LM4873LQ datasheet, PDF - EEWORLD Datasheet

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LM4873LQ: Description3W, 2 CHANNEL, AUDIO AMPLIFIER, QCC24, LLP-24; CategoryAnalog mixed-signal IC Consumption circuit; File Size2MB，26 Pages; ManufacturerRochester Electronics; Websitehttps://www.rocelec.com/; Environmental Compliance

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LM4873LQ Overview

3W, 2 CHANNEL, AUDIO AMPLIFIER, QCC24, LLP-24

LM4873LQ Parametric

Parameter Name	Attribute value
Is it lead-free?	Lead free
Maker	Rochester Electronics
Parts packaging code	QFN
package instruction	LLP-24
Contacts	24
Reach Compliance Code	unknown
Nominal bandwidth	20 kHz
Commercial integrated circuit types	AUDIO AMPLIFIER
JESD-30 code	R-XQCC-N24
JESD-609 code	e0
length	5 mm
Humidity sensitivity level	1
Number of channels	2
Number of functions	1
Number of terminals	24
Maximum operating temperature	85 °C
Minimum operating temperature	-40 °C
Nominal output power	3 W
Package body material	UNSPECIFIED
encapsulated code	HVQCCN
Package shape	RECTANGULAR
Package form	CHIP CARRIER, HEAT SINK/SLUG, VERY THIN PROFILE
Peak Reflow Temperature (Celsius)	235
Certification status	COMMERCIAL
Maximum seat height	0.8 mm
Maximum supply voltage (Vsup)	5.5 V
Minimum supply voltage (Vsup)	2 V
surface mount	YES
Temperature level	INDUSTRIAL
Terminal surface	TIN LEAD
Terminal form	NO LEAD
Terminal pitch	0.5 mm
Terminal location	QUAD
Maximum time at peak reflow temperature	30
width	4 mm

LM4873LQ Preview

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LM4873 Dual 2.1W Audio Amplifier Plus Stereo Headphone Function

October 2002

LM4873

Dual 2.1W Audio Amplifier Plus Stereo Headphone

Function

General Description

The LM4873 is a dual bridge-connected audio power ampli-

fier which, when connected to a 5V supply, will deliver 2.1W

to a 4Ω load (Note 1) or 2.4W to a 3Ω load (Note 2) with less

than 1.0% THD+N. In addition, the headphone input pin

allows the amplifiers to operate in single-ended mode when

driving stereo headphones. A MUX control pin allows selec-

tion between the two stereo sets of amplifier inputs. The

MUX control can also be used to select two different

closed-loop responses.

Boomer audio power amplifiers were designed specifically to

provide high quality output power from a surface mount

package while requiring few external components. To sim-

plify audio system design, the LM4873 combines dual bridge

speaker amplifiers and stereo headphone amplifiers on one

chip.

The LM4873 features an externally controlled, low-power

consumption shutdown mode, a stereo headphone amplifier

mode, and thermal shutdown protection. It also utilizes cir-

cuitry to reduce “clicks and pops” during device turn-on.

Note 1:

An LM4873MTE-1, LM4873MTE, or LM4873LQ that has been

properly mounted to a circuit board will deliver 2.1W into 4Ω. The other

package options for the LM4873 will deliver 1.1W into 8Ω. See the Applica-

tion Information sections for further information concerning the

LM4873MTE-1, LM4873MTE, and the LM4873LQ.

Note 2:

An LM4873MTE-1, LM4873MTE, or LM4873LQ that has been prop-

erly mounted to a circuit board and forced-air cooled will deliver 2.4W into 3Ω.

