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| Ordering number: EN4335A Monolithic Linear IC LA4800V 3 V Stereo Headphone Power Amplifier Overview The LA4800V is a headphone stereo power amplifier IC that features a high signal-to-noise ratio, high ripple rejection, low distortion and low current consumption, making it ideal for portable CD players. Package Dimensions unit : mm 3178-SSOP16 [LA4800V] Functions . Headphone stereo power amplifier . Beep tone . Power switch . Power mute switch Features . 96 dB (typ) high S/N ratio at 7 V . 76 dB (typ) high ripple rejection . 0.07% (typ) low distortion with R = 16 . 6.2 mA (typ) low current consumption . Outputs do not require electrolytic capacitors. . Available in 16-pin SSOPs L SANYO : SSOP16 Specifications Maximum Ratings at Ta = 25C Parameter Maximum supply voltage Power dissipation Operating temperature range Storage temperature range Symbol VCC max Pd max Topr Tstg Conditions Ratings 4.5 375 -15 to 50 -40 to 150 Unit V mW C C 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 Bussiness Headquarters TOKYO OFFICE Tokyo Bldg., 1-10, 1 Chome, Ueno, Taito-ku, TOKYO, 110-8534 JAPAN 32896HA(II)/60393TS No.4335-1/11 LA4800V Recommended Operating Ranges at Ta = 25C Parameter Supply voltage Load resistance Operating supply voltage range Symbol VCC RL VCC op Conditions Ratings 3.0 16 to 32 1.8 to 3.6 Unit V V Operating Characteristics at Ta = 25C, VCC = 2.5 V, RL = 16 , f = 1 kHz unless otherwise noted. Values in parentheses indicate VCC = 3.0 V Parameter Symbol ICCO1 ICCO2 ICCO3 Voltage gain Channel balance Output power Total harmonic distortion Output noise voltage Crosstalk Ripple rejection Mute attenuation Beep tone output voltage Output DC offset voltage Power ON current sensitivity Power OFF voltage sensitivity Mute OFF current sensitivity Mute OFF voltage sensitivity Mute ON voltage sensitivity VG VRL PO THD VNO CT R.R VOFF VO BEEP VDC OFF l1 ON V1 OFF l16 OFF V16 OFF V16 ON Conditions IC OFF Mute ON No input signal VO = -10 dBm VO = -10 dBm VCC = 3.0 V, THD = 10% VO = 0.35 V Rg = 1 k, DIN AUDIO f = 1 kHz, TUN, VO = -10 dBm VCC = 1.7 V, f = 100 Hz, VCR = -20 dBm, TUN = 100 Hz THD = 1% VI = -13.5 dBm (sine wave) VI = 0 V, Rg = 1 k VCC = 1.7 V, V5 ^ 1.0 V VCC = 1.7 V, V5 % 0.1 V VCC = 1.7 V, V5 ^ 1.0 V VCC = 1.7 V VCC = 1.7 V 10.3 -1 15 min typ 0.05 1.6 (1.65) 6.2 (6.8) 11.8 0 25 0.075 7.8 45 76 -96 3.0 0 50 0.6 4.5 1.25 0.9 max 1.0 3.0 9.0 13.3 1 0.2 15 Unit A mA mA dB dB mW % V dB dB dB mV mV A V A V V Quiescent supply current 35 65 -80 1.5 -20 0.5 1.0 20 60 6.0 1.5 1.0 Maximum power dissipation, Pd max - mW Ambient temperature, Ta - C No.4335-2/11 LA4800V Pin Assignment and Block Diagram Top view Unit (resistance: ) Test Circuit Unit (resistance: , capacitance: F) No.4335-3/11 LA4800V Sample Application Circuit Signal from microcontroller Unit (resistance: , capacitance: F) Pin Description VCC = 2.5 V Pin number Pin name VDC (V) Unit (resistance: ) Equivalent circuit Pin description 1 PWR SW 0 to 0.7 Power switch Turns ON the power to the VCC pin. 2 IN A 1.1 Power input pins 10 k input resistance 4 IN B 3 IN C 1.1 Power amplifier common input pin Usually connected to Vref Continued on next page. No.4335-4/11 LA4800V Continued from preceding page. Pin number Pin name VDC (V) Unit (resistance: ) Equivalent circuit Pin description F 5 VREFOUT 1.1 1.1 V fixed bias 6 PRE GND Preamplifier ground 7 VREFCONT 1.1 1.1 V reference control pin 8 RF OUT 2.2 F Preset to approximately VCC x 0.88 V 9 Beep IN 1.1 Beep tone input pin Active only when mute is ON. 10 RF CONT 2.2 to RF RF control pin 11 VCC Power supply 12 13 15 OUT B OUT C OUT A 1.1 1.1 1.1 Power output pins Pin 13 is the headphone center common drive. (No electrolytic capacitors required) 14 PWR GND Power amplifier ground 16 MUTE SW 0 to 1.85 The mute pin is floating when ON, and tied to VCC through a 100 k when OFF. No.4335-5/11 LA4800V External Components Description Components C1, C2 C3, C4 C5, C4 C6 C8 C9, C10, C11 C12 R1, R2 R3, R4, R5 R6 Recommended