NSC LME49830TB, LME49830 Datasheet

January 16, 2008

LME49830
Mono High Fidelity 200 Volt MOSFET Power Amplifier Input
Stage with Mute

General Description

The LME49830 is a high fidelity audio power amplifier input
stage designed for demanding consumer and pro-audio ap­plications. Amplifier output power may be scaled by changing
the supply voltage and number of output devices. The
LME49830 is capable of driving an output stage in excess of
300 W single-ended into an 8Ω load in the presence of 10%
high line headroom and 20% supply regulation.

The LME49830 includes internal thermal shut down circuitry
that activates when the LME49830 die temperature exceeds
150°C. The LME49830 has a mute function that mutes the
input drive signal and forces the amplifier output to a quies­cent state.

The LME49830 has high drive current, 56mA typical, and high
output voltage swing for maximum flexibility in output stage
choice. With a bias voltage range up to 16V the LME49830
can be used to drive MOSFET output stages using a wide
selection of MOSFETs.

The LME49830 has a wide operating supply range of ±20V
to ±100V, which allows lower cost, unregulated power sup­plies to be used.

Key Specifications

■ Wide operating Voltage range ±20V to ±100V

■ Output Voltage Noise (BW =

30kHz) 44μV (typ)

■ PSRR (DC) 105dB (typ)

■ Slew Rate 39V/μs (typ)

■ THD+N (f = 1kHz) 0.0006% (typ)

Features

■

High output current and voltage for use with MOSFET
output stages

■

Very high voltage range: ±20V - ±100V

■

Scalable output power

■

Minimum external components

■

External compensation

■

Thermal shutdown of input stage

■

Mute control

Applications

■

AV receivers

■

Audiophile power amps

■

Pro Audio

■

High voltage industrial applications

Overture® is a registered trademark of National Semiconductor Corporation.

© 2008 National Semiconductor Corporation 300050 www.national.com

LME49830 Mono High Fidelity 200 Volt MOSFET Power Amplifier Input Stage with Mute

Typical Application

30005090

FIGURE 1. Typical Audio Amplifier Application Circuit

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LME49830

Connection Diagram

Plastic Package (Note 8)

30005049

Top View

Order Number LME49830TB

See NS Package Number TB15A

N = National logo

U = Fabrication plant code

Z = Assembly plant code

XY = 2 Digit date code

TT = Die traceability

TB = Package code

Pin Descriptions

Pin Pin Name Description

1 NC No Connection, Pin electrically isolated

2 Mute Mute Control

3 GND Device Ground

4 IN+ Non-inverting input

5 IN- Inverting input

6 Comp External Compensation Connection

7 NC No Connection, Pin electrically isolated

8 Osense Output Sense

9 NC No Connection, Pin electrically isolated

10 -V

EE

Negative Power Supply

11 Bias

M

Negative External Bias Control

12 Bias

P

Positive External Bias Control

13 P

OUT

P-channel MOSFET Output

14 N

OUT

N-channel MOSFET Output

15 +V

CC

Positive Power Supply

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LME49830

Block Diagram

30005091

FIGURE 2. LME49830 Simplified Block Diagram

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LME49830

Absolute Maximum Ratings (Notes 1, 2)

If Military/Aerospace specified devices are required,
please contact the National Semiconductor Sales Office/
Distributors for availability and specifications.

Supply Voltage |V+| + |V-|

200V
Differential Input Voltage +/-6V
Common Mode Input Range 0.4 V

EE

to 0.4 V

CC

Power Dissipation (Note 3) 5.4W
ESD Rating (Note 4) 2.0kV
ESD Rating (Note 5) 200V
Junction Temperature (T

JMAX

)

150°C

Soldering Information

TB Package (10 seconds) 260°C
Storage Temperature -40°C to +150°C
Thermal Resistance

 θ

JA

73°C/W

 θ

JC

4°C/W

Operating Ratings (Notes 1, 2)

Temperature Range

T

MIN

≤ TA ≤ T

MAX

−40°C ≤ TA ≤ +85°C

Supply Voltage

±20V ≤ V

SUPPLY

≤ ±100V

Electrical Characteristics VCC = +100V, VEE = –100V (Notes 1, 2)

The following specifications apply for I

MUTE

= 150μA unless otherwise specified. Limits apply for TA = 25°C.

