YDA168B
D-4H3B
MONO 3.3W Non-Clip DIGITAL AUDIO POWER AMPLIFIER
„ General Description
YDA168B (D-4H3B) is an integrated circuit with Max.3.3W (RL=4Ω)×1ch Class-D speaker
amplifier. This speaker amplifier uses the filter-less method allowing a speaker to be directly
connected to the output and features low-level distortion and noise characteristics.
The speaker amplifier, having Yamaha original Power Limit Interlock Non-Clip function, controls
Gain automatically and prevents output signals from being clipped at the supply voltage. In
addition, this power limit function permits the maximum output to be arbitrarily specified to 100mW
to 1000mW according to a speaker to use.
Furthermore, this amplifier has the following functions: overcurrent and overtemperature
protection functions, DC output protection function, under-voltage malfunction prevention function,
as well as EMI noise and the pop noise reduction functions and High PSRR function.
2.5V～5.25V
MONO
Differential
+8dB
PWM
Output Buffer
+10dB
5V
3.3W at
BTL
YDA168B (D-4H3B)
4Ω～
CTRL
PL
Non-Clip + Power Limit
Power-Down Control
Circuit Protection
YDA168B Simplified Diagram
YDA168B CATALOG
CATALOG No.: LSI-4DA168B20
2010.9
YDA168B
„ Features
・Supply Voltage
VDD
2.5V to 5.25V
・Input
Mono (Differential)×1
・Output
Speaker ( Class-D, BTL)
・Maximum Output
3.3 W×1ch
0.93 W×1ch
1.00 W×1ch
0.75 W×1ch
(VDD = 5.0 V, RL = 4 Ω, THD+N = 10 %, TA = 25 °C)
(VDD = 3.6 V, RL = 8 Ω, THD+N = 10 %, TA = 25 °C)
(VDD = 4.2 V, RL = 8 Ω, THD+N = 1 %, TA = 25 °C)
(VDD = 3.6 V, RL = 8 Ω, THD+N = 1 %, TA = 25 °C)
・Maximum Output
(Non-Clip)
2.4 W×1ch
0.70W×1ch
(VDD = 5.0 V, RL = 4 Ω, THD+N = 1 %, TA = 25 °C)
(VDD = 3.6 V, RL = 8 Ω, THD+N = 1 %, TA = 25 °C)
・Distortion (THD+N) 0.045 %
(VDD = 3.6 V, RL = 8 Ω, PO = 0.40 W, 1kHz)
・Residual Noise
50 μVrms
(VDD = 3.6 V, RL = 8 Ω)
・S/N Ratio
97.2 dB
(VDD = 5.0 V, RL = 4 Ω)
・PSRR
75 dB
(VDD = 3.6 V, RL = 8 Ω, f = 217 Hz)
・Efficiency
90 %
(VDD = 3.6 V, RL = 8 Ω, PO = 0.8 W)
・NCPL (Power Limit interlock Non-Clip function)
・Protection Function
Overcurrent Protection Function (OCP)
Overtemperature Protection Function (OTP)
DC Output Protection Function (DCOP)
Under-voltage Malfunction Prevention Function (UVL)
・Power-down Function
・High Speed Startup
・Pop Noise Reduction
・EMI Noise Reduction
・Lead-free Package
2
9-ball WLCSP (YDA168B-PZ)
LSI-4DA168B20
YDA168B
„ NCPL (Power Limit Interlock Non-Clip) Function
NCPL function allows Non-Clip function to be enabled even though the power limit setting is performed.
Non-Clip function automatically controls the PWM amplifier gain so as not to clip the output signals
even if the speaker output is clipped at the supply voltage. This control, following the supply-voltage
fluctuation, has an effect also on the case that a supply voltage fluctuates, such as a battery etc. And,
Power Limit function, allowing a limiting level (Max. Output) to be arbitrarily set, is available for speaker
overload protection etc.
Non-Clip
+ Power Limit
Non-Clip
Old Amp.
