NCP4894
Product Preview
1.0 Watt Differential Audio
Power Amplifier with
Selectable Shutdown
The NCP4894 is a differential audio power amplifier designed for
portable communication device applications. This feature and the
excellent audio characteristics of the NCP4894 are a guarantee of a
high quality sound, for example, in mobile phones applications. With
less than 0.01% distortion (THD + N), the NCP4894 is capable of
delivering 1.0 W of continuous average power to an 8.0
W
load from
a 5.0 V power and still 250 mW from 2.6 V.
The NCP4894 provides high quality audio while requiring few
external components and minimal power consumption. It features a
low鈭抪ower consumption shutdown mode.
To be flexible, shutdown may be enabled by either a logic high or
low depending on the voltage applied on the SD MODE pin.
The NCP4894 contains circuitry to prevent from 蘆 pop and click 祿
noise that would otherwise occur during turn鈭抩n and turn鈭抩ff
transitions.
For maximum flexibility, the NCP4894 provides an externally
controlled gain (with resistors), as well as an externally controlled
turn鈭抩n time (with bypass capacitor).
Due to its excellent PSRR, it can be directly connected to the
battery, saving the use of an LDO.
This device is available in 9鈭扨in Flip鈭扖hip CSP and Micro鈭?0
packages.
Features
http://onsemi.com
MARKING
DIAGRAMS
9鈭扨in Flip鈭扖hip CSP
FC SUFFIX
CASE 499E
xxx
YYWW
A1
Micro鈭?0
DM SUFFIX
CASE 846B
1
xxx
YY, Y
WW, W
A
WL
= Specific Device Code
= Year
= Work Week
= Assembly Location
= Wafer Lot
xxxx
YWW
AWL
1
8
PIN CONNECTIONS
9鈭扨in Flip鈭扖hip CSP
A1
INP
B1
VP
C1
INM
A2
BYPASS
B2
SD MODE
C2
A3
OUTB
B3
VM
C3
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Differential Amplification
Shutdown High or Low Selectivity
1.0 W to an 8.0
W
Load from a 5.0 V Power Supply
Superior PSRR: Direct Connection to the Battery
蘆 Pop and Click 祿 Noise Protection Circuit
Ultra Low Current Shutdown Mode
2.2 V鈭?.5 V Operation
External Gain Configuration Capability
External Turn鈭抩n Configuration Capability
Thermal Overload Protection Circuitry
Pb鈭扚ree Packages are Available
SD SELECT OUTA
(Top View)
Typical Applications
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Portable Electronic Devices
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PDAs
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Mobile Phones
Micro鈭?0
SD SELECT
INM
SD MODE
INP
BYPASS
1
2
3
4
5
(Top View)
10 OUTA
9
8
7
6
VP
NC
VM
OUTB
ORDERING INFORMATION
This document contains information on a product under development. ON Semiconductor
reserves the right to change or discontinue this product without notice.
漏
Semiconductor Components Industries, LLC, 2004
See detailed ordering and shipping information in the package
dimensions section on page 13 of this data sheet.
1
February, 2004 鈭?Rev. 2
Publication Order Number:
NCP4894/D
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