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PDF NCP2991 Data sheet ( Hoja de datos )
| Número de pieza | NCP2991 | |
| Descripción | 1.35 Watt Audio Power Amplifier | |
| Fabricantes | ON Semiconductor | |
| Logotipo |  |
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NCP2991
1.35 Watt Audio Power
Amplifier with Selectable
Fast Turn On Time
The NCP2991 is an audio power amplifier designed for portable
communication device applications such as mobile phone
applications. The NCP2991 is capable of delivering 1.35 W of
continuous average power to an 8.0 W BTL load from a 5.0 V power
supply, and 1.1 W to a 4.0 W BTL load from a 3.6 V power supply.
The NCP2991 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 NCP2991 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 NCP2991 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 (Lead−Free).
Features
• 1.35 W to an 8.0 W BTL Load from a 5.0 V Power Supply
• Best−in−Class PSRR: up to −100 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*
Typical Applications
• Portable Electronic Devices
• PDAs
• Wireless Phones
www.DataSheet4U.com
http://onsemi.com
MARKING
DIAGRAMS
9−Pin Flip−Chip CSP
FC SUFFIX
CASE 499E
MRHG
AYWW
MRH
A
Y
WW
G
A1
= Specific Device Code
= Assembly Location
= Year
= Work Week
= Pb−Free Package
PIN CONNECTIONS
A1 A2
INM OUTA
A3
INP
B1 B2
VM TON
C1 C2
B3
VP
C3
BYPASS OUTB SHUTDOWN
(Top View)
ORDERING INFORMATION
See detailed ordering and shipping information in the package
dimensions section on page 13 of this data sheet.
*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, 2008
October, 2008 − Rev. 0
1
Publication Order Number:
NCP2991/D
1 page  
NCP2991
TYPICAL CHARACTERISTICS
11
THD+N
VP = 2.5 V
Pout = 100 mW
RL = 8 W
THDw+Nww.DataSheet4U.com
VP = 3 V
Pout = 250 mW
RL = 8 W
0.1 0.1
0.01
100
1,000
FREQUENCY (Hz)
Figure 3. THD+N vs. Frequency
10,000
0.01
100
1,000
FREQUENCY (Hz)
Figure 4. THD+N vs. Frequency
10,000
11
THD+N
VP = 5 V
Pout = 250 mW
RL = 8 W
THD+N
VP = 2.5 V
Pout = 100 mW
RL = 4 W
0.1 0.1
0.01
100
1,000
FREQUENCY (Hz)
Figure 5. THD+N vs. Frequency
10,000
0.01
100
1,000
FREQUENCY (Hz)
Figure 6. THD+N vs. Frequency
10,000
11
THD+N
VP = 3 V
Pout = 250 mW
RL = 4 W
THD+N
VP = 5 V
Pout = 500 mW
RL = 4 W
0.1 0.1
0.01
100
1,000
FREQUENCY (Hz)
Figure 7. THD+N vs. Frequency
10,000
0.01
100
1,000
FREQUENCY (Hz)
Figure 8. THD+N vs. Frequency
10,000
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5
5 Page 
NCP2991
Ch1 : OUTA
Ch2 : OUTB
Ch3 : /SD
M1 = Ch1 – Ch2 : Differential
signal seen by the load
Ch1 : OUTA
Ch2 : OUTB
Ch3 : /SD
M1 = Ch1 – Ch2 : Differential
signal seen by the load
www.DataSheet4U.com
Figure 33. Zero pop noise turn on sequence with
single-ended input to ground (Ci = 47 nF, Ri = 24 kW,
Rf = 24 kW, Cbyp = 1 mF, Rl = 8 W, Ton = Vp)
Figure 34. Zero pop noise turn on sequence with
single-ended input audio source (Ci = 47 nF, Ri =
24 kW, Rf = 24 kW, Cbyp = 1 mF, Rl = 8 W, Ton = Vp)
Ch1 : OUTA
Ch2 : OUTB
Ch3 : /SD
M1 = Ch1 – Ch2 : Differential
signal seen by the load
Ch1 : OUTA
Ch2 : OUTB
Ch3 : /SD
M1 = Ch1 – Ch2 : Differential
signal seen by the load
Figure 35. Zero pop noise turn off sequence with
single-ended input to ground (Ci = 47 nF, Ri = 24 kW,
Rf = 24 kW, Cbyp = 1 mF, Rl = 8 W, Ton = Vp)
Figure 36. Zero pop noise turn off sequence with
single-ended input audio source (Ci = 47 nF, Ri =
24 kW, Rf = 24 kW, Cbyp = 1 mF, Rl = 8 W, Ton = Vp)
http://onsemi.com
11
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| Páginas | Total 14 Páginas | |
| PDF Descargar | [ Datasheet NCP2991.PDF ] | |
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