Ordering number : EN*A1502 Thick-Film Hybrid IC STK415-120-E 2-Channel Power Switching Audio Power IC, 80W+80W Overview The STK415-120-E is a class H audio power amplifier hybrid IC that features a built-in power supply switching circuit. This IC provides high efficiency audio power amplification by controlling (switching) the supply voltage supplied to the power devices according to the detected level of the input audio signal. Applications • Audio power amplifiers. Features • Pin-to-pin compatible outputs ranging from 80W to 180W. • Can be used to replace the STK416-100 series (3-channel models) and the class-AB series (2, 3-channel models) due to its pin compatibility. • Pure complementary construction by new Darlington power transistors • Output load impedance: RL = 8Ω to 4Ω supported • Using insulated metal substrate that features superlative heat dissipation characteristics that are among the highest in the industry. Series Models STK415-090-E STK415-100-E STK415-120-E STK415-130-E STK415-140-E Output 1 (10%/1kHz) 80W×2 channels 90W×2 channels 120W×2 channels 150W×2 channels 180W×2 channels Output 2 (0.8%/20Hz to 20kHz) 50W×2 channels 60W×2 channels 80W×2 channels 100W×2 channels 120W×2 channels Max. rated VH (quiescent) ±60V ±65V ±73V ±80V ±80V Max. rated VL (quiescent) ±41V ±42V ±45V ±46V ±51V Recommended operating VH (8Ω) ±37V ±39V ±46V ±51V ±52V Recommended operating VL (8Ω) ±27V ±29V ±32V ±34V ±32V Dimensions (excluding pin height) 64.0mm×31.1mm×9.0mm Any and all SANYO Semiconductor Co.,Ltd. products described or contained herein are, with regard to "standard application", intended for the use as general electronics equipment (home appliances, AV equipment, communication device, office equipment, industrial equipment etc.). The products mentioned herein shall not be intended for use for any "special application" (medical equipment whose purpose is to sustain life, aerospace instrument, nuclear control device, burning appliances, transportation machine, traffic signal system, safety equipment etc.) that shall require extremely high level of reliability and can directly threaten human lives in case of failure or malfunction of the product or may cause harm to human bodies, nor shall they grant any guarantee thereof. If you should intend to use our products for applications outside the standard applications of our customer who is considering such use and/or outside the scope of our intended standard applications, please consult with us prior to the intended use. If there is no consultation or inquiry before the intended use, our customer shall be solely responsible for the use. Specifications of any and all SANYO Semiconductor Co.,Ltd. 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. 70809HKIM No. A1502-1/12 STK415-120-E Specifications Absolute maximum ratings at Ta=25°C (excluding rated temperature items), Tc=25°C unless otherwise specified Parameter Symbol Conditions Ratings Unit VH maximum quiescent supply voltage 1 VH max (1) When no signal ±73 V VH maximum supply voltage 2 VH max (2) RL≥6Ω ±65 V VH maximum supply voltage 3 VH max (3) RL≥4Ω ±52 V VL maximum quiescent supply voltage 1 VL max (1) When no signal ±45 V VL maximum supply voltage 2 VL max (2) RL≥6Ω ±42 V VL maximum supply voltage 3 Maximum voltage between VH and VL *4 VL max (3) VH-VL max RL≥4Ω ±32 V 60 V Standby pin maximum voltage Vst max Thermal resistance θj-c Per power transistor 1.6 °C/W Junction temperature Tj max Both the Tj max and Tc max conditions must