LA4425A

Ordering number: EN3309C Monolithic Linear IC LA4425A 5 W Power Amplifier with Very Few External Parts for Car Radio and Car Stereo Features Package Dimensions unit : mm . The world’s first 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 → [Simplified control] Wide operation supply range → 5 to 16 V On-chip protection: Overvoltage protection Thermal protection Output D.C. short protection 3031A-SIP-5H [LA4425A] . . . . On-chip pop noise reducing circuit Specifications Maximum Ratings at Ta = 25°C Parameter Maximum supply voltage Surge maximum supply voltage Maximum output current Allowable power dissipation Operating temperature Storage temperature Symbol VCC max VCC surge IO peak Pd max Topr Tstg With infinite heat sink Rg = 0 Giant pulse 200 msec Rise time 1 ms Conditions SANYO : SIP5H Ratings 18 50 3.3 7.5 –30 to +80 –40 to +150 Unit V V A W °C °C Operating Conditions at Ta = 25°C Parameter Recommended supply voltage Recommended load resistance Operating voltage range Operating load resistance range Symbol VCC RL VCC op RL op Under conditions where maximum ratings are not exceeded Conditions Ratings 13.2 4 5 to 16 2 to 8 Unit V Ω V Ω SANYO Electric Co.,Ltd. Semiconductor Bussiness Headquarters TOKYO OFFICE Tokyo Bldg., 1-10, 1 Chome, Ueno, Taito-ku, TOKYO, 110 JAPAN 53096HA(II)/20293TS/9200TA,TS(KOTO)/3050TA,TS(AF) No.3309-1/8 LA4425A Operating Characteristics at Ta = 25°C, VCC = 13.2 V, RL = 4 Ω, f = 1 kHz, Rg = 600 Ω, specified board/specified circuit, 30 × 30 × 1.5 mm3 thick aluminum used Parameter Quiescent current Voltage gain Output power Total harmonic distortion Output noise voltage Ripple rejection ratio SVRR2 Overvoltage attack Starting time Input resistance Roll-off frequency Thermal operating temperature VCCX ts RIN fL fH Tc Symbol ICCO VG PO1 PO2 THD VNO SVRR1 Conditions VO = 0 dBm 13.2 V/4 Ω, THD = 10% 14.4 V/4 Ω, THD = 10% VO = 2V Rg = 0, BPF = 20 Hz to 20 kHz Rg = 0, BPF = 20 Hz to 20 kHz VR = 0 dBm, fR = 100 Hz Rg = 0, BPF = 20 Hz to 20 kHz VR = 0 dBm, fR = 1 kHz Rg = 0 min 43 4 5 typ 65 45 5 6 0.1 0.15 40 47 21.5 0.35 50 40 90 125 max 130 47 Unit mA dB W W % mV dB dB V s kΩ Hz kHz °C 1.0 0.5 30 Sample Application Circuit Pd max – Ta With silicone grease applied. Heat sink mounting torque 39 N·cm With infinite heat sink . On-chip overvoltage protection . On-chip thermal protection . On-chip pop noise reducing circuit . On-chip output D.C. short protection Allowable Power Dissipation, Pd max – W With 100 × 100 × 1.5 mm3 Al heat sink With 50 × 50 × 1.5 mm3 Al heat sink With 30 × 30 × 1.5 mm3 Al heat sink No heat sink Pin Voltage at VCC = 13.2 V Characteristics Pin No. Pin voltage (reference value) Input 1 (6 2 VBE) 1.4 V Small signal GND 2 0V Ambient temperature, Ta – °C Large signal GND 3 0V Output 4 (6 1/2 VCC) 6.5 V VCC 5 (VCC) 13.2 V No.3309-2/8 LA4425A 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 External Parts Output coupling capacitor Input coupling capacitor Bootstrap capacitor Feedback capacitor Filter capacitor Phase compensation capacitor Oscillation correction polyester film capacitor Oscillation correction resistor Total Our ICs now in use j j j j j j j j 8 pcs. LA4425A j j — — — — — — 2 pcs. Note: The power supply capacitor is not counted as a power IC part. Sample Printed Circuit Pattern LA4425A GND – CVCC + = 1000 µF VCC + – OUT + Co = 1000 µF – IN Ci = 2.2 µF GND Cu-foiled side 78.0 × 29.0 mm2 ICCO – VCC Quiescent current, ICCO – mA VN – VCC Output pin voltage, VN – V Supply voltage, VCC – V Supply voltage, VCC – V No.3309-3/8 LA4425A PO – VIN Total harmonic distortion, THD – % THD – PO Ouput power, PO – W Input