VDD
hold
ThrCeonstrolled .
is
NCPL (Power Limit Interlock Non-Clip) Conceptual Diagram
„ Examples of Effects of using Non-Clip Function
Previously, when using a device in an application where the supply voltage may fluctuate, the
source volume had been set so as not to distort the sound even at the minimum voltage.
But, Non-Clip function allows source volume to be set based on the maximum voltage without
regard for distortion. This function automatically controls the gain according to the variation of a
supply voltage; therefore, this is an optimum function for an application that needs a sound
pressure level to some extent, such as a case using a small speaker, because the sound pressure
♪ Loud
is increased.
Output
(4.2V)
Increase of Sound Pressure:
No distortion occurs even if the
voltage is decreased.
(3.3V)
YDA168B
Usual Case
♪
Max.
Lowering of
Supply Voltage
Min.
Soft
♪
g
sin
a
e
r
Inc
dP
un
o
S
re
su
s
e
r
♪
[W]
Setting the source volume to the Min. value of the battery voltage:
The volume could not be increased even at a higher voltage.
Output
Increase of Sound Pressure using Non-Clip Function − Conceptual Diagram
Example of Sound Pressure Increase: Music Source
Non-Clip
Usual
The volume had been set to the
max. amplitude.
Increase of sound pressure
with no distortion.
Actually Measured Sound Power Limit Function
LSI-4DA168B20
3
YDA168B
„ Examples of Effects of using Power Limit Function
Power Limit function is a function provided for the purpose of reducing the overload on a speaker
and limits the output power *1. Any power limit level, ranging from 100mW to 1000mW, can be
freely set. Even if an excessive signal is input, Non-Clip function automatically controls PWM
amplifier gain to keep the maximum output power to a constant level. And, when PL pin is
connected to GND, the output is set to 0.60W (RL = 8 Ω).
*1: This function does not guarantee 100% speaker protection.
VDD
Power Limit Level
Max. THD ≦ 1%(Typ.)
Power Limit – Conceptual Diagram
Power Limit Example: Music Source
Power Limit OFF
Controlled to the maximum output
0.3W even in an excessive input.
Power Limit = 0.3W(8Ω)
Power Limit = 0.1W(8Ω)
Controlled to the maximum output
0.1W even in an excessive input.
Actually-measured output power for each power limit value
4
LSI-4DA168B20
YDA168B
„ Quick Start/Quick Mute Function
Pop noise reduction circuit (Quick Start/Quick Mute） operates at startup or shutdown of the
speaker amplifier.
This is a function to vary ON/OFF envelopes at a slow rate. Even a high-speed ON/OFF operation,
this reduces intermittent sound considerably and eliminates uncomfortable feeling.
That is, Quick Start/Quick Mute is a pop noise reduction function with Non-Clip technique applied.
5msec/div
LSI-4DA168B20
5msec/div
5
YDA168B
„ Block Diagram
VDD
YDA168B (D-4H3B)
OUT+
IN+
Input Buffer
(+8dB)
PWM
Output Buffer
(+10dB)
OUT-
IN-
CTRL
Circuit
Protection
Non-Clip
&
Power Limit
Control
Startup
&
Control
OCP
OTP
DCOP
UVL
PL
AGND
PGND
YDA168B Block Diagram
„ Pin Arrangement
3
OUT+
PGND
OUT-
2
VDD
PL
CTRL
1
IN+
AGND
IN-
A
B
C
Pin Assignment (Top View)
6
LSI-4DA168B20
YDA168B
„ Pin Function
No.
Name
I/O
Function
A1
IN+
IA
A2
VDD
Power
A3
OUT+
O
B1
AGND
GND
B2
PL
IA
B3
PGND
GND
C1
IN－
IA
Differential Input Pin (negative)
C2
CTRL
IA
Power-down and Non-Clip setting pin
C3
OUT－
O
Speaker Output Pin (negative)
Differential Input Pin (positive)
(Note1, 2)
Power Supply Pin
Speaker Output Pin (positive)
Ground for Analog Circuits
Power Limit Setting Pin
(Note1)
Ground for Output Circuits
(Note1, 2)
I: Input Pin, O: Output Pin, A : Analog Pin
Note 1: Note that leakage current flows through the protection circuit (PMOS Tr.) when applying a
voltage higher than VDD to this pin.
