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| Ordering number : ENN6629 Monolithic Linear IC LA4743A 45 W Four-Channel (Bridge Circuit) Power Amplifier Overview The LA4743A is a 45 W 4-channel power amplifier IC for car stereo systems. It features a built-in bridge circuit and the ability to radically reduce the number of external components required. It is also pin compatible with the LA4743B, which differs in the amount of gain provided. Package Dimensions unit: mm 3236-HZIP25 [LA4743A] 29.2 25.6 4.5 Features * Maximum output power: 45 W x 4 channels (VCC = 14.4 V, 4 load, 1 kHz) * 40 W x 4 channels (VCC = 13.7 V, 4 load, 1 kHz) * Requires only seven external components and does not require an oscillation prevention RC circuit, a noise filter, or a BS capacitor. R1.7 14.4 17.4 3.3 10.2 0.4 4.0 4.0 2.60 2.0 (1.0) 2.0 0.53 Functions * Muting function * Built-in standby switch * Full complement of built-in protection circuits, including protection from shorting to VCC, shorting to ground, load shorting, overvoltages, and overheating. SANYO: HZIP25 Specifications Maximum Ratings at Ta = 25C Parameter Maximum supply voltage Maximum output current Allowable power dissipation Operating temperature Storage temperature Package thermal resistance Symbol VCC max1 VCC max2 IOpeak Pd max Topr Tstg jc With an arbitrarily large heat sink Signal present No signal (for 1 minute) Conditions Ratings 18 26 4.5/ch 50 -40 to +85 -40 to +150 1 Unit V V A W C C C/W 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 O3100RM (OT) No. 6629-1/9 LA4743A Operating Conditions at Ta = 25C Parameter Recommended supply voltage Recommended load resistance Operating supply voltage range Symbol VCC RL VCC op Conditions Ratings 14.4 4 9 to 18 Unit V V Operating Characteristics at Ta = 25C, VCC = 14.4 V, f = 1 kHz, RL = 4 , Rg = 600 Parameter Quiescent current Standby current Output offset voltage Voltage gain Voltage gain difference Symbol ICCO Ist VNoffset VG VG PO1 Output power PO max1 PO max2 Total harmonic distortion Channel separation Ripple rejection ratio Output noise voltage Muting attenuation THD CHsep SVRR VNO Mute(att) THD = 10 % VCC = 13.7 V, VIN = 5 Vrms VIN = 5 Vrms PO = 4 W VO = 0 dBm, Rg = 10 k fr = 100 Hz, VR = 0 dBm, Rg = 0 Rg = 0, B.P.F. = 20 Hz to 20 kHz VO = 20 dBm 70 55 50 RL = , Rg = 0 Vst = 0 V Rg = 0 VO = 0 dBm -100 25 -1 23 28 40 45 0.05 65 60 100 80 200 0.4 26 Conditions Ratings min 100 typ 200 max 350 10 +100 27 +1 Unit mA A mV dB dB W W W % dB dB Vrms dB No. 6629-2/9 LA4743A Sample Application Circuit and Block Diagram 2200 F VCC1/2 6 + + 0.022 F VCC3/4 20 IN 1 11 0.22 F TAB 1 + + 9 OUT 1+ - Protective Circuit - 7 OUT 1- PWR GND 1 8 - + + 5 OUT 2+ IN 2 12 0.22 F + - 3 OUT 2- PWR GND 2 2 ST BY 4 +5 V ST ON R.F 47 F + + Standby Switch Ripple Filter Mute Circuit Mute 22 3.3 F + 10 k 10 IN 3 15 0.22 F N.C 25 + + 17 OUT 3+ Low Level Mute ON - Protective Circuit - 19 OUT 3- PWR GND 3 PRE GND 13 18 - + + 21 OUT 4+ IN 4 14 0.22 F ON TIME C 22 F + + Muting & ON Time Control Circuit - 23 OUT 4- PWR GND 4 16 24 Top view A13496 No. 6629-3/9 LA4743A Pin Functions and Equivalent Circuits at VCC = 14.4 V, ST-BY = 5 V Pin No. 1 2 8 18 24 VCC 130 Function TAB DC voltage [V] Notes Internal equivalent circuit POWER GND 3 5 7 9 17 19 21 23 -OUT2 +OUT2 -OUT1 +OUT1 +OUT3 -OUT3 +OUT4 -OUT4 130 Low saturation voltage circuit 2.7 3 5 7 9 17 19 21 23 A13497 10 k 4 4 ST-BY * The amplifier will be on when the applied voltage is between 2 V and VCC. 30 k 1.5 k A13498 6 20 VCC1/2 VCC3/4 Bias circuit ST-BY power supply line Input amplifier ST-BY power supply line 10 SVR 13.2 * Low ripple power supply line for all internal IC blocks VCC 200 200 1 k 10 A13499 Continued on next page. No. 6629-4/9 LA4743A Continued from preceding page. Pin No. Function DC voltage [V] Notes Input amplifier ST-BY power supply line 5 pF Internal equivalent circuit 11 12 14 15 IN1 IN2 IN4 IN3 11 12 14 15 VREF 30 k 1 k 3.1 * Input amplifiers that require no capacitor in the input noise filter. 100 Inverter amplifier A13500 13 PRE GND Bias circuit power supply line 20 k VREF 2 k * Amplifier turn-on time control circuit 16 ON TIME MUTE 2.6 * Impulse noise prevention circuit * With a 22 F capacitor, the turn-on time will be 0.6 s. 16 200 10 k 2 k 40 k 13 k A13501 Input amplifier ST-BY power supply line 3 k 1 k 22 MUTE 4.1 * The muting function is activated when the applied voltage is under 1 V. VREF 100 22 7.5 k 10 k Amplifier bias circuit VREF 100 k A13502 25 N.C. No. 6629-5/9 LA4743A Notes on Usage and Handling * Oscillator stabilization time In some cases, details of the printed circuit board layout may lead to induced parasitic oscillation. This oscillation can be prevented by adding any one of the following components. Verify the optimal values for these capacitors by testing in actual end products. Technique 1 ... Connect Mylar capacitors (0.1 F) between the BTL amplifier outputs. Technique 2 ... Connect an RC circuit (2.2 and 0.1 F in series) between each output and ground. * Audio quality (low band) The low-band frequency characteristics can be improved by adjusting the values of the input capacitors. The recommended value is 2.2 F. * Impulse noise The LA4743A includes a built-in impulse noise suppression circuit. However, further improvement can be achieved by using the muting circuit. When first applying power, activate the muting function at the same time as applying power. Then, after the output DC potential has stabilized, turn off the muting function. When turning off the power, first activate the muting function and then turn off the power. Sample transient responses are attached (see the timing charts). Transient Responses at Power On Power on: Standby and muting activated at the same time. Muting is turned off after the output has stabilized. 5 [V] External 10 k muting switch MUTE 0 MUTE OFF Standby set high 5 [V] Standby pin 0 [V] 4 Output pin 2 Mute 10 k 22 0 3.3 F + ON TIME 200 ms/div Transient Responses at Power Off Power off: After activating the muting circuit, turn the power off. 5 [V] 0 External 10 k muting switch MUTE 5 [V] 0 [V] Standby set low 4 Standby pin 2 Output pin Mute 10 k 22 3.3 F + 0 200 ms/div No. 6629-6/9 LA4743A ICCO, VN -- VCC RL = Open Rg = 0 Vst = 5 V O I CC 300 5 Quiescent current, ICCO -- V Output power, PO -- W 4 Output pin voltage, VN -- V 250 100 7 5 3 2 10 7 5 3 2 1.0 7 5 3 2 0.1 7 5 3 2 PO -- VIN VCC = 14.4 V RL = 4 f = 1 kHz Rg = 600 VG = 26 dB All channels driven 200 3 150 VN 2 100 I CCO 50 1 VN 0 25 0 0 5 10 15 20 0.01 10 2 3 5 7 100 2 3 5 7 1k 2 3 5 7 10k