POWER AMPLIFIER. YDA145 Datasheet

YDA145 Datasheet PDF, Equivalent


Part Number

YDA145

Description

MONAURAL 2.1W Non-Clip DIGITAL AUDIO POWER AMPLIFIER

Manufacture

YAMAHA CORPORATION

Total Page 20 Pages
PDF Download
Download YDA145 Datasheet PDF


YDA145 Datasheet
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

YDA145 Datasheet
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


Features Datasheet pdf YDA145 D- 4H MONAURAL 2.1W Non-Clip DIGI TAL AUDIO POWER AMPLIFIER ■Overview Y DA145 (D-4H) is a digital audio power a mplifier IC with maximum output of 2.1W (RL=4Ω)×1ch. YDA145 has a “Pure P ulse Direct Speaker Drive Circuit” wh ich directly drives speakers while redu cing distortion of pulse output signal and reducing noise on the signal, and r ealizes the highest standard low distor tion rate characteristics and low noise characteristics among digital amplifie r ICs for mobile use. In addition, circ uit design with fewer external parts ca n be made depend on the condition of us e because corresponds to filter less. T he YDA145 features Yamaha original non- clip output control function which dete cts output signal clip due to the over level input signal and suppress the out put signal clip automatically. Also the non-clip output control function can a dapt the output clip caused by power su pply voltage down with battery. This is the difference from the traditional AGC (Auto Gain Control) or ALC (Aut.
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