Note 2: When using a D/A Converter output with Noise-Shaping in the former stage, input a signal
whose signal components outside the audible frequency have been sufficiently attenuated (e.g.
90dBV at the frequency ranging from 150 kHz to 320 kHz). Otherwise, Beat Noise (i.e. noise
caused by interference between two frequencies) may occur because of signal components in
the same band as internal clocks used for PWM modulation.
LSI-4DA168B20
7
YDA168B
„ Electrical Characteristics
Absolute Maximum Ratings Note)
Item
Symbol
Condition
Min.
Max.
Unit
Supply Voltage Range
VDD
-
– 0.3
6.0
V
Input Pin Voltage Range
VIN
IN +, IN –
VGND – 0.6
VDD + 0.6
Other input pins
VGND – 0.3
VDD + 0.3
Power Dissipation
PD25
TA=25 °C *1)
PD70
TA=70 °C
*1)
PD85
TA=85 °C
*1)
V
1.66
-
0.91
W
0.66
Junction Temperature
Tjmax
-
-
125
ºC
Storage Temperature
TSTG
-
– 50
125
ºC
Speaker Impedance
RLS
-
3.2
-
Ω
Note) Absolute Maximum Ratings are values which must not be exceeded to guarantee device reliability and life,
and when using a device in excess of the ratings for even a moment, it may immediately cause damage to
the device or may significantly deteriorate its reliability. In the system where the voltage at an input pin may
exceed the supply voltage (VDD / GND), use an external diode etc. to limit it to the value lower than absolute
maximum rating.
* 1: θja = 60 °C/W
(4-layer board, No wind, Copper Foil Thickness 35 μm, Wiring Density 326 %, Board Size 100 mm × 80 mm)
Recommended Operating Conditions
Item
Symbol
Condition
Min.
Typ.
Max.
Supply Voltage
VDD
Operating Ambient Temperature
TA
Unit
-
2.5
3.6
5.25
V
-
– 40
25
85
ºC
Note) Be sure to use the device within the recommended operating conditions.
Be sure to connect all AGND and PGND pins on a board.
The slew rate should be less than 1V/μsec when turning on the power.
Consumption Current
(VDD = 3.6V, VGND = 0V, TA = 25 °C, CTRL = VMOD3, PL = VDD, RL = 8Ω, unless otherwise specified)
Symbol
Condition
Min.
Typ.
Max.
Unit
Consumption Current
IDD
No input, No load
-
5.3
-
mA
Power-down Mode
Consumption Current
IPD
CTRL=VMOD4
-
0.5
-
μA
Item
Note) In the measurement conditions with RL = 8Ω, 8Ω (pure resistor) + 30μH is used.
8
LSI-4DA168B20
YDA168B
DC Characteristics
(VDD = 2.5V to 5.25V, VGND = 0V, TA = – 40 °C to 85 °C, PL = VDD, unless otherwise specified)
Symbol
Condition
Min.
Typ.
Max.
Unit
Startup Threshold Voltage
VUVLH
-
-
2.2
-
V
Startup Threshold Voltage
VUVLL
-
-
2.0
-
V
Non-Clip A
VMOD1
-
1.5
1.6
VDD
V
Non-Clip B
VMOD2
-
1.0
1.18
1.35
V
Non-Clip OFF
VMOD3
-
0.65
0.75
0.85
V
Power-down
VMOD4
-
VGND
-
0.1
V
Power Limit OFF
VPDIS
-
0.8×VDD
-
VDD
V
Power Limit
Enable Mode
VPENA
-
0.45
-
0.7×VDD
V
Power Limit
Fix Mode
VPFIX
-
0
-
0.1
V
High Temperature Protection Function
Activated Temperature
TOTPH
-
-
150
-
ºC
High Temperature Protection Function
Released Temperature
TOTPL
-
-
120
-
ºC
Input leakage Current
ICTRL
CTRL pin
– 1.0
-
-
μA
Item
CTRL Control Pin
Input Threshold
Voltage
PL Pin
Input Threshold
Voltage
AC Characteristics
(VDD = 2.5V to 5.25V, VGND = 0V, TA = – 40 °C to 85 °C, CTRL = VMOD3, PL = VDD, unless otherwise specified)
Symbol
Condition
Min.
