NCP4894
1.8 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
a 10% THD+N value the NCP4894 is capable of delivering 1.8 W of
continuous average power to an 8.0
W
load from a 5.5 V power
supply. With the same load conditions and a 5.0 V battery voltage, it
ensures 1.0 W to be delivered with less than 0.01% distortion.
The NCP4894 provides high quality audio while requiring few
external components and minimal power consumption. It features a
low−power 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 “pop and click”
noise that would otherwise occur during turn−on and turn−off
transitions.
For maximum flexibility, the NCP4894 provides an externally
controlled gain (with resistors), as well as an externally controlled
turn−on 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−Pin Flip−Chip, Micro−10 and DFN10
3x3 mm packages.
Features
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MARKING
DIAGRAMS
9−PIN FLIP−CHIP
FC SUFFIX
CASE 499AL
A3
1
xxxG
AYWW
C1
A1
8
1
Micro−10
DM SUFFIX
CASE 846B
xxxx
AYWG
G
DFN10
MN SUFFIX
CASE 485C
1
1
xxx
ALYWG
G
•
•
•
•
•
•
•
•
•
•
•
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
“Pop and Click” Noise Protection Circuit
Ultra Low Current Shutdown Mode
2.2 V−5.5 V Operation
External Gain Configuration Capability
External Turn−on Configuration Capability
Thermal Overload Protection Circuitry
Pb−Free Packages are Available
xxxx
= Specific Device Code
A
= Assembly Location
L
= Wafer Lot
Y
= Year
W, WW = Work Week
G
= Pb−Free Package
(Note: Microdot may be in either location)
ORDERING INFORMATION
See detailed ordering and shipping information in the package
dimensions section on page 15 of this data sheet.
Typical Applications
•
Portable Electronic Devices
•
PDAs
•
Mobile Phones
©
Semiconductor Components Industries, LLC, 2007
1
January, 2007 − Rev. 9
Publication Order Number:
NCP4894/D
NCP4894
MAXIMUM RATINGS
(Note 2)
Rating
Supply Voltage
Operating Supply Voltage
Input Voltage
Max Output Current
Power Dissipation (Note 3)
Operating Ambient Temperature
Max Junction Temperature
Storage Temperature Range
Thermal Resistance Junction−to−Air
Micro−10
DFN 3x3 mm
9−Pin Flip−Chip
Symbol
VP
Op VP
V
in
Iout
Pd
T
A
T
J
T
stg
R
qJA
Value
6.0
2.2 to 5.5 V
−0.3 to Vcc +0.3
500
Internally Limited
−40 to +85
150
−65 to +150
200
70
(Note 4)
> 2000
> 200
100
mA
Unit
V
−
V
mA
−
°C
°C
°C
°C/W
ESD Protection
Human Body Model (HBM) (Note 5)
Machine Model (MM) (Note 6)
−
−
V
Latchup Current at T
A
= 85°C (Note 7)
Stresses exceeding Maximum Ratings may damage the device. Maximum Ratings are stress ratings only. Functional operation above the
Recommended Operating Conditions is not implied. Extended exposure to stresses above the Recommended Operating Conditions may affect
device reliability.
2. Maximum electrical ratings are defined as those values beyond which damage to the device may occur at T
A
= +25°C.
3. The thermal shutdown set to 160°C (typical) avoids irreversible damage on the device due to power dissipation. For further information see
page 7.
4. For the 9−Pin Flip−Chip CSP package, the R
qJA
is highly dependent of the PCB Heatsink area. For example, R
qJA
can equal 195°C/W with
50 mm
2
total area and also 135°C/W with 500 mm
2
. For further information see page 10. The bumps have the same thermal resistance and
all need to be connected to optimize the power dissipation.
5. Human Body Model, 100 pF discharge through a 1.5 kW resistor following specification JESD22/A114.
6. Machine Model, 200 pF discharged through all pins following specification JESD22/A115.
7. Maximum ratings per JEDEC standard JESD78.
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