LA4425AN Monolithic Linear IC 5W Power Amplifier with Very Few External Parts for Car Radio and Car Stereo http://onsemi.com Overview The LA4425AN 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 SIP5 9.5x11.8 / SIP5H Specifications Maximum Ratings at Ta = 25C Parameter Maximum supply voltage Surge maximum supply voltage Maximum output current Symbol VCC max VCC surge Allowable power dissipation IO peak Pd max Rg = 0 Conditions 18 Unit V Giant pulse 200ms Rise time 1ms 50 V 3.3 A With infinite heat sink Ratings 7.5 W Operating temperature Topr 40 to +85 C Storage temperature Tstg 40 to +150 C Stresses exceeding those listed in the Maximum Ratings table may damage the device. If any of these limits are exceeded, device functionality should not be assumed, damage may occur and reliability may be affected. ORDERING INFORMATION See detailed ordering and shipping information on page 10 of this data sheet. © Semiconductor Components Industries, LLC, 2014 September 2014 - Rev. 0 1 Publication Order Number : LA4425AN/D LA4425AN Operating Conditions at Ta = 25C, Parameter Recommended supply voltage Recommended load resistance Operating voltage range Operating load resistance range Symbol Conditions Ratings VCC Unit 13.2 V 4 RL VCC op RL op Under conditions where maximum ratings are not exceeded 5 to 16 V 2 to 8 Functional operation above the stresses listed in the Recommended Operating Ranges is not implied. Extended exposure to stresses beyond the Recommended Operating Ranges limits may affect device reliability. Electrical Characteristics at Ta 25C, VCC = 13.2V, RL = 4, f = 1 kHz, Rg = 600, specified board/specified circuit, 30301.5mm3 thick aluminum used Parameter Quiescent current Symbol Conditions 130 mA 47 dB 13.2 V / 4, THD = 10% 4 5 14.4 V / 4, THD = 10% 5 PO1 Total harmonic distortion PO2 THD Output noise voltage VNO Ripple rejection ratio SVRR1 Rg = 0, BPF = 20 Hz to 20 kHz VR = 0dBm, fR = 100Hz SVRR2 Rg = 0, BPF = 20 Hz to 20 kHz VR = 0dBm, fR = 100 Hz Rg = 0 Roll-off frequency Thermal operating temperature Unit 65 Output power VCCX max 45 VO = 0dBm Input resistance typ 43 VG Starting time min ICCO Voltage gain Over-voltage attack Ratings VO = 2V Rg = 0, BPF = 20 Hz to 20 kHz tS W 6 0.1 W 1.0 % 30 40 dB 30 40 dB 47 dB 21.5 V 0.35 s RIN 50 fL fH 40 k Hz 90 kHz Tc 125 C Product parametric performance is indicated in the Electrical Characteristics for the listed test conditions, unless otherwise noted. Product performance may not be indicated by the Electrical Characteristics if operated under different conditions. http://www.onsemi.com 2 LA4425AN Pd max -- Ta Allowable power dissipation, Pd max -- W 10 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 Ambient temperature, Ta -- °C Package Dimensions unit : mm SIP5 9.5x11.8 / SIP5H CASE 127AF ISSUE O http://www.onsemi.com 3 80 100 LA4425AN 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 LA4425AN + 4 2 speaker 4Ω 3 Pin Voltage at VCC = 13.2V Characteristics Small signal GND 2 Input Pin No. 1 Pin voltage (reference value) ( 2VBE) 1.4V Large signal GND 3 0V 0V Output VCC 4 5 ( 1/2VCC) 6.5V (VCC) 13.2V 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 LA4425AN Output coupling capacitor External Parts Input coupling capacitor Bootstrap capacitor - Feedback capacitor - Filter capacitor - - - - 8 pcs. 2 pcs. Phase compensation capacitor Oscillation correction polyester film capacitor Oscillation correction resistor Total Note: The power supply capacitor is not counted as a power IC part. http://www.onsemi.com 4 LA4425AN Sample Printed Circuit Pattern LA4425AN 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 Total harmonic distortion, THD -- % 3 -1 -2 fL -4 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 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 5 10k 2 3 1.0 VCC=13.2V RL=4Ω Rg=600Ω VO=2V(PO=1W) 7 5 3 2 0.1 7 5 3 3 5 100k Frequency, f -- Hz 5 7 100 2 3 5 7 1k 2 3 Frequency, f -- Hz http://www.onsemi.com 5 5 LA4425AN 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 0.8 RL=2Ω f=1kHz Rg=600Ω ICC 10 8 VCC=16V 600 400 VNO -- Rg 0.5 0.4 0.3 0.2 0.1 3 5 2 3 5 7 100k Signal source resistance, Rg -- Ω 2 2 3 5 Ripple rejection ratio, SVRR -- dB 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 0.6 2 6 Output power, PO -- W VCC=13.2V RL=4Ω BPF=20Hz to 20kHz Rg=0→0.12mV 1k 20 800 0 7 0.1 0 10 0.7 0 7 18 200 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 1000 40 30 20 0 0 1200 VCC=13.2V RL=4Ω Rg=0 VR=0dBm BPF=20Hz to 20kHz 10 Power supply ripple, VR -- mVrms 5 7 100 2 3 5 Ripple frequency, fR -- Hz http://www.onsemi.com 6 7 1k 2 Power dissipation, Pd -- W Total harmonic distortion, THD -- % 5 LA4425AN ICCO -- Ta VCC=13.2V RL=4Ω Rg=0 60 40 20 0 -60 -40 -20 0 20 40 VN -- Ta 10 8 Output pin voltage, VN -- V Quiescent current, ICCO -- mA 80 60 80 VCC=13.2V RL=4Ω Rg=0 6 4 2 0 -60 100 Ambient temperature, Ta -- °C 0 20 40 60 80 100 Ambient temperature, Ta -- °C 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 0.2s/div Ambient temperature, Ta -- °C VCC=13.2V/4Ω Rg=0 "OFF"locus 2V/div Output power, PO -- W -20 PO -- Ta 6 5 -40 GND 0.2s/div http://www.onsemi.com 7 LA4425AN 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 + LA4425AN SW2 SW4 Our company's recommended printed circuit board: Apply VCC=13.2V using a 30301.5mm3 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 LA4425AN 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. http://www.onsemi.com 8 LA4425AN Load Resistance and Misoperation It should be noted that when RL 2 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 + LA4425AN 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 LA4425AN 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 50k. 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) T.S.D is capable of starting operation at Tc 120 to 130C. 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. http://www.onsemi.com 9 LA4425AN 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. ORDERING INFORMATION Device LA4425AN-D-E Package SIP5 9.5x11.8 / SIP5H (Pb-Free) Shipping (Qty / Packing) 50 / Fan-Fold ON Semiconductor and the ON logo are registered trademarks of Semiconductor Components Industries, LLC (SCILLC) or its subsidiaries in the United States and/or other countries. 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. 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