Ordering number : EN4022D Monolithic Linear IC LA4525 For Radio Cassette Recorders Dual AF Power Amplifier Overview The LA4525 requires only a small number of external components to drive either two 4Ω speakers or one 8Ω speaker. The output power is typically 0.65W when driving two 4Ω speakers. Features • Two-channel (dual) or single-channel (BTL) operation • Requires only a few external components • 0.65W (typ) output power into two 4Ω speakers • Wide power supply range : 3 to 15V • 8-pin DIP (No heat sink needed) Specifications Absolute Maximum Ratings at Ta = 25°C Parameter Symbol Maximum supply voltage VCC max Allowable power dissipation Pd max Operating temperature Storage temperature Conditions Ratings Rg = 0 Unit 15 Note V 1.5 W Topr −25 to +75 °C Tstg −40 to +150 °C 3 Note : Mounted on a 50×50×1.6mm heat dissipating board Recommended Operating Conditions at Ta = 25°C Parameter Supply voltage Symbol Conditions Ratings Unit VCC Load resistance range RL Supply voltage range VCC op Not in excess of package Pd 6 V 4 Ω 3 to 15 V Any and all SANYO Semiconductor Co.,Ltd. products described or contained herein are, with regard to "standard application", intended for the use as general electronics equipment (home appliances, AV equipment, communication device, office equipment, industrial equipment etc.). The products mentioned herein shall not be intended for use for any "special application" (medical equipment whose purpose is to sustain life, aerospace instrument, nuclear control device, burning appliances, transportation machine, traffic signal system, safety equipment etc.) that shall require extremely high level of reliability and can directly threaten human lives in case of failure or malfunction of the product or may cause harm to human bodies, nor shall they grant any guarantee thereof. If you should intend to use our products for applications outside the standard applications of our customer who is considering such use and/or outside the scope of our intended standard applications, please consult with us prior to the intended use. If there is no consultation or inquiry before the intended use, our customer shall be solely responsible for the use. Specifications of any and all SANYO Semiconductor Co.,Ltd. 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. 41608 MS JK/32896HA(II)/D0192TS/4162TS No.4022-1/8 LA4525 Electrical Characteristics at VCC = 6V, Ta = 25°C, RL = 4Ω, f = 1kHz, Rg = 600Ω, Dual operation unless otherwise noted Parameter Symbol Condition Quiescent supply current ICCO Rg = 0Ω Output power PO1 THD = 10% PO2 VCC = 9V, RL = 8Ω, THD = 10% VG VO = 0dBm THD PO = 0.1W Voltage gain Total harmonic distortion Output noise voltage VNO Supply voltage ripple rejection CH Sep Input resistance typ max Unit 10 15 30 mA 0.45 0.65 W 1.0 38 Rg = 0Ω, DIN AUDIO filter SVRR Channel separation min W 40 42 dB 0.2 0.7 % 100 400 µV Rg = 0Ω, fR = 100Hz, VR = 0dBm 35 43 dB VO = 0dBm, Rg = 0Ω 45 55 dB 70 100 Ri 130 kΩ Package Dimensions unit : mm (typ) 3001D Pd max -- Ta 9.14 7.62 5 6.4 8 4 0.25 1 1.4 (3.0) 1.6 1.5 1.25 1.2 Mounted on Sanyo recommended board Independent IC 0.8 0.4 0 -20 3.2 3.9MAX 1.0 Allowable power dissipation, Pd max -- W 2.0 20 40 60 80 100 Ambient temperature, Ta -- °C 0.51MIN (0.76) 0 2.54 0.5 120 140 160 JK780601 SANYO : DIP8(300mil) No. 4022-2/8 LA4525 Block Diagram Dual Operation Example Sample Printed Circuit Pattern No. 4022-3/8 LA4525 Pin Description Number Name 1 OUT1 Channel 1 output Description 2 VCC Supply voltage 3 OUT2 Channel 2 output 4 POWER GND 5 BTL IN 6 IN2 Channel 2 input 7 IN1 Channel 1 input 8 PRE GND