HT82V73A 1500mW Audio Power Amp with Shutdown

HT82V73A
1500mW Audio Power Amp with Shutdown
Features
Applications
• Operating voltage: 2.2V to 5.5V
• Wide range of audio applications
• High signal-to-noise ratio
• Low distortion
General Description
• Large output voltage swing
The HT82V73A is an integrated class AB mono
speaker driver contained in an SOP 8-pin package.
The device is capable of delivering 1500mW of
output power into an 8Ω load with less than 10%
(THD+N) distortion from a 5V power supply. When
in the shutdown mode the very low standby current
is an important feature for a wide range of battery
powered audio applications.
• Low power consumption
• Output power 1500mW at 10% THD+N into 8Ω
(VDD=5V)
• Wide temperature operating range
• Low power-on and chip enable or disable POP noise
• Low standby current
• Power off control
• Can directly drive speakers
• 8-pin SOP package
Block Diagram
Pin Assignment
O U T N
1
A u d In
2
V R E F
3
V S S
4
8
V D D
7
O U T P
6
N C
5
C E
G N D
P A D
Rev. 1.00
1
October 16, 2014
HT82V73A
1500mW Audio Power Amp with Shutdown
Pin Description
Pin No.
Pin Name
I/O
1
OUTN
O
Negative output
Description
2
Aud In
I
Audio input
3
VREF
O
Speaker non-inverting input voltage reference
4
VSS
—
5
CE
I
6
NC
—
Not connected
7
OUTP
O
Positive output
8
VDD
—
Positive power supply
Negative power supply, ground
Chip enable, low active
PCB Layout Consideration
It is desirable to maximize the PCB cooper area connecting to GND/EPAD pin to achieve the best thermal
performance, if the board space allowed, a ground plane is highly desirable.
Absolute Maximum Ratings
Supply Voltage.......................... VSS−0.3V to VSS+6.0V
Input Voltage.............................VSS−0.3V to VDD+0.3V
Storage Temperature........................... −50°C to 125°C
Operating Temperature......................... −40°C to 85°C
Note: These are stress ratings only. Stresses exceeding the range specified under ″Absolute Maximum Ratings″
may cause substantial damage to the device. Functional operation of this device at other conditions beyond
those listed in the specification is not implied and prolonged exposure to extreme conditions may affect
device reliability.
Rev. 1.00
2
October 16, 2014
HT82V73A
D.C. Characteristics
Symbol
VDD
Parameter
Supply Voltage
Ta=25°C, VDD=5V, VSS=0V (unless otherwise noted)
Test Conditions
VDD
Conditions
—
—
3V
IDD
Quiescent Power Supply Current
ISD
Shut-down Power Supply Current
5V
VIH
Input High Voltage for CE
—
VIL
Input Low Voltage for CE
—
5V
Min.
Typ.
Max.
2.2
5.0
5.5
V
1
3
7
mA
VIN=0V, No load
2
4
8
mA
—
—
1
µA
—
0.7VDD
—
VDD
V
—
0
—
0.3VDD
V
—
600
—
—
400
—
—
250
—
—
780
—
—
550
—
—
300
—
—
1850
—
—
1200
—
—
700
—
—
2350
—
—
1500
—
—
850
—
VIN=0V, CE=VDD, No load
RL=4Ω
3V
PO
Output Power
(THD+N)/S<1%,
RL=8Ω
VIN=1kHz sinewave
RL=16Ω
RL=4Ω
(THD+N)/S<10%,
RL=8Ω
VIN=1kHz sinewave
RL=16Ω
RL=4Ω
5V
(THD+N)/S<1%,
RL=8Ω
VIN=1kHz sinewave
RL=16Ω
RL=4Ω
(THD+N)/S<10%,
RL=8Ω
VIN=1kHz sinewave
RL=16Ω
A.C. Characteristics
Symbol
tWake
(THD+N)/S
S/N
Parameter
Wake-up Time
Min.
Conditions
VDD
mW
Typ. Max. Unit
CL=0.1µF
—
100
—
ms
CL=1µF
—
150
—
ms
CL=10µF
—
175
—
ms
RL=4Ω
—
0.5
—
%
RL=8Ω
—
0.2
—
%
RL=16Ω
—
0.17
—
%
RL=4Ω
—
71
—
dB
5V VO=1Vrms 1kHz sinewave RL=8Ω
—
72.5
—
dB
—
73.5
—
dB
5V RL=8Ω
RL=16Ω
Rev. 1.00
1.00
mW
Ta=25°C, VDD=5V, VSS=0V (unless otherwise noted)
Test Conditions
Total Harmonic Distortion plus.
