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Ordering number:ENN3607A
Monolithic Linear IC
LA4620
Two-channel Audio Power Amplifier
Overview
The LA4620 is a two-channel high-power audio amplifier for automotive stereo and general-purpose audio amplification equipment. The LA4620 has a 6 to 22V operating supply voltage range. Each channel uses a bridge configuration to obtain high output power from low supply voltages. Typical output power is 17W per channel. The LA4620 incorporates a thermal protection circuit, an output short-circuit protection circuit and a pop suppression circuit. It has low-power, logic-level standby control and mute control inputs. The LA4620 is available in 23-pin SIPs and operates from a 15V supply.
Package Dimensions
unit:mm 3160-SIP23HZ
[LA4620]
37.0 30.0
R1.7
4.5
13.8
9.5 3.6
16.8
1
2.0 0.5 0.9
23
R=0.4 0.4
1.8
2.45
Features
* 17W output power per channel. * 6 to 22V supply voltage range. * Pop suppression. * Logic-controlled standby mode. * Thermal protection. * Short-circuit protection. * 60dB channel separation. * 58dB supply voltage ripple rejection. * 0.2% harmonic distortion. * 23-pin SIP.
1.5
SANYO : SIP23HZ
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
40500TN (KT)/2071TS (US) No.3607-1/8
LA4620 Specifications
Maximum Ratings at Ta = 25C
Parameter Supply voltage Allowable power dissipation Operating temperature Storage temperature Symbol VCC max Pd max Topr Tstg Conditions Ratings 24 37.5 -20 to +75 -40 to +150 Unit V W
C C
Recommended Operating Conditions at Ta = 25C
Parameter Supply voltage Supply voltage range Load resistance Symbol VCC VCC RL Conditions Ratings 12, 15 6 to 22 4 Unit V V
Note When operating at 22V with a load of 4, ensure that the output power, PO, does not exceed 1W per channel. Electrical Characteristics at Ta = 25C, VCC=15V, f=1kHz, RL=4k, Rg=600 unless otherwise noted
Parameter Quiescent current Standby current Output power Total harmonic distortion Input resistance Voltage gain Output noise voltage Channel separation Supply voltage ripple rejection Offset voltage Symbol ICCO IST PO1 PO2 THD RIN VG VNO1 VNO2 CH SEP SVRR VOS Rg=0, bandpass frequency range=20Hz to 20kHz Rg=10k, bandpass frequency range=20Hz to 20kHz Rg=10k, VO=0dBm Rg=0, fR=100Hz, VCCR=0dBm Rg=0 45 45 -180 VCC=12V, THD=10% VCC=15V, THD=10% PO=1W 17 42 Conditions Ratings min 50 10 14 ty p 75 1 13 17 0.2 24 44 0.2 0.5 60 58 +180 1.0 31 46 0.5 1.0 max 120 10 Unit mA A W W % k dB mV mV dB dB mV
Allowable power dissipation, Pd max - W
Pd max - Ta
- C/W
f - Sf
Ambient temperature, Ta - C
Heat sink thermal resistance, f
Heat sink area, Sf - cm2
No.3607-2/8
LA4620 Test Circuit
Pin Description
Number 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 Name VCC RIP INPUT1 NF2 NF1 GN D NF3 NF4 INPUT2 STANDBY VCC BS4 MUTE OUT4 GND NC OUT3 BS3 BS1 OUT1 GND OUT2 BS2 Supply voltage Ripple filter Channel 1 input Channel 1 negative feedback input Channel 1 negative feedback input Ground Channel 2 negative feedback input Channel 2 negative feedback input Channel 2 input Standby switch Supply voltage Channel 2 bootstrap capacitor Muting control Channel 2 output Ground No connection Channel 2 output Channel 2 bootstrap capacitor Channel 1 bootstrap capacitor Channel 1 output Ground Channel 1 output Channel 1 bootstrap capacitor Description
No.3607-3/8
LA4620
PO - VCC
Channel separation, CH sep - dB Output power, PO - mW
CH sep - f
Supply voltage, VCC - V
Frequency, f - Hz
THD - PO
Total harmonic distortion, THD - % Ripple rejection ratio, SVRR - dB
SVRR - VCCR
Output power, PO - W
Supply voltage ripple rejection, VCCR - V
THD - PO
Total harmonic distortion, THD - % Ripple rejection ratio, SVRR - dB
SVRR - VCC
Output power, PO - W
Supply voltage, VCC - V
f Characteristics
Amplitude response - W
Frequency, f - Hz
No.3607-4/8
LA4620
ICCO, IST - VCC
Quiescent current, ICCO - mA Output noise voltage, VNO - mV Standby current, IST - A
VNO - Rg
Supply voltage, VCC - V
Single source impedance, Rg -
Pd - PO
Output noise voltage, VNO - mV Power dissipation, Pd - W
VNO - VCC
Output power, PO - W
Supply voltage, VCC - V
ICC - PO
Total harmonic distortion, THD - %
THD - VCC
Supply current, ICC - A
Output power, PO - W
Supply voltage, VCC - V
Allowable power dissipation, Pd max - W
Pd max - VCC
Quiescent current, ICCO - mA
ICCO - Ta
Supply voltage, VCC - V
Ambient temperature, Ta - C No.3607-5/8
LA4620
PO - Ta ON Time - C9
Ambient temperature, Ta - C
Startup time, ON time - s
Output power, PO - W
Input 1 coupling capacitor, C9 - F
Center voltage - V
Standby voltage - V
Functional Decription
Standby Mode Control Applying 1.5V or more to R3 at STANDBY SW enables the amplifier. The maximum input current is 400A. Mute Control Pulling MUTE to ground mutes the amplifier. The startup time and recovery time when MUTE is pulled HIGH can be adjusted by changing C9. Short-circuit Protection The LA4620 incorporates a protection circuit for short circuits between output pins. However, this is inadequate for short circuits to ground or the supply. See the design notes.
No.3607-6/8
LA4620 Sample Printed Circuit Pattern
Note Board size : Surface finish : 125 x 85mm Copper foil
Design Notes
Input Capacitors C1 and C4 are input coupling capacitors. They should both be 4.7F or less. Feedback Capacitors C2 and C5 from the negative feedback network. They sould both be between 47 and 100F. Supply Decoupling Capacitor C7 should be 100F. Supply Ripple Filter Capacitors C8 and C14 smooth the supply voltage. Both should be at least 1,000F, and one of at least 2,000 F can be used. Startup Time Capacitor C9 determines the amplifier startup time. Bootstrapping Capacitors C10, C13, C15 and C18 improve the device linearity for a wide range of input signals. These capacitors should be between 47F and 100F to improve the low-frequency response. Oscillation Suppression The R1 and C3, and R2 and C6 networks suppress oscillation. Use ceramic or mylar capacitors of 0.1F or more. Avoid using very large capacitances as these can cause high-frequency distortion. C11, C12, C16, and C17 from RC networks with R4, R5, R6 and R7, respectively. Use mylar capacitors of 33nF or more to prevent instability caused by circuit board layout. Standby Control Current Limiting Resistor R3 limits the current applied to STANDBY SW. It should be 10 or more. Heatsinking The LA4620 should always be operated with a heatsink. If the heatsink does not provide adequate thermal dissipation, the thermal protection circuit will attenuate the signal level when the device overheats to prevent longterm thermal stress. Short-circuit Protection If outputs can be shorted either to ground or the supply, use an external circuit to protect the device as shown in the following figure.
No.3607-7/8
LA4620
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 expor ted without obtaining the expor t 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 April, 2000. Specifications and information herein are subject to change without notice.
PS No.3607-8/8

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