RT9131CS

Manufacturer Part NumberRT9131CS
ManufacturerRichtek Technology Corporation
RT9131CS datasheet
 


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Class AB Stereo Headphone Drive with Mute
General Description
The RT9131 is an integrated class AB stereo
headphone driver contained in a SOP-8 or DIP-8
plastic package with Mute feature. A class AB output
stage bias control circuit is employed to maintain low
audio signal distortion and power consumption. The
RT9131 further integrates a voltage divider inside
the chip. Thus, the external resistors can be
eliminated. The device is fabricated in a CMOS
process and has been primarily developed for
portable digital audio applications.
Ordering Information
RT9131
PackageType
N : DIP-8
S : SOP-8
Operating Tmperature Rnge
C: Commercial Standard
Marking Information
Part Number
Marking
RT9131CN
RT9131CN
RT9131CS
RT9131CS
Typical Application Circuit
V
MUTE
H: Speaker Action
L: Mute On
V
INA
DS9131-01 November 2002
Preliminary
Features
Applications
Pin Configurations
R1
1
OUTA
VDD
100K
2
MUTE
OUTB
C2
RT9131
3
INA
BIAS
2.2µF
C4
4
GND
INB
1µF
V
INB
C3
High Signal-to-Noise Ratio
High Slew Rate
Low Distortion
Large Output Voltage Swing
Flexible Mute Function
Excellent Power Supply Ripple Rejection
Low Power Consumption
Short-circuit Elimination
Wide Temperature Range
No Switch ON/OFF Clicks
Integrated Voltage Divider (V
External Resistors
Portable Digital Audio
Part Number
Pin Configurations
TOP VIEW
RT9131CN
(Plastic DIP-8)
OUTA
1
MUTE
2
INA
3
RT9131CS
(Plastic SOP-8)
4
GND
C7
220µF
C6
220µF
8
7
6
V
DD
+ C5
C1
5
+
4.7µF
100µF
2.2µF
RT9131
/2) to Eliminate
DD
VDD
8
7
OUTB
BIAS
6
INB
5
www.richtek.com.tw
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RT9131CS Summary of contents