Key Specifications

at 1% THD+N

LM4873LQ, 3Ω, 4Ω loads

LM4873IBL, 8Ω load

LM4873MTE, 4Ω

LM4873, 8Ω

Single-ended mode THD+N

2.4W(typ), 2.1W(typ)

1.1W(typ)

1.9W(typ)

1.1W(typ)

0.5%(max)

0.7µA(typ)

2V to 5.5V

LM4873MTE-1, 3Ω, 4Ω loads 2.4W(typ), 2.1W(typ)

at 75mW into 32Ω

Shutdown current

Supply voltage range

Features

Input mux control and two separate inputs per channel

Stereo headphone amplifier mode

“Click and pop” suppression circuitry

Thermal shutdown protection circuitry

PCB area-saving micro SMD and thin micro SMD

packages

TSSOP and exposed-DAP TSSOP and LLP packages

Applications

Multimedia monitors

Portable and desktop computers

Portable audio systems

Connection Diagrams

10099330

10099302

Top View

Order Number LM4873MTE-1

See NS Package Number MXA28A for Exposed-DAP

TSSOP

Top View

Order Number LM4873MT, LM4873MTE

See NS Package Number MTC20 for TSSOP

See NS Package Number MXA20A for Exposed-DAP

TSSOP

Boomer

is a registered trademark of National Semiconductor Corporation.

DS100993

www.national.com

LM4873

Connection Diagrams

(Continued)

10099353

Top View

(Bump-side down)

Order Number LM4873IBL, LM4873ITL

See NS Package Number BLA20AAB for micro SMD

See NS Package Number TLA20AAA

10099338

Top View

Order Number LM4873LQ

See NS Package Number LQA24A for Exposed-DAP LLP

micro SMD Marking

10099357

10099328

Top View

XY - Date Code

TT - Die Traceability

G - Boomer Family

I - LM4873IBL

Top View

XY - Date Code

TT - Die Traceability

G - Boomer Family

B2 - LM4873ITL

LM4873IBP Pin Designations

Pin (Bump) Number

Pin (Bump) Function

-IN A

-IN B

-OUT A

GND

-OUT B

+IN A

Pin (Bump) Number

Pin (Bump) Function

+IN B

+OUT A

GND

+OUT B

MUX CTRL

SHUTDOWN

HP-IN

BYPASS

www.national.com

LM4873

Typical Application

10099331

Note: Pin out shown for the 28-pin Exposed-DAP TSSOP package. Refer to the Connection Diagrams for the pin out of the 20-pin Exposed-DAP TSSOP,

Exposed-DAP LLP, and micro SMD packages.

www.national.com

LM4873

Absolute Maximum Ratings

(Note 3)

(typ) — MTC20

(typ) — MXA20A

(typ) — MXA28A

(typ) — LQA24A

(typ) — micro SMD

20˚C/W

80˚C/W

2˚C/W

41˚C/W (Note 7)

51˚C/W (Note 8)

90˚C/W (Note 9)

2˚C/W

41˚C/W (Note 10)

51˚C/W (Note 11)

90˚C/W (Note 12)

3.0˚C/W

42˚C/W (Note 13)

60˚C/W (Note 14)

If Military/Aerospace specified devices are required,

please contact the National Semiconductor Sales Office/

Distributors for availability and specifications.

Supply Voltage

Storage Temperature

Input Voltage

Power Dissipation (Note 4)

ESD Susceptibility (Note 5)

ESD Susceptibility (Note 6)

Junction Temperature

Solder Information

Small Outline Package

Vapor Phase (60 sec.)

Infrared (15 sec.)

215˚C

220˚C

6.0V

−65˚C to +150˚C

−0.3V to V

+0.3V

Internally limited

2000V

200V

150˚C

Operating Ratings

Temperature Range

MIN

≤

MAX

Supply Voltage

−40˚C

≤

85˚C

2.0V

≤

5.5V

See AN-450 “Surface Mounting and their Effects on

Product Reliablilty” for other methods of soldering

surface mount devices.

Thermal Resistance

Electrical Characteristics

(Notes 3, 15)

The following specifications apply for V

= 5V unless otherwise noted. Limits apply for T

= 25˚C.

Symbol

Parameter

Conditions

LM4873

Typical

(Note 16)

Supply Voltage

Quiescent Power Supply Current

Shutdown Current

Headphone High Input Voltage

Headphone Low Input Voltage

= 0V, I

= 0A (Note 18) , HP-IN = 0V

= 0V, I

= 0A (Note 18) , HP-IN = 4V

applied to the SHUTDOWN pin

7.5

5.8

0.7

Limit

(Note 17)

5.5

0.8

V (min)

V (max)

mA (max)

mA (min)

µA (max)

V (min)

V (max)

Units

(Limits)

Electrical Characteristics for Bridged-Mode Operation

(Notes 3, 15)

The following specifications apply for V

= 5V unless otherwise specified. Limits apply for T

= 25˚C.

