NLMD5820
2.65 W Filterless Class-D
Audio Amplifier with
Integrated Dual SPST Switch
The NLMD5820 is an integrated mono Class-D audio power
amplifier and dual SPST switch capable of delivering 2.65 W of
continuous average power to 4.0
W
from a 5.0 V supply in a Bridge
Tied Load (BTL) configuration. Under the same conditions, the output
power stage can provide 1.4 W to a 8.0
W
BTL load with less than 1%
THD+N. For cellular handsets or PDAs it offers space and cost
savings because no output filter is required when using inductive
tranducers. The NLMD5820 incorporates a dual SPST switch which
allows signals to bypass the amplifier. The integrated switch operates
off a separate supply voltage and maintains a very low R
ON
resistance,
0.5
W
max @ 2.8 V V
CC
.
The NLMD5820 processes analog inputs with a pulse width
modulation technique that lowers output noise and THD when
compared to a conventional sigma-delta modulator. The device allows
independent gain while summing signals from various audio sources.
Thus, in cellular handsets, the earpiece, the loudspeaker and even the
melody ringer can be driven with a single NLMD5820. Due to its low
42
mV
noise floor, A-weighted, clean listening is guaranteed no matter
the load sensitivity.
Features
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MARKING
DIAGRAM
16
1
16 PIN UDFN
CASE 517AL
A2A
M
G
A2A M
G
1
= Specific Device Code
= Date Code/Assembly Location
= Pb-Free Package
PIN CONNECTIONS
NC2
IN2
COM2
V
CC
SD
VP
INP
INM
1
2
3
4
5
6
7
8
16
15
14
13
12
11
10
9
GND
NC1
IN1
COM1
OUTM
GND
VP
OUTP
•
Optimized PWM Output Stage: Filterless Capability
•
Efficiency up to 90%
•
•
•
•
•
•
•
•
•
•
•
•
Low 2.5 mA Typical Quiescent Current
Large Output Power Capability: 1.4 W with 8.0
W
Load (CSP) and
THD + N < 1%
Dual SPST with 0.5
W
Max R
ON
@ V
CC
= 2.8 V
High Performance, THD+N of 0.03% @ V
p
= 5.0 V,
R
L
= 8.0
W,
P
out
= 100 mW
Excellent PSRR (-65 dB): No Need for Voltage Regulation
Surface Mounted Package UDFN16
Fully Differential Design. Eliminates Two Input Coupling Capacitors
Very Fast Turn On/Off Times with Advanced Rising and Falling
Gain Technique
External Gain Configuration Capability
Internally Generated 250 kHz Switching Frequency
Short Circuit Protection Circuitry
“Pop and Click” Noise Protection Circuitry
This is a Pb-Free Device
(Top View)
ORDERING INFORMATION
Device
NLMD5820MUTAG
Package
Shipping
†
16 PIN
3000/Tape & Reel
UDFN
(Pb-Free)
Applications
For
information on tape and reel specifications,
including part orientation and tape sizes, please
refer to our Tape and Reel Packaging Specification
Brochure, BRD8011/D.
•
Cellular Phone
•
Portable Electronic Devices
•
PDAs and Smart Phones
©
Semiconductor Components Industries, LLC, 2007
1
September, 2007 - Rev. 0
Publication Order Number:
NLMD5820/D
NLMD5820
2.2
mF
100 nF
R
f
C
i
R
i
INM
BYPASS
Required
for
Filtering
the Audio
Input
Signal
C
i
R
i
INP
V
p
BYPASS
INTERNAL
BIASING
V
p
V
CC
V
p
OUTP
RAMP
GENERATOR
Data
Processor
OUTM
BYPASS
GND
R
f
NC1
Positive
Differential
Input
COM1
NC2
COM2
SD
V
ih
IN2
IN1
V
il
Shutdown
Control
GND
Figure 1. Functional Block Diagram
FUNCTION TABLE
IN 1, 2
0
1
NC 1, 2
ON
OFF
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2
R
L =
8
W
Negative
Differential
Input
NLMD5820
PIN DESCRIPTION
Pin No.
