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| Ordering number : ENA0508 Monolithic Linear IC LA47202P Overview Four-Channel BTL Power Amplifier for Car Audio Systems The LA47202P is a 4-channel BTL power amplifier IC developed for use in car audio applications. The LA47202P adopts a pure complementary output stage circuit structure with a v-pnp transistor for the high side and an npn transistor for the low side to provide both high output power and high quality sound. The LA47202P integrates all the functions required for car audio applications on the same chip, including a standby switch, a muting function, and a full complement of protection circuits. It also features a self diagnostics function. Functions * High output : PO max = 47W (typ.) (VCC = 14.4V, f = 1kHz, JEITA max, RL = 4) : PO max = 29W (typ.) (VCC = 14.4V, f = 1kHz, THD = 10%, RL = 4) : PO max = 22W (typ.) (VCC = 14.4V, f = 1kHz, THD = 1%, RL = 4) * Muting function incorporated (pin 22) * Built-in standby switch (pin 4) * Self diagnostics function incorporated (pin 25) : Output of both output offset detection, shorting to VCC or ground and load shorting signals * Electric mirror noise decrease * Full compliment of protection circuits (shorting to VCC, shorting to ground, load shorting, overvoltage, and thermal protection). * Improved oscillation stability Note 1 : Take care to avoid wrong connection. Otherwise, IC or equipment may suffer breakdown, damage, or deterioration. Note 2 : The protective circuit function is to avoid the abnormal state (wrong connection of the output) temporarily and does not guarantee that IC is not broken. These protective functions do not operate outside the operation guarantee range, and wrong connection of output may cause breakdown of IC. Note 3 : External parts, such as the anti-oscillation part, diode to prevent breakdown, may become necessary depending on the set condition. Check their necessity for each set. Any and all SANYO Semiconductor 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 Semiconductor representative nearest you before using any SANYO Semiconductor products described or contained herein in such applications. SANYO Semiconductor 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 products described or contained herein. D2706 MS PC 20060809-S00002 No.A0508-1/8 LA47202P Specifications Maximum Ratings at Ta = 25C Parameter Maximum supply voltage Symbol VCC max1 VCC max2 Maximum output current Allowable power dissipation Operating temperature Storage temperature Thermal resistance between junction cases IO peak Pd max Topr Tstg j-c Conditions Without signal, t = 1 minute When operating Per channel With an iInfinitely large heat sink Ratings 26 18 4.5 50 -40 to +85 -40 to +150 1 Unit V V A W C C C/W Note) The relationship between the power dissipation (Pd) and the junction-to-case thermal resistance (j-c), heat sink thermal resistance (f) and junction temperature (Tj), case temperature (Tc), and ambient temperature (Ta) is as expressed by the following equation : Tj = Pd (j-c+f) +Ta = Pdxj-c+Tc, *Tc = Pdxf+Ta Note that Tj max must be limited with Tstg max (150C). Recommended Operating Ranges at Ta = 25C Parameter Recommended supply voltage Recommended load resistance Operating supply voltage range Symbol VCC RL VCC op Range not exceceeding Pd max Conditions Ratings 14.4 4 9 to 16 Unit V V Electrical Characteristics at Ta = 25C, VCC = 14.4V, RL = 4, f = 1kHz, Rg = 600 Parameter Quiescent current Standby current Voltage gain Voltage gain difference Output power Symbol ICCO Ist VG VG PO PO max1 PO max2 Output offset voltage Total harmonic distortion Channel separation Ripple rejection ratio Output noise voltage Input resistance Mute attenuation * 0dBm = 0.775Vrms Vnoffset THD CHsep SVRR VNO Ri Matt VO = 20dBm, mute : on 65 THD = 10% VCC = 13.7V, JEITA max JEITA max Rg = 0 PO = 4W VO = 0dBm, Rg = 10k Rg = 0, fr = 100Hz, VCCR = 0dBm Rg = 0, BPF = 20Hz to 20kHz 55 45 -150 0.05 65 60 100 50 80 200 RL = , Rg = 0 Vst = 0V VO = 0dBm 25 -1 24 29 42 47 +150 0.3 26 Conditions min Ratings typ 200 max 400 10 27 +1 mA A dB dB W W W mV % dB dB Vrms k dB Unit No.A0508-2/8 LA47202P Block Diagram VCC VCC1/2 6 20 VCC3/4 0.1F + 2200F IN 1 + 0.47F 11 + - + - 9 7 OUT 1+ OUT 1RL CONTROL 4700pF IN 2 + 0.47F 1 Protective circuit 12 + + PWR GND1 8 OUT 2+ OUT 2RL 5 3 DC 22F + 10 Ripple filter