PAM8905 Datasheet, PDF (4/9 Pages) Diodes Incorporated – 1.9W Class-D Audio Amplifier with Integrated Boost Converter and Battery Tracking AGC

A Product Line of
Diodes Incorporated
1.9W Class-D Audio Amplifier with Integrated
Boost Converter and Battery Tracking AGC
PAM8905
Electrical Characteristics (@VBAT=3.6V, AGC=GND, TA = +25°C, RL=8Ω+33µH, unless otherwise specified.)
Symbol
VBAT
Parameter
Supply Voltage
Po
Output Power
THD+N
Total Harmonic
Distortion Plus
Noise
Test Conditions
MIN
2.8
VBAT=3.6V

THD+N=1%,f=1kHz
VBAT=3.0V

VBAT=2.8V

Po=1.0W,RL=8Ω

f=1kHz
Po=2W,RL=4Ω

PSRR
Power Supply Ripple
Rejection
VBAT=3.6V, Inputs AC-
Grounded with C=1μF
f=217Hz

f=1kHz

SNR
Vop
Vo_TH
Vn
Signal-to-Noise Ratio
Peak Output Voltage
Boost Convertor Auto-Pass
Through Threshold
Output Noise
A-Weighting
VBAT=3.6V

Inputs AC-Grounded
THD+N=1%

f=1kHz



No A-Weighting

A-Weighting

η
Efficiency
VBAT=4.2V, Po=1.5W
f=1kHz

IQ
Quiescent Current
VBAT=3.6V
No Load

Isd
Shutdown Current
VBAT=2.8V to 5.2V
EN=0V

Rdson
Static Drain-to Source On-
State Resistor
High Side PMOS,I=500mA VBAT=5V
Low Side NMOS,I=500mA VBAT=5V


fsw
Switching Frequency
VBAT=2.8V to 5.2V
Boost

Class D

Gv
Closed-Loop Gain



TYP

1900
1750
1600
0.07
0.15
-70
-70
95
5.75
2
100
60
85
4

260
160
1200
300
20
MAX
5.2














1





RIN
Input Impedance
Av=20dB


24

Vos
Output Offset Voltage
Input AC-Ground



10
Ipeak
Convertor SW Peak Current VBAT=3.6V


2

Ton
Start-up Time From EN
VIH
EN Input High Voltage
VIL
EN Input Low Voltage

VBAT=5V
VBAT=5V


6


1.3





0.6
UNIT
V
mW
%
dB
dB
V
Vpk
μV
%
mA
μA
mΩ
mΩ
kHz
dB
KΩ
mV
A
mS
V
PAM8905
Document number: DS37026 Rev. 2 - 2
4 of 9
www.diodes.com
May 2015
© Diodes Incorporated