NCP2824FCT2G ON Semiconductor, NCP2824FCT2G Datasheet - Page 10

• Manufacturer Part Number: NCP2824FCT2G
• Description: IC AMP MONO CLASS D AGC 9-WCSP
• Manufacturer: ON Semiconductor
• Series: NOCAP™r
• Type: Class Dr

Specifications of NCP2824FCT2G

• Output Type: 1-Channel (Mono)
• Max Output Power X Channels @ Load: 2.4W x 1 @ 4 Ohm
• Voltage - Supply: 2.5 V ~ 5.5 V
• Features: Differential Inputs
• Mounting Type: Surface Mount
• Package / Case: *
• Polarity: Negative, Positive
• Input Voltage Max: 5 V
• Maximum Operating Temperature: + 125 C
• Mounting Style: SMD/SMT
• Amplifier Class: D
• No. Of Channels: 1
• Output Power: 2W
• Supply Voltage Range: 2.5V To 5.5V
• Thd + N: 0.09% @ 1W, 8ohm, VDD=5V
• Load Impedance: 4ohm
• Operating Temperature Range: -40°C To +85°C
• Rohs Compliant: Yes
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Other names: NCP2824FCT2GOSTR

NOTE:
Built−in Low Pass Filter
directly to the NCP2824 input without increasing the output
noise by mixing frequency with the DAC/CODEC output
frequency. Consequently, optimized operation with DACs
or CODECs is guaranteed without additional external
components.
Decoupling Capacitors
supply in order to guarantee the best operation in terms of
audio performances. To achieve optimum performance, it is
necessary to place a 4.7 mF low ESR ceramic capacitor as
close as possible to the VDD pin in order to reduce high
frequency transient spikes due to parasitic inductance (see
Layout considerations).
Input Capacitors Cin
does not require input capacitors. However, it is possible to
Table 4. NCP2824 CONFIGURATION
Counting
This filter allows the user to connect a DAC or a CODEC
The NCP2824 requires a correct decoupling of the power
Thanks to its fully differential architecture, the NCP2824
Pulse
01
02
03
04
05
06
07
08
09
10
12
13
14
15
16
17
18
19
20
21
22
23
11
The given values are typical for Vdd = 3.6 V and
T
A
= 25°C characterized
Register
Control
Control
Control
Power
Reset
NC+L
AGC
Gain
Limit
THD
NC
Non Clip + Power limit
Reset configuration
Non Clip only
Gain = 12 dB
Gain = 18 dB
Description
AGC disable
AGC Enable
0.45 V
1.35 V
2.25 V
3.15 V
0.9 V
1.8 V
2.7 V
3.6 V
10%
15%
20%
1%
2%
4%
6%
8%
Peak
Peak
Peak
Peak
Peak
Peak
Peak
Peak
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10
use input capacitors when the differential source is not
biased or in single ended configuration. In this case it is
necessary to take into account the corner frequency which
can influence the low frequency response of the NCP2824.
The following equation will help choose the adequate input
capacitor.
Over Current Protection
be detected. When the current is higher than 2 A, the
H−Bridge is positioned in high impedance. When the short
circuit is removed or the current is lower, the NCP2824 goes
back to normal operation. This protection avoids over
current due to a bad assembly (Output shorted together, to
Vdd or to ground).
Layout Recommendations
recommended to use Power and ground plane in order to
reduce parasitic resistance and inductance.
traces short and well shielded in order to avoid them to act
as antenna.
application. However, ferrite beads placed close to the
NCP2824 will reduce EMI radiation when it is needed.
Components Selection
should be used to bypass the power input supply (VDD).
in the ceramic capacitor selection. Smaller case−size and
higher DC bias voltage is preferred.
to:
4.7 mF 6.3 V 0603
TDK: C1608X5R0J475MT 0.95 mm max.
This protection allows an over current in the H−Bridge to
For Efficiency and EMI considerations, it is strongly
For the same reason, it is recommended to keep the output
The level of EMI is strongly dependent upon the
Ferrite value is strongly dependent upon the application.
To achieve optimum performance, one 4.7 mF 6.3 V X5R
Also particular care must be observed for DC−bias effects
Some recommended capacitors include but are not limited
Figure 17. Example of PCB Layout
fc +
2 @ p @ 75 @ 10
1
3
@ Cin