LA4485 datasheet(2/20 Pages) SANYO

Part #	LA4485

Description	5 W, Two-channel Power Amplifier with Very Few External Parts

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Manufacturer	SANYO [Sanyo Semicon Device]

Direct Link	https://www.sanyo-av.com/us/

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

Parameter

Symbol

Conditions

min

typ

max

Unit

Standby current

Ist

Pin 9 to GND, Standby switch OFF

10

µA

Quiescent supply current

ICCO

Rg = 0

40

80

160

mA

Voltage gain

VG1

Dual: VO = 0 dBm

43

45

47

dB

VG2

BTL: VO = 0 dBm

51

dB

Output power

PO1*

Dual: THD = 10%

4

5

W

PO2

BTL: THD = 10%

11

15

W

Total harmonic distortion

THD

PO = 1 W

0.15

0.8

%

Channel separation

CH sep

VO = 0 dBm, Rg = 0

45

55

dB

Output noise voltage

VNO

Rg = 0, 20 Hz to 20 kHz bandpass filter

0.15

0.5

mV

Ripple rejection ratio

SVRR

Rg = 0, 20 Hz to 20 kHz bandpass filter,

fR = 100 Hz, VR = 0 dBm, decoupling capacitor

connected

40

50

dB

*: PO1 = 6 W (typ) when VCC = 14.4 V

Voff

± 250 mV for BTL-mode

Equivalent Circuit Block Diagram

Pd max – Ta

Infinite heat sink

No heat sink

Al heat sink

mounting

conditions

Mounting

torque

39 Nvcm.

Flat washer

with silicone

grease

applied

Ambient temperature, Ta – °C

Filter

Large signal

VCC

Small signal

VCC

FILTER

CH1 IN

Input

amp

CH1

Output-to-ground

short-circuit

protection

Output-to-supply

short-circuit

protection

Output

amp

CH1 OUT

Thermal shutdown

protection

Small signal GND

REF

amp

Large signal GND

Overvoltage

protection

BTL IN

CH2 IN

Input

amp

CH2

Pre

drive

amp

Output-to-supply

short-circuit

protection

Output-to-ground

short-circuit

protection

Output

amp

CH2 OUT

Standby switch

Mute

BTL OUT

STANDBY

MUTE

Pre

drive

amp

LA4485

No.3680-2/20

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