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Richiek - 2.65W PWM Class-D Power Amplifier

Numéro de référence RT9101
Description 2.65W PWM Class-D Power Amplifier
Fabricant Richiek 
Logo Richiek 





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RT9101 fiche technique
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

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