.2 C9 0.1 +OUT2 + POP NOISE PREVENTION CIRCUIT + 33 10 V 5 C3 0.47 10 V + 7 C10 C3 Sets the amplifier starting time (Approximately 0.6 seconds when 33 F) C10 Impulse noise reduction (Note: The device's ability to withstand shorting to VCC or shorting to ground when VCC is around 16 V may be reduced as the value of this capacitor is increased. We recommend 0.47 F.) No. 6631-3/8 LA4625 Pin Voltages VCC = 12 V, with 5 V applied to STBY through a 10 k resistor, RL = 4 , Rg = 0 Pin No. Pin Pin voltage 1 IN1 1.46 V 2 DC 5.18 V 3 PRE-GND 0V 4 STBY 3.21 V 5 ON TIME 2.26 V 6 IN2 1.46 V 7 POP 2.05 V Pin No. Pin Pin voltage 8 +OUT2 5.21 V 9 -OUT2 5.21 V 10 PWR-GND2 0V 11 +OUT1 5.21 V 12 PWR-GND1 0V 13 -OUT1 5.21 V 14 VCC 12 V External Components C1 and C4: Input capacitors. A value of 2.2 F is recommended. Determine the polarity based on the DC potential of the circuit connected directly to the LA4625 front end. Note that the low band response can be adjusted by varying fL with the capacitors C1 and C4. C2: Decoupling capacitor (ripple filter) C3: Sets the amplifier starting time, which will be approximately 0.6 seconds for a value of 33 F. The starting time is proportional to the value of this capacitor, and can be set to any desired value. C5: Power-supply capacitor C6, C7, C8, and C9: Oscillation prevention capacitors. Use polyester film capacitors (Mylar capacitors) with excellent characteristics. (Note that the series resistors R2, R3, R4, and R5 are used in conjunction with these capacitors to achieve stable amplifier operation.) A value of 0.1 F is recommended. C10: Impulse noise reduction capacitor. A value of 0.47 F is recommended. Caution is required when selecting the value for this capacitor, since increasing its value influences the operation of the circuits that protect against shorting the amplifier output pins to VCC or to ground when higher VCC voltages (approximately 16 V or higher) are used. R1: Standby switch current limiting resistor. A value of 10 k is recommended when a voltage in the range 2.5 to 12 V will be applied as the standby switching voltage. Note that this resistor is not optional: it must be included. IC Internal Characteristics and Notes 1. Standby function * Pin 4 is the standby switch. A voltage of 2.5 V or higher must be applied through an external resistor to turn the amplifier on. * If a voltage of over 12 V will be applied as the standby mode switching voltage, use the following formula to determine the value of R1 so that the current entering at pin 4 remains under 500 A. 500 A or lower 10 k 4 R1 Applied standby voltage About 1.4 V (2 VBE) No. 6631-4/8 LA4625 3. Impulse noise improvements * While the LA4625 achieves a low level of impulse noise, if even further reductions in impulse noise at power on/off (and when switching into or out of standby mode) a 0.47 F capacitor may be inserted between pin 7 and the PRE GND pin (pin 3). (Pin 7 is the output amplifier bias pin. Since the ability to withstand shorting the output pins to VCC or ground is reduced for supply voltages over 16 V if the pin 7 capacitance is large, we recommend a value of 0.47 F or lower for this capacitor.) 4. Protection circuits * Due to the system structure of the protection circuit for shorts to VCC or ground, if there is a DC resistance between the amplifier output pins and ground, the protection circuit may operate when power is first applied and the amplifier may fail to turn on. The basic design approach we recommend is not to adopt any designs in which there is a DC resistance between the amplifier outputs and ground. * The LA4625 includes a built-in thermal protection circuit to prevent the IC from being damaged or destroyed if abnormally high temperatures occur. This thermal protection circuit gradually reduces the output if the IC junction temperature (Tj) reaches the range 170 to 180C due to inadequate heat sinking or other problem. If the temperature falls, the amplifier will restart automatically. * The LA4625 also includes other protection circuits. Use of these circuits also requires care during end product design and testing. 