NCP2892 Series
1.3 Watt Audio Power
Amplifier with Fast Turn On
Time
The NCP2892 is an audio power amplifier designed for portable
communication device applications such as mobile phone
applications. The NCP2892 is capable of delivering 1.3 W of
continuous average power to an 8.0
W
BTL load from a 5.0 V power
supply, and 1.0 W to a 4.0
W
BTL load from a 3.6 V power supply.
The NCP2892 provides high quality audio while requiring few
external components and minimal power consumption. It features a
low−power consumption shutdown mode, which is achieved by
driving the SHUTDOWN pin with logic low.
The NCP2892 contains circuitry to prevent from “pop and click”
noise that would otherwise occur during turn−on and turn−off
transitions.
For maximum flexibility, the NCP2892 provides an externally
controlled gain (with resistors), as well as an externally controlled
turn−on time (with the bypass capacitor). When using a 1
mF
bypass
capacitor, it offers 100 ms wake up time.
Due to its excellent PSRR, it can be directly connected to the
battery, saving the use of an LDO.
This device is available in a 9−Pin Flip−Chip CSP (Lead−Free).
Features
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MARKING
DIAGRAMS
9−Pin Flip−Chip CSP
FC SUFFIX
CASE 499E
A3
A1
MAxG
AYWW
C1
A1
MAx
A
Y
WW
G
= Specific Device Code
X = NCP2892A
Z = NCP2892B
= Assembly Location
= Year
= Work Week
= Pb−Free Package
PIN CONNECTIONS
9−Pin Flip−Chip CSP
A1
INM
B1
VM_P
C1
BYPASS
A2
OUTA
B2
VM
C2
A3
INP
B3
V
p
C3
•
•
•
•
•
•
•
1.3 W to an 8.0
W
BTL Load from a 5.0 V Power Supply
Excellent PSRR: Direct Connection to the Battery
“Pop and Click” Noise Protection Circuit
Ultra Low Current Shutdown Mode: 10 nA
2.2 V−5.5 V Operation
External Gain Configuration Capability
External Turn−on Time Configuration Capability:
100 ms (1
mF
Bypass Capacitor)
•
Up to 1.0 nF Capacitive Load Driving Capability
•
Thermal Overload Protection Circuitry
•
This is a Pb−Free Device*
Typical Applications
OUTB SHUTDOWN
(Top View)
ORDERING INFORMATION
See detailed ordering and shipping information in the package
dimensions section on page 15 of this data sheet.
•
Portable Electronic Devices
•
PDAs
•
Wireless Phones
*For additional information on our Pb−Free strategy and soldering details, please
download the ON Semiconductor Soldering and Mounting Techniques Reference
Manual, SOLDERRM/D.
©
Semiconductor Components Industries, LLC, 2006
1
September, 2006 − Rev. 3
Publication Order Number:
NCP2892/D
NCP2892 Series
Rf
20 kW
Cs
Ci
47 nF
Ri
20 kW
V
p
1
mF
AUDIO
INPUT
INM
INP
V
p
−
+
V
p
OUTA
R1
20 kW
R2
20 kW
OUTB
8W
BYPASS
C
bypass
1
mF
SHUTDOWN
VIH
VIL
VM_P
−
+
SHUTDOWN
CONTROL
VM
Figure 1. Typical Audio Amplifier Application Circuit with Single Ended Input
Rf
20 kW
Cs
Ci
+
47 nF
AUDIO
INPUT
−
47 nF
20 kW
20 kW
C
bypass
Rf
BYPASS
1
mF
SHUTDOWN
VIH
VIL
VM_P
SHUTDOWN
CONTROL
VM
−
+
Ci
20 kW
Ri
V
p
INM
INP
−
+
V
p
OUTA
R1
20 kW
R2
20 kW
OUTB
Ri
V
p
1
mF
8W
Figure 2. Typical Audio Amplifier Application Circuit with a Differential Input
This device contains 671 active transistors and 1899 MOS gates.
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2
NCP2892 Series
PIN DESCRIPTION
Pin
A1
A2
A3
B1
B2
B3
C1
C2
C3
Type
I
O
I
I
I
I
I
O
I
Symbol
INM
OUTA
INP
VM_P
VM
V
p
BYPASS
OUTB
SHUTDOWN
Description
Negative input of the first amplifier, receives the audio input signal. Connected to the
feedback resistor R
f
and to the input resistor R
in
.
Negative output of the NCP2892. Connected to the load and to the feedback resistor Rf.
Positive input of the first amplifier, receives the common mode voltage.
Power Analog Ground.
Core Analog Ground.
Positive analog supply of the cell. Range: 2.2 V−5.5 V.
Bypass capacitor pin which provides the common mode voltage (Vp/2).
Positive output of the NCP2892. Connected to the load.
The device enters in shutdown mode when a low level is applied on this pin.
MAXIMUM RATINGS
(Note 1)
Rating
Supply Voltage
Operating Supply Voltage
Input Voltage
Max Output Current
Power Dissipation (Note 2)
Operating Ambient Temperature
Max Junction Temperature
Storage Temperature Range
Thermal Resistance Junction−to−Air
ESD Protection
Human Body Model (HBM) (Note 4)
NCP2892A
NCP2892B
Machine Model (MM) (Note 5)
Symbol
V
p
Op Vp
V
in
Iout
Pd
T
A
T
J
T
stg
R
qJA
−
8000
6000
>250
−
±100
mA
Value
6.0
2.2 to 5.5 V
2.0 V = Functional Only
−0.3 to Vcc +0.3
500
Internally Limited
−40 to +85
150
−65 to +150
(Note 3)
Unit
V
−
V
mA
−
°C
°C
°C
°C/W
V
Latchup Current at T
A
= 85°C (Note 6)
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.
