Ordering number : EN4830A Thick Film Hybrid IC STK400-020 3-Channel AF Power Amplifier (Split Power Supply) (15 W + 15 W +15 W min, THD = 0.4 %) 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 IC, even changes from 3-channel amplifier to 2-channel amplifiers are possible using the same PCB. In addition, this new series of ICs has a 6/3 Ω drive in order to support the low impedance of modern speakers. unit : mm 4086A [STK400-020] Features • Pin-compatible STK400-000 series (3-channel, single package) ➙ STK401-000 series (2-channel, single package) • Output load impedance RL=6 Ω/3 Ω 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. Specifications Maximum Ratings at Ta = 25°C Parameter Maximum supply voltage Thermal resistance Symbol Conditions Ratings VCC max θj-c Per power transistor Unit ±29 V 2.1 °C/W Junction temperature Tj 150 °C Operating substrate temperature Tc 125 °C –30 to +125 °C Storage temperature range Tstg Permissible load short time ts VCC = ±20 V, RL = 6 Ω, f = 50 Hz, PO = 15 W 1 s SANYO Electric Co.,Ltd. Semiconductor Bussiness Headquarters TOKYO OFFICE Tokyo Bldg., 1-10, 1 Chome, Ueno, Taito-ku, TOKYO, 110 JAPAN N3096 HA (OT)/D2894 TH(OT) No. 4830-1/10 STK400-020 Operating Characteristics at Ta = 25°C, RL = 6 Ω, Rg = 600 Ω, VG = 40 dB, RL (noninductive) Parameter Symbol Quiescent current Output power Total harmonic distortion ICCO Conditions min typ VCC =± 24 V 30 90 PO (1) VCC = ±20 V, f = 20 Hz to 20 kHz, THD = 0.4% 15 20 PO (2) VCC = ±16 V, f = 1 kHz, THD = 1.0%, RL = 3 Ω 15 20 THD (1) VCC = ±20 V, f = 20 Hz to 20 kHz, PO = 1.0 W THD (2) VCC = ±20 V, f = 1 kHz, PO = 5.0 W Frequency response Input impedance fL, fH ri VCC = ±20 V, f = 1 kHz, PO = 1.0 W VNO VCC = ±24 V, Rg = 10 kΩ Neutral voltage VN VCC = ±24 V Unit mA W W 0.4 +0 VCC = ±20 V, PO = 1.0 W, –3 dB Output noise voltage max 150 % 20 to 50 k Hz 55 –70 % 0.02 0 kΩ 1.2 mVrms +70 mV Notes • Use rated power supply for testing unless otherwise specified. • When measuring permissible load short time 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. Internal Equivalent Circuit No. 4830-2/10 STK400-020 Pattern Example for PCB Used with Either 2- or 3-Channel Amplifiers Sample Application Circuit No. 4830-3/10 STK400-020 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. C3, 13, 23 For NF capacitor. This capacitor determines the decline of the cutoff frequency and is calculated according to the following equation. fL = 1 2π X C3 (13, 23,) X 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 = 560Ω and R4, R14 and R24 = 56Ω. 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. R6, 16, 26 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) = × R6 (16, 26) 1/2π fC5 (15, 25) + R6 (16, 26) ( ) f = output signal frequency upper limit R8, 9, 28, 29 L1, 2, 3 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 and ensures stable oscillation. No. 4830-4/10 STK400-020 Series Configuration STK400-000, STK400-200 series (3-channel identical output) IC name THD (%) IC name THD (%) STK401-000, STK401-200 series (2-channel) Fixed standard output THD (%) IC name IC name THD (%) Fixed standard output Supply voltage (V) 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 STK400-080 0.4 STK400-270 STK400-280 0.08 40 W × 3 STK401-070 45 W × 3 STK401-080 0.4 STK401-270 STK401-280 0.08 40 W × 2 — ±44.0 ±30.0 ±24.0 45 W × 2 — ±45.0 ±31.0 ±25.0 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-channel differing output) IC name THD (%) IC name STK400-450 STK400-650 STK400-460 STK400-660 STK400-470 STK400-670 STK400-480 STK400-680 STK400-490 0.4 STK400-690 STK400-500 STK400-700 STK400-510 STK400-710 STK400-520 STK400-720 STK400-530 STK400-730 VCC max1 VCC max2 VCC1 VCC2 Fixed standard output THD (%) 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 C ch 100 W L, R ch 50 W ±65.0 — ±45.0 — — ±47.0 ±32.0 ±26.0 RL = 6 Ω RL = 6 Ω to 3 Ω operation RL = 6 Ω operation RL = 3 Ω operation No. 4830-5/10 STK400-020 Example of Set Design for Common PCB No. 4830-6/10 STK400-020 External Circuit Diagram Heat Radiation Design Considerations The radiator thermal resistance θc-a required for total substrate power dissipation Pd in the STK400-020 is determined as follows: Condition 1: IC substrate temperature Tc not to exceed 125°C. Pd x θc-a+Ta <125°C ······························· (1) where Ta is set assured ambient temperature. Condition 2: Power transistor junction temperature Tj not to exceed 150°C. Pd x θc-a+Pd/N x 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 dissipation 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 dissipation when STK400-020 VCC is ±20 V and RL is 6 Ω, for a continuous sine wave signal, is a maximum of 41 W (Fig. 1). In general, when this sort of continuous signal is used for estimation of power dissipation, the Pd used is 1/10th of PO max (slight variation depending on safety standard). Pd=23.5 W (1/10 PO max=during 1.5 W) No. 4830-7/10 STK400-020 The STK400-020 has six power transistors, so the thermal resistance per transistor θj-c is 2.1°C / W. With an assured ambient temperature Ta of 50°C, the required radiator thermal resistance θc-a would be as follows: From expression (1)' θc-a < (125–50)/23.5 < 3.19 From expression (2)' θc-a < (150–50)/23.5 – 2.1/6 < 5.84 To satisfy both, 3.19°C/W is the required radiator thermal resistance. Figure 2 illustrates Pd - PO when the VCC of STK400-020 is ±16 V and RL is functioning at 3 Ω. Pd = 26.5 W (1/10 PO max = during 1.5 W) From expression (1)' θc-a < (125–50) – 26.5 < 2.83 From expression (2)' θc-a < (150-50)/26.5 – 2.1/6 < 3.42 To satisfy both, 2.83°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. 4830-8/10 STK400-020 No. 4830-9/10 STK400-020 ■ 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 August, 1997. Specifications and information herein are subject to change without notice. No. 4830-10/10