NCP2993 D

NCP2993
1.3 Watt Audio Power
Amplifier with Selectable
Fast Turn On Time
The NCP2993 is an audio power amplifier designed for portable
communication device applications such as mobile phone
applications. The NCP2993 is capable of delivering 1.3 W of
continuous average power to an 8.0 BTL load from a 5.0 V power
supply, and 1.1 W to a 4.0 BTL load from a 3.6 V power supply.
The NCP2993 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 NCP2993 contains circuitry to prevent from “pop and click”
noise that would otherwise occur during turn−on and turn−off
transitions. It is a zero pop noise device when a single ended or a
differential audio input is used.
For maximum flexibility, the NCP2993 provides an externally
controlled gain (with resistors). In addition, it integrates 2 different
Turn On times (15 ms or 30 ms) adjustable with the TON pin.
Due to its superior 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 package with a
0.4mm pitch (Lead−Free).
Features
• 1.3 W to an 8.0 BTL Load from a 5.0 V Power Supply
• Best−in−Class PSRR: up to −88 dB, Direct Connection to the
•
•
•
•
•
•
•
Battery
Zero Pop Noise Signature with a Single Ended Audio Input
Ultra Low Current Shutdown Mode: 10 nA
2.5 V−5.5 V Operation
External Gain Configuration Capability
External Turn−on Time Configuration Capability: 15 ms or 30 ms
Thermal Overload Protection Circuitry
This is a Pb−Free Device*
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MARKING
DIAGRAM
WLCSP9
FC SUFFIX
CASE 499BM
2993
A
Y
WW
G
2993
AYWW
G
= Specific Device Code
= Assembly Location
= Year
= Work Week
= Pb−Free Package
PIN CONNECTIONS
A1
A2
A3
INM
OUTA
INP
B1
B2
B3
VM
TON
VP
C1
C2
C3
BYPASS
OUTB SHUTDOWN
(Top View)
ORDERING INFORMATION
See detailed ordering and shipping information in the package
dimensions section on page 11 of this data sheet.
Typical Applications
• 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, 2011
November, 2011 − Rev. 1
1
Publication Order Number:
NCP2993/D
NCP2993
Rf
24 k
Vp
Cs
AUDIO
INPUT
Ci
100 nF
Ri
INM
+
INP
24 k
1 F
Vp
OUTA
R1
20 k
Vp
+
BYPASS
Cbypass
R2
20 k
8
OUTB
1 F
SHUTDOWN
SHUTDOWN
CONTROL
TON
VM
Connect to Vp or GND
Figure 1. Typical Audio Amplifier Application Circuit with Single Ended Input
Rf
24 k
Ci
Ri
100 nF
24 k
+
AUDIO
INPUT
−
Ci
100 nF
Cs
INM
Ri
Vp
Vp
24 k
Rf
+
BYPASS
Cbypass
1 F
+
INP
24 k
Vp
OUTA
R1
20 k
R2
20 k
OUTB
1 F
SHUTDOWN
SHUTDOWN
CONTROL
TON
VM
Connect to Vp or GND
Figure 2. Typical Audio Amplifier Application Circuit with a Differential Input
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8
NCP2993
PIN DESCRIPTION
Pin
Name
Type
Description
A1
INM
I
Negative input of the first amplifier, receives the audio input signal. Connected to the feedback
resistor Rf and to the input resistor Rin.
A2
OUTA
O
Negative output of the NCP2993. Connected to the load and to the feedback resistor Rf.
A3
INP
I
Positive input of the first amplifier, receives the common mode voltage.
B1
VM
I
Analog Ground.
B2
TON
I
TON pin selects 2 different Turn On times:
TON = GND −> 30 ms
TON = VP −> 15 ms
B3
VP
I
Positive analog supply of the cell. Range: 2.5 V−5.5 V.
C1
BYPASS
I
Bypass capacitor pin which provides the common mode voltage (Vp/2).
C2
OUTB
O
Positive output of the NCP2993. Connected to the load.
C3
SHUTDOWN
I
The device enters in shutdown mode when a low level is applied on this pin.
MAXIMUM RATINGS (Note 1)
Rating
Symbol
Value
Unit
Vp
6.0
V
Op Vp
2.5 to 5.5 V
−
Input Voltage
Vin
−0.3 to VCC +0.3
V
Power Dissipation (Note 2)
Pd
Internally Limited
−
Operating Ambient Temperature
TA
−40 to +85
°C
Supply Voltage
Operating Supply Voltage
Max Junction Temperature
TJ
150
°C
Storage Temperature Range
Tstg
−65 to +150
°C
Thermal Resistance Junction−to−Air
RJA
(Note 3)
°C/W
−
2000
200
V
−
±100
mA
ESD Protection
Human Body Model (HBM) (Note 4)
Machine Model (MM) (Note 5)
Latchup Current @ TA = 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 TA = +25°C.