1. Maximum electrical ratings are defined as those values beyond which damage to the device may occur at T
A
= +25°C.
2. The thermal shutdown set to 160°C (typical) avoids irreversible damage on the device due to power dissipation. For further information see
page 10.
3. 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.
4. Human Body Model, 100 pF discharge through a 1.5 kW resistor following specification JESD22/A114.
5. Machine Model, 200 pF discharged through all pins following specification JESD22/A115.
6. Maximum ratings per JEDEC standard JESD78.
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3
NCP2892 Series
ELECTRICAL CHARACTERISTICS
Limits apply for T
A
between −40°C to +85°C (Unless otherwise noted).
Characteristic
Supply Quiescent Current
Symbol
I
dd
Conditions
V
p
= 2.6 V, No Load
V
p
= 5.0 V, No Load
V
p
= 2.6 V, 8
W
V
p
= 5.0 V, 8
W
Common Mode Voltage
Shutdown Current
Shutdown Voltage High
Shutdown Voltage Low
Turning On Time (Note 9)
Turning Off Time
Output Impedance in Shutdown Mode
NCP2892A
NCP2892B
Output Swing
NCP2892A
V
cm
I
SD
V
SDIH
V
SDIL
T
WU
T
OFF
Z
SD
−
T
A
= +25°C
T
A
= −40°C to +85°C
−
−
C
by
= 1
mF
−
−
−
−
V
loadpeak
V
p
= 2.6 V, R
L
= 8.0
W
V
p
= 5.0 V, R
L
= 8.0
W
(Note 8)
T
A
= +25°C
T
A
= −40°C to +85°C
V
p
= 2.6 V, R
L
= 8.0
W
V
p
= 5.0 V, R
L
= 8.0
W
(Note 8)
T
A
= +25°C
T
A
= −40°C to +85°C
V
p
= 2.6 V, R
L
= 4.0
W
THD + N < 0.1%
V
p
= 2.6 V, R
L
= 8.0
W
THD + N < 0.1%
V
p
= 5.0 V, R
L
= 8.0
W
THD + N < 0.1%
V
p
= 2.6 V, R
L
= 4.0
W
THD + N < 0.1%
V
p
= 2.6 V, R
L
= 8.0
W
THD + N < 0.1%
V
p
= 5.0 V, R
L
= 8.0
W
THD + N < 0.1%
V
p
= 5.0 V, R
L
= 8.0
W
V
p
= 2.6 V
V
p
= 5.0 V
V
p
= 2.6 V, G = 2.0
10 Hz < F < 20 kHz
V
p
= 5.0 V, G = 10
10 Hz < F < 20 kHz
G = 2.0, R
L
= 8.0
W
Vp
ripple_pp
= 200 mV
C
by
= 1.0
mF
Input Terminated with 10
W
F = 217 Hz
V
p
= 5.0 V
V
p
= 3.0 V
V
p
= 2.6 V
F = 1.0 kHz
V
p
= 5.0 V
V
p
= 3.0 V
V
p
= 2.6 V
Efficiency
h
V
p
= 2.6 V, P
orms
= 320 mW
V
p
= 5.0 V, P
orms
= 1.0 W
1.6
4.0
3.85
1.6
4.0
3.85
−
100
10
2.12
4.15
2.20
4.50
0.36
0.28
−
1.08
−
0.40
0.30
−
1.20
−
−30
−
−
84
77
−
0.65
30
−
−
dB
W
mV
dB
−
−
W
−
−
W
−
−
V
−
−
−
−
W
kW
V
Min
(Note 7)
−
−
−
−
−
−
1.2
−
−
−
Typ
1.5
1.7
1.7
1.9
V
p
/2
0.01
−
−
90
1.0
Max
(Note 7)
4
5.5
−
0.5
1.0
−
0.4
−
−
V
mA
V
V
ms
ms
Unit
mA
Output Swing
NCP2892B
V
loadpeak
Rms Output Power
NCP2892A
P
O
Rms Output Power
NCP2892B
P
O
Maximum Power Dissipation (Note 9)
Output Offset Voltage
Signal−to−Noise Ratio
P
Dmax
V
OS
SNR
Positive Supply Rejection Ratio
PSRR V+
−
−
−
−64
−72
−73
−
−
−
−
−
−
−
−
−64
−74
−75
48
63
−
−
−
−
−
%
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4
NCP2892 Series
ELECTRICAL CHARACTERISTICS
Limits apply for T
A
between −40°C to +85°C (Unless otherwise noted).
Characteristic
Thermal Shutdown Temperature (Note 10)
Total Harmonic Distortion
Symbol
T
sd
THD
V
p
= 2.6, F = 1.0 kHz
R
L
= 4.0
W,
A
V
= 2.0
P
O
= 0.32 W
V
p
= 5.0 V, F = 1.0 kHz
R
L
= 8.0
W,
A
V
= 2.0
P
O
= 1.0 W
7. Min/Max limits are guaranteed by design, test or statistical analysis.
8. This parameter is guaranteed but not tested in production in case of a 5.0 V power supply.
9. See page 12 for a theoretical approach of this parameter.
10. For this parameter, the Min/Max values are given for information.
Conditions
Min
(Note 7)
140
−
−
−
−
−
−
Typ
160
−
0.04
−
−
0.02
−
Max
(Note 7)
180
−
−
−
−
−
−
Unit
°C
%
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