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Número de pieza | YDA139 | |
Descripción | STEREO 2.5W DIGITAL AUDIO POWER AMPLIFIER | |
Fabricantes | YAMAHA CORPORATION | |
Logotipo | ||
Hay una vista previa y un enlace de descarga de YDA139 (archivo pdf) en la parte inferior de esta página. Total 18 Páginas | ||
No Preview Available ! YDA139
D- 4
STEREO 2.5W DIGITAL AUDIO POWER AMPLIFIER
Overview
YDA139 (D-4) is a digital audio power amplifier IC with maximum output of 2.5W (RL=4 )×2ch.
YDA139 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 as the same class of output digital amplifier IC.
In addition, circuit design with fewer external parts can be made depend on the condition of use because corresponds to
filter less.
YDA139 has the power-down function which can minimize the power consumption in the standby state.
In addition, high speed recovery function provided realizes recovery time within 1ms from the power-down state.
Moreover, Over-current Protection function for speaker output terminals, IC Thermal Protection function, and POP
Noise Reduction function are provided.
YDA139 supports both digital signal input and analog signal input.
Features
・Maximum output
WLCSP25
2.5 W×2ch (VDDP=VDDA=5.0V, RL=4Ω, THD+N=10%)
1.5 W×2ch (VDDP=VDDA=5.0V, RL=8Ω, THD+N=10%)
SSOP24
2.5 W×2ch (VDDP=VDDA=5.0V, RL=4Ω, THD+N=10%)
1.3 W×2ch (VDDP=VDDA=5.0V, RL=8Ω, THD+N=10%)
・Efficiency
www.DataSheet4WU.LcoCmSP25
91 % (Analog input mode, VDDP=VDDA=5.0V, RL=8Ω, Po=1.5W)
SSOP24
88 % (Analog input mode, VDDP=VDDA=5.0V, RL=8Ω, Po=1.5W)
・Distortion Rate (THD+N)
0.03 % (Analog input mode, VDDP=VDDA=5.0V, RL=8Ω, Po=0.65W)
・S/N Ratio
99dB (Analog input mode, VDDP=VDDA=5.0V, Gain[1:0]=L,L)
・Over-current Protection function
・Thermal Protection function
・Low voltage Malfunction Prevention function
・Power-down function by PDN terminal
・Power-down High speed Recovery function
・Package
Lead-free 25-ball WLCSP (YDA139-WZ)
Lead-free 24-pin SSOP (YDA139-EZ)
YDA139 CATALOG
CATALOG No.:LSI-4DA139A30
2006.2
1 page YDA139
■Description of operating functions
●Digital Amplifier Function
YDA139 has digital amplifiers with analog and digital input, PWM pulse output, Maximum output of 2.5W(RL=4 )×2ch.
Distortion of PWM pulse output signal and noise of the signal is reduced by adopting “Pure Pulse Direct Speaker Drive
Circuit”
First Stage Amplifier Gain Setting Function
YDA139is composed of the first stage amplifier with gain setting control and a 6dB fixed-gain digital amplifier. Gain of the
first stage amplifier can be set by GAIN[1:0] terminal.
Digital Amplifier Gain Setting (Analog Input –Digital Amplifier Output)
GAIN1
GAIN0
Gain
Input Sensitivity
LL
12dB
800mVrms
LH
18dB
400mVrms
HL
21.6dB
250mVrms
HH
26dB
150mVrms
Note) H and L indicates logic High and logic Low, respectively.
Input Impedance(ZIN)
100kΩ
66.3kΩ
50kΩ
33.3kΩ
Connect a 0.01µF or more capacitor to the audio signal input terminals (LIN and RIN) for the rejection of DC signal.
The input low region cutoff frequency is calculated by 1/(2×π×ZIN×CIN).
When GAIN[0:1]=L,L and CIN=0.01µF, the input low region cutoff frequency becomes 159Hz.
And, half voltage (VREF) of AVDD terminal voltage is output to the reference voltage terminals (VREF). Connect a 1µF or
more capacitor to the terminals for voltage stabilization.
*When the input low region cutoff frequency is lowered, capacitor that is larger than 0.01µF (max. 0.1µF) can be
connected. However, please note the following points.
(1) The pop noise when the power supply is disconnected might become large. Therefore, correspond by following method.
①After PDN terminal change to "L", disconnect power supply.
②VREF capacitor is set to CREF=CIN×20[µF].
(2) The recovery time from the power down becomes long. (Refer to the item "Power Down Function" for relation between
the recovery time tPDR and CIN and CREF.)
●DAC Function
YDA139 includes a stereo DAC with 44.1kHz, 48kHz/16bit. The output of DAC is amplified by the digital amplifier to
www.DataoSuhtpeuett4tUo.csopmeakers. The digital signal input supports the following format.
Gain from DAC output to the digital amplifier output is fixed to 12dB. The full scale voltage (VFS) of DAC is depending on
AVDD terminal voltage (VDDA) and can be found with the following formula: VFS=VDDA×0.56.
VFS is amplified 12dB, and it becomes an amplifier output. For example, VFS=1.68V and amplifier output (BTL) =6.72Vpp
at VDDA=3V.
Do not input the DC signal to YDA139 because built-in DAC doesn't have the DC cutting function. And, do not stop each
clock of SCLK, LRCLK and SDIN at the digital input mode and mixing mode.
Digital Signal Input Format (16-bit format with left-justified and a one bit clock delay).
5
5 Page YDA139
●AC characteristics (VSS=0V, VDDP= VDDA =2.7V to 5.25V, Ta=-20ºC to 85ºC, unless otherwise specified)
Item
Symbol
Min.
Typ.
Max.
Unit
SCLK frequency
1/TSCK*5)
-
3.07
- MHz
SCLK Hi time
TSCKH
40
-
- ns
SCLK Lo time
TSCKL
40
-
- ns
SDIN input set-up time
TSDS
60
-
- ns
SDIN input hold time
TSDH
25
-
- ns
LRCLK input set-up time
TLRS
60
-
- ns
LRCLK input hold time
TLRH
25
- ns
Note) *5:1/TSCLK=32Fs~64Fs(Fs=44.1kHz, 48kHz)
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11 Page |
Páginas | Total 18 Páginas | |
PDF Descargar | [ Datasheet YDA139.PDF ] |
Número de pieza | Descripción | Fabricantes |
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