POWER AMPLIFIER. YDA137 Datasheet

YDA137 Datasheet PDF, Equivalent


Part Number

YDA137

Description

STEREO 5W DIGITAL AUDIO POWER AMPLIFIER

Manufacture

YAMAHA CORPORATION

Total Page 20 Pages
PDF Download
Download YDA137 Datasheet


YDA137 Datasheet
YDA137
D- 2
STEREO 5W DIGITAL AUDIO POWER AMPLIFIER
Overview
YDA137 (D-2) is a high efficient digital audio power amplifier IC that operates on a single 5V power supply.
With YDA137 in BTL connection, an audio power amplifier with a maximum output of 5W (RL=2Ω)×2ch can be
configured with one chip.
YDA137 converts an input analog data into a digital pulse by the digital modulation circuit in the IC and outputs a high
current digital pulse from the output buffer circuit. This digital pulse signal is converted into an audio signal by an
external low-pass filter and is output to the speaker.
Low-distortion rate characteristics and high S/N ratio are realized as a digital amplifier among same class, by adopting
Yamaha’s unique modulation system.
In addition, class AB headphone amplifier with output of 20mW (RL=16Ω)×2ch is embedded and switching between
digital amplifier output and headphone amplifier output can be done by the control of terminal termination.
YDA137 has the over-current protection function for speaker terminals, the high-temperature protection function for IC,
and the pop noise rejection function.
IC operation can be restricted by the two control signals of /SLEEP and /MUTE. /SLEEP signal can stop all functions and
decrease the consumption power to a minimum. In addition, /MUTE signal can pull-down the output buffer (hereinafter,
described as WL) and make the output mute.
Features
High Output Power
5.0 W VDD=5.0V, RL=2Ω, THD+N<10%
3.7 W VDD=5.0V, RL=3Ω, THD+N<10%
3.0 W VDD=5.0V, RL=4Ω, THD+N<10%
www.DataShHeeitg4hU.Ecfofmicient Operation
75 % VDD=5.0V, RL=2Ω, Po=5W
80 % VDD=5.0V, RL=3Ω, Po=3W
Low Distortion Rate (THD+N)
0.03 % 1kHz, RL=2Ω, Po=2.5W
0.02 % 1kHz, RL=3Ω, Po=1.5W
High S/N Ratio
105dB VDD=5.0V, input sensitivity 1.0Vrms,
RL=2Ω, Po=5W
98dB VDD=5.0V, input sensitivity 150mVrms,
RL=2Ω, Po=5W
IC Low Consumption Current
25 mA VDD=5.0V, no signal (no filter)
10 mA VDD=5.0V, at mute
1 µA VDD=5.0V, at sleep
CS(Channel Separation)
80dB 1kHz
Class AB headphone amp. is embedded.
20mW VDD=5.0V, RL=16Ω, THD+N<1.0%
Arbitral gain setting with external resistor is possible.
Sleep function by /SLEEP terminal
Output mute function by /MUTE terminal
Output Over-Current Protection Function
(Ground short-circuit/Load short-circuit)
Over-Temperature Protection Function
Auto Resume Function from Over-Current,
High-Temperature Protection.
Monaural Function by /MONO terminal
Pop Noise Rejection Function at power-up or
power-cutoff.
Analog input / BTL(Bridge-Tied Load) output
28pin plastic TSSOP
pin lead plating with Pd-free (YDA137-AZ)
YDA137 CATALOG
CATALOG No.:LSI-4DA137A30
2005.1

YDA137 Datasheet
Terminal configuration
YDA137
VSS
/MUTE
/MONO
VDDL
VSSPL2
OUTPL
VDDPL
OUTML
VSSPL1
HPOL
VPL
INL
VREFL
VSSL
1
2
3
4
5
6
7
8
9
10
11
12
13
14
28 /SLEEP
27 /PROT
26 HP
25 VDDR
24 VSSPR2
23 OUTPR
22 VDDPR
21 OUTMR
20 VSSPR1
19 HPOR
18 VPR
17 INR
16 VREFR
15 VSSR
Terminal functions
<28pin TSSOP Top View>
No. Name
I/O
Function
1 VSS
Ground terminal for reference power supply
2 /MUTE
I Mute control terminal
3 /MONO
I Monaural control terminal
4 VDDL
L-ch power supply terminal for control stage
5 VSSPL2
L-ch ground terminal for output stage
6 OUTPL
O L-ch PWM signal output terminal for positive side
7 VDDPL
L-ch power supply terminal for output stage
8 OUTML
O L-ch PWM signal output terminal for negative side
www.Data9SheetV4US.ScoPmL1
L-ch ground terminal for output stage
10 HPOL
OA L-ch headphone output terminal
11 VPL
OA L-ch first stage operational amplifier output terminal
12 INL
IA L-ch analog signal input terminal
13 VREFL
OA L-ch reference voltage output terminal
14 VSSL
L-ch ground terminal for control stage
15 VSSR
R-ch ground terminal for control stage
16 VREFR
OA R-ch reference voltage output terminal
17 INR
IA R-ch analog signal input terminal
18 VPR
OA R-ch first stage operational amplifier output terminal
19 HPOR
OA R-ch headphone output terminal
20 VSSPR1
R-ch ground terminal for output stage
21 OUTMR
O R-ch PWM signal output terminal for negative side
22 VDDPR
R-ch power supply terminal for output stage
23 OUTPR
O R-ch PWM signal output terminal for positive side
24 VSSPR2
R-ch ground terminal for output stage
25 VDDR
R-ch power supply terminal for control stage
26 HP
I Headphone control terminal
27 /PROT
O Protection detection terminal
28 /SLEEP
I Sleep control terminal
NoteI: Digital input terminal, O: Digital output terminal, IA: Analog input terminal, OA: Analog output terminal
2


Features Datasheet pdf YDA137 D- 2 STEREO 5W DIGITAL AUDIO POWE R AMPLIFIER ■Overview YDA137 (D-2) is a high efficient digital audio power a mplifier IC that operates on a single 5 V power supply. With YDA137 in BTL conn ection, an audio power amplifier with a maximum output of 5W (RL=2Ω)×2ch can be configured with one chip. YDA137 co nverts an input analog data into a digi tal pulse by the digital modulation cir cuit in the IC and outputs a high curre nt digital pulse from the output buffer circuit. This digital pulse signal is converted into an audio signal by an ex ternal low-pass filter and is output to the speaker. Low-distortion rate chara cteristics and high S/N ratio are reali zed as a digital amplifier among same c lass, by adopting Yamaha’s unique mod ulation system. In addition, class AB h eadphone amplifier with output of 20mW (RL=16Ω)×2ch is embedded and switchin g between digital amplifier output and headphone amplifier output can be done by the control of terminal termination. YDA137 has the over-current pro.
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