LM48520, LM48520TLBD

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SNAS367C – FEBRUARY 2008 – REVISED APRIL 2013

Electrical Characteristics VDD = 3.3V

(1)(2) (continued)

The following specifications apply for VDD = 3.3V, AV = 6dB, RL = 15µH + 8Ω +15µH, fIN = 1kHz, unless otherwise specified.

Limits apply for TA = 25°C, R1 = 40.2kΩ, R2 = 16.2kΩ, V1 = PV1 = 5V, Vlimit = GND. All electrical specifications are for amplifier

and booster.

LM48520

Units

Parameter

Test Conditions

Typ

Limit

(Limits)

(3)

(4) (5)

VRIPPLE = 200mVP-P Sine,

82

dB

fRIPPLE = = 217Hz

PSRR

Power Supply Rejection Ratio

VRIPPLE = 200mVP-P Sine,

79

dB

fRIPPLE = = 1kHz

CMRR

Common Mode Rejection Ratio

VRIPPLE = 1VP-P, fRIPPLE = 217Hz

67

dB

PO = 1W, f = 1kHz,

RL = 15μH + 8Ω + 15μH

η

Efficiency

78

%

VDD = 3.3V

VDD = 4.2V

VFB

Feedback Pin Reference Voltage

See (6)

1.24

V

Output Voltage in clipped state with

Vlimit = 2V, RL = 8Ω, VIN = 2VP

1.9

Vpk (min)

Vout clipped

2.5

soft clip activated

Vout clipped = 8/3 (PV1 – 2Vlimit)

3.2

Vpk (max)

(6)

Feedback pin reference voltage is measured with the Audio Amplifier disconnected from the Boost converter (the Boost converter is

unloaded).

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