be met. 150 °C IC substrate operating temperature Tc max 125 °C Storage temperature Tstg -30 to +125 °C Allowable load shorted time *3 No loading -0.3 to +5.5 ts VH=±46V, VL=±32V, RL=8Ω, f=50Hz, 0.3 PO=80W, 1-channel active V s Electrical Characteristics at Tc=25°C, RL=8Ω (non-inductive load), Rg=600Ω, VG=40dB, VZ=15V Conditions *1 Parameter Symbol Output power Frequency characteristics Input impedance Output noise voltage Quiescent current standby ON ±36 THD VH ±46 VL ±32 VH VL ±46 VH VL ±46 VH VL ±54 VH ±54 VL ±35 VH VL ±54 VH VL ±46 VH VL ±46 fL, fH VNO VST ON *7 Pin 17 voltage when standby OFF VH VL VN Pin 17 voltage when VST OFF *7 (Hz) PO (2) ICCO Output neutral voltage (V) ±46 ri *2 f VH VL PO (1) Total harmonic distortion V ±32 ±26 ±35 Ratings unit THD min (%) 20 to 20k 0.8 1k 0.8 ±32 max 80 20 to 20k 80 80 1.0 1k RL=4Ω +0 -3dB 1.0 0.4 % 20 to 50k Hz 55 Rg=2.2kΩ 30 mVrms mA 100 -70 Standby Operating kΩ 1.0 RL=∞ ±35 ±32 typ W ±32 ±32 PO (W) 2.5 0 +70 mV 0 0.6 V 3.0 V [Remarks] *1: Unless otherwise specified, use a constant-voltage power supply to supply power when inspections are carried out. *2: The output noise voltage values shown are peak values read with a VTVM. However, an AC stabilized (50Hz) power supply should be used to minimize the influence of AC primary side flicker noise on the reading. *3: Use the designated transformer power supply circuit shown in the figure below for the measurements of allowable load shorted time and output noise voltage. *4: Design circuits so that (|VH|-|VL|) is always less than 40V when switching the power supply with the load connected. *5: Set up the VL power supply with an offset voltage at power supply switching (VL-VO) of about 8V as an initial target. *6: Please connect –Pre VCC pin (#5 pin) with the stable minimum voltage and connect so that current does not flow in by reverse bias. *7: Use the standby pin (pin 17) so that the applied voltage never exceeds the maximum rating. The power amplifier is turned on by applying +2.5V to +5.5V to the standby pin (pin 17). *8: Thermal design must be implemented based on the conditions under which the customer’s end products are expected to operate on the market. *9: A thermoplastic adhesive resin is used for this hybrid IC. No. A1502-2/12 STK415-120-E DBA40C DBA40C 10000μF +VH + 10000μF +VL + 500Ω 500Ω + + 500Ω 500Ω -VH -VL 10000μF 10000μF Designated transformer power supply (MG-200 equivalent) Designated transformer power supply (MG-250 equivalent) Package Dimensions unit:mm (typ) 64.0 55.6 9.0 1 2.0 (9.8) 25.8 19 0.4 4.0 3.6 31.1 21.0 5.0 (R1.8) 0.5 2.9 18 2.0=36.0 5.5 Internal Equivalent Circuit 7 12 Comparator Pre Driver CH2 Pre Driver CH1 3 15 1 16 2 4 Stand-by Comparator 5 6 SUB 14 13 9 8 10 11 17 18 19 No. A1502-3/12 STK415-120-E Application Circuit Example STK415-100 series +OFF -OFF OUT OUT OUT OUT IN NF ST NF +VL -VL SET SET -Pre -VH +VH Ch1+ Ch1- Ch2+ Ch2- +Pre SUB GND Ch1 Ch1 BY Ch2 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 C22 R24 R26 IN Ch2 19 R30 C23 Stand-by R19 R18 D03 D04 C08 C07 R14 R15 C13 C14 C17 R22 Ch2-IN R06 C20 R05 C19 GND +VH C01 R03 D01 Ch1-IN C16 R21 C05 +VL C03 R01 C04 R02 L02 GND -VL C02 D02 R12 C11 Ch2-OUT R09 C06 GND R04 L01 -VH R08 C10 Ch1-OUT R11 No. A1502-4/12 STK415-120-E Recommended Values for Application Parts (for the test circuit) Symbol R01, R02 Recommended Description Value 1.5kΩ Larger than Recommended Smaller than Value Recommended Value Determine the current flowing into the power switching