2. The thermal shutdown set to 160°C (typical) avoids irreversible damage on the device due to power dissipation.
3. The RJA is highly dependent of the PCB Heatsink area. For example, RJA can equal 195°C/W with 50 mm2 total area and also 135°C/W with
500 mm2. 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 k resistor following specification JESD22/A114.
5. Machine Model, 200 pF discharged through all pins following specification JESD22/A115.
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NCP2993
ELECTRICAL CHARACTERISTICS Limits apply for TA between −40°C to +85°C (Unless otherwise noted).
Characteristic
Supply Quiescent Current
Common Mode Voltage
Symbol
Conditions
Min
(Note 6)
Typ
Idd
Vp = 2.5 V, No Load
Vp = 5.0 V, No Load
−
−
Vp = 2.5 V, 8 Vp = 5.0 V, 8 −
Vcm
Max
(Note 6)
Unit
1.8
1.95
3.5
mA
−
−
1.8
1.95
3.5
−
Vp/2
−
V
Shutdown Current
ISD
−
0.02
0.5
A
Shutdown Pull−Down
RSD
−
300
−
k
V
Shutdown Voltage High
VSDIH
−
1.2
−
−
Shutdown Voltage Low
VSDIL
−
−
−
0.4
V
Turn On Time (Note 8)
TWU
TON = GND
TON = VP
−
30
15
−
ms
Turn Off Time
TOFF
−
−
1.0
−
s
Output Impedance in Shutdown Mode
ZSD
−
−
8.5
−
k
Vloadpeak
Vp = 2.5 V, RL = 8.0 Vp = 5.0 V, RL = 8.0 (Note 7)
TA = +25°C
1.9
2.3
−
−
V
3.8
4.6
Vp = 2.5 V, RL = 4.0 THD + N < 1%
Vp = 2.5 V, RL = 8.0 THD + N < 1%
Vp = 5.0 V, RL = 8.0 THD + N < 1%
−
0.5
−
W
PDmax
Vp = 5.0 V, RL = 8.0 −
−
0.65
W
Output Offset Voltage
VOS
Vp = 2.5 V
Vp = 5.0 V
−
1.0
−
mV
Signal−to−Noise Ratio
SNR
Vp = 2.5 V, G = 2.0
20 Hz < F < 20 kHz
−
91
−
dB
PSRR V+
G = 2.0, RL = 8.0 Cby = 1.0 F
Input Grounded
F = 217 Hz
Vp = 5.0 V
Vp = 4.2 V
Vp = 3.0 V
−
−
−
−88
−88
−88
−
−
−
F = 1.0 kHz
Vp = 5.0 V
Vp = 4.2 V
Vp = 3.0 V
−
−
−
−88
−88
−88
−
−
−
Vp = 2.5 V, Porms = 320 mW
Vp = 5.0 V, Porms = 1.0 W
−
−
70
60
−
−
%
Output Swing
RMS Output Power
Maximum Power Dissipation (Note 8)
