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| 型號(hào)： | LA6543 |
| 元件分類： | 消費(fèi)家電 |
| 英文描述： | SPECIALTY CONSUMER CIRCUIT, PQFP34 |
| 封裝： | HEAT SINK, QFP-34 |
| 文件頁(yè)數(shù)： | 7/7頁(yè) |
| 文件大小： | 77K |
| 代理商： | LA6543 |
LA6543
No. 5973-7/7
This catalog provides information as of December, 1998. Specifications and information herein are subject to change
without notice.
A simplified diagram of VIN and VG is shown below.
1) Consider an 11 k
(typ.) resistor inserted between V
IN and VG.
2) When not the pin VG but the pin VIN is used alone, the BTL gain (between VO
+ and VO
–) is set to 7 dB for CH1 to CH3 (1 dB
for AMP only). For CH4, it is 14 dB (8 dB for AMP only). This also applies for the case when VIN is not used and an 11 k
external resistor is connected to VG for input.
3) Gain is set by the input impedance as seen from point A.
When VG only is used and the external resistor is R, the BTL gain (between VO
+ and V
O
– ) is
20 log (11 k
/R) + 14 dB.
When an 11 k
resistor is inserted between V
IN and VG, and input is via VIN, the combined resistance Rz as seen from point A is
Rz = 5.5 k
. Gain is
CH1 to CH3 : 20 log (11 k
/5.5 k) + 7 dB = 13 dB
CH4
: 20 log (11 k
/5.5 k) + 14 dB = 20 dB.
Gain Setting (input pins and adjustment pins)
This IC incorporates a level shifter circuit. The input references the voltage VREF to be applied and references the voltage
(VSS1)/2V for channels 1 to 3 or the voltage (VSS2–VBE (0.7))/2V for channel 4 to be output.
Offset Voltage
PS
–
+
–
+
AMP1
AMP2
–
+
VREF2
–
+
VREF1
CH4 only
Level
shift
VSS
VREF
VIN
VG
A
11 k
11 k
11 k
GND
VO–
VO+
A11150
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.
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