Power holding circuit Power switching circuit circuit (comparator), (3mA to 10mA at VH power remains active at lower activates at higher switching) frequencies. frequencies. Ripple filtering resistors Decreased pass-through Increased pass-through (Used with C05 and C06 to form a ripple filter.) current at high frequencies. current at high frequencies. Input bias resistors VN offset (Virtually determine the input impedance.) (Ensure R05=R18, R06=R19 when changing.) R03, R04 100Ω/1W R05, R06 56kΩ R08, R09 4.7Ω/1W Oscillation prevention resistor - - R11, R12 4.7Ω Oscillation prevention resistor - - R14,R15 560Ω Used with R18 and R19 to determine the voltage gain Likely to oscillate VG. (VG should desirably be determined by the R14 (VG<40dB) None and R15 value.) R18, R19 56kΩ Used with R14 and R15 to determine the voltage gain - - - - VG. R21, R22 1kΩ R24, R26 0.22Ω±10%, 5W R30 Remarks *7 C01, C02 100μF/ 100V Input filtering resistor Output emitter resistors Decrease in maximum Likely to cause thermal- (Use of cement resistor is desirable) output power runaway. Use a limiting resistor according to the voltage applied to the standby pin so that it remains within the rating. Oscillation prevention capacitors. • Insert the capacitors as close to the IC as possible to decrease the power impedance for reliable IC - - - - operation (use of electrolytic capacitors are desirable). C03, C04 100μF/ 50V Oscillation prevention capacitors. • Insert the capacitors as close to the IC as possible to decrease the power impedance for reliable IC operation (use of electrolytic capacitors are desirable). C05, C06 100μF/ 100V Decoupling capacitors. Increase in ripple components that pass into the input side Eliminate ripple components that pass into the input from the power line. side from the power line. (Used with R03 and R04 to form a ripple filter.) C07, C08 3pF Oscillation prevention capacitor Likely to oscillate C10, C11 0.1μF Oscillation prevention capacitor Likely to oscillate C13, C14 22μF/ (Mylar capacitors are recommended.) 10V C16, C17 2.2μF/ NF capacitor Increase in low-frequency Decrease in low-frequency (Changes the low cutoff frequency; voltage gain, with higher voltage gain ex/fL=1/2π •C13•R14) pop noise at power-on. Input coupling capacitor (block DC current) 50V C19, C20 470pF - - - - Input filter capacitor (Used with R21 and R22 to form a filter that suppresses high-frequency noises.) C22, C23 100pF D01, D02 15V D03, D04 3A/60V Oscillation prevention capacitor Likely to oscillate. Determine the offset voltage at VL↔VH power. Decreased distortion at Increased distortion at power switching time power switching time. Reverse current prevention diodes - (FRD is recommended.) L01, L02 3μH Oscillation prevention inductance None Likely to oscillate. No. A1502-5/12 STK415-120-E Sample PCB Trace Pattern STK415-100-E-Sr/STK416-100-E-Sr PCB PARTS LIST Parts List STK415, 416-100Sr PCB Parts List STK415 (416) PCB No. PARTS RATING -090-E, -100-E, STK415-140-E -120-E, 130-E R01, R02 - ERX1SJ*** 1.5kΩ, 1W 1.5kΩ, 1W R03, R04 100Ω, 1W ERG1SJ101 enabled enabled 56kΩ, 1/6W RN16S563FK enabled enabled R05, R06, (R07), R18, R19, (R20) R08, R09, (R10) 4.7Ω, 1W ERX1SJ4R7 enabled enabled R11, R12, (R13) 4.7Ω, 1/4W RN14S4R7FK enabled enabled R14, R15, (R16) - RN16S***FK 560Ω, 1/6W 560Ω, 1/6W R21, R22, (R23) 1kΩ, 1/6W RN16S102FK enabled enabled R25, R27, (R29) 0.22Ω±10%, 5W BPR56CFR22J Short Short BPR56CFR22J enabled enabled R24, R26, (R28) 0.22Ω±10%, 5W R35, R36, R37 - - Short Short C01, C02, C05, C06 100μF, 100V 100MV100HC enabled enabled C03, C04 100μF, 50V 50MV100HC enabled enabled C07, C08, (C09) 3pF DD104-63B3ROK50 enabled enabled C10, C11, (C12) 0.1μF, 100V ECQ-V1H104JZ enabled enabled C13, C14, (C15) 22μF, 10V 10MV220HC enabled enabled C16, C17, (C18) 2.2μF, 50V 50MV2R2HC enabled enabled C19, C20, (C21) 470pF DD104-63B471K50 enabled enabled C22, C23, (C24) 100pF DD104-63B101K50 enabled enabled D01, D02 - - GZA15X (SANYO) GZA18X (SANYO) D03, D04 IF (AV)=3A/60V enabled enabled 3μH enabled enabled enabled enabled L01, L02, (L03) Stand-By R30 3.3kΩ, 1/6W RN16S332FK R32 1kΩ, 1/6W RN16S102FK enabled enabled R33 33kΩ, 1/6W RN16S333FK enabled enabled R34 2kΩ, 1/6W RN16S202FK enabled enabled C25 47μF, 10V 10MV47HC enabled enabled D05 - GMB01 (Ref.) enabled enabled TR1 - 2SC2274 (Ref.) enabled enabled J01 Jumper 20mm enabled enabled J02, J03, J06 Jumper 10mm enabled enabled J04, J05 Jumper 7mm enabled enabled (*1) STK416-100Sr (3ch AMP) doesn’t mount parts of ( ). No. A1502-6/12 STK415-120-E Pin Assignments [STK433-000/-100/-200 Sr & STK415/416-100 Sr Pin Layout] 1 2 3 4 5 2ch class-AB 6 7 8 9 10 11 12 13 14 15 I N S N I N F T F N 2ch classAB/2.00mm STK433-030-E 30W/JEITA - - + O O O O + STK433-040-E 40W/JEITA P V V U U U U P S G STK433-060-E 50W/JEITA R C C T T T T R U N / / A / / STK433-070-E 60W/JEITA E C C / / / / E B D C C N C C C C C C • H H D H H STK433-090-E 80W/JEITA H H H H G 1 1 | 2 2 STK433-100-E 100W/JEITA 1 1 2 2 N B STK433-120-E 120W/JEITA + - + - D Y 4 5 6 7 15 STK433-130-E 150W/JEITA 1 2 3 3ch class-AB 8 9 10 11 12 13 14 16 17 18 19 3ch classAB/2.00mm STK433-230A-E 30W/JEITA - - + O O O O + I N S N I I N O O STK433-240A-E 40W/JEITA P V V U U U U P S G N F T F N N F U U STK433-260A-E 50W/JEITA R C C T T T T R U N / / A / / / / T T STK433-270-E 60W/JEITA E C C / / / / E B D C C N C C C C / / STK433-290-E 80W/JEITA C C C C • H H D H H H H C C STK433-300-E 100W/JEITA H H H H G 1 1 | 2 2 3 3 H H STK433-320-E 120W/JEITA 1 1 2 2 N B 3 3 STK433-330-E 150W/JEITA + - + - D Y + - 11 1 2 3 4 5 6 7 8 9 10 STK415-090-E 80W/JEITA + - + - - - + O O O O + STK415-100-E 90W/JEITA V V O O P V V U U U U P S G STK415-120-E 120W/JEITA L L H H T T T T R U N / / A / / / / / / E B D C C N C C 2ch class-H 12 13 14 15 16 17 18 19 I N S N I N F T F N 2ch classH/2.00mm F F R STK415-130-E 150W/JEITA F F E STK415-140-E 180W/JEITA S S C C C C • H H D H H E E H H H H G 1 1 | 2 2 T T 1 1 2 2 N 19 B Y D + - + - 1 2 3 4 5 6 7 8 9 10 11 STK416-090-E 80W/JEITA + - + - - - + O O O O + STK416-100-E 90W/JEITA V V O O P V V U U U U P S G STK416-120-E 120W/JEITA L L F F R H H T T T T R U N F F E / / / / E B D S S C C C C E E H H H T T 1 1 2 + - + 3ch class-H STK416-130-E 150W/JEITA 12 13 14 15 16 17 18 20 21 22 23 I N S N N F T F I I N O O N N F U / / A / U / / / T C C N T C C C C / • H H / D H H H H C C H G 1 1 2 N B | 2 2 3 3 H H 3 - D Y 3 + - 3ch classH/2.00mm No. A1502-7/12 STK415-120-E Evaluation Board Characteristics 0.1 7 5 3 2 z 1kHz 0.01 7 5 3 2 2 3 5 7 10 2 3 5 7 100 2 3 Output power, PO/ch - W 200 150 100 50 0 0.1 2 3 5 7 1.0 150 200 100 2 3 5 7 10 2 3 5 7 100 2 3 Output power, PO/ch - W 250 VH=±46V VG=40dB Rg=600Ω f=1kHz Tc=25°C RL=8Ω 2ch Drive 200 150 5 71000 ITF02695 PO - VH VL=±32V VG=40dB Rg=600Ω f=1kHz Tc=25°C RL=8Ω 2ch Drive 100 .8% =0 % D .4 T H =0 D TH 50 50 0 10 20 30 40 50 Supply voltage, VL - ±V ITF02696 PO - f 250 0 20 30 40 50 Supply voltage, VH - ±V 60 70 ITF02697 VH=±46V VL=±32V VG=40dB Rg=600Ω Tc=25°C RL=8Ω 