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PDF STH4010 Data sheet ( Hoja de datos )
| Número de pieza | STH4010 | |
| Descripción | 2.5-W MONO FILTER-FREE CLASS-D AUDIO POWER AMPLIFIER | |
| Fabricantes | Sitch Semiconductors | |
| Logotipo |  |
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Hay una vista previa y un enlace de descarga de STH4010 (archivo pdf) en la parte inferior de esta página. Total 22 Páginas | ||
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STH4010
2.5-W MONO FILTER-FREE CLASS-D AUDIO POWER AMPLIFIER
JULY 2006
FEATURES
• Maximum Battery Life and Minimum Heat
– Efficiency With an 8-Ω Speaker:
• 88% at 400 mW
• 80% at 100 mW
– 2.8-mA Quiescent Current
– 0.5-µA Shutdown Current
• Only Three External Components
– Optimized PWM Output Stage Eliminates
LC Output Filter
– Internally Generated 250-kHz Switching
Frequency Eliminates Capacitor and
Resistor
– Improved PSRR (–75 dB) and Wide Supply
Voltage (2.5 V to 5.5 V) Eliminates Need for
a Voltage Regulator
– Fully Differential Design Reduces RF
Rectification and Eliminates Bypass
Capacitor
– Improved CMRR Eliminates Two Input
Coupling Capacitors
• Wafer Chip Scale Packaging (WCSP)
– NanoFree™ Lead-Free (YZF)
– NanoStar™ SnPb (YEF)
APPLICATIONS
• Ideal for Wireless or Cellular Handsets and
PDAs
DESCRIPTION
The STH4010 is a 2.5-W high efficiency filter-free
class-D audio power amplifier (class-D amp) in a
1,45 mm × 1,45 mm wafer chip scale package
(WCSP) that requires only three external
components.
Features like 88% efficiency, –75-dB PSRR,
improved RF-rectification immunity, and 8 mm2 total
PCB area make the STH4010 class-D
amp ideal for cellular handsets. A fast start-up time
of 1 ms with minimal pop makes the STH4010
ideal for PDA applications.
In cellular handsets, the earpiece, speaker phone,
and melody ringer can each be driven by the
STH4010. The STH4010 allows independent
gain while summing signals from seperate sources,
and has a low 36 µV noise floor, A-weighted.
APPLICATION CIRCUIT
+ RI
Differential
Input
- RI
SHUTDOWN
Internal
Oscillator
To Battery
VDD
CS
IN-
_
+
PWM
H-
Bridge
VO+
VO-
IN+
Bias
Circuitry
GND
TPA2010D1
9-BALL
WAFER CHIP SCALE
YZF, YEF PACKAGES
STH4010 DIMENSIONS
(TOP VIEW OF PCB)
IN+ GND VO-
A1 A2
A3
1,55 mm
VDD
PVDD
GND
1,40 mm B1 B2
B3
IN- SHUTDOWN VO+
C1 C2
C3
1,55 mm
1,40 mm
Note: Pin A1 is marked with a “0” for
Pb-free (YZF) and a “1” for SnPb (YEF).
Please be aware that an important notice concerning availability, standard warranty, and use in critical applications of Texas
Instruments semiconductor products and disclaimers thereto appears at the end of this data sheet.
NanoFree, NanoStar are trademarks of Texas Instruments.
PRODUCTION DATA information is current as of publication date.
Products conform to specifications per the terms of the Texas
Instruments standard warranty. Production processing does not
necessarily include testing of all parameters.
1 page  
TABLE OF GRAPHS
TYPICAL CHARACTERISTICS
Efficiency
vs Output power
PD Power dissipation
Supply current
vs Output power
vs Output power
I(Q) Quiescent current
I(SD) Shutdown current
PO Output power
vs Supply voltage
vs Shutdown voltage
vs Supply voltage
vs Load resistance
vs Output power
THD+N Total harmonic distortion plus noise vs Frequency
vs Common-mode input voltage
KSVR
Supply voltage rejection ratio
GSM power supply rejection
vs Frequency
vs Time
vs Frequency
KSVR Supply voltage rejection ratio
CMRR Common-mode rejection ratio
vs Common-mode input voltage
vs Frequency
vs Common-mode input voltage
TEST SET-UP FOR GRAPHS
+
Measurement
Output
-
CI RI
CI RI
STH4010
IN+ OUT+
IN-
VDD
OUT-
GND
Load
30 kHz
Low Pass
Filter
STH4010
JULY 2006
FIGURE
1, 2
3, 4
5, 6
7
8
9
10, 11
12, 13
14, 15, 16, 17
18
19, 20, 21
22
23
24
25
26
+
Measurement
Input
-
+
VDD
-
1 µF
Notes:
(1) CI was Shorted for any Common-Mode input voltage measurement
(2) A 33-µH inductor was placed in series with the load resistor to emulate a small speaker for efficiency measurements.
(3) The 30-kHz low-pass filter is required even if the analyzer has an internal low-pass filter. An RC low pass filter (100 Ω, 47 nF) is
used on each output for the data sheet graphs.
5
5 Page 
STH4010
JULY 2006
Differential
Input
CI RI IN-
CI RI IN+
Internal
Oscillator
VDD
_
PWM
H- VO+
Bridge
+ VO-
SHUTDOWN
Bias
Circuitry
GND
STH4010
Filter-Free Class D
To Battery
CS
Figure 28. STH4010 Application Schematic With Differential Input and Input Capacitors
Single-ended CI RI
Input
RI
CI
SHUTDOWN
Internal
Oscillator
VDD
IN-
_
+
IN+
PWM
H-
Bridge
VO+
VO-
Bias
Circuitry
GND
STH4010
Filter-Free Class D
To Battery
CS
Figure 29. STH4010 Application Schematic With Single-Ended Input
SUMMING INPUT SIGNALS WITH THE STH4010
Most wireless phones or PDAs need to sum signals at the audio power amplifier or just have two signal sources
that need separate gain. The STH4010 makes it easy to sum signals or use separate signal sources with
different gains. Many phones now use the same speaker for the earpiece and ringer, where the wireless phone
would require a much lower gain for the phone earpiece than for the ringer. PDAs and phones that have stereo
headphones require summing of the right and left channels to output the stereo signal to the mono speaker.
Summing Two Differential Input Signals
Two extra resistors are needed for summing differential signals (a total of 5 components). The gain for each
input source can be set independently (see Equation 4 and Equation 5, and Figure 30).
ǒ ǓGain
1
+
VO
VI1
+
2
x
150
RI1
kW
V
V
(4)
ǒ ǓGain
2
+
VO
VI2
+
2
x
150
RI2
kW
V
V
(5)
If summing left and right inputs with a gain of 1 V/V, use RI1 = RI2 = 300 kΩ.
11
11 Page | ||
| Páginas | Total 22 Páginas | |
| PDF Descargar | [ Datasheet STH4010.PDF ] | |
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