Symbol Parameter Conditions

LME49830

Units

(Limits)

Typical Limit

(Note 6) (Note 7)

I

CC

Total Positive Quiescent Power
Supply Current

VIN = 0V, VO = 0V, IO = 0A

19 24 mA (max)

I

EE

Total Negative Quiescent Power
Supply Current

VIN = 0V, VO = 0V, IO = 0A

–21 mA

THD+N

Total Harmonic Distortion +
Noise

No load, f = 1kHz, AV = 30dB
V

OUT

= 30V

RMS

, 30kHz BW

0.0006

%

V

BIAS

Bias Voltage 16 15 V (min)

A

V(CL)

Closed Loop Voltage Gain 26 dB (min)

A

V(OL)

Open Loop Gain

f = DC
V

IN

= 1mV

RMS

, f = 1kHz, CC = 10pF

112

88

82 dB (min)

V

OM

Output Voltage Swing THD = 0.05%, f = 20Hz to 20kHz 68 V

RMS

V

NOISE

Output Noise

RS = 10kΩ, AV = 30dB,
30kHz BW
A-weighted

44
28

μV (max)
μV (max)

I

OUT

Maximum Output Current Current from Output pins 56 47 mA (min)

I

MUTE

Current into Mute Pin To put part in “play” mode

130

μA (min)

SR Slew Rate

VIN = 1.2V

P-P

, AV = 30dB,

f = 10kHz square wave, C

LOAD

= 2,000pF

39

V/μs (min)

V

OS

Input Offset Voltage

VCM = 0V, IO = 0mA, I

MUTE

= 150μA

±0.9 ±3 mV (max)

VCM = 0V, IO = 0mA, I

MUTE

= 0μA

±0.4 ±4.2 mV (max)

I

B

Input Bias Current VCM = 0V, IO = 0mA

95 170 nA (max)

PSRR

AC

Power Supply Rejection Ratio
(AC)

RS = 1kΩ, f = 100Hz,V

RIPPLE

= 1V

RMS

,

Input Referred, AV = 30dB

104 dB

PSRR

DC

Power Supply Rejection Ratio
(DC)

RS = 1kΩ, Input Referred,
AV = 30dB

105 94 dB (min)

I

AB

Bias Control Current Shorted output, shorted bias control 2

1.6

2.5

mA (min)

mA (max)

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LME49830

Note 1: “Absolute Maximum Ratings” indicate limits beyond which damage to the device may occur, including inoperability and degradation of device reliability

and/or performance. Functional operation of the device and/or non-degradation at the Absolute Maximum Ratings or other conditions beyond those indicated in
the Recommended Operating Conditions is not implied. The Recommended Operating Conditions indicate conditions at which the device is functional and the
device should not be operated beyond such conditions. All voltages are measured with respect to the ground pin, unless otherwise specified.

Note 2: The Electrical Characteristics tables list guaranteed specifications under the listed Recommended Operating Conditions except as otherwise modified
or specified by the Electrical Characteristics Conditions and/or Notes. Typical specifications are estimations only and are not guaranteed.

Note 3: The maximum power dissipation must be derated at elevated temperatures and is dictated by T

JMAX

, θJA, and the ambient temperature, TA. The maximum

allowable power dissipation is P

DMAX

= (T

JMAX

- TA) / θJA or the number given in Absolute Maximum Ratings, whichever is lower. For the LME49830, T

JMAX

= 150°

C and the typical θ

JC

is 4°C/W.

Note 4: Human body model, applicable std. JESD22-A114C.

Note 5: Machine model, applicable std. JESD22-A115-A.

Note 6: Typical values represent most likely parametric norms at TA = +25°C, and at the Recommended Operation Conditions at the time of product

characterization and are not guaranteed.

Note 7: Datasheet min/max specification limits are guaranteed by test or statistical analysis.

Note 8: The TB15A is a non-isolated package. The package's metal back and any heat sink to which it is mounted are connected to the VEE potential when using

only thermal compound. If a mica washer is used in addition to thermal compound, θCS (case to sink) is increased, but the heat sink will be electrically isolated
from VEE.

Test Circuit Diagram

30005093

FIGURE 3. LME49830 Test Circuit Diagram

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LME49830

Typical Performance Characteristics

THD+N vs Frequency

+VCC = -VEE = 20V, VO = 5V

30005074

THD+N vs Frequency

+VCC = -VEE = 20V, VO = 10V

30005073

THD+N vs Frequency

+VCC = -VEE = 50V, VO = 14V

30005075

THD+N vs Frequency

+VCC = -VEE = 50V, VO = 20V

30005076

THD+N vs Frequency

+VCC = -VEE = 100V, VO = 14V

30005071

THD+N vs Frequency

+VCC = -VEE = 100V, VO = 30V

30005072

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LME49830