2ch Drive 200 Output power, PO/ch - W VH=±46V VL=±32V VG=40dB f=1kHz Rg=600Ω Tc=25°C RL=8Ω 2ch Drive ITF02694 P O - VL 250 Output power, PO/ch - W 5 7 1000 Output power, PO/ch - W 0.001 1.0 Pd - PO 250 =1 0% f=20k H VH=±46V VL=±32V VG=40dB Rg=600Ω Tc=25°C RL=8Ω 2ch Drive TH D Total harmonic distortion, THD - % 1.0 7 5 3 2 Total power dissipation within the board, Pd - W THD - PO 10 7 5 3 2 150 THD=10% THD=0.8% 100 50 0 10 2 3 5 7 100 2 3 5 7 1k 2 3 Frequency, f - Hz 5 7 10k 2 3 5 7100k ITF02698 No. A1502-8/12 STK415-120-E [Thermal Design Example for STK415-120-E (RL = 8Ω)] The thermal resistance, θc-a, of the heat sink for total power dissipation, Pd, within the hybrid IC is determined as follows. Condition 1: The hybrid IC substrate temperature, Tc, must not exceed 125°C. Pd × θc-a + Ta < 125°C ................................................................................................. (1) Ta: Guaranteed ambient temperature for the end product Condition 2: The junction temperature, Tj, of each power transistor must not exceed 150°C. Pd × θc-a + Pd/N × θj-c + Ta < 150°C .......................................................................... (2) N: Number of power transistors θj-c: Thermal resistance per power transistor However, the power dissipation, Pd, for the power transistors shall be allocated equally among the number of power transistors. The following inequalities result from solving equations (1) and (2) for θc-a. θc-a < (125 − Ta)/Pd ...................................................................................................... (1)' θc-a < (150 − Ta)/Pd − θj-c/N ........................................................................................ (2)' Values that satisfy these two inequalities at the same time represent the required heat sink thermal resistance. When the following specifications have been stipulated, the required heat sink thermal resistance can be determined from formulas (1)' and (2)'. • Supply voltage VH, VL • Load resistance RL • Guaranteed ambient temperature Ta [Example] When the IC supply voltage, VH=±46V, VL=±32V and RL is 8Ω, the total power dissipation, Pd, within the hybrid IC, will be a maximum of 77W at 1kHz for a continuous sine wave signal according to the Pd-PO characteristics. For the music signals normally handled by audio amplifiers, a value of 1/8PO max is generally used for Pd as an estimate of the power dissipation based on the type of continuous signal. (Note that the factor used may differ depending on the safety standard used.) This is: Pd ≈ 46.0W (when 1/8PO max. = 10W, PO max. = 80W). The number of power transistors in audio amplifier block of these hybrid ICs, N, is 4, and the thermal resistance per transistor, θj-c, is 1.6°C/W. Therefore, the required heat sink thermal resistance for a guaranteed ambient temperature, Ta, of 50°C will be as follows. From formula (1)' θc-a < (125 − 50)/46.0 < 1.63 From formula (2)' θc-a < (150 − 50)/46.0 − 1.6/4 < 1.77 Therefore, the value of 1.63°C/W, which satisfies both of these formulae, is the required thermal resistance of the heat sink. Note that this thermal design example assumes the use of a constant-voltage power supply, and is therefore not a verified design for any particular user’s end product. No. A1502-9/12 STK415-120-E STK415-100 Series Stand-by control, Mute control, Load-short protection & DC offset protection application *1 Set the limiting resistor value R1 so that the voltage applied to the standby STK415-100 