Typ.
Max.
Unit
Startup Time (Power-down Cancel)
TSTUP
-
-
20
-
msec
Power-down Setting Time
TPDWL
-
25
-
-
msec
Active Setting Time
TPDWH
-
45
-
-
msec
DC Error Detection Voltage
VDCDET
VDD = 3.6V
-
0.3
-
V
DC Error Detection Time
TDCDET
-
-
1.0
-
sec
Input Cut-off Frequency
fc
CIN = 1.0μF, RIN = 0
Hz
Item
Non-Clip A
Non-Clip B
Attack Time
TATA
Release Time
TRLA
Attack Time
TATB
Release Time
TRLB
Carrier Clock Frequency
FPWM
*1
CTRL = VMOD1
CTRL = VMOD2
-
-
16
-
-
0.5
-
-
380
-
-
0.1
-
-
380
-
-
500
-
msec/dB
msec/dB
kHz
*1: CIN : DC-cut capacitor at the input stage, RIN : External resistor for setting Gain
LSI-4DA168B20
9
YDA168B
Analog Characteristics
(VDD = 3.6V, VGND = 0V, TA = 25 °C, CTRL = VMOD3, PL = VDD, AV = 18dB, RL = 8Ω, 1kHz, sine wave,
unless otherwise specified)
Item
Symbol
Condition
VDD = 5.0V, RL = 4Ω, THD = 10%
Maximum Output
Non-Clip Maximum Output
Power Limit Output
Voltage Gain
Total Harmonic Distortion
Residual Noise
S/N Ratio
PSRR
Efficiency
Output Offset Voltage
Frequency
Characteristics
*1: CIN
PO
PONC
Min.
Typ.
Max.
-
3.3
-
VDD = 3.6V, RL = 8Ω, THD = 10%
-
0.93
-
VDD = 4.2V, RL = 8Ω, THD = 1%
-
1.00
-
VDD = 3.6V, RL = 8Ω, THD = 1%
-
0.75
-
VDD = 5.0V, RL = 4Ω
CTRL = VMOD1
-
2.4
-
Unit
W
W
VDD = 3.6V, RL = 8Ω
CTRL = VMOD1
-
0.70
-
POPL
PL = 0V (Fix Mode)
-
600
-
mW
AV
-
-
18
-
dB
THD+N
PO = 0.40W, 1kHz
BW : 20kHz
-
0.045
-
%
N
BW : 20kHz, A-Filter
-
50
-
μVrms
-
97.2
-
dB
VDD = 5.0V, RL = 4Ω
BW : 20kHz, A-Filter
SNR
PSRR
f = 217Hz, Vripple = 0.1Vpp
-
75
-
dB
η
PO = 0.8W
-
90
-
%
VO
-
-
±3
-
mV
Fres
CIN = 1.0 μF
100Hz to 20kHz
– 0.4
-
0.4
dB
*1
: DC-cut capacitor at the input stage
Note) All analog characteristics were obtained by using Yamaha evaluation board. Depending upon pattern layout
etc., its characteristics may vary.
In the measurement conditions with RL = 8Ω, 8Ω (pure resistor) + 30μH is used.
10
LSI-4DA168B20
YDA168B
„ Package Dimensions
注）
1. 表面実装LSIは、保管条件、および、半田付けについての特別な配慮が必要です。
2. 組立工場により、寸法や形状などが異なる場合があります。
詳しくはヤマハ代理店までお問い合わせください。
Note: 1. Special attention needs to be paid to the storage conditions and soldering method of the
surface mount IC.
2. Dimension, form, etc. may differ depending on assembly plants.
For details, please contact your local Yamaha agent.
