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Ordering number:ENN4610A
Thick Film Hybrid IC
STK42112
2ch AF Power Amplifier (Split Power Supply) (70W + 70W min, THD = 0.4%)
Features
* Muting circuit built-in to isolate all types of shock noise * Current mirror circuit for low 0.4% total harmonic distortion * Pin compatible with the STK4201V series (THD=0.08%) and the STK4141X series (THD=0.02%)
Package Dimensions
unit:mm 4086A
[STK42112]
78.0 70.0 9.0
3.6
21.5
44.0
1 2.54 (8.33) 21x2.54=53.34 0.5
22
26.5
4.0
2.9 0.4 5.5
Specifications
Maximum Ratings at Ta = 25C
Parameter Maximum supply voltage Thermal resistance Junction temperature Operating substrate temperature Storage temperature Available time for load short-circuit Symbol VCC max j-c Tj Tc Tstg ts VCC=42V, RL=8, f=50Hz, PO=70W Conditions
SANYO : SIP22
Ratings 60 1.5 150 125 -30 to +125 1
Unit V
C/W C C C
s
Recommended Operating Conditions at Ta = 25C
Parameter Recommended supply voltage Load resistance Symbol VCC RL Conditions Ratings 42 8 Unit V
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
O2099TH (KT)/71095HA (ID) No.4610-1/7
STK42112
Operating Characteristics at Ta = 25C, VCC=42V, RL=8 (non-inductive load), Rg=600, VG=40dB
Parameter Quiescent current Output power Total harmonic distortion Frequency response Input impedance Output noise voltage Neutral voltage Muting voltage Symbol ICCO PO THD fL, fH ri VNO VN VM VCC=50.5V THD=0.4%, f=20Hz to 20kHz PO=1.0W, f=1kHz PO=1.0W, +0 dB -3 PO=1.0W, f=1kHz VCC=50.5V, Rg=10k VCC=50.5V -70 -2 20 to 50k 55 0 -5 +70 -10 Conditions Ratings min 20 70 0.3 typ 40 max 100 Unit mA W % Hz k 1.2 mVrms mV V
Note. All tests are made using a constant-voltage supply unless otherwise specified. Available time for load short-circuit and output noise voltage are measured using the transformer supply specified below. The output noise voltage is the peak value of an average-reading meter with an rms value scale (VTVM). A regulated AC supply (50Hz) should be used to eliminate the effects of AC primary line flicker noise. Specified Transformer Supply (MG-200 or Equivalent)
Equivalent Circuit
No.4610-2/7
STK42112 Sample Application Circuit (70W min, 2-Channel, AF Power Amplifier)
Sample Application Circuit PCB Layout (Copper Foil Surface)
No.4610-3/7
STK42112 External Component Description
C3, C4 Input filter capacitors. These, together with R5 and R6, form filters to reduce high-band noise. Input coupling capacitors. For DC blocking. Since capacitor reactance becomes larger at lower frequencies, the output noise can be adversely affected by signal source resistance-dependent 1/f noise. In this case, a lower reactance value should be chosen. In order to remove pop noise at power-on, larger values of capacitance should be chosen for C5 and C6, which determin the input time constant, and smaller values for C9 and C10 in the NF circuit. NF capacitors. These determine the low-side cutoff frequency. C9, C10
fL= 1 [Hz] 2 x C9 x R7
C5, C6
A large values should be chosen for C9 to maintain voltage gain at low frequencies. However, because this would tend to increase the shock noise at power-on, a values larger than absolutely necessary should be avoided. C19 C15, C16 Decoupling capacitors. This removes shock noise and ripple voltage from the supply. Bootstrap capacitors. If these capacitors are made small, then the total harmonic distortion at low frequencies increases significantly. Oscillation prevention capacitors. These should be inserted as close as possible to the IC supply pins to reduce supply impedance and hence provide stable IC operation. Electolytic capacitors are recommended. Ripple filter capacitor. This forms a ripple filter in combinatin with internal transistor TR10. Oscillation prevention capacitors. Mylar capacitors are recommended for their excellent thermal and frequency characteristics. Input filter resistors. Input bias resistors. These are used to bias the input pins at zero potential. The input impedance is largely determined by this resistance. Voltage-gain VG setting resistors. VG=40dB is recommended using R7, R8=560, and R9, R10=56k. Gain adjustments are best made using R7 or R8. If gain adjustments are made using R7 or R8, then set R3, R4=R9, R10 to maintain VN balance stability. Bootstrap resistors. These resistors determine the quiescent current. Values of 4.7k and 4.7k are recommended. Ripple filter resistor. This resistor performs as predriver transistor limiting resistor during load short circuits. Clipping plus/minus balance resistor. Ripple filter resistors. When muting transistor TR11 is on, current flows from ground through TR11 to -VCC. Values of 1k (1W) and 1k (1W) are recommended. Oscillation prevention resistors. Output limiting resistors. High-frequency oscillation prevention resistors. High-frequency oscillation prevention inductors.
C17, C18
C20 C13, C14 R5, R6 R3, R4 R7, R9 (R8, R10) R11, R20 (R12, R21) R15 R14 R18, R19 R24, R25 R16, R17 R22, R23 L1, L2
No.4610-4/7
STK42112 Sample Application Circuit (With Protection and Muting Circuit)
No.4610-5/7
STK42112
No.4610-6/7
STK42112
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 expor ted without obtaining the expor t 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 October, 1999. Specifications and information herein are subject to change without notice.
PS No.4610-7/7

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