1
2
3
4
5
Symbol
NC2
IN2
COM2
V
CC
SD
Type
I/O
I
I/O
I
I
Normally Closed Signal Line for Switch #2.
Control Input for Switch #2.
Common Signal Line for Switch #2.
Analog Supply for Switches. Range: 1.65 V – 4.5 V.
The device enters in Shutdown Mode when a low level is applied on this pin. An internal 300 kW
resistor will force the device in shutdown mode if no signal is applied to this pin. It also helps to
save space and cost.
Power Analog Positive Supply. Range: 2.5 V – 5.5 V.
Positive Differential Input.
Negative Differential Input.
Positive BTL Output.
Analog Positive Supply. Range: 2.5 V - 5.5 V.
Analog Ground.
Negative BTL Output.
Common Signal Line for Switch #1.
Control Input for Switch #1.
Normally Closed Signal Line for Switch #1.
Analog Ground.
Description
6
7
8
9
10
11
12
13
14
15
16
V
p
INP
INM
OUTP
V
p
GND
OUTM
COM1
IN1
NC1
GND
I
I
I
O
I
I
O
I/O
I
I/O
I
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3
NLMD5820
MAXIMUM RATINGS
Symbol
V
p
V
in
V
CC
V
IS
V
IN
I
out
I
anl1
I
anl-pk1
I
clmp
P
d
T
J
T
stg
R
qJA
-
-
-
MSL
Supply Voltage for Amplifier
Input Voltage for Amplifier
Supply Voltage for Switches
Analog Signal Voltage for Switches (V
NC
, or V
COM
)
Control Input for Switches
Max Output Current of Amplifier (Note 1)
Continuous DC Current from COM to NC
Peak Current from COM to NC, 10 Duty Cycle
Continuous DC Current into COM/NC with Respect to V
CC
or GND
Power Dissipation (Note 2)
Max Junction Temperature
Storage Temperature Range
Thermal Resistance Junction-to-Air
ESD Protection
Human Body Model (HBM) (Note 3)
Machine Model (MM) (Note 4)
Latchup Current @ T
A
= 85°C (Note 5)
Moisture Sensitivity (Note 6)
UDFN16
UDFN16
Rating
Active Mode
Shutdown Mode
Max
6.0
7.0
-0.3 to V
CC
+0.3
-0.5 to +5.5
-0.5
v
V
IS
v
V
CC
+ 0.5
-0.5
v
V
IN
v
+5.5
1.5
±300
±500
±100
Internally Limited
150
-65 to +150
50
> 2000
> 200
±100
Level 1
Unit
V
V
V
V
V
A
mA
mA
mA
-
°C
°C
°C/W
V
mA
Stresses exceeding Maximum Ratings may damage the device. Maximum Ratings are stress ratings only. Functional operation above the
Recommended Operating Conditions is not implied. Extended exposure to stresses above the Recommended Operating Conditions may affect
device reliability.
1. The device is protected by a current breaker structure. See “Current Breaker Circuit” in the Description Information section for more
information.
