LM48512TLSLASHNOPB datasheet(5/22 Pages) TI

5 / 22 page

LM48512

www.ti.com

SNAS497A – OCTOBER 2010 – REVISED APRIL 2012

Electrical Characteristics VDD = 3.6V, PVDD = 5.75V

(1) (2)

The following specifications apply for AV = 2V/V, L = 2.2μH, RL = 15μH + 8Ω + 15μH

(3), f = 1kHz, unless otherwise specified.

Limits apply for TA = 25°C.

LM48512

Units

Symbol

Parameter

Conditions

Typical

Limit

(Limits)

(4)

(5)

VOS

Differential Output Offset Voltage

VIN = 0, VDD = 2.3V to 5.5V

VIN = 0, RL = ∞

IDD

Quiescent Power Supply Current

VDD = 3.6V

14.5

mA (max)

Boost Converter Only

8.5

SDREG = VDD

PVOUT

Boost Converter Output Voltage

5.75

SDAMP = GND

ISD

Shutdown Current

SDAMP = SDREG = GND

0.04

μA (max)

VIH

Logic Input High Voltage

1.35

V (min)

VIL

Logic Input Low Voltage

0.35

V (max)

TWU

Wake Up Time

fSW(AMP)

Class D Switching Frequency

320

kHz

GAIN = GND (<0.7V)

±5%

V/V (max)

Gain

GAIN = float (0.7V–1.0V)

±5%

V/V (max)

GAIN = VDD (>1.0V)

±5%

V/V (max)

AV = 2V/V (6dB)

Ω

AV = 6V/V (15.5dB)

Ω

RIN

Input Resistance

AV = 10V/V (20dB)

Ω (min)

SDAMP = SDREG = GND

Ω

VCM

Input Common Mode

1.4

VIN

Differential AC Input

Device Enabled or Disabled

5.6

VP-P (max)

RL = 15μH+8Ω+15μH, THD+N =

10%

2.2

f = 1kHz, 22kHz BW

Output Power

RL = 15μH+8Ω+15μH, THD+N = 1%

1.8

1.7

W (min)

f = 1kHz, 22kHz BW

RL = 15μH+4Ω+15μH, THD+N = 1%

2.7

f = 1kHz, 22kHz BW

RL = 15μH+8Ω+15μH, f = 1kHz

PO = 100mW

0.03

PO = 1W

0.03

THD+N

Total Harmonic Distortion + Noise

RL = 15μH+4Ω+15μH, f = 1kHz

PO = 1W

0.03

VRIPPLE = 200mVP-P Sine

Inputs AC GND, Input referred

CIN = 100nF, fRIPPLE = 217Hz

PSRR

Power Supply Rejection Ratio

VRIPPLE = 200mVP-P Sine

Inputs AC GND, Input referred

CIN = 100nF, fRIPPLE = 1kHz

(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.

(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.

(3)

RL is a resistive load in series with two inductors to simulate an actual speaker load. For RL = 8Ω, the load is 15µH+8Ω+15µH. For RL =

Ω, the load is 15µH+4Ω+15µH.

(4)

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.

(5)

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

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