Supply voltage, VCC -- V 48 44 40 Input level, VIN -- mVrms 100 7 5 3 2 10 7 5 3 2 1 7 5 3 2 0.1 7 5 3 2 2 3 57 1 PO -- VCC RL = 4 f = 1 kHz Rg = 600 THD = 10 % All channels driven THD -- PO VCC = 14.4 V RL = 4 f = 100 Hz Rg = 600 All channels driven 36 32 28 24 20 16 12 8 4 8 Total harmonic distortion, THD -- % Output power, PO -- W OUT2, 4 OUT1, 3 2 3 5 7 10 2 3 5 7 100 10 12 14 16 18 20 0.01 0.1 Supply voltage, VCC -- V 100 7 5 3 2 10 7 5 3 2 1 7 5 3 2 0.1 7 5 3 2 2 3 5 7 1 2 3 5 7 10 2 3 5 7 100 Output power, PO -- W 100 7 5 3 2 10 7 5 3 2 1 7 5 3 2 0.1 7 5 3 2 2 3 57 1 2 3 5 7 10 2 3 5 7 100 THD -- PO VCC = 14.4 V RL = 4 f = 1 kHz Rg = 600 All channels driven THD -- PO VCC = 14.4 V RL = 4 f = 10 kHz Rg = 600 All channels driven Total harmonic distortion, THD -- % 0.01 0.1 Output power, PO -- W Total harmonic distortion, THD -- % 0.01 0.1 Output power, PO -- W THD -- f Total harmonic distortion. THD -- % 10 7 5 3 2 1 7 5 3 2 0.1 7 5 3 2 10 f -- Response 4 2 VCC = 14.4 V RL = 4 Rg = 600 PO = 2 W All channels driven 0 2.2 F Response -- dB -2 -4 OU T1 OU ,3 23 T2, 4 0.2 2 F -6 -8 -10 10 0.01 VCC = 14.4 V RL = 4 Rg = 600 VO = 0 dBm at f = 1 kHz All channels driven 23 5 7 100 23 5 7 1k 23 5 7 10k 23 5 7100k 5 7 100 23 5 7 1k 23 5 7 10k 23 5 7100k Input frequency, f -- Hz Input frequency, f -- Hz No. 6629-7/9 LA4743A CH Sep -- f 0 CH Sep -- f Channel separation, CH Sep -- dB VCC = 14.4 V RL = 4 Rg = 10 k VO = 0 dBm 0 Channel separation, CH Sep -- dB -20 -20 VCC = 14.4 V RL = 4 Rg = 10 k VO = 0 dBm -40 -40 13 -60 12 24 -60 21 14 23 -80 -80 -100 10 23 5 7 100 23 5 7 1k 23 5 7 10k 23 5 7100k -100 10 23 5 7 100 23 5 7 1k 23 5 7 10k 23 5 7100k Input frequency, f -- Hz Input frequency, f -- Hz CH Sep -- f 0 CH Sep -- f Channel separation, CH Sep -- dB VCC = 14.4 V RL = 4 Rg = 10 k VO = 0 dBm 0 Channel separation, CH Sep -- dB -20 -20 VCC = 14.4 V RL = 4 Rg = 10 k VO = 0 dBm -40 -40 31 -60 34 32 -60 41 4 2 43 -80 -80 -100 10 23 5 7 100 23 5 7 1k 23 5 7 10k 23 5 7100k -100 10 23 5 7 100 23 5 7 1k 23 5 7 10k 23 5 7100k Input frequency, f -- Hz 1 Input frequency, f -- Hz VNO -- Rg Ripple rejection ratio, SVRR -- dB VCC = 14.4 V RL = 4 DIN AUDIO SVRR -- fr 0 Output noise voltage, VNO -- mVrms 7 5 3 2 -20 VCC = 14.4 V RL = 4 Rg = 0 VCCR = 0 dBm -40 0.1 7 5 3 2 -60 -80 0.01 10 23 5 7 100 23 Input resistor, Rg -- 5 7 1k 23 5 7 10k 23 5 7100k -100 10 23 5 7100 23 5 7 1k 23 5 710k 23 5 7100k Ripple frequency, fr -- Hz 100 300 100 7 5 Pd, ICC -- PO VCC = 14.4 V RL = 4 Rg = 600 f = 1 kHz All channels driven ICCO -- Ta VCC = 14.4 V RL = OPEN Rg = 0 Quiescent current, ICCO -- mA 250 Power dissipation, Pd -- W 3 2 Pd [W ] [A] 10 Current drain, ICC -- A 200 10 7 5 3 2 I CC 150 1 100 50 1 0.01 2 3 5 7 0.1 23 57 1 23 5 7 10 23 0.1 5 7 100 0 -60 -40 -20 0 20 40 60 80 100 Output power, PO -- W Ambient temperature, Ta -- C No. 6629-8/9 LA4743A THD -- Ta Total harmonic distortion, THD -- % 10 7 5 3 2 1 7 5 3 2 0.1 7 5 3 2 -40 -20 0 20 40 60 80 100 VCC = 14.4 V RL = 4 Rg = 600 f = 1 kHz PO = 2 W All channels driven 0.01 -60 Ambient temperature, Ta -- C 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 October, 2000. Specifications and information herein are subject to change without notice. PS No. 6629-9/9 |
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