Ordering number : EN3309D LA4425A Monolithic Linear IC 5W Power Amplifier with Very Few External Parts for Car Radio and Car Stereo http://onsemi.com Overview The LA4425A is a 5W power amplifier with very few external parts. The smallest package in the industry [SIP-5H(TO-126 type)]. Only two external parts (Only I/O coupling capacitors). Almost no evaluation, adjustment and check of its functions as a power IC required and simplified control Functions • Wide operation supply range → 5 to 16V • On-chip protection: - Over-voltage protection - Thermal protection - Output D.C. short protection . • On-chip pop noise reducing circuit Specifications Maximum Ratings at Ta = 25°C Parameter Maximum supply voltage Surge maximum supply voltage Symbol VCC max VCC surge Conditions Ratings Unit Rg = 0 18 V Giant pulse 200ms 50 V Rise time 1ms Maximum output current IO peak Allowable power dissipation Pd max With infinite heat sink 3.3 A 7.5 W Operating temperature Topr -30 to +80 °C Storage temperature Tstg -40 to +150 °C Stresses exceeding Maximum Ratings may damage the device. Maximum Ratings are stress ratings only. Functional operation above the Recommended Operating Conditions is not implied. Extended exposure to stresses above the Recommended Operating Conditions may affect device reliability. Semiconductor Components Industries, LLC, 2013 June, 2013 53007 MS PC/53096HA(II)/20293TS/9200TA,TS(KOTO)/3050TA,TS(AF) No.3309-1/9 LA4425A Operating Conditions at Ta = 25°C, Parameter Symbol Recommended supply voltage VCC Recommended load resistance RL Operating voltage range Conditions Ratings VCC op Operating load resistance range RL op Unit 13.2 V 4 Ω 5 to 16 V 2 to 8 Ω Under conditions where maximum ratings are not exceeded Electrical Characteristics at Ta = 25°C, VCC = 13.2V, RL = 4Ω, f = 1 kHz, Rg = 600Ω, specified board/specified circuit, 30×30×1.5mm3 thick aluminum used Ratings Parameter Symbol Conditions Unit min Quiescent current typ ICCO max 65 130 mA 43 45 47 dB 13.2 V / 4Ω, THD = 10% 4 5 PO2 14.4 V / 4Ω, THD = 10% 5 THD VO = 2V Voltage gain VG VO = 0dBm Output power PO1 Total harmonic distortion Output noise voltage VNO Rg = 0, BPF = 20 Hz to 20 kHz 30 40 dB Ripple rejection ratio SVRR1 Rg = 0, BPF = 20 Hz to 20 kHz 30 40 dB 47 dB 21.5 V 0.35 s W 6 W 0.1 1.0 % VR = 0dBm, fR = 100Hz SVRR2 Rg = 0, BPF = 20 Hz to 20 kHz VR = 0dBm, fR = 100 Hz Over-voltage attack VCCX Starting time Rg = 0 tS Input resistance Roll-off frequency Thermal operating temperature RIN 50 fL 40 kΩ Hz fH 90 kHz Tc 125 °C Package Dimensions unit : mm (typ) 3031C Pd max -- Ta Allowable power dissipation, Pd max -- W 10 9.5 2.7 3.2 0.51min 1.1 1.5 10.0 14.25max 13.0 (11.8) (2.0) (2.0) Al heat sink mounting toque 39N.cm with sillicone grease applied. 