FAB3103 Datasheet, PDF (4/13 Pages) Fairchild Semiconductor – 2.3 Watt Class-D Audio Amplifier with Integrated Boost Regulator and Automatic Gain Control

Electrical Characteristics
Unless otherwise noted: AGCT=GND, R_L=8Ω + 33µH, f=1KHz, and audio measurement bandwidth=22Hz to 20KHz
(AES17). Typical values are at V_BATT=3.6V, T_A=25°C, with typical external component values.
Symbol
Parameter
Conditions
IDD Quiescent Current
ISD Shutdown Current
tWU Wake-Up Time
Inputs AC Grounded, EN=HIGH
EN=PGND, Inputs AC Grounded
From LOW to HIGH EN Transition to Full
Operation
fSW(AMP)
Class-D Switching
Frequency
VOS
Differential Output Offset
Voltage
Inputs AC Grounded
AV Gain
RIN Input Resistance
AGC Inactive
Gain=10V/V
(AGC Inactive)
Differential
Single-Ended
RSTD
Single-Ended Input
Impedance During
Shutdown
EN=PGND, AC-Coupled Inputs, VINx < 2Vrms
per Input
VSTD
Maximum Single-Ended
Input Voltage Swing
During Shutdown
EN=PGND, AC-Coupled Inputs
THD+N Added to Audio
Signal at Inputs During
Shutdown
EN=PGND, AC-Coupled Inputs,
Source Impedance < 1Ω
THD+N
PO
Total Harmonic Distortion
Plus Noise
Output Power
POUT=100mW
POUT=500mW
THD+N ≤ 10%
THD+N ≤ 1%
IDLMT
Class-D Output Current
Limit
PSRR
Power Supply Rejection
Ratio
Inputs Shorted, AC
Grounded, Output
fRIPPLE=1KHz, Boost
Enabled
Referred;
fRIPPLE=217Hz, Boost
VRIPPLE=200mVP-P
Enabled
Square Centered
Around VBATT=3.8V,
fRIPPLE=1KHz, Boost
Bypassed
50% Duty Cycle, 10µs
Rise/Fall Time
fRIPPLE=217Hz, Boost
Bypassed
CMRR
VBIAS

Common-Mode Rejection
Ratio
IN+, IN- Bias Voltage
Output Referred,
VRIPPLE=200m VP-P
Square, 50% Duty
Cycle, 10µs Rise/Fall
Time, Inputs Shorted
and AC-Coupled to
VRIPPLE
fRIPPLE=1KHz
fRIPPLE=217Hz
Efficiency
RL=8Ω + 33µH , POUT=1.0W
SNR Signal-To-Noise Ratio
POUT=1.85W, A-Weighted
POUT=1.85W, Unweighted
© 2011 Fairchild Semiconductor
FAB3103 • Rev. 1.0.2
4
Min. Typ. Max. Unit
2.7
mA
0.1 2.0 µA
5 12 ms
300
KHz
1.67 5.00 mV
9.5 10.0 10.5 V/V
24 30 36
KΩ
12 15 18
80
KΩ
2
Vrms
0.02 %
0.01
%
0.02
2.3
W
1.85
1.4
A
85
88
dB
77
70
75
dB
71
1.2
V
85
%
100
dB
97
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