Document
A Product Line of Diodes Incorporated
PAM8001
ANTI-SATURATION FILTERLESS 2W CLASS-D STEREO AMPLIFIER WITH DC VOLUME CONTROL AND MAX OUTPUT POWER SETTING
Description
The PAM8001 is a 2W, class-D audio amplifier. Advanced 64-step DC volume control minimizes external components and allows speaker volume control. PAM unique anti-saturation technology which detects output signal clip due to the over level input signal suppress the output signal clip automatically. Also control the gain for set max power. It can protect low wattage speaker from overdrive damage even same platform with high wattage model. It offers low THD+N, to produce high-quality sound reproduction. The new filterless architecture allows the device to drive the speaker directly, without low-pass output filters which will save system cost and PCB area.
With the same numbers of external components, the efficiency of the PAM8001 is much better than class-AB cousins. It can extend the battery life thus be ideal for portable applications.
The PAM8001 is available in SSOP-24L and QFN3*3-20L package.
Pin Assignments
Features
2W Output at 1% THD with a 4Ω Load at 5V Power Supply Filterless, Low Quiescent Current and Low EMI Low THD+N 64-Step DC Volume Control Unique Anti-Saturation Function Adjustable Max Output Power with No Clipping Superior Low Noise Low Pop Noise Efficiency up to 90% Short Circuit Protection Thermal Shutdown Few External Components to Save the Space and Cost Pb-Free Package
Applications
LCD Monitors / TV Projectors Notebook Computers Portable Speakers Portable DVD Players, Game Machines VoIP/Speaker Phones All In One Computer /TV
PAM8001
Document number: DSxxxxx Rev. 1 - 0
1 of 17 www.diodes.com
February 2013
© Diodes Incorporated
Typical Applications Circuit
A Product Line of Diodes Incorporated
PAM8001
Pin Descriptions
Pin Number
QFN3x3
SSOP
Pin Name
1 4 -OUT_L
2 5 PVDDL
3 6 MUTE
4 7 VDD
58
INL
6 10 VDC
7 11 VOLUME
8 12 ANTI
9 14 VDD/2
10 15
VPL
11 16 VREF
12 17
INR
13 18
GND
14 19 SHDN
15 20 PVDDR
16 21 -OUT_R
17
22/23
PGNDR
18 24 +OUT_R
19 1 +OUT_L
20 2/3 PGNDL
9/13 NC
PAM8001
Document number: DSxxxxx Rev. 1 - 0
Function
Left Channel Negative Output
Left Channel Power Supply
Mute Control Input (active low)
Analog VDD
Left Channel Input
Analog Reference for Gain Control Selection
DC Volume Control to Set the Gain of Class-D
Anti-Saturation On/Off Control
Internal Common Mode Voltage, Connect a Bypass Capacitior form This Pin to GND
Maximum Output Power Setting Voltage
Reference Voltage Out for VPL
Right Channel Input
Analog Ground
Shutdown Control Input (active low)
Right Channel Power Supply
Right Channel Negative Output
Right Channel Power GND
Right Channel Positive Output
Left Channel Positive Output
Left Channel Power GND
No Connection
2 of 17 www.diodes.com
February 2013
© Diodes Incorporated
Functional Block Diagram
A Product Line of Diodes Incorporated
PAM8.