Output power = 500mW,
5V
Noise-to-signal Ratio
VIN=1kHz sinewave
Signal to Noise Ratio
Unit
3
October 16, 2014
HT82V73A
Functional Description
For battery based applications, power consumption is
a key issue, therefore the amplifier should be turned
off when in the standby state. In order to eliminate
any speaker sound bursts while turning the amplifier
on, the application circuit, which will incorporate
a capacitance value of C1, should be adjusted in
accordance with the speaker′s audio frequency
response. A greater value of C1 will improve the
noise burst while turning on the amplifier. The
recommended operation sequence is:
OUTP Rising Time (tR)
When CE is active low, the device requires a certain
time before it can output its full power on the OUTP
pin. This time is dependent upon the value of C1. (*see
the application circuits)
Turn On: "Aud In" signal standby (1/2VDD)→enable
amplifier→wait t R for amplifier ready→"Aud In"
signal start
Turn Off: "Aud In" signal finish → disable amplifier
→ wait tR for amplifier off → "Aud In" signal off
Capacitor
tR
Voltage
0.1µF
1µF
4.7µF
10µF
2.2V
15ms
30ms
90ms
185ms
3.0V
15ms
30ms
90ms
185ms
4.0V
15ms
30ms
90ms
185ms
If the application is not powered by batteries and there
is no problem with amplifier On/Off issue, a capacitor
value of 0.1µF for C1 is recommended.
THD+N vs. Output Power @ VDD=3V & 5V
RLOAD=4Ω, VIN=1kHz sinewave
VDD=3V
Rev. 1.00
4
VDD=5V
October 16, 2014
HT82V73A
RLOAD=8Ω, VIN=1kHz sinewave
VDD=3V
VDD=5V
RLOAD=16Ω, VIN=1kHz sinewave
VDD=3V
Rev. 1.00
5
VDD=5V
October 16, 2014
HT82V73A
Application Circuits
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Rev. 1.00
6
October 16, 2014
HT82V73A
Package Information
Note that the package information provided here is for consultation purposes only. As this information may be
updated at regular intervals users are reminded to consult the Holtek website for the latest version of the package
information.
Additional supplementary information with regard to packaging is listed below. Click on the relevant section to be
transferred to the relevant website page.
• Further Package Information (include Outline Dimensions, Product Tape and Reel Specifications)
• Packing Meterials Information
• Carton information
Rev. 1.00
7
October 16, 2014
HT82V73A
8-pin SOP (150mil) Outline Dimensions
Symbol
Dimensions in inch
Min.
Nom.
A
—
0.236 BSC
—
B
—
0.154 BSC
—
Max.
0.020
C
0.012
—
C′
—
0.193 BSC
—
D
—
—
0.069
E
—
0.050 BSC
—
F
0.004
—
0.010
G
0.016
—
0.050
H
0.004
—
0.010
α
0°
—
8°
Symbol
Rev. 1.00
Dimensions in mm
Min.
Nom.
Max.
A
—
6.00 BSC
—
B
—
3.90 BSC
—
C
0.31
—
0.51
C′
—
4.90 BSC
—
D
—
—
1.75
E
—
1.27 BSC
—
F
0.10
—
0.25
G
0.40
—
1.27
H
0.10
—
0.25
α
0°
—
8°
8
October 16, 2014
HT82V73A
Copyright© 2014 by HOLTEK SEMICONDUCTOR INC.
The information appearing in this Data Sheet is believed to be accurate at the time
of publication. However, Holtek assumes no responsibility arising from the use of
the specifications described. The applications mentioned herein are used solely
for the purpose of illustration and Holtek makes no warranty or representation that
such applications will be suitable without further modification, nor recommends
the use of its products for application that may present a risk to human life due to
malfunction or otherwise. Holtek's products are not authorized for use as critical
components in life support devices or systems. Holtek reserves the right to alter
its products without prior notification. For the most up-to-date information, please
visit our web site at http://www.holtek.com.tw.
Rev. 1.00
9
October 16, 2014