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LA4510 - LA4510
240mW Power Amplifier
Especially suited micro cassette recorder, mini cassette recorder, headphone stereo applications.
Operating supply voltage range current dissipation (7mA typ/VCC=3V). Output power 240mW VCC=3V, RL=4, THD=10% 40mW VCC=3V, RL=32, THD=10% Built-in muting circuit operated time power switch capable varying starting time making noise low. Soft clipping.
0.99 0.25 1.35
Absolute Maximum Ratings 25°C
Parameter Maximum supply voltage Maximum output current Allowable power dissipation Operating temperature Storage temperature Symbol
Operating Conditions 25°C
Parameter Recommended supply voltage Recommended load resistance Symbol Conditions Ratings Unit
Operating Characteristics 25°C, VCC=3.0V, RL=4, f=1kHz, Sample Application Circuit
Parameter Quiescent current Voltage gain Output power Total harmonic distortion Output noise voltage Output ripple voltage Symbol ICCO1 ICCO2 signal signal, VCC=4.5V R1=100 THD=10% PO=100mW Rg=1k, BW=20Hz 20kHz Rg=0, fR=100Hz, VR=50mV Conditions Ratings Unit
SANYO products described contained herein have specifications that handle applications that require extremely high levels reliability, such life-support systems, aircraft's control systems, other applications whose failure reasonably expected result serious physical and/or material damage. Consult with your SANYO representative nearest before using SANYO products described contained herein such applications. SANYO assumes responsibility equipment failures that result from using products values that exceed, even momentarily, rated values (such maximum ratings, operating condition ranges,or other parameters) listed products specifications SANYO products described contained herein.
SANYO Electric Co.,Ltd. Semiconductor Company
TOKYO OFFICE Tokyo Bldg., 1-10, Chome, Ueno, Taito-ku, TOKYO, 110-8534 JAPAN
Equivalent Circuit Block Diagram
Sample Application Circuit Speaker load
Description external parts (1µF) Input capacitor (Coupling capacitor input signal) Decreasing capacitance value lowers frequency response frequencies. (22µF) Feedback capacitor (Bypass feedback signal) Decreasing capacitance value lowers frequency response frequencies increasing capacitance value makes starting time latar. (4.7µF) Muting capacitor Decreasing capacitance value makes starting time earlier removing causes noise. Increasing capacitance value makes starting time later. (220pF) Phase compensation capacitor (Phase compensation local feedback) Decreasing capacitance value causes frequency response extend high frequencies, thereby oscillation liable occur. Increasing capacitance value worsens distortion factor high frequencies. (0.47µF) Oscillation blocking capacitor Decreasing capacitance value causes oscillation liable occur. Using ordinary electrolytic capacitor cause oscillation occur temperature. tantalum alsicon electrolytic capacitor that good temperature characteristic. (470µF) Output capacitor (Cutoff speaker) Decreasing capacitanc value causes insufficient power frequencies. (220µF) Bootstrap capacitor (Feedback from output stage) Decreasing capacitance value causes insufficient power frequencies, especially when voltage reduced. (220µF) Power capacitor (Drop power impedance) Decreasing capacitance value causes motor noise, etc. entered easily. Removing cause oscillation occur. (47µF) Capacitor ripple filter (Filter bias voltage) Decreasing capacitance value causes circuit subjected influence power supply, thereby ripple liable occur. Feedback resistor (Setting voltage gain) (100) Decreasing resistance value increases voltage gain, worsens distortion factor, thereby gain varies. Increasing resistance value causes oscillation liable occur.
Setting Starting Time LA4510 contains muting circuit operated time power switch ON/OFF. Thus, noise coming from power amplifier preamplifier rejected. starting time depends capacitance value feedback capacitor well muting capacitor (C3).
Voltage Gain Voltage gain depends ratio internal resistance value (20k) external resistance value (R1). However, since setting open loop voltage gain little side (62dB) soft cliping, recommendable voltage gain greater than recommended. used voltage gain less than recommended, take care cause oscillation occur.
Action Prevent Oscillation oscillation occurs, check larger capacitance value smaller value capacitance value same, acts more effectively against oscillation. Using electrolytic capacitor cause oscillation occur temperature. recommendable tantalum alsicon electrolytic capacitor that good temperature characteristic. oscillation that occurs decreased voltage gain, increase capacitance value impossible effectively against oscillation, ceramic capacitor 1000pF across GND. this case, distortion factor high frequencies worsens some extent.
Removal Bootstrap Capacitor applications where more power than required availabel (approximately rating), possible remove bootstrap capacitor (pin (7)-to-pin short). However, since this causes clipping unbalance occur, this unbalance must compensated resistor diode. simple compensation method shown below. This method makes possible attain clipping balance certain supply voltage only.
Sample Application Circuit Headphone load
Sample Application Circuit Bridge
*Note) C10, C11, tantalum alsicon electrolytic capacitor. oscillation occurs, (0.1 0.2µ ceramic capacitor).
Proper Cares Using Maximum ratings used vicinity maximum ratings, even slight variation conditions cause maximum ratings exceeded, thereby leading breakdown. Allow ample margin variation supply voltage, etc. range where maximum ratings exceeded. Pin-to-pin short power applied when space between pins shorted, breakdown deterioration occur. When mounting board applying power, make sure that space between pins shorted with solder, etc. Printed circuit pattern When designing printed circuit pattern, make power supply, output, ground lines thick short arrange pattern parts that feedback loop formed between input output. Place power capacitor oscillation blocking capacitors close pins possible prevent oscillation from occurring. Refer sample printed circuit pattern.
Specifications SANYO products described contained herein stipulate performance, characteristics, functions described products independent state, guarantees performance, characteristics, functions described products mounted customer's products equipment. verify symptoms states that cannot evaluated independent device, customer should always evaluate test devices mounted customer's products equipment. SANYO Electric Co., Ltd. strives supply high-quality high-reliability products. However, semiconductor products fail with some probability. possible that these probabilistic failures could give rise accidents events that could endanger human lives, that could give rise smoke fire, that could cause damage other property. When designing equipment, adopt safety measures that these kinds accidents events cannot occur. Such measures include limited protective circuits error prevention circuits safe design, redundant design, structural design. event that SANYO products(including technical data,services) described contained herein controlled under applicable local export control laws regulations, such products must expor without obtaining expor license from authorities concerned accordance with above law. part this publication reproduced transmitted form means, electronic mechanical, including photocopying recording, information storage retrieval system, otherwise, without prior written permission SANYO Electric Co., Ltd. information described contained herein subject change without notice product/technology improvement, etc. When designing equipment, refer "Delivery Specification" SANYO product that intend use. Information (including circuit diagrams circuit parameters) herein example only guaranteed volume production. SANYO believes information herein accurate reliable, guarantees made implied regarding infringements intellectual property rights other rights third parties.
This catalog provides information February, 2000. Specifications information herein subject change without notice.
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