Power amplifier ground Bridge test load input Preamplifier ground External Components Comparison External components Existing Sanyo ICs Pin Voltages LA4525 Output capacitors c c Input capacitors c c Bootstrap capacitors c × Feedback capacitors c × Filter capacitors c × Oscillation damping mylars c × Dual-mode operation total 11 4 Pin number Pin name Pin voltage 1 OUT1 2.8V 2 VCC 6V 3 OUT2 2.8V 4 POWER GND 0V 5 BTL IN 65mV 6 IN2 1.4V 7 IN1 1.4V 8 PRE GND 0V No. 4022-4/8 LA4525 1.0 7 5 3 2 VCC = 6V RL = 4Ω PO = 0.1W (VO = 0.632V) Rg = 600Ω 3 5 7 1k 2 3 5 7 10k Frequency, f -- Hz VCC = 9V RL = 8Ω Rg = 600Ω f = 1kHz 600 1.4 Pd 1.0 300 0.6 200 0.4 I CC 5 7 0.1 2 3 5 7 0µ F 220 µF Hz Dual VCC = 6V RL = 4Ω VO = 0dBm Rg = 600Ω -8 3 5 7 1k 2 3 5 7 10k Frequency, f -- Hz 2 3 0.2 2 3 5 7 10k 2 3 5 Signal source resistance, Rg -- Ω 7 100k 2 JK452514 7 2 1.0 0 JK452509 4 6 8 60 10 JK452511 CH Sep -- f VCC = 6V RL = 4Ω VO = 0dBm Rg = 0 ch2Jch1 2 h Jc h1 50 c J h2 ch1J 1 ch ch2 c 40 30 5 7 100 2 3 5 7 1k 2 3 5 7 10 k Frequency, f -- Hz Ripple rejection, SVRR -- dB 0.4 0 7 1k 2 50 2 3 JK452513 SVRR -- fR 60 0.6 5 0.4 JK452512 0.8 3 THD = 10% f = 1kHz Rg = 600Ω 0.6 20 3 5 7 100k VCC = 6V RL = 4Ω Rg = 0J0.1mV 2 0.1 Supply voltage, VCC -- V VNO -- Rg 1.0 7 PO -- VCC 0 0 Channel separation, CH sep -- dB T= 10 0 40k 2 5 0.8 VG = 40dB/1kHz -6 5 7 100 3 0.2 0 -4 -10 2 3 2 70 fH =1 0.4 0.2 JK452510 µF 470 C OU Frequency response -- dB 1.0 f Response 0 -2 2 1.0 Output power, PO -- W 2 I CC 200 1.2 0.2 100 3 0.6 JK452508 0.8 2 300 Output power, PO -- W 400 0 0.01 0.8 0 0.01 1.2 500 400 100 3 ICC,Pd -- PO 700 Current drain, ICC -- mA 2 1.0 4Ω 2 1.2 Pd R L= 5 7 100 VCC = 6V RL = 4Ω Rg = 600Ω f = 1kHz 8Ω 0.1 7 Output noise voltage, VNO -- mV Current drain, ICC -- mA 500 Power dissipation, Pd -- W Output power, PO -- W Total harmonic distortion, THD -- % 2 5 3 ICC,Pd -- PO 600 Power dissipation, Pd -- W THD -- f 3 VCC = 6V RL = 4Ω Rg = 0 VCCR = 0dBm (775mV) 40 30 20 10 3 5 7 100 2 3 5 7 Ripple frequency, fR -- Hz 1k 2 3 JK452515 No. 4022-5/8 LA4525 Rising and falling waveforms BTL Operation Example THD -- PO 3 2 10 7 5 BTL VCC = 6V RL = 8Ω Rg = 600Ω f = 1kHz 1.6 3 2 1.0 7 5 3 BTL RL = 8Ω THD = 10% Rg = 600Ω f = 1kHz 1.2 0.8 0.4 2 0.1 7 2 PO -- VCC 2.0 Output power, PO -- W Total harmonic distortion, THD -- % 5 3 5 7 0.1 2 3 5 7 Output power, PO -- W 1.0 2 3 JK452517 0 0 2 4 Supply voltage, VCC -- V 6 8 JK452518 No. 4022-6/8 LA4525 00µ -4 VG = 46dB/1kHz 500 C O 1, C 470 O2 µF 220 µF Frequency response -- dB -2 F + Co1 -6 -8 BTL VCC = 6V RL = 8Ω VO = 0dBm Rg = 600Ω -10 2 3 5 7 100 8Ω + Current drain, ICC -- mA = 10 0 ICC, Pd -- PO 600 400 1.2 BTL Pd = VCC×ICC−PO VCC = 6V Rg = 600Ω f = 1kHz 1.0 0.8 Pd 300 0.6 200 0.4 I CC 100 Power dissipation, Pd -- W f Response 2 0.2 Co2 2 3 5 7 1k 2 3 5 7 10k Frequency, f -- Hz 2 3 5 7100k 2 JK452519 0 0.01 2 3 5 7 0.1 2 3 5 7 1.0 Output power, PO -- W 2 3 0 JK452520 Handling Instructions and Precautions Internal Circuits Figure 1. Input pins (6 and 7) and BTL input pin (5) Figure 2. Output pins (1 and 3) External Components • The starting time, ts, can be varied by changing the value of the input capacitor. A value of 2.2µF is recommended. A smaller value will result in a lower starting time, and a larger value, a higher starting time. • The output capacitor should have a value of 470µF. A lower value will cause the low-frequency roll-off and low-power characteristics to deteriorate. • A value of 470µF is recommended for the power supply capacitor, although this can change according to the design setup conditions. • In dual mode, BTL IN (the