voltage, VIN – mV f Response Total harmonic distortion, THD – % Output power, PO – W THD – f Response – dB Frequency, f – Hz THD – VCC Total harmonic distortion, THD – % Frequency, f – Hz PO – VCC Supply voltage, VCC – V ICC, Pd – PO Power dissipation, Pd – W Output power, PO – W Supply voltage, VCC – V ICC, Pd – PO Power dissipation, Pd – W Output power, PO – W No.3309-4/8 Current drain, ICC – mA Output power, PO – W Current drain, ICC – mA LA4425A VNO – Rg Output noise voltage , VNO – mV Ripple rejection ratio, SVRR – dB SVRR – VCC BPF = 20 Hz to 20 kHz BPF = 20 Hz to 20 kHz Signal source resistance, Rg – Ω SVRR – VR Ripple rejection ratio, SVRR – dB Ripple rejection ratio, SVRR – dB Supply voltage, VCC – V SVRR – fR BPF = 20 Hz to 20 kHz BPF = 20 Hz to 20 kHz Power supply ripple, VR – mVrms ICCO – Ta Quiescent current, ICCO – mA Ripple frequency, fR – Hz VN – Ta Output pin voltage, VN – V Ambient temperature, Ta – °C PO – Ta Ambient temperature, Ta – °C Switch ‘‘ON’’ locus Output power, PO – W 2 V/div Ambient temperature, Ta – °C 0.2 s/div No.3309-5/8 LA4425A VCC = 13.2 V/4 Ω Rg = 0 ‘‘OFF’’ locus GND 0.2 s/div Instructions and Precautions . Connect a capacitor of 1000 pF across pins 1 and 2 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 2 and 3. DUAL Printed Circuit Pattern Example GND OUT1 2 V/div 1 IN1 VCC GND IN2 OUT2 1 . Short Circuit Tests Cu-foiled side 45.0 × 75.0 mm2 Sanyo’s recommended printed circuit board: Apply VCC = 13.2 V using a 30 × 30 × 1.5 mm3 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 No.3309-6/8 LA4425A The overvoltage protector (VCCX 6 21.5 V) 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. Load Resistance and Misoperation It should be noted that when RL < 2 Ω 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 Sanyo’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 +V CC to Output Pin Floating 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 (t ) This is set at 0.35 sec/typ, but it can be made shorter by making input capacitor Ci smaller, or longer by making it larger. . Pop noise s The pop noise prevention circuit operates to reduce pop until Rg reaches 50 kΩ. 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. The voltage gain is fixed at 45 dB inside the IC. It is impossible to change it externally. Phase compensation capacitors (350 pF/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. . VG/OSC . BTL Connection Connection is impossible with IC alone. . Reverse Mounting of IC The pin assignment is such that there is no danger of damage. . T.S.D (Thermal Shutdown) Operating Temperature ICC, PO 30 × 30 × 1.5 mm3 thick Al board Ta = 25°C TC(°C) No.3309-7/8 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 6 165°C, Tj = QjcvPd + 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. 2. 3. 4. 5. 6. The mounting torque is in the range of 39 to 59 Nvcm. The distance between screw holes of the radiator fin must coincide with the distance between screw holes of the IC. 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. 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. Because the heatsink mounting tab and the heatsink are at the same electric potential as the chip’s GND, care must be taken when mounting the heatsink on more than one device. IC lead pins are soldered to the printed circuit board after the radiator fin is mounted on the IC. 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: 1 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: 2 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 June, 1996 . Specifications and information herein are subject to change without notice. No.3309-8/8