NCP2824FCT2G ON Semiconductor, NCP2824FCT2G Datasheet - Page 9

• 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

General Description
a preamplifier stage, a PWM stage and an H−Bridge stage
with an automatic Gain control circuitry which performs the
non clipping function.
Non Clipping Function
audio signal is going to be clipped, the gain of the audio
amplifier automatically decreases as defined by the AGC
operation. The maximum level of THD is programmable
and can be set by a final user through the single wire
interface (see table n°1).
monitored. The output signal is adapted to the dynamic
battery voltage (Vdd) in order to avoid distortion due to
supply voltage fluctuation like GSM burst.
sound pressure level while maintaining a controlled THD
level.
Power Limit Function: Speaker Protection
function is embedded in the NCP2824 in order to protect
speakers from excessive output signal levels. When the
output signal exceed this limit, the ???
program the maximum voltage rated by the speaker or to
disable this power limit protection.
The NCP2824 is a Mono class D audio amplifier featuring
In the presence of an exceeded input signal, when the
At the same time, the battery voltage is continuously
This function solution allows the chip to maximize the
The following picture depicts the non clipping operation.
In addition to the non clipping function, a Power limit
Thus, the final user can use the Single Wire interface to
VP/2
Figure 16. Output of the Amplifier during a Line
VP
Transient on the Battery Voltage
Detailed Operating Description
http://onsemi.com
9
AGC Operation
clipping function is engaged.
(“AGC Section”).
Attack time (Ta): is defined as the minimum time between
two gain decrease.
Hold time (Th): is defined as the minimum time between
a gain increase after a gain decrease.
Release time (Tr): is defined as the minimum time between
two gain increase.
operation.
Single Wire Interface Operation
configuration of the NCP2824.
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•
•
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configurations.
The AGC operation defines the timings when the non
The typical values are described in the Electrical Table
The following pictures depict the NCP2824 non clipping
Ta
The single wire interface allows changing the default
After Wake up, the NCP2824 is configured with:
The following table described all the NCP2824
AGC enable
Non Clip + Power limit
Gain = 18 dB
THD max = 1%
Th
Tr
Without Non clip
With Non clip
function
function