channel 2 negative feedback connection) should be left floating. BTL mode • The output capacitors should have a value of 470µF. If these are omitted, a ‘‘popping’’ noise occurs. Also, any output offset will cause a current to flow which could damage the load under quiescent DC conditions. • The output capacitors can be replaced with a single 220µF bipolar capacitor. A larger value can cause switching noise when power is applied to the device. No. 4022-7/8 LA4525 • The voltage gain is fixed internally to 40dB in dual mode and 46dB in BTL mode. These values cannot be altered by connecting external components. • Phase correction capacitance (600pF/TOTAL) is incorporated in the internal stages. Oscillation damping components (R and C) are also incorporated in the output pin circuits. • Power consumption Note that the 8-pin DIP does not have a heat dissipating surface and that the power dissipation ratings are critical. The maximum power dissipation of the device is 1.25W, and 1.5W when the device is mounted on the recommended PCB. The actual power dissipated depends on the supply voltage and the load conditions. Ensure that the device is kept within its maximum rating. For AC supplies, transformer tappings may need to be adjusted to keep the device within maximum ratings. Pd max = VCC2 2 π RL + ICCO × VCC Note For BTL mode operation, the value of RL used in the calculation should be 1/2 the actual value. • If the speaker plug jacks short to ground when connected, a protection resistor should be inserted in the output line. • If the device is operated at or near its rated values, these values can be exceeded by small changes in operating conditions, leading to device breakdown. Accordingly, ensure that a safety margin is maintained so as not to exceed the maximum ratings. • Check the PCB surface after soldering to ensure that no pins have been accidentally shorted. Any short between pins could cause poor operating characteristics or permanently damage the device when power is applied. • If making the PCB, check the printed wiring to ensure that no feedback loops occur between input and output. SANYO Semiconductor Co.,Ltd. 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 Co.,Ltd. products described or contained herein. SANYO Semiconductor Co.,Ltd. strives to supply high-quality high-reliability products, however, any and all semiconductor products fail or malfunction with some probability. It is possible that these probabilistic failures or malfunction could give rise to accidents or events that could endanger human lives, trouble that could give rise to smoke or fire, or accidents 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 Co.,Ltd. products described or contained herein are controlled under any of applicable local export control laws and regulations, such products may require 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 consent 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 Co.,Ltd. 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. Upon using the technical information or products described herein, neither warranty nor license shall be granted with regard to intellectual property rights or any other rights of SANYO Semiconductor Co.,Ltd. or any third party. SANYO Semiconductor Co.,Ltd. shall not be liable for any claim or suits with regard to a third party's intellctual property rights which has resulted from the use of the technical information and products mentioned above. This catalog provides information as of April, 2008. Specifications and information herein are subject to change without notice. PS No. 4022-8/8