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Ordering number : EN4340A
Thick Film Hybrid IC
STK400-050
AF Power Amplifier (Split Power Supply) (30 W + 30 W + 30 W min, THD = 0.4%)
Overview
Now, thick-film audio power amplifier ICs are available with pin-compatibility to permit a single PCB to be designed and amplifier output capacity changed simply by installing a hybrid IC. This new series was developed with this kind of pin-compatibility to ensure integration between systems everywhere. With this new series of IC, even changes from 3-channel amplifier to 2-channel amplifiers is possible using the same PCB. In addition, this new series of ICs has a 6/3 drive in order to support the low impedance of modern speakers.
Package Dimensions
unit: mm 4086A
[STK400-050]
Features
* Pin-compatible STK400-000 series (3-channel, single package) STK401-000 series (2-channel, single package) * Output load impedance RL=6/3 supported * New pin arrangement To simplify input/output pattern layout and minimize the effects of pattern layout on operational characteristics, pin assignments are grouped into blocks consisting of input, output and power systems. * Few external circuits Compared to those series used until now, capacitors and boot-strap resistors for external circuits can be greatly reduced.
SANYO Electric Co.,Ltd. Semiconductor Bussiness Headquarters
TOKYO OFFICE Tokyo Bldg., 1-10, 1 Chome, Ueno, Taito-ku, TOKYO, 110 JAPAN
D3096HA(OT)/12093YO No. 4340-1/9
STK400-050
Specifications
Maximum Ratings at Ta = 25C
Parameter Maximum supply voltage Thermal resistance Junction temperature Operating substrate temperature Storage temperature range Available time for load short-circuit Symbol VCC max j-c Tj Tc Tstg ts VCC = 26 V, RL = 6 , f = 50 Hz, PO = 30 W Per power transistor Conditions Ratings 39 1.8 150 125 -30 to +125 1 Unit V C/W C C C s
Operating Characteristics at Ta = 25C, RL = 6, Rg = 600, VG = 40dB, RL (non-inductive)
Parameter Quiescent current Output power Symbol ICCO PO (1) PO (2) Total harmonic distortion THD (1) THD (2) Frequency response Input impedance Output noise voltage Neutral voltage fL, f H ri VNO VN VCC = 31 V VCC = 26 V, f = 20 Hz to 20 kHz, THD = 0.4% VCC = 22 V, f = 1 kHz, THD = 1.0%, RL = 3 VCC = 26 V, f = 20 Hz to 20 kHz, PO = 1.0 W VCC = 26 V, f = 1 kHz, PO = 5.0 W +0 VCC = 26 V, PO = 1.0 W, -3 dB VCC = 26 V, f = 1 kHz, PO = 1.0 W VCC = 31 V, Rg = 10 k VCC = 31 V -70 0 0.01 20 to 50 k 55 1.2 +70 Conditions Ratings min 30 30 30 typ 90 35 35 0.4 max 150 Unit mA W W % % Hz k mVrms mV
Notes * Use rated power supply for test unless otherwise specified. * When measuring available time for load short-circuit and output noise voltage use transformer power supply indicated below. * Output noise voltage is represented by the peak value rms (VTVM) for mean reading. Use an AC stabilized power supply (50 Hz) on the primary side to eliminate the effect of AC flicker noise. Specified Transformer Power Supply (RP-25 Equivalent)
Internal Equivalent Circuit
No. 4340-2/9
STK400-050 Pattern Example for PCB used with either 2- or 3-channel Amplifiers.
In the STK401-000 series, pin No. 6 corresponds to pin No. 1.
Sample Application Circuit
No. 4340-3/9
STK400-050 Description of External Circuits
C1, 11, 21 For input coupling capacitor. Used for current blocking. When capacitor reactance with low frequency is increased, the reactance value should be reduced in order to reduce the output noise from the signal resistance dependent 1/f noise. In response to the popping noise which occurs when the system power is turned on, C1 and C11 which determine the decay time constant on the input side are increased while C3, C13 and C23 on the NF side are decreased. For input filter capacitor. Permits high-region noise reduction by utilizing filter constructed with R1, R11 and R21. For NF capacitor. This capacitor determines the decline of the cut-off frequency and is calculated according to the following equation. fL = 1 2 X C3 (13, 23,) X R3 (13, 23)
C2, 12, 22 C3, 13, 23
For the purpose of achieving voltage gains prior to reduction, it is best that C3, C13 and C23 are large. However, because the shock noise which occurs when the system power is turned on tends to increase, values larger than those absolutely necessary should be avoided. C5, 15, 25 C6, 7 For oscillation prevention capacitor. A Mylar capacitor with temperature and frequency features is recommended. For oscillation prevention capacitor. To ensure safe IC functioning, the capacitor should be installed as close as possible to the IC power pin to reduce power impedance. An electrolytic capacitor is good. For decoupling capacitor. Reduces shock noise during power up using decay time constant circuits with R8, R9, R28 and R29 and eliminates components such as ripples crossing over into the input side from the power line. For input filter applied resistor. For input bias resistor. The input pin is biased to zero potential. Input impedance is mostly decided with this resistance value. For resistors to determine voltage gain (VG). We recommend a VG = 40 dB using R3, R13, R23 = 560 and R4, R14 and R24 = 56. VG adjustments are best performed using R3, R13 and R23. When using R4, R14 and R24 for such purposes, R4, R14 and R24 should be set to equal R2, R12 and R22 in order to establish a stable VN balance. For oscillation prevention resistor. For oscillation prevention resistor. This resistor's electrical output resides in the signal frequency and is calculated according to the following formula. VCC max/2 2 P R6 (16, 26) = ( 1/2 fC5 (15, 25) + R6 (16, 26) ) X R6 (16, 26) f = output signal frequency upper limit R8, 9, 28, 29 For ripple filter applied resistor. PO max, ripple rejection and power-up shock noise are modified according to this value. Set the electrical output of these resistors while keeping in mind the flow of peak current during recharging to C8, C9, C28 and C29 which function as pre-drive TR control resistors during load shorts. For oscillation prevention coil. Compensates phase dislocation caused by load capacitors
C8, 9, 28, 29
R1, 11, 21 R2, 12, 22 R3, 13, 23 R4, 14, 24
R5, 15, 25 R6, 16, 26
L1, 2, 3
and ensures stable oscillation.
