Datasheet LA4425A Datasheet (SANYO)

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Ordering number: EN3309C

Monolithic Linear IC

LA4425A

5 W Power Amplifier with Very Few External Parts

for Car Radio and Car Stereo

Features

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 → 5to16V

On-chip protection:

Overvoltage protection Thermal protection Output D.C. short protection

On-chip pop noise reducing circuit

Package Dimensions

unit : mm

3031A-SIP-5H

[LA4425A]

SANYO : SIP5H

Specifications

Maximum Ratings at Ta = 25°C

Parameter Symbol Conditions Ratings Unit

Maximum supply voltage V Surge maximum supply voltage V Maximum output current I

Allowable power dissipation Pd max With infinite heat sink 7.5 W Operating temperature Topr –30 to +80 °C Storage temperature Tstg –40 to +150 °C

max Rg = 0 18 V

surge

peak 3.3 A

Giant pulse 200 msec Rise time 1 ms

50 V

Operating Conditions at Ta = 25°C

Parameter Symbol Conditions Ratings Unit Recommended supply voltage V Recommended load resistance R Operating voltage range V

Operating load resistance range R

op 5to16 V

Under conditions where maximum ratings are not exceeded

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

13.2 V 4 Ω

2to8 Ω

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LA4425A

Operating Characteristics at Ta = 25°C, VCC= 13.2 V, RL=4Ω,f=1kHz, Rg = 600 Ω, specified

board/specified circuit, 30 × 30 × 1.5 mm

Parameter Symbol Conditions min typ max Unit Quiescent current I Voltage gain VG V

Output power Total harmonic distortion THD V

Output noise voltage V

Ripple rejection ratio

Overvoltage attack V Starting time t Input resistance R

Roll-off frequency Thermal operating temperature Tc 125 °C

CCO

1 13.2 V/4 Ω, THD = 10% 4 5 W

2 14.4 V/4 Ω, THD = 10% 5 6 W

SVRR

CCX

s IN

= 0 dBm 43 45 47 dB

= 2V 0.1 1.0 %

Rg = 0, BPF = 20 Hz to 20 kHz 0.15 0.5 mV Rg=0,BPF=20Hzto20kHz

= 0 dBm, fR= 100 Hz

Rg=0,BPF=20Hzto20kHz V

= 0 dBm, fR= 1 kHz

Rg = 0 21.5 V

thick aluminum used

65 130 mA

30 40 dB

47 dB

0.35 s 50 kΩ 40 Hz 90 kHz

Sample Application Circuit

Pd max – Ta

With silicone grease applied. Heat sink mounting torque 39 N·cm

On-chip overvoltage protection

On-chip thermal protection

On-chip pop noise reducing circuit

On-chip output D.C. short protection

With infinite heat sink

With 100 × 100 × 1.5 mm

With 50 × 50 × 1.5 mm Al heat sink

With 30 × 30 × 1.5 mm

Allowable Power Dissipation, Pd max – W

Al heat sink

No heat sink

Pin Voltage at VCC= 13.2 V

Characteristics Input

PinNo. 12345

Pin voltage

(reference value)

(6 2V

1.4 V

Ambient temperature, Ta – °C

Small signal

GND

)

0V 0V

Large signal

GND

Output V

(6 1/2 VCC)

6.5 V

(VCC)

13.2 V

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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 Our ICs now in use LA4425A Output coupling capacitor jj Input coupling capacitor jj Bootstrap capacitor j — Feedback capacitor j — Filter capacitor j — Phase compensation capacitor j — Oscillation correction polyester

film capacitor Oscillation correction resistor j —

Total 8 pcs. 2 pcs.

j —

Note: The power supply capacitor is not counted as a power IC part.

Sample Printed Circuit Pattern

–mA

CCO

GND

OUT Co = 1000 µF

= 1000 µF

– +

+–

CCO–VCC

LA4425A

–

Ci = 2.2 µF GND

Cu-foiled side 78.0 × 29.0 mm

VN–V

–V

Quiescent current, I

Supply voltage, VCC–V

Output pin voltage, V

Supply voltage, VCC–V

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LA4425A

–W

Ouput power, P

PO–V

Input voltage, VIN–mV

f Response

THD–P

Total harmonic distortion, THD – %

Output power, PO–W

THD–f

Response – dB

Total harmonic distortion, THD – %

Frequency,f–Hz

THD–V

Frequency,f–Hz

PO–V

–W

Output power, P

Total harmonic distortion, THD – %

Supply voltage, VCC–V

ICC,Pd–P

Supply voltage, VCC–V

ICC,Pd–P

–mA

Current drain, I

Output power, PO–W

Power dissipation, Pd – W

–mA

Current drain, I

Power dissipation, Pd – W

Output power, PO–W

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LA4425A

BPF=20Hzto20kHz

–mV

Output noise voltage , V

VNO–Rg

Signal source resistance, Rg – Ω

SVRR – V

Ripple rejection ratio, SVRR – dB

BPF=20Hzto20kHz

Supply voltage, VCC–V

SVRR – fR

Ripple rejection ratio, SVRR – dB

–mA

CCO

Quiescent current, I

–W

BPF=20Hzto20kHz

Power supply ripple, VR– mVrms

–Ta

CCO

Ambient temperature, Ta – °C

PO–Ta

Ripple rejection ratio, SVRR – dB

–V

Output pin voltage, V

BPF=20Hzto20kHz

Ripple frequency, fR–Hz

VN–Ta

Ambient temperature, Ta – °C

Switch ‘‘ON’’ locus

2 V/div

Output power, P

Ambient temperature, Ta – °C

0.2 s/div

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LA4425A

VCC= 13.2 V/4 Ω Rg=0 ‘‘OFF’’ locus

2 V/div

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

OUT1

OUT2

Short Circuit Tests

GND

IN1

GND

IN2

Cu-foiled side 45.0 × 75.0 mm

Sanyo’s recommended printed circuit board: Apply V be protected from the DC/AC shorting of switches 1 to 4 above. However, be careful not to damage the IC by turning V when DC short (SW 1 or SW 2) is on.

Power Supply Positive Surge

= 13.2 V using a 30 × 30 × 1.5 mm3thick aluminum board. The IC will

JASO tester Application of giant pulse

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‘‘ON’’

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LA4425A

The overvoltage protector (V stage elements, in order to increase the power line’s capability of handling positive surge. This means, of course, that a V (V

) type output stage element is used instead of the V

CBO

Load Resistance and Misoperation

It should be noted that when R 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 +VCCto Output Pin

The power pin is in a floating state when a power capacitor is connected, so if +V 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 0.35 sec/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 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.

VG/OSC

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.

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

6 21.5 V) inside the IC is used to cut all bias routes and reverse bias between B-E of output

CCX

CEO(VCER

< 2 Ω and VCCis high, and the switch is turned ‘‘ON’’ when setting is for a signal (THD =

) type.

Floating

touches output lines a and b, the upper

CES

30 × 30 × 1.5 mm3thick Al board Ta = 25°C

TC(°C)

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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 (I

Proper Cares in Mounting Radiator Fin

1. The mounting torque is in the range of 39 to 59 Nvcm.

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 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.

6. IC lead pins are soldered to the printed circuit board after the radiator fin is mounted on the IC.

) and power (PO) show a tendency to decrease.

No products described or contained herein areintendedforuse 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.

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