Ordering number : EN4822A Thick Film Hybrid IC STK400-290 AF Power Amplifier (Split Power Supply) (50 W + 50 W + 50W min, THD = 0.08%) Overview Package Dimensions 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 ICs, 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 6/3Ω drive in order to support the low impedance of modern speakers. unit: mm 4086A [STK400-290] Features • Pin-compatible STK400-000 series (3-channel, single package) ➙ STK401-000 series (2-channel, single package) • Output load impedance RL=6Ω/3Ω supported • New pin assignment 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 bootstrap 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)/83194TH (OT) 5-3392 No. 4822-1/10 STK400-290 Specifications Absolute Maximum Ratings at Ta = 25°C Parameter Symbol Maximum supply voltage Conditions Ratings VCC max θj-c Thermal resistance Per power transistor Unit ±47 V 1.7 °C/W Junction temperature Tj 150 °C Substrate temperature Tc 125 °C –30 to +125 °C Storage temperature Tstg Available time for load short-circuit ts VCC = ±32 V, RL = 6 Ω, f = 50 Hz, PO = 50 W 1 s Operating Characteristics at Ta = 25°C, RL = 6 Ω, Rg = 600 Ω, VG = 40 dB, RL (non-inductive) Ratings Parameter Quiescent current Symbol ICCO Frequency response Input impedance min typ max 30 90 PO (1) VCC =±32 V, f = 20 to 20 kHz, THD = 0.08% 50 55 W PO (2) VCC =±26 V, f = 1 kHz, THD = 0.2%, RL = 3 Ω 50 55 W THD (1) VCC =±32 V, f = 20 to 20 kHz, PO = 1.0 W THD (2) VCC =±32 V, f = 1 kHz, PO = 5.0 W fL, fH ri VCC =±32 V, PO = 1.0 W, 0.08 0 dB –3 VCC =±32 V, f = 1 kHz, PO = 1.0 W Output noise voltage VNO VCC =±39 V, Rg = 10 kΩ Neutral voltage VN VCC = ±39 V 150 Unit VCC = ±39 V Output power Total harmonic distortion Conditions % 0.007 % 20 to 50 k Hz 55 –70 mA 0 kΩ 1.2 mVrms +70 mV Notes • Use rated power supply for testing 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. No. 4822-2/10 STK400-290 Internal Equivalent Circuit Pattern Example for PCB used with either 2- or 3-channel Amplifiers. No. 4822-3/10 STK400-290 Sample Application Circuit 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. C2, 12, 22 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 cutoff frequency and is calculated according to the following equation. 1 C3, 13, 23 fL = 2π × C3 (13, 23) × R3 (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 For oscillation prevention capacitor. A Mylar capacitor with temperature and frequency features is recommended. C6, 7 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. C8, 9, 28, 29 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. R1, 11, 21 For input filter applied resistor. R2, 12, 22 For input bias resistor. The input pin is biased to zero potential. Input impedance is mostly decided with this resistance value. R3, 13, 23 R4, 14, 24 For resistors to determine voltage gain (VG). We recommend a VG = 40 dB using R3, R13, R23 = 560 Ω and R4, R14 and R24 = 56 Ω. 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. R5, 15, 25 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. R6, 16, 26 P R6 (16, 26) = V max/√2 CC ( 1/2π fC5 (15, ) 2 × R6 (16, 26) 25) + 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. L1, 2, 3 For oscillation prevention coil. Compensates phase dislocation caused by load capacitors and ensures stable oscillation. No. 4822-4/10 STK400-290 Series Configuration STK400-000, STK400-200 series (3 ch simultaneous) Type No. THD (%) Type No. THD (%) STK401-000, STK401-200 series (2 ch) Fixed standard output Type No. THD (%) Type No. THD (%) Supply voltage (V) Fixed standard output VCC max1 VCC max2 VCC1 VCC2 STK400-010 STK400-210 10 W × 3 STK401-010 STK401-210 10 W × 2 — ±26.0 ±17.5 ±14.0 STK400-020 STK400-220 15 W × 3 STK401-020 STK401-220 15 W × 2 — ±29.0 ±20.0 ±16.0 STK400-030 STK400-230 20 W × 3 STK401-030 STK401-230 20 W × 2 — ±34.0 ±23.0 ±19.0 STK400-040 STK400-240 25 W × 3 STK401-040 