value 1 to 4.7 F 3.3 to 10 F 4.7 to 10 F 0.1 to 1 F 220 F 0.22 to 0.47 F 0.1 to 1.0F 0.5 to 4.3 100 k Description Input coupling capacitors Reference bias (VREF) decoupling capacitors Ripple filter capacitors. Increasing the capacitance also increases the distortion and the supply rise time at turn ON. Input coupling capacitor for the beep tone. Choose a value that does not attenuate the beep tone signal. Supply line coupling capacitor Oscillation damping capacitors. Film capacitors are recommended. Mute time setting capacitor. See the description in the Operating Notes. Beep tone input signal adjustment resistors. Follow the manufactures instructions. Power amplifier oscillation damping resistors. Mute OFF pin 16 bias setting resistor. The internal 300 k resistor and this 100 k resistor together set the mute switch (pin 16) threshold. Operating Notes Beep tone operating principle Signal from microcontroller Unit (resistance: , capacitance: F) The design of the above when mute is ON (pin 16 open) is as follows: The output voltage VO as function of RL is VO = RL RL+ 3k+ 1k 16 x VA For example, if RL = 16 and VA = 0.5 V (VA is the adjusted input voltage on pin 9), VO = x 0.5 2 mV 16 + 3k+ 1k The beep tone output voltage VO is determined by the above equation. However, the oscillation damping RC components are connected to the PWR output and hence these RC components will also influence the actual value of VO. When using the beep tone, the impedance of C10, connected to the common output (pin 13), must be greater than the impedance of C9 and C11, i.e. C10 must be greater than C9 and C11. No.4335-6/11 LA4800V Mute time adjustment The mute ON/OFF switching waveforms are shown in the figure above. The settling time tS is determined by the capacitor Cr connected to pin 16. The recommended value of Cr is 1 F. If the value used is less than 1 F, pop noise will increase. The setting time for different values of Cr are shown in the table below. Cr (F) 0.1 1.0 2.2 tS OFF(ms) 15 150 300 tS ON (ms) 3.2 30 56 No.4335-7/11 LA4800V Quiescent current, ICCO - mA Mute current, IMUTE - mA Voltage gain, VG - dB Channel 2 ON - A Unit (capacitance: F) Supply voltage, VCC - V Total harmonic distortion, THD - % ICCO STBY Input frequency, fi - Hz Voltage gain, VG - dB B.P.F = 400 Hz to 80 kHz Channel 2 ON Supply voltage, VCC - V Total harmonic distortion, THD - % Input voltage, VIN - dBm Output power, PO - mW B.P.F = 400 Hz to 80 kHz Channel 2 ON Supply voltage, VCC - V Supply voltage, VCC - V Output noise voltage, VNO - V Supply voltage, VCC - V Crosstalk, CT - dB Input frequency, fi - Hz No.4335-8/11 LA4800V Beep tone output voltage, VO Beep - mV Beep tone output voltage, VO Beep - mV Unit (resistance = , capacitance = F) Input voltage, VIN - dB Beep tone output voltage, VO Beep - mV Ripple rejection ratio, SVRR - dB Input frequency, fi - Hz Mute OFF Mute ON Supply voltage, VCC - V Ripple rejection ratio, SVRR - dB Supply voltage, VCC - V tON, tOFF - s Unit (resistance = ) Supply voltage, VCC - V Mute ON/OFF threshold region Mute OFF (PWR ON) CMUTE - F Mute OFF, 100k, 1 F (pin 16) Quiescent current, ICCO - mA Pin 16 voltage, VCONT16 - V Mute ON (PWR OUT = 80 dB) Supply voltage, VCC - V Ambient temperature Ta - C No.4335-9/11 ICCO STBY - A LA4800V Vref DC - Ta RL = 16 Headphone load DC voltage, Vref DC - V Voltage gain, VG - dB Ambient temperature, Ta - C Ambient temperature, Ta - C RL = 16 Headphone load RL = 16 Headphone load Voltage gain, VG - dB Ambient temperature, Ta - C Beep tone output voltage, VO Beep - mV Voltage gain, VG - dB Ambient temperature, Ta - C Beep tone voltage, VO Beep - mV (sine wave) (sine wave) Ambient temperature, Ta - C Beep tone output voltage, VO Beep - mV Ambient temperature, Ta - C (sine wave) Ambient temperature, Ta - C No.4335-10/11 LA4800V 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 March, 1996. Specifications and information herein are subject to change without notice. PS No.4335-11/11 |
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