Positive Supply Rejection Ratio
Efficiency
Thermal Shutdown Temperature
Total Harmonic Distortion
PO
Tsd
THD
0.32
−
−
1.3
dB
−
160
−
°C
Vp = 2.5 V, F = 1.0 kHz
RL = 4.0 AV = 2.0
PO = 0.32 W
−
−
−
−
0.015
−
−
−
−
%
Vp = 5.0 V, F = 1.0 kHz
RL = 8.0 AV = 2.0
PO = 1.0 W
−
−
−
−
0.01
−
−
−
−
6. Min/Max limits are guaranteed by design, test or statistical analysis.
7. This parameter is guaranteed but not tested in production in case of a 5.0 V power supply.
8. See page 10 for a theoretical approach of this parameter.
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NCP2993
TYPICAL CHARACTERISTICS
0.1
0.01
0.001
10
100
1,000
100
1,000
10,000
Figure 3. THD+N vs. Frequency,
Single−Ended Input
Figure 4. THD+N vs. Frequency,
Single−Ended Input
1
THD+N
VP = 5 V
Pout = 250 mW
RL = 8 0.01
100
1,000
10,000
0.1
0.01
0.001
10
100,000
100
1,000
10,000
FREQUENCY (Hz)
Figure 5. THD+N vs. Frequency,
Single−Ended Input
Figure 6. THD+N vs. Frequency,
Single−Ended Input
1
THD+N
VP = 3 V
Pout = 250 mW
RL = 4 THD+N (%)
0.1
0.01
100
1,000
10,000
0.01
100
1,000
10,000
FREQUENCY (Hz)
FREQUENCY (Hz)
Figure 7. THD+N vs. Frequency,
Single−Ended Input
Figure 8. THD+N vs. Frequency,
Single−Ended Input
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5
100,000
THD+N
VP = 5 V
Pout = 500 mW
RL = 4 0.1
0.001
10
100,000
100,000
THD+N
VP = 2.5 V
Pout = 100 mW
RL = 4 FREQUENCY (Hz)
1
0.001
10
0.01
FREQUENCY (Hz)
0.1
0.001
10
0.1
0.001
10
100,000
THD+N (%)
THD+N (%)
10,000
THD+N
VP = 3 V
Pout = 250 mW
RL = 8 FREQUENCY (Hz)
1
THD+N (%)
1
THD+N
VP = 2.5 V
Pout = 100 mW
RL = 8 THD+N (%)
THD+N (%)
1
100,000
NCP2993
TYPICAL CHARACTERISTICS
0.1
0.01
0.001
10
100
1,000
100,000
100
1,000
10,000
Figure 9. THD+N vs. Frequency,
Differential Input
Figure 10. THD+N vs. Frequency,
Differential Input
1
THD+N
VP = 5 V
Pout = 500 mW
RL = 8 0.01
100
1,000
10,000
100,000
0.1
0.01
0.001
10
100
1,000
10,000
FREQUENCY (Hz)
Figure 11. THD+N vs. Frequency,
Differential Input
Figure 12. THD+N vs. Frequency,
Differential Input
1
THD+N
VP = 3 V
Pout = 250 mW
RL = 4 THD+N (%)
0.1
0.01
100
1,000
10,000
100,000
100,000
THD+N
VP = 5 V
Pout = 500 mW
RL = 4 0.1
0.01
0.001
10
100
1,000
10,000
FREQUENCY (Hz)
FREQUENCY (Hz)
Figure 13. THD+N vs. Frequency,
Differential Input
Figure 14. THD+N vs. Frequency,
Differential Input
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100,000
THD+N
VP = 2.5 V
Pout = 100 mW
RL = 4 FREQUENCY (Hz)
1
0.001
10
0.01
FREQUENCY (Hz)
0.1
0.001
10
0.1
0.001
10
THD+N (%)
THD+N (%)
10,000
THD+N
VP = 3 V
Pout = 250 mW
RL = 8 FREQUENCY (Hz)
1
THD+N (%)
1
THD+N
VP = 2.5 V
Pout = 100 mW
RL = 8 THD+N (%)
THD+N (%)
1
100,000
NCP2993
TYPICAL CHARACTERISTICS
10
Vp = 2.5 V
THD (%)
1
3.6 V
5.5 V
5.0 V
4.2 V
3.0 V
0.1
2.7 V
0.01
0.001
THD+N
RL = 8 Single−Ended Input
0
200
400
600
1000
800
1200
1400
1600
1800
Pout (mW)
Figure 15. THD+N vs. Pout
10
Vp = 2.5 V
1
3.6 V
4.2 V
5.5 V
5.0 V
THD (%)
2.7 V
3.0 V
0.1
0.01
THD+N
RL = 8 Differential Input
0
200
400
600
800
1000
1200
1400
1600
1800
Pout (mW)
Figure 16. THD+N vs. Pout
0
−20
PSRR (dB)
−30
−40
0
PSRR
VP = 3 V
G=2
Input Shorted
to GND
−50
−60
−70
−80
−40
−60
−80
−100
−90
−100
10
PSRR
VP = 3 V
G=2
Input Shorted to GND
Differential Configuration
−20
PSRR (dB)
−10
100
1000
10000
100000
−120
10
100
1000
10000
FREQUENCY (Hz)
FREQUENCY (Hz)
Figure 17. PSRR vs. Frequency
Figure 18. PSRR vs. Frequency
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100000
NCP2993
TYPICAL CHARACTERISTICS
0
−30
−40
PSRR
VP = 4.2 V
G=2
Input Shorted to GND
Differential Configuration
−10
−20
−30
PSRR (dB)
−20
PSRR (dB)
0
PSRR
VP = 4.2 V
G=2
Input Shorted
to GND
−10
−50
−60
−40
−50
−60
−70
−70
−80
−80
−90
−90
−100
10
−100
10
100
1000
10000
100000
1000
10000
FREQUENCY (Hz)
FREQUENCY (Hz)
Figure 19. PSRR vs. Frequency
Figure 20. PSRR vs. Frequency
0
100000
0
PSRR
VP = 5 V
G=2
Input Shorted
to GND
−20
−30
−40
−20
−30
−50
−60
−40
−50
−60
−70
−70
−80
−80
−90
−90
−100