STK401-240 25 W × 2 — ±36.0 ±25.0 ±21.0 STK400-050 STK400-250 30 W × 3 STK401-050 STK401-250 30 W × 2 — ±39.0 ±26.0 ±22.0 STK400-060 STK400-260 35 W × 3 STK401-060 STK401-260 35 W × 2 — ±41.0 ±28.0 ±23.0 STK400-070 STK400-270 40 W × 3 STK401-070 STK401-270 40 W × 2 — ±44.0 ±30.0 ±24.0 45 W × 3 STK401-080 45 W × 2 — ±45.0 ±31.0 ±25.0 STK400-080 0.4 STK400-280 0.08 0.4 STK401-280 0.08 STK400-090 STK400-290 50 W × 3 STK401-090 STK401-290 50 W × 2 — ±47.0 ±32.0 ±26.0 STK400-100 STK400-300 60 W × 3 STK401-100 STK401-300 60 W × 2 — ±51.0 ±35.0 ±27.0 STK400-110 STK400-310 70 W × 3 STK401-110 STK401-310 70 W × 2 ±56.0 — ±38.0 — STK401-120 STK401-320 80 W × 2 ±61.0 — ±42.0 — STK401-130 STK401-330 100 W × 2 ±65.0 — ±45.0 — STK401-140 STK401-340 120 W × 2 ±74.0 — ±51.0 — STK400-400, STK400-600 series (3 ch non-simultaneous) Type No. THD (%) STK400-450 STK400-660 STK400-470 STK400-670 STK400-480 STK400-500 STK400-680 0.4 STK400-690 STK400-700 STK400-510 STK400-710 STK400-520 STK400-720 STK400-530 STK400-730 VCC max1 VCC max2 VCC1 VCC2 Fixed standard output THD (%) STK400-650 STK400-460 STK400-490 Type No. 0.08 Supply voltage (V) VCC max1 VCC max2 VCC1 VCC2 C ch 30 W — ±39.0 ±26.0 ±22.0 L, R ch 15 W — ±29.0 ±20.0 ±16.0 C ch 35 W — ±41.0 ±28.0 ±23.0 L, R ch 15 W — ±29.0 ±20.0 ±16.0 C ch 40 W — ±44.0 ±30.0 ±24.0 L, R ch 20 W — ±34.0 ±23.0 ±19.0 C ch 45 W — ±45.0 ±31.0 ±25.0 L, R ch 20 W — ±34.0 ±23.0 ±19.0 C ch 50 W — ±47.0 ±32.0 ±26.0 L, R ch 25 W — ±36.0 ±25.0 ±21.0 C ch 60 W — ±51.0 ±35.0 ±27.0 L, R ch 30 W — ±39.0 ±26.0 ±22.0 C ch 70 W ±56.0 — ±38.0 — L, R ch 35 W — ±41.0 ±28.0 ±23.0 C ch 80 W ±61.0 — ±42.0 — L, R ch 40 W — ±44.0 ±30.0 ±24.0 ±65.0 — ±45.0 — — ±47.0 ±32.0 ±26.0 C ch 100 W L, R ch 50 W RL = 6 Ω RL = 3 Ω to 6 Ω operation RL = 6 Ω operation RL = 3 Ω operation No. 4822-5/10 STK400-290 Example of Set Design for Common PCB No. 4822-6/10 STK400-290 External Circuit Diagram Heat Radiation Design Considerations The radiator thermal resistance θc-a required for total substrate power dissipation Pd in the STK400-290 is determined as: Condition 1: IC substrate temperature Tc not to exceed 125°C. Pd × θc-a + Ta < 125°C ···························· (1) where Ta is the assured ambient temperature. Condition 2: Power transistor junction temperature Tj not to exceed 150°C. Pd × θc-a + Pd/N × θj-c + Ta < 150°C ······(2) where N is the number of power transistors and θj-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 θc-a to yield: θc-a < (125–Ta)/Pd ····································(1)' θc-a < (150–Ta)/Pd–θj-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 STK400-290 VCC is ±32 V and RL is 6 Ω, for a continuous sine wave signal, is a maximum of 105 W (Figure. 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 = 66.5 W (1/10 PO max=during 5 W) No. 4822-7/10 STK400-290 The STK400-290 has six power transistors, so the thermal resistance per transistor θj-c is 1.7°C / W. With an assured ambient temperature Ta of 50°C, the required radiator thermal resistance θc-a would be: From expression (1)' θc-a < (125–50)/66.5 < 1.12 From expression (2)' θc-a < (150–50)/66.5 – 1.7/6 < 1.22 To satisfy both, 1.12°C/W is the required radiator thermal resistance. Figure 2 illustrates Pd - PO when the VCC of STK400-290 is ±26 V and RL is functioning at 3 Ω. Pd = 76 W (1/10 PO max = during 5 W) From expression (1)' θc-a < (125–50)/76 < 0.98 From expression (2)' θc-a < (150-50)/76-1.7/6 < 1.03 To satisfy both, 0.98°C / 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. 4822-8/10 STK400-290 No. 4822-9/10 STK400-290 ■ 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. ■ Anyone purchasing any products described or contained herein for an above-mentioned use shall: ➀ 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: ➁ 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. ■ 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. 4822-10/10