series -VL 1 2 3 4 5 6 OUT OUT OUT OUT +VH Ch1+ Ch1- Ch2+ Ch2- +Pre GND SUB 7 8 IN NF STCh1 Ch1 BY pin (pin 17) never exceeds the maximum rated value VST max. NF Ch2 #17pin reference voltage VST IN Ch2 9 10 11 12 13 14 15 16 17 18 19 1kΩ 56kΩ +VL +OFF -OFF SET SET -Pre -VH 4.7kΩ 6.8kΩ 33kΩ *3 47μF /10V 56kΩ 0.22Ω *3 56kΩ (*1) R30 ex) 3.3kΩ 6.8kΩ 2kΩ GND Stand-by Control H: Operation Mode (+5V) L: Stand-by Mode (0V) Ch2 IN *2 10kΩ 56kΩ 0.22Ω GND 10kΩ *2 +VH Load Short Protection circuit +VL 0.1μF 22kΩ 56kΩ Latch up circuit 1kΩ Ch1 IN 10kΩ V1 GND Ch2 OUT -VL GND 82kΩ -VH GND 22μF 82kΩ 22μF 100kΩ 10kΩ Ch1 OUT 2.2kΩ (*4) R2 Stand-by Control 100 kΩ Mute Control H: Single Mute L: Normal +5V +5V Mute Control DC offset protection MUTE ST-BY PLAY MUTE ST-BY *2 METAL PLATE CEMENT RESISTOR 0.22Ω±10%(5W) *3 DIODE 3A/60V STK415-100 Series Application explanation Stand-by Circuit in Pre Driver IC STK415-100 series SW transistor 4.7kΩ (*3) ΔVBE 6 7 8 56kΩ 6.8kΩ 9 56kΩ Tr1 10 11 6.8kΩ 12 13 14 Ch1 IN Ch1 NF STBY 15 16 17 Ch2 NF Ch2 IN 18 19 0.22Ω/2W 5 1) Stand-by control circuit part H: Operation mode (+5V) L: Stand-by mode (0V) 1kΩ Point.B Point.C (2) Load short detection part 33kΩ (*1) R30 Tr5 ex) 3.3kΩ I1 47μF Tr2 Point.B 56kΩ 4 56kΩ 1 Ch1 Ch2 Ch1 Ch2 -VH +VH OUT(+) OUT(-) OUT(+) OUT(-) +PRE SUB GND 0.22Ω/2W -PRE Stand-By Control Voltage VST 2kΩ Point.C 22kΩ 56kΩ I3 Operate mode (VSTOFF)≥ 2.5V Stand-By mode (VSTON)< 0.6V (0V typ) Tr4 I2 1kΩ (*4) R2 0.1μF 10kΩ Tr3 100kΩ (3) Latch-up circuit part -VCC Tr5 82kΩ OUT Ch1 Tr6 OUT Ch2 22μF 82kΩ 22μF 100 kΩ (4) DC offset protection No. A1502-10/12 STK415-120-E The protection circuit application for the STK415-100sr consists of the following blocks (blocks (1) to (4)). (1) Standby control circuit block (2) Load short-circuit detection block (3) Latch-up circuit block (4) DC voltage protection block 1) Standby control circuit block Concerning pin 17 reference voltage VST <1> Operation mode The switching transistor of the predriver IC turns on when the pin 17 reference voltage, VST, becomes greater than or equal to 2.5V, placing the amplifier into the operation mode. Example: When VST (min.) = 2.5V I1 is approximately equal to 0.40mA since VST = (*2) × IST + 0.6V → 2.5V = 4.7kΩ × IST + 0.6V. <2> Standby mode The switching transistor of the predriver IC turns off when the pin 17 reference voltage, VST, becomes lower than or equal to 0.6V (typ. 0V), placing the amplifier into the standby mode. Example: When VST = 0.6V I1 is approximately equal to 0mA since VST = (*2) × IST + 0.6V → 0.6V = 4.7kΩ × IST + 0.6V. (*1) Limiting resistor Determine the value of R1 so that the voltage VST applied to the standby pin (pin 17) falls within the rating (+2.5V to 5.5V (typ. 3.0V)). (*2) The standby control voltage must be supplied from the host including microcontrollers. (*3) A 4.7kΩ limiting resistor is also incorporated inside the hybrid IC (at pin 17). 2) Load short-circuit detection block Since the voltage between point B and point C is less than 0.6V in normal operation mode (VBE < 0.6V) and TR1 (or TR2) is not activated, the load short-circuit detection block does not operate. When a load short-circuit occurs, however, the voltage between point B and point C becomes larger than 0.6V, causing TR1 (or TR2) to turn on (VBE > 0.6V), and current I2 to flows. 