LA4592W.PDF

Ordering number : EN5662

Monolithic Linear IC

LA4592W

1.5-V Preamplifier + Power Amplifier

for Headphone Stereo Products

Overview

The LA4592W is a single-chip 1.5-V headphone stereo

system IC. The LA4592W adds a variety of functions,

including a switch amplifier (for end product audio quality

switches, the metal tape switch, and other switches) and an

AMSS (Automatic Music Search System) function that

supports blank skipping, to the earlier LA4590W.

Furthermore, the LA4592W provides even lower no-signal

time power levels for lower end-product power

dissipation. In combination with the LA3235W 1.5-V

record preamplifier IC, the LA4592W can be used to

implement a record/playback cassette system with just two

ICs.

functions.

• Ripple filter

• Low boost function (BTL operation in the low-

frequency region)

• Inter-track detection function (Supports AMSS and

blank skipping)

• Two switching amplifiers

• Power switch (standby function)

Features

• Virtual ground impedance is reduced by built-in V REF

amplifier

• No capacitor required for ripple filter oscillation

prevention.

• Provides ample output power at low frequencies.

(P O = 24 mW, V CC = 1.2 V, f = 150 Hz)

• High-frequency cutoff capacitors built into the

preamplifier and power amplifier inputs to minimize

buzzing.

Functions

• Stereo preamplifier: supports auto reverse and includes a

muting function.

• Stereo power amplifier: Includes OCL and muting

Package Dimensions

unit: mm

3163A-SQFP48

[LA4592W]

Ambient temperature, Ta – °C

Specifications

Maximum Ratings at Ta = 25°C

SANYO: SQFP48

Parameter

Symbol

Conditions

Ratings

Unit

Maximum supply voltage

V CC max

3.0

Allowable power dissipation

Pd max

320

Operating temperature

Topr

–10 to +60

°C

Storage temperature

Tstg

–40 to +125

°C

Allowable Operating Ranges at Ta = 25°C

Parameter

Symbol

Conditions

Ratings

Unit

Recommended supply voltage

V CC

1.5

Operating supply voltage range

V CC op

0.95 to 2.2

SANYO Electric Co.,Ltd. Semiconductor Bussiness Headquarters

TOKYO OFFICE Tokyo Bldg., 1-10, 1 Chome, Ueno, Taito-ku, TOKYO, 110 JAPAN

73097HA (OT) No. 5662-1/5

LA4592W

Operating Characteristics at Ta = 25°C, V CC = 1.2 V, f = 1 kHz, 0.775 V = 0 dB, R L = 10 k

(preamplifier)

RL = 16

(power amplifier)

Ratings

Parameter

Symbol

Conditions

Unit

min

typ

max

[PRE + PWR]

Quiescent current

I CCO 1

Rg = 2.2 k ½ , R V = 0 ½

8.5

I CCO 2

With the power switch off

0.1

µA

Voltage gain (closed loop)

VG T

V O = –20 dBm, R V = 10 k ½

[PRE AMP]

Voltage gain (open loop)

VG 0

V O = –20dBm

Voltage gain (closed loop)

VG 1

V O = –20dBm

35.3

Maximum output voltage

V O max1 THD = 1 %

100

210

Total harmonic distortion

THD1

VG = 35.3 dB/NAB, V O = 100 mV

0.08

0.5

Equivalent input noise voltage

V N 1

Rg = 2.2 k ½ , BPF = 20 Hz to 20 kHz

1.3

3.0

µV

Interchannel crosstalk

CT1

Rg = 2.2 k ½ , TUNE 1 kHz, V O = –20 dBm

F/R crosstalk

CT2

Rg = 2.2 k ½ , TUNE 1 kHz, V O = –20 dBm

Ripple rejection ratio

R r 1

Rg = 2.2 k ½ , Vr = –30 dBm,

Muting output voltage

V M 1

V IN = –40 dBm, TUNR 1 kHz,

–90

dBm

[Low Boost + Power Amplifier]

VG 3

V O = –20 dBm

20.5

25.5

Voltage gain (closed loop)

VG 4

V O = –20 dBm, L.B = ON

20.5

25.5

VG 5

V O = –20 dBm, L.B = ON, f = 10 kHz

24.5

27.5

30.5

VG 6

V O = –20 dBm, L.B = ON, f = 100 Hz

Output voltage

P O 1

THD = 10 %

P O 2

THD = 10 %, f = 100 Hz, L.B = ON

Total harmonic distortion

THD2

P O = 1 mW

0.3

1.5

Interchannel crosstalk

CT3

V O = –20 dBm, R V = 0 ½

Output noise voltage

V NO

R V = 0 ½ , BPF = 20 Hz to 20 kHz

µV

Ripple rejection ratio

R r 2

R V = 0 ½ , Vr = –30 dBm,

Muting output voltage

V M 2

V IN = –30 dBm, TUNE 1 kHz,

–90

dBm

Input resistance

k ½

Voltage gain difference

Æ VG3

1.5

[Ripple Filter]

Ripple rejection ratio

R r 3

fr = 100 Hz, Vr = –30 dBm, V CC = 1.0 V,

Output voltage

V RF

V CC = 1.0 V, I RF = 25 mA

0.89

0.94

[AMSS]

The preamplifier output voltage

Operating output voltage

V OAMSS 1 when the AMSS V O = 0.6 V p-o

3.33

4.7

6.64

With the PWR muting on. (AMSS)

The preamplifier output voltage

Operating output voltage

V OAMSS 2 when the AMSS V O = 0.6 V p-o

479

675

953

µV

With the PWR muting off. (BLANK SKIP)

The preamplifier output voltage

when the AMSS V O = 0.6 V p-o

Operating output voltage

V OAMSS 3

With pin 34 shorted through a 270- ½

resistor.

2.62

3.7

5.23

With the PWR muting on.

The preamplifier output voltage

when the AMSS V O = 0.6 V p-o

Operating output voltage

V OAMSS 4

With pin 34 shorted through a 270- ½

resistor.

375

530

749

µV

With the PWR muting on.

[SW AMP]

Voltage gain (closed loop)

VG 7

V O = –25 dBm

–1.2

–0.7

–0.2

Maximum output voltage

V O max2 THD = 1 %

Ripple rejection ratio

R r 4

With the input pins open, Vr = –30 dBm,

Output voltage when off

V M 3

V IN = –20 dBm, TUNE 1 kHz, SW OFF

–90

dBm

No. 5662-2/5

fr = 100 Hz, TUNE 100 Hz

With the muting function on

fr = 100 Hz, TUNE 100 Hz

With the muting function on

I RF = 25 mA, using a rank 6 2SB1295

fr = 100 Hz, TUNE 100 Hz

LA4592W

AMSS Temperature Characteristics (Values for reference only)

Ratings

Parameter

Symbol

Conditions

Unit

min

typ

max

AMSS

–10

°C

The preamplifier output voltage

V OAMSS1 when the AMSS V O = 0.6 V p-o

3.9

4.7

5.4

Operating output voltage

With the PWR muting on. (AMSS)

The preamplifier output voltage

V OAMSS2 when the AMSS V O = 0.6 V p-o

605

675

735

µV

Block Diagram

No. 5662-3/5

LA4592W

Test Circuit Diagram

No. 5662-4/5

LA4592W

Sample Application Circuit

* : Adjust the values of the capacitors marked with an asterisk to match the timing required by the end product.

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:

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:

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 July, 1997. Specifications and information herein are subject to change

without notice.

No. 5662-5/5

Plik z chomika:

Inne pliki z tego folderu:

Inne foldery tego chomika: