Kingbor Technology Co.,Ltd
TEL:(86)0755-26508846 FAX:(86)0755-26509052
KBA2338
3W F ilterle ss C lass-D Audio P owe r Am plifie r
General Description
The kB2338A is a high efficiency, 3W mono class-D audio
power amplifier. A low noise, filterless PWM architecture
eliminates the output filter, reducing external component
count, system cost, and simplifying design.
Operating in a single 5V supply, kB2338A is capable of
driving 4 speaker load at a continuous average output of
3W/10% THD+N or 2W/1% THD+N. The kB2338A has
high efficiency with speaker load compared to a typical
class AB amplifier. With a 3.6V supply driving an 8
speaker , the efficiency for a 400mW power level is 88%.
In cellular handsets, the earpiece, speaker phone, and
melody ringer can each be driven by the kB2338A. The
gain of kB2338A is externally configurable which allows
independent gain control from multiple sources by
summing signals from seperate sources.
The kB2338A is available in space-saving WCSP and
DFN packages.
MARKING
DIAGRAMS
A3
C3
1
9 PIN FLIP CHIP WCSP
A1
A20
5
C1
8
1
8 PIN UDFN 2x2.2
SD
NC
INP
INM
1
2
3
4
8
7
6
5
OUTM
GND
VP
OUTP
Features
Unique Modulation Scheme Reduces EMI Emissions
Efficiency at 3.6V With an 8- Speaker:
88% at 400 mW
80% at 100 mW
Low 2.38-mA Quiescent Current and
0.5-µA Shutdown Current
2.5V to 6.0V Wide Supply Voltage
Optimized PWM Output Stage Eliminates
LC Output Filter
Improved PSRR ( 72 dB) Eliminates Need for a
Voltage Regulator
Fully Differential Design Reduces RF Rectification
and Eliminates Bypass Capacitor
Improved CMRR Eliminates Two Input
Coupling Capacitors
Internally Generated 250-kHz Switching Frequency
Integrated Pop and Click Suppression Circuitry
1.5mm 1.5mm Wafer Chip Scale Package (WCSP)
and 3mm 3mm DFN-8 package
RoHS compliant and 100% lead(Pb)-free
Applications
•
•
•
•
Cellular Phone
Portable Electronic Devices
PDAs and Smart Phones
Portable Computer
Ordering Information
Order Number
kBA2338B-UDFN
kBA2338-WCSP
Package Type
UDFN-8
WCSP-9
Marking
xxxx
A20 5
Operating Temperature range
-40 °C to 85°C
-40 °C to 85°C
March 2007
1
KINGBOR [ KINGBOR TECHNOLOGY CO ]
