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RT9101 Datasheet Preview

RT9101 Datasheet

2.65W PWM Class-D Power Amplifier

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RT9101
2.65W PWM Class-D Power Amplifier
General Description
The RT9101 is a 2.65W, high efficiency Class-D audio
amplifier featuring low-resistance internal power MOSFETs
and the gain can be set by an external input resistance.
The filter free topology eliminates the output filter and
reduces the external component count, footprint area, and
system costs.
Operating from a single 5V supply, the RT9101 is capable
of driving 4Ω speaker load at a continuous average output
of 2.65W/10% THD+N or 2W/0.5% THD+N. The RT9101
has a higher efficiency with speaker load compared to a
typical class AB amplifier. With a 3.6V supply driving an
8Ω speaker, the efficiency for a 400mW power level is
88%.
It is very suitable for power sensitive application, such as
cellular handsets and battery powered devices. In addition
to these features, the RT9101 provides a fast startup time
to minimize audible popping during device turn-on and turn-
off. Moreover, the RT9101 also integrates thermal and over
current protection circuits.
The RT9101 is available in WDFN-8L 3x3, and
WL-CSP-9B 1.45x1.45 (BSC) packages.
Ordering Information
RT9101 ( )
Package Type
QW : WDFN-8L 3x3 (W-Type)
WSC : WL-CSP-9B 1.45x1.45 (BSC)
Lead Plating System
G : Green (Halogen Free and Pb Free)
Z : ECO (Ecological Element with
Halogen Free and Pb free)
Default : WDFN-8L 3x3
C : WL-CSP-9B 1.45x1.45 (BSC)
Note :
Richtek products are :
` RoHS compliant and compatible with the current require-
ments of IPC/JEDEC J-STD-020.
` Suitable for use in SnPb or Pb-free soldering processes.
Features
z Wide Operating Voltage : 2.5V to 5.5V
z High Efficiency With an 8Ω Speaker :
` 88% at 400mW
` 80% at 100mW
z Low Quiescent Current and Shutdown Current
z Optimized PWM Output Stage Eliminates LC Filter
z Fully Differential Design Reduces RF Rectification
and Eliminates Bypass Capacitor
z Internally Generated 250kHz Switching Frequency
z Integrated Pop and Click Suppression Circuitry
z RoHS Compliant and Halogen Free
Applications
z Mobile Phones
z Handsets
z PDAs
z Portable multimedia devices
Pin Configurations
(TOP VIEW)
SHDN 1
NC 2
INP 3
INN 4
8 OUTN
7 GND
6 VDD
9 5 OUTP
WDFN-8L 3x3
INP A1 A2 A3 OUTN
VDD B1 B2 B3 GND
VDD
INN C1 C2 C3 OUTP
WL-CSP-9B 1.45x1.45 (BSC)
DS9101-01 April 2011
www.richtek.com
1




Richiek

RT9101 Datasheet Preview

RT9101 Datasheet

2.65W PWM Class-D Power Amplifier

No Preview Available !

RT9101
Marking Information
RT9101GQW
FL= : Product Code
FL=YM
DNN
YMDNN : Date Code
RT9101ZQW
FL YM
DNN
FL : Product Code
YMDNN : Date Code
RT9101CWSC
21 : Product Code
21W
W : Date Code
Typical Application Circuit
Audio Input
from DAC
CI
2.2µF
RI
150k
CI
2.2µF
RI
150k
RT9101
SHDN
OUTN
INP OUTP
VDD
INN GND
RL
CS
1µF
Figure 1. Application Circuit with Differential Input
Audio Input
CI
2.2µF
RI
150k
CI
2.2µF
RI
150k
RT9101
SHDN
OUTN
INP OUTP
VDD
INN GND
RL
CS
1µF
Figure 2. Application Circuit with Single-Ended Input
www.richtek.com
2
DS9101-01 April 2011


Part Number RT9101
Description 2.65W PWM Class-D Power Amplifier
Maker Richiek
PDF Download

RT9101 Datasheet PDF






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