Pam8001, Application information – Diodes PAM8001 User Manual
Page 11
PAM8001
Document number: DSxxxxx Rev. 1 - 0
11 of 17
February 2013
© Diodes Incorporated
PAM8001
A Product Line of
Diodes Incorporated
Application Information
(cont.)
Variable Description
Typical
Value
Unit
VPL
Voltage for power limit voltage, Setting by external resistor divider
0.4 to 1.2
V
Gain Range
Adjustable gain range of power limit and anti-saturation function
75
dB
Gain Step Size
Gain step size for adjustable power limit and anti-saturation function
Note 2
dB
Attack Time (per step)
The minimum time between two gain decrements. (per step)
32
µS
Release Time (per step)
The minimum time between two gain increments. (per step)
250
mS
Note:
2. Please contact Diodes for detail information.
Anti-Saturation Function
If the preset gain is higher than power set, anti-saturation is active be detecting the duty cycle of the PWM output. When the mode has been
detected, the gain is automatically adjusted to the value that the output is not clip step by step. The attach is immediate and the release time is
250mS per step.
MUTE Operation
The MUTE pin is an input for controlling the output state of the PAM8001. A logic low on this pin disables the outputs, and a logic high on this
pin enables the outputs. This pin may be used as a quick disable or enable of the outputs without a volume fade. Quiescent current is listed in
the electrical characteristic table. The MUTE pin can be left floating due to the internal pull-up
Shutdown Operation
In order to reduce power consumption while not in use, the PAM8001 contains shutdown circuitry to turn off amplifier’s bias circuitry. The
amplifier is turned off when logic low is placed on the SHDN pin. By switching the SHDN pin connected to GND, the PAM8001 supply current
draw will be minimized in idle mode. The SHDN pin can be left floating due to the internal pull-up.