PWR GND2 2 OFFSET DIAG AC GND + 0.47F 16 25 4.7k 5V PRE GND 13 Mute circuit Mute 10k 22 + 1F OUT 3+ OUT 3RL Low Level Mute ON IN 3 + 0.47F 15 + Protective circuit + - 17 19 PWR GND3 18 OUT 4+ OUT 4RL IN 4 + 0.47F 14 + - + - 21 23 STBY +5V ST ON 4 Standby switch PWR GND4 24 The components and constant values in the test circuit are used for confirmation of characteristics and do not guarantee that the application equipment will be free from malfunction or trouble. No.A0508-3/8 LA47202P Description of Operation 1. Standby switch function (pin 4) The pin 4 threshold voltage is set to about 3 VBE. The amplifier is turned ON at the application voltage of 3.0V or more and OFF at 0.5V or less. 2. Muting function (pin 22) When pin 22 is set to the ground potential, the LA47202P goes to the muted state. This supports implementation of an audio muting function. The muting function is turned on when a level of 1V or lower is applied through a 10k resistor, and the function is turned off when this pin is open. The muting time constant can be set with an external RC circuit. 3. Self diagnostics function (pin 25) This function detects abnormal IC states, and outputs a signal from pin 25. Applications can prevent damage to speakers and other problems by using a microcontroller to detect the pin 25 signal and control the standby switch accordingly. (1) Output short-circuit to VCC/ground : Pin 25 becomes LOW. (2) Load short-circuit : Pin 25 repeats HIGH and LOW states according to the output signal. (3) Output offset abnormality : Pin 25 goes low if the OUT pin (VN) voltage becomes lower than the detection level. Problems that can cause an output offset abnormality include input capacitor leakage and half shorts between the input pins and adjacent circuit components. Note that pin 25 is the NPN open collector output (active low). Keep pin 25 open-connection when not using. 4. CONTROL pin (pin 1) The protective circuit response speed is adjusted by the pin 1 capacitor. By adjusting the response speed of the protective circuit, abnormal sound generated when the protective circuit operates at input of the large signal can be prevented. When the capacitance value increases, abnormal sound is more difficult to be generated, but the response speed of the protective circuit becomes lower. The capacitance value must be limited to maximum 0.01F. The recommended value is 4700pF. Check the optimum value for each set. As this is designed so that the protective circuit is activated when pin 1 has the GND potential, the protective circuit becomes normally active when the capacitor is short-circuited. 5. AC GND pin (pin 16) Be sure to use the pin 16 capacitor with the capacity the same as that of the input capacitor and connect it to PREGND the same as that of the input capacitor. 6. Sound quality (low frequencies) The frequency characteristics in low frequency range may be improved by varying the capacitance of input capacitor. Note that this may cause influence on the shock noise, carry out confirmation with each set before varying the capacitance value. 7. Impulse noise related systems While the LA47202P does include an impulse noise prevention circuit, we recommend using the muting function together with this circuit. * When the amplifier is ON, turn ON the muting function simultaneously with power ON. When the output DC potential has stabilized, turn OFF the muting function. * When turning OFF the amplifier, first turn ON the muting function, then turn OFF power supply. No.A0508-4/8 LA47202P 8. Oscillation stability Pay due attention on the following points because parasitic oscillation may occur due to effects of the capacity load, board layout, etc. (1) Capacity load When the capacitor is to be inserted between each output pin and GND so as to prevent electric mirror noise, select the capacitance of maximum 1200pF. (Conditions : Our recommended board, RL = 4) (2) Board layout * Provide the VCC capacitor of 0.1F in the position nearest to IC. * PREGND must be independently wired and connected to the GND point that is as stable as possible, such as the minus pin of the 2200F VCC capacitor. In case of occurrence of parasitic oscillation, any one of following parts may be added as a countermeasure. Note that the optimum capacitance must be checked for each set in the mounted state. * Series connection of CR (0.1F