8 7.5 Infinite heat sink 12 °C / W 6 5.7 100×100×1.5mm3 50×50×1.5mm3 4.3 4 2.9 2 30×30×1.5mm3 No heat sink 1.2 0 -30 -20 0 20 40 60 80 100 Ambient temperature, Ta -- °C (0.75) 1 5 2.0 0.6 0.5 1.2 SANYO : SIP5H No.A0195-2/9 LA4425A Sample Application Circuit VCC 13.2V 5 Ci 2.2μF + + • On-chip overvoltage protection • On-chip thermal protection • On-chip pop noise reducing circuit • On-chip output D.C. short protection 1000μF 1 Co 1000μF LA4425A + 4 2 speaker 4Ω 3 Pin Voltage at VCC = 13.2V Characteristics Input Pin No. 1 Pin voltage (reference value) (≈ 2VBE) Small signal Large signal GND GND 2 3 0V 1.4V 0V Output VCC 4 5 (≈ 1/2VCC) (VCC) 13.2V 6.5V IC Usage Notes Maximum ratings If the IC is used in the vicinity of the maximum ratings, even a slight variation in conditions may cause the maximum ratings to be exceeded, thereby leading to a breakdown. Printed circuit board When drawing the printed circuit pattern, refer to the sample printed circuit pattern. Be careful not to form a feedback loop between input and output. Comparison of External Components Our ICs now in use LA4425A Output coupling capacitor External Parts Input coupling capacitor Bootstrap capacitor - Feedback capacitor - Filter capacitor - Phase compensation capacitor - - Oscillation correction polyester film capacitor Oscillation correction resistor Total - 8 pcs. 2 pcs. Note: The power supply capacitor is not counted as a power IC part. No.A0195-3/9 LA4425A Sample Printed Circuit Pattern LA4425A GND CVCC=1000μF − 5 1 + VCC + − OUT − IN + Co=1000μF Ci=2.2μF GND Cu-foiled side 78.0×29.0mm2 ICCO -- VCC 100 RL=4Ω Rg=0 10 80 Output pin voltage, VN -- V Quiescent current, ICCO -- mA VN -- VCC 12 60 40 20 RL=4Ω Rg=0 8 6 4 2 0 0 2 4 6 8 10 12 14 16 18 20 22 0 0 24 2 4 6 Supply voltage, VCC -- V Output power, PO -- W 3 2 PO -- VIN 10 VCC=13.2V RL=4Ω f=1kHz Rg=600Ω 7 Total harmonic distortion, THD -- % 10 7 5 1.0 7 5 3 2 0.1 7 5 3 2 1.0 8 14 16 18 20 22 24 5 3 5 7 10 7 10k 2 3 THD -- PO 2 1.0 7 5 3 2 0.1 7 2 3 5 7 10 2 3 5 7 5 5 100 7 0.1 2 3 0 2 -1 -2 fL fH -5 -6 -7 VCC=13.2V RL=4Ω Rg=600Ω VO=0dBm -8 -9 2 3 5 100 2 3 5 1k 2 3 Frequency, f -- Hz 5 10k 2 3 5 100k Total harmonic distortion, THD -- % 3 -4 7 2 1.0 3 THD -- f 1 -3 5 Output power, PO -- W f Response Response -- dB 12 VCC=13.2V RL=4Ω f=1kHz Rg=600Ω Input voltage, VIN -- mV -10 10 10 Supply voltage, VCC -- V 1.0 VCC=13.2V RL=4Ω Rg=600Ω VO=2V(PO=1W) 7 5 3 2 0.1 7 5 3 3 5 7 100 2 3 5 7 1k 2 3 5 Frequency, f -- Hz No.A0195-4/9 LA4425A THD -- VCC 12 RL=4Ω f=1kHz VO=2V(PO=1W) Rg=600Ω 3 2 10 Output power, PO -- W 1.0 7 5 3 2 PO -- VCC f=1kHz Rg=600Ω THD=10% RL=2Ω RL=4Ω 8 6 4 2 0.1 7 5 6 8 10 12 14 16 18 0 8 20 10 12 Supply voltage, VCC -- V 7 RL=4Ω f=1kHz Rg=600Ω ICC 6 500 5 VCC=16V 400 300 VCC=13.2V 4 3 200 2 100 1 0 7 2 0.1 3 5 7 2 1.0 3 5 1200 7 1000 Current drain, ICC -- mA Current drain, ICC -- mA 600 ICC, Pd -- PO Power dissipation, Pd -- W 700 RL=2Ω f=1kHz Rg=600Ω ICC 10 8 VCC=16V 600 400 VNO -- Rg 0.6 0.5 0.4 0.3 0.2 0.1 2 3 5 2 3 5 7 100k Signal source resistance, Rg -- Ω 2 2 3 5 20 VCC=13.2V RL=4Ω fR=100Hz Rg=0 BPF=20Hz to 20kHz 200 400 600 800 3 5 7 0 2 10 SVRR -- VCC 30 20 RL=4Ω VR=0dBm fR=100Hz Rg=0 BPF=20Hz to 20kHz 10 9 10 11 12 13 14 15 16 17 18 19 SVRR -- fR 50 30 0 0 2 Supply voltage, VCC -- V 40 10 7 1.0 40 0 8 2 SVRR -- VR 50 Ripple rejection ratio, SVRR -- dB 7 10k 4 VCC=13.2V 50 VCC=13.2V RL=4Ω BPF=20Hz to 20kHz Rg=0→0.12mV 1k 6 Output power, PO -- W 0.7 0 7 20 800 0 7 0.1 0 10 Ripple rejection ratio, SVRR -- dB 0.8 18 200 1000 Power supply ripple, VR -- mVrms 1200 Ripple rejection ratio, SVRR -- dB Output noise voltage, VNO -- mV 0.9 16 ICC, Pd -- PO Output power, PO -- W 1.0 14 Supply voltage, VCC -- V Power dissipation, Pd -- W Total harmonic distortion, THD -- % 5 40 30 20 VCC=13.2V RL=4Ω Rg=0 VR=0dBm BPF=20Hz to 20kHz 10 0 0 5 7 100 2 3 5 7 1k 2 Ripple frequency, fR -- Hz No.A0195-5/9 LA4425A ICCO -- Ta VCC=13.2V RL=4Ω Rg=0 60 40 20 0 -60 -40 -20 0 20 40 8 60 80 4 2 0 -60 100 -40 -20 0 20 40 60 80 100 Ambient temperature, Ta -- °C PO -- Ta 6 VCC=13.2V RL=4Ω f=1kHz THD=10% VCC=13.2V/4Ω Rg=0 Switch"ON"locus ts 2V/div 4 3 2 1 GND 0 -60 -40 -20 0 20 40 60 80 100 Ambient temperature, Ta -- °C 0.2s/div VCC=13.2V/4Ω Rg=0 "OFF"locus 2V/div Output power, PO -- W VCC=13.2V RL=4Ω Rg=0 6 Ambient temperature, Ta -- °C 5 VN -- Ta 10 Output pin voltage, VN -- V Quiescent current, ICCO -- mA 80 GND 0.2s/div No.A0195-6/9 LA4425A Instructions and Precautions • Connect a capacitor of 1000pF across pins and for external disturbance path. • Be careful of the ground line artwork when laying out the printed circuit pattern. Arrange so that the Sg route and load current flow-in route do not overlap. Refer to the recommended printed circuit pattern or make slits, etc. at pins and . DUAL Printed Circuit Pattern Example GND OUT1 1 IN1 GND VCC IN2 1 OUT2 Cu-foiled side 45.0×75.0mm2 • Short Circuit Tests SW1 SW3 + + 13.2V + LA4425A SW2 SW4 Our company's recommended printed circuit board: Apply VCC=13.2V using a 30×30×1.5mm3 thick aluminum board. The IC will be protected from the DC/AC shorting of switches 1 to 4 above. However, be careful not to damage the IC by turning VCC ”ON” when DC short (SW 1 or SW 2) is on. • Power Supply Positive Surge JASO tester Application of giant pulse 2.2μF 0.15μF + Rg 620Ω LA4425A 13.2V + 1000μF RL The over-voltage protector (VCCX ≈ 21.5V) inside the IC is used to cut all bias routes and reverse bias between B-E of output stage elements, in order to increase the power line’s capability of handling positive surge. This means, of course, that a VCES (VCBO) type output stage element is used instead of the VCEO (VCER) type. No.A0195-7/9 LA4425A • Load Resistance and Misoperation It should be noted that when RL < 2Ω and VCC is high, and the switch is turned “ON” when setting is for a signal (THD = 10%), the ground detector (current × voltage Schmitt circuit) operates momentarily. • Precautions on TaB If power voltage is applied to the IC substrate (the heat sink on a set), the IC structure is such that the PN junctions may be burned, causing deterioration or destruction. Consult Our company’s Quality Assurance Department with regard to the energy handling capability (voltage peak value, pulse width). Also, the IC TaB (substrate) is connected to pin 3, large signal GND. • Test of +VCC to Output Pin Floating + + b + LA4425A 13.2V a The power pin is in a floating state when a power capacitor is connected, so if +VCC touches output lines a and b , the upper power transistor inside the IC will be damaged. The LA4425A has a protective bypass route inside the IC. • Starting Time (ts) This is set at 0.35sec/typ, but it can be made shorter by making input capacitor Ci smaller, or longer by making it larger. • Pop noise The pop noise prevention circuit operates to reduce pop until Rg reaches 50kΩ. However, if Rg is left open, the charging route of input capacitor Ci