Symbol

Parameter

Conditions

LM4873

Typical

Output Offset Voltage

Output Power (Note 19)

= 0V

THD+N = 1%, f = 1kHz (Note 20)

LM4873MTE-1, R

= 3Ω

LM4873MTE, R

= 3Ω

LM4873LQ, R

= 3Ω

LM4873MTE-1, R

= 4Ω

LM4873MTE, R

= 4Ω

LM4873LQ, R

= 4Ω

LM4873MT, R

= 4Ω

LM4873, R

= 8Ω

2.4

2.2

2.1

1.9

1.1

1.0

W (min)

Limit

(Note 16) (Note 17)

mV (max)

Units

(Limits)

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LM4873LQ Related Products

	LM4873LQ	LM4873MT	LM4873MTE-1
Description	3W, 2 CHANNEL, AUDIO AMPLIFIER, QCC24, LLP-24	1.9W, 2 CHANNEL, AUDIO AMPLIFIER, PDSO20, 4.40 MM, PLASTIC, TSSOP-20	3W, 2 CHANNEL, AUDIO AMPLIFIER, PDSO28, 9.70 X 4.40 MM, 0.90 MM HEIGHT, TSSOP-28
Is it lead-free?	Lead free	Contains lead	Lead free
Maker	Rochester Electronics	Rochester Electronics	Rochester Electronics
Parts packaging code	QFN	TSSOP	SSOP
package instruction	LLP-24	4.40 MM, PLASTIC, TSSOP-20	9.70 X 4.40 MM, 0.90 MM HEIGHT, TSSOP-28
Contacts	24	20	28
Reach Compliance Code	unknown	unknown	unknown
Nominal bandwidth	20 kHz	20 kHz	20 kHz
Commercial integrated circuit types	AUDIO AMPLIFIER	AUDIO AMPLIFIER	AUDIO AMPLIFIER
JESD-30 code	R-XQCC-N24	R-PDSO-G20	R-PDSO-G28
JESD-609 code	e0	e0	e0
length	5 mm	6.5 mm	9.7 mm
Humidity sensitivity level	1	1	1
Number of channels	2	2	2
Number of functions	1	1	1
Number of terminals	24	20	28
Maximum operating temperature	85 °C	85 °C	85 °C
Minimum operating temperature	-40 °C	-40 °C	-40 °C
Nominal output power	3 W	1.9 W	3 W
Package body material	UNSPECIFIED	PLASTIC/EPOXY	PLASTIC/EPOXY
encapsulated code	HVQCCN	TSSOP	HTSSOP
Package shape	RECTANGULAR	RECTANGULAR	RECTANGULAR
Package form	CHIP CARRIER, HEAT SINK/SLUG, VERY THIN PROFILE	SMALL OUTLINE, THIN PROFILE, SHRINK PITCH	SMALL OUTLINE, HEAT SINK/SLUG, THIN PROFILE, SHRINK PITCH
Peak Reflow Temperature (Celsius)	235	260	260
Certification status	COMMERCIAL	COMMERCIAL	COMMERCIAL
Maximum seat height	0.8 mm	1.1 mm	1.1 mm
Maximum supply voltage (Vsup)	5.5 V	5.5 V	5.5 V
Minimum supply voltage (Vsup)	2 V	2 V	2 V
surface mount	YES	YES	YES
Temperature level	INDUSTRIAL	INDUSTRIAL	INDUSTRIAL
Terminal surface	TIN LEAD	TIN LEAD	TIN LEAD
Terminal form	NO LEAD	GULL WING	GULL WING
Terminal pitch	0.5 mm	0.65 mm	0.65 mm
Terminal location	QUAD	DUAL	DUAL
Maximum time at peak reflow temperature	30	40	40
width	4 mm	4.4 mm	4.4 mm
harmonic distortion	-	1%	1%

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