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PDF KBA2338 Data sheet ( Hoja de datos )
| Número de pieza | KBA2338 | |
| Descripción | 3W F ilterless C lass-D Audio Power Amplifier | |
| Fabricantes | Kingbor Technology | |
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Kingbor Technology Co.,Ltd
TEL:(86)0755-26508846 FAX:(86)0755-26509052
KBA2338
www.DataSheet4U.com
3 W F ilte rle ss C la ss-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 4ȍ 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 8ȍ
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.
1
9ïPIN FLIPïCHIP WCSP
MARKING
DIAGRAMS
A3 C3
A20
5
A1 C1
8
1
8 PIN UDFN 2x2.2
SD 1
NC 2
INP 3
INM 4
8 OUTM
7 GND
6 VP
5 OUTP
Features
z Unique Modulation Scheme Reduces EMI Emissions
z Efficiency at 3.6V With an 8-ȍ Speaker:
í 88% at 400 mW
í 80% at 100 mW
z Low 2.38-mA Quiescent Current and
0.5-µA Shutdown Current
z 2.5V to 6.0V Wide Supply Voltage
z Optimized PWM Output Stage Eliminates
LC Output Filter
z Improved PSRR (í72 dB) Eliminates Need for a
Voltage Regulator
z Fully Differential Design Reduces RF Rectification
and Eliminates Bypass Capacitor
z Improved CMRR Eliminates Two Input
Coupling Capacitors
z Internally Generated 250-kHz Switching Frequency
z Integrated Pop and Click Suppression Circuitry
z 1.5mm u 1.5mm Wafer Chip Scale Package (WCSP)
and 3mm u 3mm DFN-8 package
z 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
Package Type
UDFN-8
kBA2338-WCSP
WCSP-9
Marking
xxxx
A20 5
Operating Temperature range
-40 °C to 85°C
-40 °C to 85°C
March 2007
1
1 page  
Kingbor Technology Co.,Ltd
TEL:(86)0755-26508846 FAX:(86)0755-26509052
www.DataSheet4U.com
Electrical Characteristics
(Limits apply for TA = +25°C unless otherwise noted) (WCSP)
Characteristic
Symbol
Conditions
Efficiency
ï RL = 8.0 W, f = 1.0 kHz
Vp = 5.0 V, Pout = 1.2 W
Vp = 3.6 V, Pout = 0.6 W
RL = 4.0 W, f = 1.0 kHz
Vp = 5.0 V, Pout = 2.0 W
Vp = 3.6 V, Pout = 1.0 W
Total Harmonic Distortion + Noise
THD+N
Vp = 5.0 V, RL = 8.0 W,
f = 1.0 kHz, Pout = 0.25 W
Vp = 3.6 V, RL = 8.0 W,
f = 1.0 kHz, Pout = 0.25 W
Common Mode Rejection Ratio
CMRR
Vp from 2.5 V to 5.5 V
Vic = 0.5 V to Vp ï 0.8 V
Vp = 3.6 V, Vic = 1.0 Vpp
f = 217 Hz
f = 1.0 kHz
Power Supply Rejection Ratio
PSRR
Vp_ripple_pkïpk = 200 mV, RL = 8.0 W,
Inputs AC Grounded
Vp = 3.6 V
f = 217 kHz
f = 1.0 kHz
KBA2338
Min Typ Max Unit
%
ï 91 ï
ï 90 ï
ï 82 ï
ï 81 ï
ï 0.05 ï
ï 0.09 ï
ï ï62 ï
ï ï56 ï
ï ï57 ï
%
dB
dB
ï ï62 ï
ï ï65 ï
Electrical Characteristics
