PT2300 데이터 시트보기 (PDF) - Princeton Technology
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PT2300 Datasheet PDF : 15 Pages
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2W x 2 Class AB Audio Power Amplifier
Tel: 886-2-66296288
Fax: 886-2-29174598
URL: http://www.princeton.com.tw
PT2300
FUNCTION DESCRIPTION
POWER SUPPLY
The operating voltage of PT2300 is from 3V to 6V, In general operation 5V is recommended. When the
supply voltage less then 3V the IC can work properly, but the distortion reading will rise. After the
supply voltage over 6.5V, the higher stand-by current consumption will rising the temperature on chip
surface。
SHUTDOWN
When the DC supply still powered the chip Vcc, pull-up the shutdown pin to the Vcc level will take the
chip into the shutdown mode. After the shutdown mode is active the total current consumption is less
than 0.7µA, and the all of input or output pins no voltage output. When shutdown pin set to GND, the IC
is back to the normal operation.
Shutdown pin
Vcc
GND
Output state
Shutdown ON
Normal
INPUT GAIN ADJUST
The output gain of the PT2300 can be adjust by the external resistor, in normal operation 0dB gain
setting is recommended, please refer to the application circuit. If the source output level is not so high
(ex :< 2Vpp), input gain can be increase to get the proper volume. The minimum value of the input
series resistance is 10KΩ for the modest input impedance.
To make sure the input stage will not be distortion by overload, please confirm the input signal level, for
the gain set please refer to the following table:
Operating voltage Input gain = –6dB Input gain = 0dB Input gain = +6dB
VDD=3V
Vin <5Vpp
Vin <2.5Vpp
Vin <1.25Vpp
VDD=5V
Vin <8Vpp
Vin<4Vpp
Vin<2Vpp
SE/BTL MODE SWITCHING
PT2300 have two output mode, SE (Single-Ended) or BTL (Bridge-Tied Load). When driving a speaker
load suggestion set to the BTL mode for get the more power output. And driving a headphone load, it
can be set to SE mode and turn-off the un-work amplifier to decrease stand-by power consumption.
Switching between the SE/BTL modes is controlled by the SE/BTL pin, please refer to following table:
SE/BTL
Vcc
GND
Mode
SE
BTL
PT2300 V1.0
-4-
December, 2005
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