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YDA144 Datasheet

  • YDA144

  • STEREO 2.1W Non-Clip DIGITAL AUDIO POWER AMPLIFIER

  • 26頁

  • YAMAHA

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YDA144
D- 4N
STEREO 2.1W Non-Clip DIGITAL AUDIO POWER AMPLIFIER
鈻燨verview
YDA144 (D-4N) is a digital audio power amplifier IC with maximum output of 2.1W (R
L
=4鈩?脳2ch.
YDA144 has a 鈥淧ure Pulse Direct Speaker Drive Circuit鈥?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 YDA144 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. Attack time and release time can be freely set by external resistances
or capacitances.
The independent power-down function for L channel and R channel minimizes consumption current at standby. 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.
鈻燜eatures
銉籑aximum
output
2.1 W脳2ch (V
DDP
=V
DDA
=5.0V, R
L
=4鈩? THD+N=10%)
0.75 W脳2ch (V
DDP
=V
DDA
=3.6V, R
L
=8鈩? THD+N=10%)
銉籇istortion
Rate (THD+N)
0.03 % (V
DDP
=V
DDA
=3.6V, R
L
=8鈩? Po=0.4W, 1kHz)
銉籖esidual
Noise
40碌Vrms (V
DDP
=V
DDA
=3.6V, Av=12dB)
銉籈fficiency
84 % (V
DDP
=V
DDA
=3.6V, R
L
=8鈩? Po=600mW)
78 % (V
DDP
=V
DDA
=3.6V, R
L
=8鈩? Po=100mW)
銉籗/N
Ratio
95dB (V
DDP
=V
DDA
=3.6V, Av=12dB)
銉籆hannel
separation
95dB (V
DDP
=V
DDA
=3.6V, R
L
=8鈩? Av=18dB, 1kHz)
銉籓ver-current
Protection function
銉籘hermal
Protection function
銉籐ow
voltage Malfunction Prevention function
銉?/div>
2ch independent power-down control function
銉籔ower-down
High speed Recovery function
銉籔ackage
Lead-free 16-ball WLCSP (YDA144-WZ)
Lead-free 20-pin QFN (YDA144-QZ)
YDA144 CATALOG
CATALOG No.:LSI-4DA144A30
2006.11

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