(Limits apply for TA = +25°C unless otherwise noted) (UDFN)
Characteristic
Symbol
Conditions
Operating Supply Voltage
Supply Quiescent Current
Shutdown Current
Shutdown Voltage High
Shutdown Voltage Low
Switching Frequency
Gain
Vp
Idd
Isd
Vsdih
Vsdil
Fsw
G
TA = ï40°C to +85°C
Vp = 3.6 V, RL = 8.0 W
Vp = 5.5 V, No Load
Vp from 2.5 V to 5.5 V, No Load
TA = ï40°C to +85°C
Vp = 4.2 V
TA = +25°C
TA = +85°C
Vp = 5.5 V
TA = +25°C
TA = +85°C
-
-
Vp from 2.5 V to 5.5 V
TA = ï40°C to +85°C
RL = 8.0 W
Output Impedance in Shutdown Mode
Resistance from SD to GND
Output Offset Voltage
Turn On Time
Turn Off Time
Thermal Shutdown Temperature
Output Noise Voltage
ZSD
Rs
Vos
Ton
Toff
Tsd
Vn
-
ï
Vp = 5.5 V
Vp from 2.5 V to 5.5 V
Vp from 2.5 V to 5.5 V
ï
Vp = 3.6 V, f = 20 Hz to 20 kHz
no weighting filter
with A weighting filter
Min Typ Max Unit
2.5 ï 6.0 V
ï 2.15 ï
ï 2.61 ï
mA
ï ï 3.8
mA
ï
0.42
0.8
ï
0.45
2.0
mA
ï 0.8 1.5
ï 0.9 ï
1.2 ï ï V
ï ï 0.4 V
180 240 300 kHz
285 kW
Ri
ï
ï
ï
ï
ï
ï
300 kW
Ri
20
300
6.0
1.0
1.0
160
315 kW
Ri
ï
ï
ï
ï
ï
ï
ï 65 ï
ï 42 ï
V
V
kW
kW
mV
ms
ms
°C
mVrms
March 2007
5
5 Page 
Kingbor Technology Co.,Ltd
TEL:(86)0755-26508846 FAX:(86)0755-26509052
www.DataSheet4U.com
TYPICAL PERFORMANCE CHARACTERISTICS
KBA2338
2.0
RL = 8 W
f = 1 kHz
1.5
kBA2338 mDFN
THD+N = 10%
kBA2338 WCSP
1.0 THD+N = 10%
0.5
0
2.5
kBA2338 WCSP
THD+N = 1%
kBA2338 mDFN
THD+N = 3%
3.0 3.5 4.0 4.5
POWER SUPPLY (V)
5.0
Figure 21. Output Power vs. Power Supply
RL = 8 W @ f = 1 kHz
10
3.0
RL = 4 W
2.5 f = 1 kHz
2.0 THD+N = 10%
1.5
1.0 THD+N = 1%
0.5
0
2.5 3.0 3.5 4.0 4.5 5.0
POWER SUPPLY (V)
Figure 22. Output Power vs. Power Supply
RL = 4 W @ f = 1 kHz
10
1.0
Vp = 2.5 V
Vp = 3.6 V
0.1
Vp = 5 V
1.0
Vp = 2.5 V Vp = 3.6 V
0.1
Vp = 5 V
0.0110
ï20
100
1000
10000
FREQUENCY (Hz)
100000 0.0110
Figure 23. THD+N vs. Frequency
RL = 8 W, Pout = 250 mW @ f = 1 kHz
ï20
100
1000
10000
FREQUENCY (Hz)
100000
Figure 24. THD+N vs. Frequency
RL = 4 W, Pout = 250 mW @ f = 1 kHz
ï30 ï30
ï40
ï50 Vp = 5 V
ï40
ï50 Vp = 5 V
ï60 Vp = 3.6 V
ï60 Vp = 3.6 V
ï70
ï8010
Inputs to GND
RL = 8 W
100
1000
10000
FREQUENCY (Hz)
100000
Figure 25. PSRR vs. Frequency
Inputs Grounded, RL = 8 W, Vripple = 200 mvpkpk
ï70
ï8010
Inputs to GND
RL = 4 W
100
1000
10000
FREQUENCY (Hz)
100000
Figure 26. PSRR vs. Frequency
Inputs grounded, RL = 4 W, Vripple = 200 mVpkpk
March 2007
11
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| Páginas | Total 16 Páginas | |
| PDF Descargar | [ Datasheet KBA2338.PDF ] | |
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