No. 4340-4/9
STK400-050 Series Configuration
3ch Amp IC Name STK400-010 STK400-020 STK400-030 STK400-040 STK400-050 STK400-060 STK400-070 STK400-080 STK400-090 STK400-100 STK400-110 -- -- --
Fixed Standard Output
2ch Amp IC Name STK401-010 STK401-020 STK401-030 STK401-040 STK401-050 STK401-060 STK401-070 STK401-080 STK401-090 STK401-100 STK401-110 STK401-120 STK401-130 STK401-140
Fixed Standard Output
THD [%] f = 20 to 20kHz
Supply voltage VCC max1 -- -- -- -- -- -- VCC max2 27 29 34 36 39 41 44 45 47 51 -- -- -- -- VCC1 18 20 23 25 26 28 30 31 32 35 38 42 45 51 VCC2 14 16 19 21 22 23 24 25 26 27 -- -- -- --
10W X 3 15W X 3 20W X 3 25W X 3 30W X 3 35W X 3 40W X 3 45W X 3 50W X 3 60W X 3 70W X 3 -- -- --
10W X 2 15W X 2 20W X 2 25W X 2 30W X 2 35W X 2 40W X 2 45W X 2 50W X 2 60W X 2 70W X 2 80W X 2 100W X 2 120W X 2 0.4
-- -- -- -- 56.0 61.0 65.0 74.0 VCC max1 VCC max2 VCC1 VCC2
RL = 6 RL = 6 to 3 operation RL = 6 operation RL = 3 operation
Example of Set Design for Common PCB
No. 4340-5/9
STK400-050 External Circuit Diagram
Heat Radiation Design Considerations The radiator thermal resistance c-a required for total substrate power dissipation Pd in the STK400-050 is determined as: Condition 1: IC substrate temperature Tc not to exceed 125C. Pd x c-a+Ta <125C ******************************* (1) where Ta is set assured ambient temperature. Condition 2: Power transistor junction temperature Tj not to exceed 150C. Pd x c-a+Pd/N x j-c+Ta<150C*************(2) where N is the number of power transistors and j-c the thermal resistance per power transistor chip. However, power transistor power consumption is Pd equally divided by N units. Expressions (1) and (2) can be rewritten based on c-a to yield: c-a<(125-Ta)/Pd **************************************(1)' c-a<(150-Ta)/Pd-j-c/N**************************(2)' The required radiator thermal resistance will satisfy both of these expressions. From expressions (1)' and (2)', the required radiator thermal resistance can be determined once the following specifications are known: * * * Supply voltage VCC Load resistance RL Assured ambient temperature Ta
The total substrate power consumption when STK400-050 VCC is 26 V and RL is 6 , for a continuous sine wave signal, is a maximum of 70W (Fig. 1). In general, when this sort of continuous signal is used for estimation of power consumption, the Pd used is 1/10th of PO max (slight variation depending on safety standard). Pd=42.5W (1/10 PO max=during 3W)
No. 4340-6/9
STK400-050 The STK400-050 has six power transistors, so the thermal resistance per transistor j-c is 1.8C / W. With an assured ambient temperature Ta of 50C, the required radiator thermal resistance c-a would be: From expression (1)' c-a <(125-50)/42.5 <1.76 From expression (2)' c-a <(150-50)/42.5-1.8/6 <2.05 To satisfy both, 1.76C/W is the required radiator thermal resistance. Figure 2 illustrates Pd - PO when the VCC of STK400-050 is 19V and RL is functioning at 3. Pd = 51W (1/10 PO max = during 3W) From expression (1)' c-a <(125-50)-51 <1.47 From expression (2)' c-a <(150-50)/51-1.8/6 <1.66 To satisfy both, 1.47C / W is the required radiator thermal resistance. This design example is based on a fixed voltage supply, and will require verification within your specific set environment.
No. 4340-7/9
STK400-050
No. 4340-8/9
STK400-050
s No products described or contained herein are intended for use in surgical implants, life-support systems, aerospace equipment, nuclear power control systems, vehicles, disaster/crime-prevention equipment and the like, the failure of which may directly or indirectly cause injury, death or property loss. s Anyone purchasing any products described or contained herein for an above-mentioned use shall: Accept full responsibility and indemnify and defend SANYO ELECTRIC CO., LTD., its affiliates, subsidiaries and distributors and all their officers and employees, jointly and severally, against any and all claims and litigation and all damages, cost and expenses associated with such use: Not impose any responsibility for any fault or negligence which may be cited in any such claim or litigation on SANYO ELECTRIC CO., LTD., its affiliates, subsidiaries and distributors or any of their officers and employees jointly or severally. s 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, 1997. Specifications and information herein are subject to change without notice. No. 4340-9/9

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