is lost, so the pop noise reduction circuit stops operating and click noises become louder. • VG/OSC The voltage gain is fixed at 45dB inside the IC. It is impossible to change it externally. Phase compensation capacitors (350pF/total) are connected between individual stages inside the IC, and the open loop gain is low. In addition, the upper and lower drives are made equivalent so that final stage current gain is adjusted, providing a measure against unwanted high-frequency parasitic oscillation peculiar to power IC’s. • BTL Connection Connection is impossible with IC alone. • Reverse Mounting of IC The pin assignment is such that there is no danger of damage. ICC,PO • T.S.D (Thermal Shutdown) Operating Temperature 30×30×1.5mm3 thick Al board Ta=25°C 0 20 40 60 80 100 120 140 160 180 Tc (°C) No.A0195-8/9 LA4425A T.S.D is capable of starting operation at Tc 120 to 130°C. When this is converted to junction temperature (Tj) according to the formula below. Tj ≈ 165C, Tj = Qjc.Pd + Tc As T.S.D operation progresses, the output pin bias voltage drops, and it becomes harder to drive the upper waveform. Therefore, the current (ICC) and power (PO) show a tendency to decrease. Proper Cares in Mounting Radiator Fin 1. The mounting torque is in the range of 1. The mounting torque is in the range of 39 to 59 N.cm. 2. The distance between screw holes of the radiator fin must coincide with the distance between screw holes of the IC. 3. The screw to be used must have a head equivalent to the one of truss machine screw or binder machine screw defined by JIS. Washers must be also used to protect the IC case. 4. No foreign matter such as cutting particles shall exist between heat sink and radiator fin. When applying grease on the junction surface, it must be applied uniformly on the whole surface. 5. Because the heat sink mounting tab and the heat sink are at the same electric potential as the chip’s GND, care must be taken when mounting the heat sink on more than one device. 6. IC lead pins are soldered to the printed circuit board after the radiator fin is mounted on the IC. ON Semiconductor and the ON logo are registered trademarks of Semiconductor Components Industries, LLC (SCILLC). SCILLC owns the rights to a number of patents, trademarks, copyrights, trade secrets, and other intellectual property. A listing of SCILLC’s product/patent coverage may be accessed at www.onsemi.com/site/pdf/Patent-Marking.pdf. SCILLC reserves the right to make changes without further notice to any products herein. SCILLC makes no warranty, representation or guarantee regarding the suitability of its products for any particular purpose, nor does SCILLC assume any liability arising out of the application or use of any product or circuit, and specifically disclaims any and all liability, including without limitation special, consequential or incidental damages. “Typical” parameters which may be provided in SCILLC data sheets and/or specifications can and do vary in different applications and actual performance may vary over time. All operating parameters, including “Typicals” must be validated for each customer application by customer’s technical experts. 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