POWER AMPLIFIER. AP4890B Datasheet

AP4890B AMPLIFIER. Datasheet pdf. Equivalent

Part AP4890B
Description 1W AUDIO POWER AMPLIFIER
Feature INTEGRATED CIRCUITS INC.--- AP4890B AP4890B --- 1W AUDIO POWER AMPLIFIER 1. DESCRIPTION : The AP4890.
Manufacture APLUS
Datasheet
Download AP4890B Datasheet



AP4890B
INTEGRATED CIRCUITS INC.--- AP4890B
AP4890B --- 1W AUDIO POWER AMPLIFIER
1. DESCRIPTION :
The AP4890B is an audio power amplifier designed for portable communication device
applications such as mobile phone applications. The AP4890B is capable of delivering
1W of continuous average power to an 8BTL and with less than 1% distortion
(THD+N) from a 5.0V power supply, and 350mW to a 8BTL load from a 3V power supply.
The AP4890B provides high quality audio while requiring few extemal components and
minimal power consumption. It features a low-power shutdown mode, which is achieved
by driving the SHUTDOWN pin with logic low.
The AP4890B contains circuitry to prevent from “pop and click” noise that would otherwise
occur during turn-on and turn-off transitions.For maximum flexibility, the AP4890B provides
an externally controlled gain (with resistors), as well as an externally controlled turn-on and
turn-off times (with the bypass capacitor).
2. FEATURE :
ƒ 2.5-5.2V operation
ƒ 65dB PSRR at 217Hz, VDD=5V
ƒ 0.1µA ultra low current shutdown mode
ƒ Improved pop & click circuitry
ƒ No output coupling capacitors, snubber networks or bootstrap capacitors required
ƒ Thermal shutdown protection
ƒ External gain configuration capability
ƒ RoHS compliant and 100% lead(Pb)-free
ƒ APPLICATIONS
ƒ Mobile Phones
ƒ PDAs
ƒ Portable electronic devices
http://www.aplusinc.com.tw
Page 1 / 15
Tel : 886-2-2782-9266 Ver1.2



AP4890B
INTEGRATED CIRCUITS INC.--- AP4890B
3. PIN CONFIGURATION (Top View) :
]
4. PIN DESCRIPTION :
PIN PIN I/O
DESCRIPTION
SHUT
DOWN-B
BYPASS
+IN
-IN
VO1
VDD
1
2
3
4
5
6
I
The device enters in shutdown mode when a low level
is applied on this pin
I
Bypass capacitor pin which provides the
common mode voltage
I
Positive input of the first amplifier, receives the
common mode voltage
Negative input of the first amplifier, receives the audio
I input signal. Connected to the feedback resistor Rf
and to the input resistor Rin.
O
Negative output of the AP4890B. Connected to the load
and to the feedback resistor Rf
I Analog VDD input supply.
GND
7
Ground connection for circuitry.
VO2
8O
Positive output of the AP4890B.
http://www.aplusinc.com.tw
Page 2 / 15
Tel : 886-2-2782-9266 Ver1.2





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