LSI-4DA168B20
11
YDA168B
„ Application Example
2.5V ～ 5.25V
(10μF)
RL < 8Ω or VDD > 4.5V
A2
1μF
VDD
YDA168B (D-4H3B)
Input
terminal
Input
terminal
A1
IN+
0.1μF
C1
Input Buffer
(+8dB)
OUT+
A3
OUT-
C3
Output Buffer
(+10dB)
PWM
IN-
0.1μF
4Ω ～
GPIO
DCV
Input
C2
B2
CTRL
Circuit
Protection
Startup
&
Control
Non-Clip
&
Power Limit Control
PL
PGND
B1
B3
AGND
Differential Input Single-ended Input
External Gain Setting
CIN
CIN
12
OCP
OTP
DCOP
UVL
RIN
RIN
A1
C1
IN+
IN-
LSI-4DA168B20
PRECAUTIONS AND INSTRUCTIONS FOR SAFETY
WARNING
Prohibited
Prohibited
Prohibited
Instructions
Do not use the device under stresses beyond those listed in Absolute Maximum Ratings.
Such stresses may become causes of breakdown, damages, or deterioration, causing explosion
or ignition, and this may lead to fire or personal injury.
Do not mount the device reversely or improperly and also do not connect a supply voltage in
wrong polarity. Otherwise, this may cause current and/or power-consumption to exceed the
absolute maximum ratings, causing personal injury due to explosion or ignition as well as causing
breakdown, damages, or deterioration.
And, do not use the device again that has been improperly mounted and powered once.
Do not short between pins.
In particular, when different power supply pins, such as between high-voltage and low-voltage
pins, are shorted, smoke, fire, or explosion may take place.
As to devices capable of generating sound from its speaker outputs, please design with safety of
your products and system in mind, such as the consequences of unusual speaker output due to a
malfunction or failure. A speaker dissipates heat in a voice-coil by air flow accompanying
vibration of a diaphragm. When a DC signal (several Hz or less) is input due to device failure,
heat dissipation characteristics degrade rapidly, thereby leading to voice-coil burnout, smoking or
ignition of the speaker even if it is used within the rated input value.
CAUTION
Prohibited
Instructions
Instructions
Instructions
Instructions
Instructions
Instructions
Instructions
Do not use Yamaha products in close proximity to burning materials, combustible substances, or
inflammable materials, in order to prevent the spread of the fire caused by Yamaha products, and
to prevent the smoke or fire of Yamaha products due to peripheral components.
Generally, semiconductor products may malfunction and break down due to aging, degradation,
etc. It is the responsibility of the designer to take actions such as safety design of products and
the entire system and also fail-safe design according to applications, so as not to cause property
damage and/or bodily injury due to malfunction and/or failure of semiconductor products.
The built-in DSP may output the maximum amplitude waveform suddenly due to malfunction from
disturbances etc. and this may cause damage to headphones, external amplifiers, and human
body (the ear). Please pay attention to safety measures for device malfunction and failure both in
product and system design.
As semiconductor devices are not nonflammable, overcurrent or failure may cause smoke or fire.
Therefore, products should be designed with safety in mind such as using overcurrent protection
circuits to control the amount of current during operation and to shut off on failure.
Products should be designed with fail safe in mind in case of malfunction of the built-in protection
circuits. Note that the built-in protection circuits such as overcurrent protection circuit and
high-temperature protection circuit do not always protect the internal circuits. In some cases,
depending on usage or situations, such protection circuit may not work properly or the device
itself may break down before the protection circuit kicks in.
Use a robust power supply.
The use of an unrobust power supply may lead to malfunctions of the protection circuit, causing
device breakdown, personal injury due to explosion, or smoke or fire.
Product's housing should be designed with the considerations of short-circuiting between pins of
the mounted device due to foreign conductive substances (such as metal pins etc.). Moreover,
the housing should be designed with spatter prevention etc. due to explosion or burning.
Otherwise, the spattered substance may cause bodily injury.
The device may be heated to a high temperature due to internal heat generation during
operation. Therefore, please take care not to touch an operating device directly.
v02