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Ordering number: ENN6984
Monolithic Linear IC
LA4635B
For General Audio Use
2-Channel BTL AF Power Amplifier
Overview
The LA4635B is a 2-channel power IC that is pin-compatible with the LA4636. It represents a new concept in devices of this type by allowing design editing based on common circuit board pin compatibility for products of different power ranks. It is compatible with VCC = 9 V and VCC = 12 V specifications and is available in two versions with different voltage gains (LA4635B with VG = 45 dB and LA4635A with VG = 35 dB).
Package Dimensions
unit: mm 3049B-SIP12H
[LA4635B]
26.8 (20.0)
4.0
7.0
1.0min
1 (2.4) 2.0 0.5 1.0 12
6.0
13.2max
(8.4)
(R1.7)
(11.8)
0.4 2.0
Specifications
Maximum Ratings at Ta = 25C
Parameter Maximum supply voltage Maximum output current Allowable power dissipation Operating temperature Storage temperature Symbol VCC max Io peak Pd max Topr Tstg No signal Per channel Infinite heat sink Conditions
SANYO: SIP12H
Ratings 24 2.5 25 -20 to +75 -40 to +150
Unit V A W C C
Operating Conditions at Ta = 25C
Parameter Recommended supply voltage Recommended load resistance Allowable operating voltage range Symbol VCC RL op VCC op Conditions Ratings 12 3 to 8 5.5 to 22 Unit V V
* Set VCC, RL, and output level such that Pd max. is not exceeded for the size of heat sink used.
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
70102RM (II) No. 6984-1/3
LA4635B Operating Characteristics at Ta = 25C, VCC = 12 V, RL = 3 , f = 1 kHz, Rg = 600
Parameter Quiescent current Standby current Voltage gain Total harmonic distortion Output power Output noise voltage Ripple rejection Channel separation Input resistance Standby pin voltage Symbol ICCO Ist VG THD P O1 P O2 VNO SVRR CH Sep Ri VST Amplifier on (pin 5 voltage) VO = 0 dBm PO = 1 W THD = 10% VCC = 9 V, THD = 10% Rg = 0, BPF = 20 Hz to 20 kHz Rg = 0, fR = 100 Hz, VR = 0 dBm Rg = 10 k, VO = 0 dBm 45 45 20 1.5 3.0 2.0 43 Rg = 0 Conditions min 18 Ratings typ 35 1 45 0.25 4.5 2.5 0.15 55 55 30 5.0 40 0.5 max 80 10 47 0.8 Unit mA A dB % W W mV dB dB k V
Circuit Application Example
LA4635B
(Popping Noise Eliminator) STBY P.P VCC 5
Rx
(Ripple Filter) DC IN1 1 2
PRE GND 3
IN2 4
OUT2 8
NC 9
PWR GND 10
NC 11
OUT1 12 Top view
6
7
4.7F 16V
1F 50V
1F 50V
+
+
+
+
+
+
+
ILA00780
VCC
* If voltage is to be applied to the Standby pin (pin 5), a resistor (Rx) should be inserted to limit the inflow current, as required. Please refer to the information below.
1000F 16V
5V
1000F 25V
RL
(Reference) Pin 5 Equivalent Circuit Inside IC
Rx Standby Pin Voltage Vx + Ix=max 4.5mA Ix 5 R2 2k
STBY
ILA00781
30
Pd max -- Ta
Infinite heat sink
AI heat sink Mounting torque 39N*cm F l a t wa s h e r S i l i c o n e gr e a s e applied
Allowable power dissipation, Pd max - W
25
20
qjc=3C / W
15 12.5 10
100 100 1.5 mm3 50 50 1.5 mm3
* The amplifier can be turned on and off by controlling the level (high/low) of pin 5. * Applying a signal equal or greater than 1.5 V and 800 A to pin 5 turns on the amplifier. (If 5 V is applied directly to pin 5 the inflow current of pin 5 is approximately 4.5 mA.) * If a voltage, Vx, exceeding 5 V is to be applied, current limiting resistor (Rx) should be inserted to limit the inflow current to 4.5 mA. (See following equation.) Rx = (Vx - 5 V) / 4.5 mA * If pin 5 is to be controlled by the microprocessor, the pin 5 inflow current (Ix) should be optimized for the capacity of the microprocessor by calculating Rx using the following equation, as a general guideline, and then confirming the inflow current through actual measurement. Rx = (Vx / Ix) - R1 (2 k)
R1 2k
7 5 3.2
Single IC
0 20 40 60 80 100 120 140 160
0 --20
Ambient temperature, Ta - C
ILA00777
Note: The LA4635B is basically pin-compatible with the LA4636, but there are partial differences in operation and usage, including with regard to externally connected parts.
No. 6984-2/3
RL
1000F 16V
100F 16V
LA4635B
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 July, 2002. Specifications and information herein are subject to change without notice.
PS No. 6984-3/3

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