and 2.2) between BTL outputs * Series connection of CR (0.1F and 2.2) between each output pin and GND. Package Dimensions unit : mm (typ) 3236A 29.2 (22.8) (8.5) ( 2.5) 4.5 70 Pd max -- Ta Maximum power dissipation, Pd max -- W 25.6 60 (12.3) (5.0) (R1.7) 18.6 max (14.4) 50 Infinite heat sink j-c=1C/W 21.7 40 (11.0) 30 heat sink(f=3.5C/W) j-c+f=4.5C/W 0.4 1 (2.6) (1.0) 0.52 25 3.5 14.5 20 4.0 4.2 10 2.0 2.0 No heat sink j-a=39C/W -20 0 20 40 60 80 100 120 140 160 0 -40 Ambient temperature, Ta -- C SANYO : HZIP25 No.A0508-5/8 LA47202P 250 ICCO -- VCC RL = Open Rg = 0 12 VN -- VCC RL = Open Rg = 0 Output midpoint voltage, VN -- V 4 6 8 10 12 14 16 18 20 Quiescent current, ICCO -- mA 200 10 8 150 6 100 4 50 2 0 0 4 6 8 10 12 14 16 18 20 Supply voltage, VCC -- V 50 PO -- VCC Supply voltage, VCC -- V 25 PO -- f 40 f = 1kHz RL = 4 THD = 10% 20 Output power, PO -- W Output power, PO -- W 8 9 10 11 12 13 14 15 16 17 18 30 15 20 10 10 5 0 0 10 VCC = 14.4V RL = 4 THD = 1% 23 5 7 100 23 5 7 1k 23 5 7 10k 23 57 100k Supply voltage, VCC -- V 10 7 5 3 2 1.0 7 5 3 2 0.1 7 5 3 2 0.01 0.1 2 3 5 7 1.0 2 3 Frequency, f -- Hz 10 7 5 3 2 1.0 7 5 3 2 0.1 7 5 3 2 0.01 0.1 THD -- PO THD -- PO VCC = 14.4V RL = 4 f = 100Hz Total harmonic distortion, THD -- % CH4 CH2 CH3 CH1 5 7 10 2 3 5 7 100 Total harmonic distortion, THD -- % VCC = 14.4V RL = 4 f = 1kHz CH4 CH2 CH3 CH1 2 3 5 7 1.0 2 3 5 7 10 2 3 5 7 100 Output power, PO -- W 10 7 5 3 2 1.0 7 5 3 2 0.1 7 5 3 2 0.01 0.1 2 3 5 7 1.0 2 3 5 7 10 2 3 5 7 100 THD -- PO Output power, PO -- W 1.0 7 5 3 2 0.1 7 5 3 2 0.01 7 5 3 2 0.001 100 2 3 5 7 1k 2 3 5 7 10k 2 3 5 7 100k THD -- f Total harmonic distortion, THD -- % Total harmonic distortion, THD -- % VCC = 14.4V RL = 4 f = 10kHz VCC = 14.4V RL = 4 PO = 4W CH4 CH2 CH1 CH3 CH2 CH1 CH3 CH4 Output power, PO -- W Frequency, f -- Hz No.A0508-6/8 LA47202P 1 Response -- f Output noise voltage, VNO -- mVrms VCC = 14.4V RL = 4 VO = 0dBm 150 VNO -- Rg VCC = 14.4V RL = 4 0 Response -- dB 100 --1 50 --2 --3 10 23 5 7 100 23 5 7 1k 23 5 7 10k 23 57 100k 0 10 23 5 7 100 23 5 7 1k 23 5 7 10k 23 57 100k Frequency, f -- Hz 80 Rg -- V 80 CH. Separation -- f CH. Separation -- f 70 70 Channel separation -- dB 60 CH 3 Channel separation -- dB CH 1 CH 60 1 4 2 3 CH 2 4 50 50 CH 2 1 CH 1 2 40 40 30 20 10 VCC = 14.4V RL = 4 Rg = 10k VO = 0dBm (CH1) 23 5 7 100 23 5 7 1k 23 5 7 10k 23 57 100k 30 20 10 VCC = 14.4V RL = 4 Rg = 10k VO = 0dBm (CH2) 23 5 7 100 23 5 7 1k 23 5 7 10k 23 57 100k Frequency, f -- Hz 80 Frequency, f -- Hz 80 CH. Separation -- f CH. Separation -- f 70 70 Channel separation -- dB Channel separation -- dB CH 60 CH 60 3 2 CH 4 4 3 CH 1 50 3 CH 3 2 50 CH 4 2 4 40 40 30 20 10 VCC = 14.4V RL = 4 Rg = 10k VO = 0dBm (CH3) 23 5 7 100 23 5 7 1k 23 5 7 10k 23 57 100k 30 20 10 VCC = 14.4V RL = 4 Rg = 10k VO = 0dBm (CH4) 23 5 7 100 23 5 7 1k 23 5 7 10k 23 5 7100k Frequency, f -- Hz 80 Frequency, f -- Hz 80 SVRR -- VCC Ripple rejection ratio, SVRR -- dB SVRR -- fR CH2 Ripple rejection ratio, SVRR -- dB 70 70 CH 60 50 40 10 23 4 CH3 CH1 VCC = 14.4V VCCR = 0dBm Rg = 0 RL = 4 CVCC = 0.1F 5 7 100 23 5 7 1k 23 5 7 10k 23 5 7100k 60 50 40 8 VCCR = 0dBm fR = 100Hz Rg = 0 RL = 4 CVCC = 0.1F 10 12 14 16 18 Supply voltage, VCC -- V Ripple frequency, fR -- Hz No.A0508-7/8 LA47202P 80 SVRR -- VCCR CH2 CH1 CH4 60 Pd -- PO f = 1kHz RL = 4 VCC = 16V Ripple rejection ratio, SVRR -- dB 50 70 CH3 60 Power dissipation, Pd -- W 40 30 VCC = 14.4V 20 50 40 0 VCC = 14.4V fR = 100Hz Rg = 0 RL = 4 CVCC = 0.1F 0.5 10 SVRR = 20log (VCCR / VO) 1.0 1.5 2.0 0 0.1 Pd = VCCxICC-4PO 2 3 5 7 1.0 2 3 5 7 10 2 3 5 7 100 Supply ripple voltage, VCCR -- Vrms 10 Offset DIAG -- VCC Output power, PO -- W RL = 4 Rg = 0 8 Offset DIAG -- V 6 1/2 VCC 4 2 Detection Level 0 8 10 12 14 16 18 Supply voltage, VCC -- V Specifications of any and all SANYO Semiconductor 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 Semiconductor 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 Semiconductor 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 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 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 Semiconductor 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 December, 2006. Specifications and information herein are subject to change without notice. PS No.A0508-8/8 |
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