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YAMAHA CORPORATION
YAMAHA CORPORATION

YDA135 Datasheet

STEREO 5W-20W DIGITAL AUDIO POWER AMPLIFIER CONTROLLER


YDA135 Datasheet Preview


YDA135
D-20
STEREO 5W-20W DIGITAL AUDIO POWER AMPLIFIER CONTROLLER
Outline
YDA135 is digital audio power amplifier controller IC that is output power of 20W/channel on a 12V power supply
operation.
This IC is combined with the general purpose Power MOSFET (hereafter called Power MOSFET) that are
connected through BTL can configure an audio power amplifier with output power of 5W or 20W.
This IC accepts analog signal, converts it into digital pulse signal by the digital modulation circuitry and outputs
the digital pulse signal for driving Power MOSFET. The Power MOSFET that is driven by this IC outputs large
current digital pulses. The digital pulse signal is converted to audio signal through an external low pass filter, and
sent to the speakers.
By using a general purpose Power MOSFET, very low cost digital amplifier system is configured. By adapting
Yamaha's proprietary modulation system, the device provides low distortion and high signal to noise ratio at the
highest level among digital amplifiers in the equiralent class.
This IC has the overcurrent detection function that detects overcurrent state by voltage drop of external resistors
that detects the output current.
This IC has the high temperature detection function that detects high temperature by resistor value change of
external element that detects temperature.
The operation of this IC is limited by using two control signal, SLEEP or MUTE. SLEEP signal stops all functions
of this IC, and restrain to the power consumption at the minimum. MUTE signal brings Power MOSFET into
nonconductive state, and mute the output of the device.
This IC is configured by two power supply ; 5V for signal processing circuits, and 12V for Power MOSFET driving
circuits.
Features
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・High output power
  20W @ VDDP=12.0V RL=4Ω THD+N<10%
・High efficiency operation
  80 % @ VDDP=12.0V RL=4Ω Po=20W
  85 % @ VDDP=12.0V RL=8Ω Po=10W
・Low distortion(THD+N)
  0.03 % @ 1kHz RL=4Ω Po=7W
・High signal to noise ratio
  100 dB @ VDDP=12.0V Input sensitivity1.0V RL=4Ω
  97 dB @ VDDP=12.0V Input sensitivity150mV RL=4Ω
・Low consumption current (12V/5V power supply)
When Power MOSFET (FW332) is connected.
  30mA /7mA @ VDDP=12.0V no signal
  0.1mA/7mA @ VDDP=12.0V at mute
   1μA/1μA @ VDDP=12.0V at sleep
・CS(Channel separation)
  80 dB @ 1kHz
・Any gain setting by external resistors
・Sleep function by SLEEP terminal
・Output mute function by MUTE terminal
・Over current detection function
(Power supply short-circuiting, Ground short-
circuiting, Load short-circuiting)
・High temperature detection function
・Pop noise suppression function at turn-on and
turn-off
・48-pin plastic LQFP (YDA135-VZ)
YDA135CATALOG
CATALOG No.:LSI-4DA135A2
2003.3
Page 1

Terminal configuration
YDA135-VZ
YDA135
SENSENL
PVDDL
SENSEPL
N/C
CDIL
CDOL
N/C
NFNL
NFPL
NFINL
INL
VDDL
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37
38
39
40
41
42
43
44
45
46
47
48
24 SENSENR
23 PVDDR
22 SENSEPR
21 N/C
20 CDIR
19 CDOR
18 N/C
17 NFNR
16 NFPR
15 NFINR
14 INR
13 VDDR
<48 pin LQFP Top View>
2
Page 2

YDA135
Terminal function
No. Name
I/O
Function
1 N/C
Non connection
2 VREFL
O L channel reference voltage output
3 VSSL
Ground for 5V power supply of L channel
4 MUTE
I Mute control
5 SLEEP
I Sleep control
6 PROT
O Warning signal output for detection function
7 N/C
Non connection
8 TPP
I High temperature detection
9 TEST
I IC test. Connect to VSSR
10 VSSR
Ground for 5V power supply of R channel
11 VREFR
O R channel reference voltage output
12 N/C
Non connection
13 VDDR
5V Power supply of R channel
14 INR
I R channel analog signal input
15 NFINR
O R channel input gain setting
16 NFPR
I R channel positive side feedback input
17 NFNR
I R channel negative side feedback input
18 N/C
Non connection
19 CDOR
O R channel off time setting (output)
20 CDIR
I R channel off time setting (input)
21 N/C
Non connection
22 SENSEPR
IH R channel overcurrent detection (PVDD side)
23 PVDDR
24 SENSENR
12V power supply of R channel
IH R channel overcurrent detection (PVSS side)
25 PVSSR
26 N/C
27 HP_R
Ground for 12V power supply of R channel
Non connection
OH R channel positive side PMOS driving
28 HN_R
www.DataSh2e9et4U.cLoNm_R
OH R channel positive side NMOS driving
OH R channel negative side NMOS driving
30 LP_R
OH R channel negative side PMOS driving
31 LP_L
OH L channel negative side PMOS driving
32 LN_L
OH L channel negative side NMOS driving
33 HN_L
OH L channel positive side NMOS driving
34 HP_L
OH L channel positive side PMOS driving
35 N/C
36 PVSSL
37 SENSENL
Non connection
Ground for 12V power supply of L channel
IH L channel overcurrent detection (PVSS side)
38 PVDDL
12V power supply of L channel
39 SENSEPL
IH L channel overcurrent detection (PVDD side)
40 N/C
41 CDIL
Non connection
I L channel off time setting (input)
42 CDOL
O L channel off time setting (output)
43 N/C
44 NFNL
Non connection
I L channel negative side feedback input
45 NFPL
I L channel positive side feedback input
46 NFINL
O L channel input gain setting
47 INL
I L channel analog signal input
48 VDDL
5V power supply of L channel
Note. I/O: 5V input/ 5V output, IH/OH: 12V input/12V output
3
Page 3
Part Number YDA135
Manufactur YAMAHA CORPORATION
Description STEREO 5W-20W DIGITAL AUDIO POWER AMPLIFIER CONTROLLER
Total Page 22 Pages
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