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YAMAHA CORPORATION

YDA145 Datasheet Preview

YDA145 Datasheet

MONAURAL 2.1W Non-Clip DIGITAL AUDIO POWER AMPLIFIER

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YDA145
D- 4H
MONAURAL 2.1W Non-Clip DIGITAL AUDIO POWER AMPLIFIER
Overview
YDA145 (D-4H) is a digital audio power amplifier IC with maximum output of 2.1W (RL=4)×1ch.
YDA145 has a “Pure Pulse Direct Speaker Drive Circuit” which directly drives speakers while reducing distortion of
pulse output signal and reducing noise on the signal, and realizes the highest standard low distortion rate characteristics
and low noise characteristics among digital amplifier ICs for mobile use.
In addition, circuit design with fewer external parts can be made depend on the condition of use because corresponds to
filter less.
The YDA145 features Yamaha original non-clip output control function which detects output signal clip due to the over
level input signal and suppress the output signal clip automatically. Also the non-clip output control function can adapt
the output clip caused by power supply voltage down with battery. This is the difference from the traditional AGC (Auto
Gain Control) or ALC (Auto Level Control) circuit.
YDA145 has the power-down function which can minimize the power consumption in the standby state.
As for protection function, overcurrent protection function for speaker output terminal, overtemperatue protection
function for inside of the device, and low supply voltage malfunction preventing function are prepared.
Features
Maximum output
2.1 W×1ch (VDD=5.0V, RL=4, THD+N=10%)
0.75 W×1ch (VDD=3.6V, RL=8, THD+N=10%)
Distortion Rate (THD+N)
0.03 % (VDD=3.6V, RL=8, Po=0.4W, 1kHz)
Residual Noise
www.DataSheet4EU4f.f5cioµcmiVenrmcys (VDD=3.6V, Av=18dB)
84 % (VDD=3.6V, RL=8, Po=600mW)
78 % (VDD=3.6V, RL=8, Po=100mW)
S/N Ratio
94dB (VDD=3.6V, Av=18dB)
Over-current Protection function
Thermal Protection function
Low voltage Malfunction Prevention function
Pop noise reduction function
Power-down control function
Power-down High speed Recovery function
Package
Lead-free 9-ball WLCSP (YDA145-PZ)
YDA145 CATALOG
CATALOG No.:LSI-4DA145A30
2007.10




YAMAHA CORPORATION

YDA145 Datasheet Preview

YDA145 Datasheet

MONAURAL 2.1W Non-Clip DIGITAL AUDIO POWER AMPLIFIER

No Preview Available !

Terminal configuration
YDA145
<9-ball WLCSP Bottom View>
Terminal function
No. Name
I/O Protection circuit composition
Function
A1 IN+
A
PN Positive input terminal (differential +)
A2 VDD
Power
- Power supply
A3 OUT+
O
- Positive output terminal (differential +)
B1 AGND
GND
- GND for analog circuits
B2 VREF
A
PN Analog reference power supply terminal
B3 PGND
GND
- GND for output
www.DataCSh1eet4UI.Nco-m
A
PN Negative input terminal (differential -)
C2 CTRL
I
N Power down and Non-clip control terminal
C3 OUT-
O
- Negative output terminal (differential -)
(Note) I: Input terminal O: Output terminal A: Analog terminal
When a voltage that is bigger than the AVDD potential is impressed to the terminal of PN (protection circuit is
composed of PMOS and NMOS), the leakage current flows through the protection circuit of PMOS.
2


Part Number YDA145
Description MONAURAL 2.1W Non-Clip DIGITAL AUDIO POWER AMPLIFIER
Maker YAMAHA CORPORATION
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YDA145 Datasheet PDF






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