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Advanced Product Information
PAM8101/8201
Tiny 1.2 Watt Class-D Audio Amplifiers Description
The PAM8101 is a 1.2 Watt, 5-pin, single channel, class D audio amplifier. The PAM8201 is a 1.2 Watt per channel, 8-pin, dual channel, class D audio amplifier. The PAM8101 and PAM8201 require very few external components, which leads to lower total system costs as well as less board space. These amplifiers supply 1.2 Watts per channel into a 8 speaker at much higher efficiencies than their class A/B cousins. They also offer low THD+N (0.10%), allowing them to produce high-quality sound reproduction. The PAM8101 is available in a SOT25 package, which is a tiny 2mm by 3mm. This small package, combined with the low external component count (as few as two tiny capacitors), results in significant board space savings. The PAM8201 is available in a small 8-pin SOP package, and requires as few as three tiny capacitors for a complete class-D solution. As with the PAM8101, this small package, combined with the low external component count, results in significant board space savings. The PAM8101 and PAM8201 both run off of a 5 Volt supply, making them ideal for many portable applications.
Power Analog Microelectronics, Inc. CONFIDENTIAL. DO NOT DISTRIBUTE OR REPRODUCE WITHOUT PERMISSION FROM P.A.M. PAM8101/8201 Rev. 1.4 August 2005
Features
* * * * * * * * * * 1.2 Watts @ 10% THD per channel output into a 8 load at 5V Support speakers or earphone (6 t 32). 32 Superior low noise without signal input. Supply voltage: From 2.5V to 6 V. 85% efficiency above. Short Circuit Protection. Tiny package outlines: SOT25 (PAM8101) and SOP-8 (PAM8201) Less output capacitor and inductor to save the space and cost. Low THD+N Low Quiescent current: Below 10mA
Applications
* * * * * * * * Notebook computers PDAs Portable DVD players Cellular phones/speaker phones. MP3 or PMP players. Portable speakers. USB speaker. LCD monitor / TV.
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Advanced Product Information
PAM8101 Block Diagram
C1 Input Signal 1uF 1 Bit Speaker
THD+N vs. Output Power
(8 Ohms, 1 kHz, Vdd=2.5V to 6V)
Audio Precision
100
06/08/05 16:01:55
Controller
Over Current Vdd C2 1uF
50
20 10
PAM8101 Pin Assignment
Vdd 1 GND 2 IN 3 4 5
5
2
- OUT + OUT
%
1 0.5
0.2 0.1 0.05
0.02 0.01 1m
PAM8201 Block Diagram
Vdd
2m
5m
10m
20m
50m W
100m
200m
500m
1
2
3
With an 8-ohm load:
C1 Input Signal Left 1uF
1
Bit Left Speaker
Vdd: Output Watt:
2.5V 0.3W
4.0V 0.8W
5.0V 1.2W
6.0V 1.7W
Controller
Ov er Current
C2 Input Signal Right 1uF Vdd C3 1uF
1
Bit Right Speaker
Controller
Efficiency vs. Output power
(8 Ohms, 1kHz, Vdd = 5V)
Ov er Current
100.0 90.0
PAM8201 Pin Assignment
IN _ L IN _ R GND + OUT _ R 1 2 3 4 8 + OUT _ L 7 - OUT _ L 6 Vdd 5 - OUT _ R
efficiency (%)
80.0 70.0 60.0 50.0 40.0 30.0 20.0 10.0 0.0 0 0.1 0.2 0.3 0.4 0.5 0.6 0.7 0.8 0.9 1 Output power (W)
Power Analog Microelectronics, Inc. CONFIDENTIAL. DO NOT DISTRIBUTE OR REPRODUCE WITHOUT PERMISSION FROM P.A.M.
PAM8101/8201 Rev. 1.4 August 2005
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Advanced Product Information
Package Description PAM8101
A1
A2
A
b
E1
E
c
L
L1
e e1 D
e
L A1 A2 c D E E1 0.70 L1 b e e1 0
Note: Package outline exclusive of mold flash and metal burr.
Power Analog Microelectronics, Inc. CONFIDENTIAL. DO NOT DISTRIBUTE OR REPRODUCE WITHOUT PERMISSION FROM P.A.M.
PAM8101/8201 Rev. 1.4 August 2005
3
Advanced Product Information
Package Description PAM8201
Note: Package outline exclusive of mold flash and metal burr.
Power Analog Microelectronics, Inc. CONFIDENTIAL. DO NOT DISTRIBUTE OR REPRODUCE WITHOUT PERMISSION FROM P.A.M.
PAM8101/8201 Rev. 1.4 August 2005
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