10
PSRR
VP = 5 V
G=2
Input Shorted to GND
Differential Configuration
−10
PSRR (dB)
−10
PSRR (dB)
100
100
1000
10000
100000
−100
10
100
1000
10000
FREQUENCY (Hz)
FREQUENCY (Hz)
Figure 21. PSRR vs. Frequency
Figure 22. PSRR vs. Frequency
100000
900
800
700
5.5 V
Pdsp (mW)
600
5.0 V
500
4.2 V
400
3.6 V
300
3.0 V
200
100
0
Vp = 2.5 V
0
200
2.7 V
400
RL = 8 600
800
1000
Pout (mW)
Figure 23. Power Dissipation vs. Pout
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1200
1400
1600
1800
2000
100
1800
90
1600
80
1400
70
1200
60
SNR (dB)
MAXIMUM OUTPUT POWER (mW)
NCP2993
1000
800
600
40
30
400
3.0
3.5
4.0
4.5
5.0
SNR
Pout = 125 mW
RL = 8 20
THD+N < 1%
RL = 8 200
0
2.5
50
10
0
5.5
10
100
1000
10000
FREQUENCY (Hz)
VP (V)
Figure 24. Maximum Output Power vs. VP
Figure 25. SNR vs. Frequency
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100000
NCP2993
APPLICATION INFORMATION
Detailed Description
transistors are real−time controlled, and when one current
exceeds 1.1 A, the gate voltage of the MOS transistor is
clipped and no more current can be delivered.
The NCP2993 audio amplifier can operate under 2.5 V
until 5.5 V power supply. With less than 1% THD + N, it
can deliver up to 1.35 W RMS output power to an 8.0 load (VP = 5.0 V). If application allows to reach 10%
THD + N, then 1.65 W can be provided using a 5.0 V
power supply.
The structure of the NCP2993 is basically composed of
two identical internal power amplifiers; the first one is
externally configurable with gain−setting resistors Rin and
Rf (the closed−loop gain is fixed by the ratios of these
resistors) and the second is internally fixed in an inverting
unity−gain configuration by two resistors of 20 k. So the
load is driven differentially through OUTA and OUTB
outputs. This configuration eliminates the need for an
output coupling capacitor.
Thermal Overload Protection
Internal amplifiers are switched off when the
temperature exceeds 160°C, and will be switched on again
only when the temperature decreases fewer than 140°C.
The NCP2993 is unity−gain stable and requires no
external components besides gain−setting resistors, an
input coupling capacitor and a proper bypassing capacitor
in the typical application.
The first amplifier is externally configurable (Rf and
Rin), while the second is fixed in an inverting unity gain
configuration.
The differential−ended amplifier presents two major
advantages:
− The possible output power is four times larger (the
output swing is doubled) as compared to a single−ended
amplifier under the same conditions.
− Output pins (OUTA and OUTB) are biased at the same
potential VP/2, this eliminates the need for an output
coupling capacitor required with a single−ended
amplifier configuration.
The differential closed loop−gain of the amplifier is
Internal Power Amplifier
The output PMOS and NMOS transistors of the amplifier
were designed to deliver the output power of the
specifications without clipping. The channel resistance
(Ron) of the NMOS and PMOS transistors does not exceed
0.6 when they drive current.
The structure of the internal power amplifier is
composed of three symmetrical gain stages, first and
medium gain stages are transconductance gain stages to
obtain maximum bandwidth and DC gain.
R
V
given by Avd + 2 * f + orms .
Rin
Vinrms
Output power delivered to the load is given by
Turn−On and Turn−Off Transitions
Porms +
When a shutdown low level is applied, the output level
is tied to Ground on each output after 10 s.
With TON = GND, turn on time is set to 30 ms. With TON
= VP, turn on time is set to 15 ms. To avoid any pop and click
noises, Rin * Cin < 2.4 ms with TON = GND and Rin * Cin
< 1.2 ms with TON = Vp. The electrical characteristics are
identical with the 2 configurations. This fast turn on time
added to a very low shutdown current saves battery life and
brings flexibility when designing the audio section of the
final application.