5. Other notes * The LA4625 is a BTL power amplifier. When testing this device, the ground systems for the test equipment connected to IC inputs, and that for the test equipment connected to IC outputs, must be isolated. Do not use a common ground. Printed Circuit Pattern (copper foil side) GND C5 + VCC + + --OUT1 R2 GND C6 STB R1 +OUT1 R3 C7 C4 + C10 --OUT2 GND R4 C8 +OUT2 R5 C9 + + IN2 C3 C2 14 1 LA4625 C1 IN1 ILA00349 No. 6631-5/8 LA4625 PO -- VCC f = 1 kHz Rg = 600 RL = 4 60 50 100 7 5 3 2 PO -- VIN VCC = 12 V RL = 4 f = 1 kHz Output power, PO -- W 40 30 TH 20 D =3 0% Output power, PO -- W 16 17 18 10 7 5 3 2 1.0 7 5 3 2 0.1 7 5 3 2 0.01 1.0 2 3 5 7 10 2 3 5 7 100 2 3 5 7 1k ILA00355 10 % 10 0 6 7 8 9 10 11 12 13 14 15 Supply voltage, VCC -- V 24 ILA00354 2 Input voltage, VIN -- mVrms PO -- f VCC = 12 V RL = 4 Rg = 600 f Response 20 0 Output power, PO -- W THD = 10 % 12 Response -- dB 16 --2 THD = 3 % THD = 1 % --4 8 --6 4 --8 0 10 23 5 7 100 23 5 7 1k 23 5 7 10k 23 Frequency, f -- Hz 10 7 5 3 2 1.0 7 5 3 2 0.1 7 5 3 2 0.01 0.1 2 3 5 7 1.0 2 3 5 7 10 2 3 5 7100k ILA00356 --10 10 VCC = 12 V RL = 4 Rg = 600 VO = 0 dBm at f = 1 kHz 23 5 7 100 23 5 7 1k 23 5 710k 23 Frequency, f -- Hz 10 7 5 3 2 1.0 7 5 3 2 0.1 7 5 3 2 23 5 7 100 23 5 7 1k 23 5 7 10k 5 7100k ILA00357 THD -- PO Total harmonic distortion, THD -- % VCC = 12 V RL = 4 Rg = 600 THD -- f VCC = 12 V RL = 4 PO = 1 W Total harmonic distortion, THD -- % 10 kHz 100 kHz 1 kHz 0.01 Output power, PO -- W 0 10 20 30 40 50 60 70 80 90 10 5 7 100 ILA00358 10 23 Frequency, f -- Hz 1.0 5 7100k ILA00359 CH sep. -- f Output noise voltage, VNO -- mVrms VCC = 12 V RL = 4 Rg = 10 k VO = 0 dBm VNO -- Rg VCC = 12 V RL = 4 7 5 3 2 Channel separation, CHsep -- dB CH1 2 CH2 1 0.1 7 5 3 2 23 5 7 100 23 Frequency, f -- Hz 5 7 1k 23 5 7 10k 23 5 7100k ILA00360 0.01 100 2 3 Signal source resistance, Rg -- 5 7 1k 2 3 5 7 10k 2 3 5 7 100k ILA00361 No. 6631-6/8 LA4625 SVRR -- VCC Ripple rejection ratio, SVRR -- dB Rg = 0 fR = 100 Hz VCCR = 0 dBm 0 0 SVRR -- VCCR VCC = 12 V RL = 4 Ripple rejection ratio, SVRR -- dB --20 --20 --40 OUT1 OUT2 --40 100 Hz OUT2 100 Hz OUT1 --60 --60 --80 3 kHz OUT1 3 kHz OUT2 SVRR = 20 log VO VCCR --100 --80 --120 4 6 7 8 10 12 14 16 18 20 22 --100 0 0.2 0.4 0.6 0.8 1.0 1.2 1.4 1.6 1.8 2.0 Supply voltage, VCC -- V 0 ILA00362 180 160 Power supply ripple, VCCR -- Vrms ILA00363 SVRR -- fR Quiescent current, ICCO -- mA VCC = 12 V RL = 4 Rg = 0 VCCR = 0 dBm ICCO -- VCC RL = Open Rg = 0 Ripple rejection ratio, SVRR -- dB --20 140 120 100 80 60 40 20 0 --40 OUT1 --60 OUT2 --80 --100 10 23 5 7 100 23 5 7 1k 23 5 7 10k 23 Ripple frequency, fR -- Hz 12 57 100k ILA00364 100 7 5 0 4 8 12 16 20 24 28 32 36 Supply voltage, VCC -- V ILA00365 VN -- VCC RL = 4 Rg = 0 Pd, ICC -- PO 10 RL = 4 Rg = 600 f = 1 kHz 10 7 5 3 2 Power dissipation, Pd -- W 3 2 I CC 8 VN -- V 6 10 7 5 3 2 V CC =1 5V VCC = 12 V 1.0 7 5 3 2 4 2 0 0 5 10 15 20 25 30 35 Supply voltage, VCC -- V 1.0 1.0 0.1 2 3 5 7 1.0 2 3 5 7 10 2 3 ILA00366 Output power, PO -- W/ch 0.1 7 100 ILA00367 5 Amp ON time VCC = 12 V VST = 5 V 0.8 Amp ON time -- s 0.6 0.4 0.2 0 1.0 2 3 5 7 10 2 3 5 C3 -- F 7 100 ILA00368 No. 6631-7/8 LA4625 Specifications of any and all SANYO 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 Electric 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 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 Electric 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 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 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 September, 2000. Specifications and information herein are subject to change without notice. PS No. 6631-8/8 |
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