MONAURAL 2.1W Non-Clip DIGITAL AUDIO POWER AMPLIFIER
YDA145 (D-4H) is a digital audio power amplifier IC with maximum output of 2.1W (RL=4Ω)×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
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.
2.1 W×1ch (VDD=5.0V, RL=4Ω, THD+N=10%)
0.75 W×1ch (VDD=3.6V, RL=8Ω, THD+N=10%)
・Distortion Rate (THD+N)
0.03 % (VDD=3.6V, RL=8Ω, Po=0.4W, 1kHz)
www.DataShee・t4EU4f.f5cioµcmiVenrmcys (VDD=3.6V, Av=18dB)
84 % (VDD=3.6V, RL=8Ω, Po=600mW)
78 % (VDD=3.6V, RL=8Ω, Po=100mW)
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
Lead-free 9-ball WLCSP (YDA145-PZ)