2. The thermal shutdown is set to 160°C (typical) avoiding irreversible damage to the device due to power dissipation.
3. Human Body Model: 100 pF discharged through a 1.5 kW resistor following specification JESD22/A114.
4. Machine Model: 200 pF discharged through all pins following specification JESD22/A115.
5. Latchup Testing per JEDEC Standard JESD78.
6. Moisture Sensitivity Level (MSL): 1 per IPC/JEDEC standard: J-STD-020A.
RECOMMENDED OPERATING CONDITIONS
Symbol
V
P
V
CC
V
IS
V
IN
T
A
Supply Voltage for Amplifier
Supply Voltage for Switches
Analog Signal Voltage for Switches
Control Input for Switches
Operating Ambient Temperature
Parameter
Range
2.5 to 5.5
1.65 to 4.5
GND to V
CC
GND to V
CC
-40 to +85
Unit
V
V
V
V
°C
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4
NLMD5820
ELECTRICAL CHARACTERISTICS OF AMPLIFIER
(Limits apply for T
A
= +25°C unless otherwise noted)
Characteristic
Supply Quiescent Current
Symbol
I
dd
Conditions
V
p
= 3.6 V, R
L
= 8.0
W
V
p
= 5.5 V, No Load
V
p
from 2.5 V to 5.5 V, No Load
T
A
= -40°C to +85°C
V
p
= 4.2 V
T
A
= +25°C
T
A
= +85°C
V
p
= 5.5 V
T
A
= +25°C
T
A
= +85°C
Shutdown Voltage High
Shutdown Voltage Low
Switching Frequency
Gain
Output Impedance in Shutdown Mode
Resistance from SD to GND
Output Offset Voltage
Turn On Time
Turn Off Time
Thermal Shutdown Temperature
Output Noise Voltage
V
sdih
V
sdil
F
sw
G
Z
SD
Rs
Vos
Ton
Toff
Tsd
Vn
-
-
V
p
from 2.5 V to 5.5 V
T
A
= -40°C to +85°C
R
L
= 8.0
W
-
-
V
p
= 5.5 V
V
p
from 2.5 V to 5.5 V
V
p
from 2.5 V to 5.5 V
-
V
p
= 3.6 V, f = 20 Hz to 20 kHz
no weighting filter
with A weighting filter
R
L
= 8.0
W,
f = 1.0 kHz, THD+N < 1%
V
p
= 2.5 V
V
p
= 3.0 V
V
p
= 3.6 V
V
p
= 4.2 V
V
p
= 5.0 V
R
L
= 8.0
W,
f = 1.0 kHz, THD+N < 10%
V
p
= 2.5 V
V
p
= 3.0 V
V
p
= 3.6 V
V
p
= 4.2 V
V
p
= 5.0 V
R
L
= 4.0
W,
f = 1.0 kHz, THD+N < 1%
V
p
= 2.5 V
V
p
= 3.0 V
V
p
= 3.6 V
V
p
= 4.2 V
V
p
= 5.0 V
R
L
= 4.0
W,
f = 1.0 kHz, THD+N < 10%
V
p
= 2.5 V
V
p
= 3.0 V
V
p
= 3.6 V
V
p
= 4.2 V
V
p
= 5.0 V
Efficiency
-
R
L
= 8.0
W,
f = 1.0 kHz
V
p
= 5.0 V, P
out
= 1.2 W
V
p
= 3.6 V, P
out
= 0.6 W
R
L
= 4.0
W,
f = 1.0 kHz
V
p
= 5.0 V, P
out
= 2.0 W
V
p
= 3.6 V, P
out
= 1.0 W
Min
-
-
-
-
-
-
-
1.2
-
180
285 kW
R
i
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
Typ
2.15
2.61
-
0.42
0.45
0.8
0.9
-
-
240
300 kW
R
i
20
300
6.0
1.0
1.0
160
65
42
0.22
0.33
0.45
0.67
0.92
0.36
0.53
0.76
1.07
1.49
0.24
0.38
0.57
0.83
1.2
0.52
0.8
1.125
1.58
2.19
87
87
79
78
Max
-
-
3.8
mA
0.8
2.0
mA
1.5
-
-
0.4
300
315 kW
R
i
-
-
-
-
-
-
-
-
W
-
-
-
-
-
W
-
-
-
-
-
W
-
-
-
-
-
W
-
-
-
-
-
%
-
-
-
-
V
V
kHz
V
V
kW
kW
mV
ms
ms
°C
mVrms
Unit
mA
Shutdown Current
I
sd
RMS Output Power
Po
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5
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