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PDF YDA145 Data sheet ( Hoja de datos )
| Número de pieza | YDA145 | |
| Descripción | MONAURAL 2.1W Non-Clip DIGITAL AUDIO POWER AMPLIFIER | |
| Fabricantes | YAMAHA CORPORATION | |
| Logotipo |  |
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Hay una vista previa y un enlace de descarga de YDA145 (archivo pdf) en la parte inferior de esta página. Total 20 Páginas | ||
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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=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
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=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)
・Residual Noise
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)
・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
1 page  
YDA145
●Non-Clip control Function
This is the function to control the output in order to obtain a maximum output level without distortion when an excessive
input which causes clipping at the differential signal output is applied. That is, with the Non-Clip function, YDA145 lowers
the Gain of the digital amplifier to an appropriate value so as not to cause the clipping at the differential signal output.
And, YDA145 follows also to the clip of the output wave form due to the decrease in the power-supply voltage.
<Operation outline of Non-Clip control function>
The attack time and the release time of Non-Clip control are fixation two levels, and selects with the CTRL terminal.
www.DataTAShnhede,Aetth4ttUeac.RckoemtliemaseeisTaimtiemies
interval until gain
a time from target
falls to target attenuation gain -3dB with a big
attenuation gain to not working of Non-Clip.
signal
input
enough.
Attack time and Release time
Non-Clip mode
Attack time
1(Recommendation)
45ms
2 10ms
Release time
2.6s
1.2s
5
5 Page 
YDA145
■Electrical Characteristic
●Absolute Maximum Ratings*1)
Item
Symbol
Min.
Max.
Unit
Power supply terminal voltage range
VDD －0.3 6.0 V
Input terminal voltage range (Analog input terminal: IN+, IN-)
VIN
VSS－0.6
VDD＋0.6
V
Input terminal voltage range (Input terminals except IN+, IN-)
Allowable dissipation (Ta=25℃) *2)
Allowable dissipation (Ta=85℃) *2)
VIN
PD25
PD85
VSS－0.3
VDD＋0.3
1.67
0.67
V
W
W
Junction Temperature
TJMAX
125 ℃
Storage Temperature
TSTG
－50
125 ℃
Note) *1:Absolute Maximum Ratings is values which must not be exceeded to guarantee device reliability and life,
and when using a device in excess even a moment, it may immediately cause damage to device or may significantly deteriorate
its reliability
With a system of which a voltage at an input pin might exceed a supply voltage of VDD/GND, use an external diode etc. to assure
that the voltage does not exceed the absolute maximum rating.
*2:θja=60.0℃/W, Conditions: YDA145 Evaluation board (4 layers), dead calm
●Recommended Operating Condition
Item
Symbol
Conditions
Min. Typ. Max. Unit
Power Supply Voltage
VDD
2.7 3.6 5.25 V
Operating Ambient Temperature
Ta
tPD (Min.)=50ms
tPD (Min.)=80ms
－20
－30
25
85 ℃
Speaker Impedance
RL
Note) Do not use under a condition other than the recommended operating conditions.
The rising time of VDD should be more than 1µｓ.
Please note not falling below than the power supply shut-down threshold voltage.
4
Ω
●DC Characteristics (VSS=0V, VDD=2.7V to 5.25V, Ta=－30ºC to 85ºC, unless otherwise specified)
Item
Symbol
Conditions
Min. Typ. Max.
Power supply start-up threshold voltage
VUVLH
2.2
Power supply shut-down threshold voltage
VUVLL
2.0
Non-Clip 1 mode setting threshold voltage
VMOD1
1.20
VDD
www.DaNtaoSnh-eCelitp4U2.cmomode setting threshold voltage
Non-Clip Off mode setting threshold voltage
VMOD2
VMOD3
0.80 1.10
0.36 0.68
Power-down mode setting threshold voltage VMOD4
VSS 0.14
Consumption current
IDD
VDD=3.6V, no load,
no signal input
4.0
Consumption current in power-down mode
VREF voltage
IPD
VREF
CTRL=VSS,Ta=25℃
0.1
VDD/2
Unit
V
V
V
V
V
V
mA
µA
V
11
11 Page | ||
| Páginas | Total 20 Páginas | |
| PDF Descargar | [ Datasheet YDA145.PDF ] | |
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