3) Latch-up circuit block TR3 is activated when I2 is supplied to the latch-up circuit. When TR3 turns on and current I3 starts flowing, VST goes down to 0V (standby mode), protecting the power amplifier. Since TR3 and TR4 configure a thyristor, once TR3 is activated, the IC is held in the standby mode. To release the standby mode and reactivate the power amplifier, it is necessary to set the standby control voltage (*2) temporarily low (0V). Subsequently, when the standby control is returned to high, the power amplifier will become active again. (*4) The I3 value varies depending on the supply voltage. Determine the value of R2 using the formula below, so that I1 is equal to or less than I3. I1 ≤ I3 = VCC/R2 4) DC offset protection block The DC offset protection circuit is activated when ±0.5V (typ) voltage is applied to either "OUT CH1" or "OUT CH2," and the hybrid IC is shut down (standby mode). To release the IC from the standby mode and reactivate the power amplifier, it is necessary to set the standby control voltage temporarily low (0V). Subsequently, when the standby control is returned to high (+5V, for example), the power amplifier will become active again. The protection level must be set using the 82kΩ resistor. Furthermore, the time constant must be determined using 22μ//22μ capacitors to prevent the amplifier from malfunctioning due to the audio signal. No. A1502-11/12 STK415-120-E STK415-100 Series BTL Application STK415-100 series +OFF -OFF -Pre GND IN NF ST- NF IN +V OUT OUT OUT OUT +Pre -VH H Ch1+ Ch1- Ch2+ Ch2L SET SET Ch1 Ch1 BY Ch2 Ch2 SUB 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 +VL -V R30 (*1) 0.22Ω 0.22Ω 100 pF 60V 60V /3A /3A 56kΩ 3pF 3pF 560Ω 560Ω 22μF /10V 22μF /10V 15V 1.5kΩ +VL 100μF /100V 100μF /50V 100μF /100V 56kΩ 100Ω/ 1W +VH 56kΩ 2.2μF /50V 33μF 33μF 3μH -VH 1.5kΩ -VL 100μF /100V 15V 100Ω/ 1W 100μF /100V GND 1kΩ Ch1 IN Ch2 OUT GND 100μF /50V Stand-By Control Voltage VST 56kΩ 470pF 1 (*1) The voltage applied to the Stand-by pin (#17) must not exceed the maximum rated value (VST max). 4.7Ω 0.1μF 4.7Ω/1W 3μH 0.1μF 4.7Ω/1W GND 4.7Ω RL=8Ω Ch1 OUT SANYO Semiconductor Co.,Ltd. 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 Semiconductor Co.,Ltd. products described or contained herein. SANYO Semiconductor Co.,Ltd. strives to supply high-quality high-reliability products, however, any and all semiconductor products fail or malfunction with some probability. It is possible that these probabilistic failures or malfunction could give rise to accidents or events that could endanger human lives, trouble that could give rise to smoke or fire, or accidents 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 Semiconductor Co.,Ltd. products described or contained herein are controlled under any of applicable local export control laws and regulations, such products may require 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 consent of SANYO Semiconductor 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 Semiconductor Co.,Ltd. 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. Upon using the technical information or products described herein, neither warranty nor license shall be granted with regard to intellectual property rights or any other rights of SANYO Semiconductor Co.,Ltd. or any third party. SANYO Semiconductor Co.,Ltd. shall not be liable for any claim or suits with regard to a third party's intellectual property rights which has resulted from the use of the technical information and products mentioned above. This catalog provides information as of July 2009. Specifications and information herein are subject to change without notice. PS No. A1502-12/12