NCP2993 is a zero pop noise device when using a
single−ended or differential audio input configuration.
(Vopeak)2
(Vopeak is the peak differential output
2 * RL
voltage).
When choosing gain configuration to obtain the desired
output power, check that the amplifier is not current limited
or clipped.
The maximum current which can be delivered to the load
is 500 mA Iopeak +
Vopeak
.
RL
Gain−Setting Resistor Selection (Rin and Rf)
Rin and Rf set the closed−loop gain of the amplifier.
In order to optimize device and system performance, the
NCP2993 should be used in low gain configurations.
The low gain configuration minimizes THD + noise
values and maximizes the signal to noise ratio, and the
amplifier can still be used without running into the
bandwidth limitations.
A closed loop gain in the range from 2 to 5 is
recommended to optimize overall system performance.
An input resistor (Rin) value of 24 k is realistic in most
of applications, and doesn’t require the use of a too large
capacitor Cin.
Shutdown Function
The device enters shutdown mode when shutdown signal
is low. During the shutdown mode, the DC quiescent
current of the circuit does not exceed 100 nA. In this
configuration, the output impedance is 8.5 k on each
output.
Current Limit Circuit
The maximum output power of the circuit (Porms =
1.0 W, VP = 5.0 V, RL = 8.0 ) requires a peak current in
the load of 500 mA.
In order to limit the excessive power dissipation in the
load when a short−circuit occurs, the current limit in the
load is fixed to 1.1 A. The current in the four output MOS
Input Capacitor Selection (Cin)
The input coupling capacitor blocks the DC voltage at
the amplifier input terminal. This capacitor creates a
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10
NCP2993
high−pass filter with Rin, the cut−off frequency is given by
− up to 22 pF capacitor connected between each amplifier
output terminals and ground.
− Dedicated IEC filters such as ESD7.0 series from
ON Semiconductor.
In any case, the protection should be placed as close as
possible to the ESD stress entry point. Proper and carefull
layout is a key factor to ensure optimum protection level is
achieved. Designer should make sure the connection
impedance between protection and ground / protection and
NCP2993 is as low as possible.
1
fc +
.
2 * * Rin * Cin
The size of the capacitor must be large enough to couple
in low frequencies without severe attenuation.
IEC 61000-4-2 Level 4
In some particular applications, NCP2993 may need
extra ESD protection to pass IEC 61000-4-2 Level 4
qualification.
Depending on the test, user can consider different level
of protection:
ORDERING INFORMATION
Device
NCP2993FCT2G
Package
Shipping†
9−Pin Flip−Chip
(Pb−Free)
3000 / Tape & Reel
†For information on tape and reel specifications, including part orientation and tape sizes, please refer to our Tape and Reel Packaging
Specifications Brochure, BRD8011/D.
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NCP2993
PACKAGE DIMENSIONS
WLCSP9 1.22x1.22
CASE 499BM−01
ISSUE O
D
PIN A1
REFERENCE
2X
NOTES:
1. DIMENSIONING AND TOLERANCING PER
ASME Y14.5M, 1994.
2. CONTROLLING DIMENSION: MILLIMETERS.
3. COPLANARITY APPLIES TO SPHERICAL
CROWNS OF SOLDER BALLS.
A B
ÈÈ
E
DIM
A
A1
A2
b
D
E
e
0.05 C
2X
0.05 C
TOP VIEW
A2
0.05 C
RECOMMENDED
SOLDERING FOOTPRINT*
A
0.05 C
NOTE 3
9X
A1
0.03 C
A1
SEATING
PLANE
PACKAGE
OUTLINE
9X
e
b
0.05 C A B
C
SIDE VIEW
MILLIMETERS
MIN
MAX
−−−
0.66
0.17
0.24
0.40 REF
0.24
0.29
1.22 BSC
1.22 BSC
0.40 BSC
e
0.40
PITCH
C
B
A
0.25
0.40
PITCH
DIMENSIONS: MILLIMETERS
1
2
3
*For additional information on our Pb−Free strategy and soldering
details, please download the ON Semiconductor Soldering and
Mounting Techniques Reference Manual, SOLDERRM/D.
BOTTOM VIEW
ON Semiconductor and
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damages. “Typical” parameters which may be provided in SCILLC data sheets and/or specifications can and do vary in different applications and actual performance may vary over
time. All operating parameters, including “Typicals” must be validated for each customer application by customer’s technical experts. SCILLC does not convey any license under
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