NCP2704
Audio Management
Integrated Circuit with
2.8 W Class D and LongPlay
True Ground Headphone
Amplifier
The NCP2704 is a cost effective audio subsystem designed for
portable applications such as cellular phones and portable media
player. It has been designed to cover the power audio requirements in
portable equipment: including a high fidelity Class D speaker
amplifier and a Class G equivalent LongPlay true ground headphone
amplifier. This patented headphone amplifier circuitry allows the
removal of the bulky output capacitors and minimize audio playback
current consumption with minimum external components. In addition
the user can set the output swing to have enough output dynamic even
when a damping resistor is added.
Through a flexible I
2
C interface, NCP2704 can support both single
ended and differential types of analog input signal. In both cases, it
offers a zero pop noise signature. The same interface allows a user
defined architecture with an input control, highly accurate gain setting
capability from
−60
dB to +12 dB and output control. In addition
NCP2704 offers the possibility to reduce the EMI perturbation by
lowering the rise and fall times of the Class D outputs (software
programmable). The Loudspeaker also amplifier includes an AGC
which performs two functions: limiter and non−clipping.
Features
♦
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MARKING
DIAGRAM
A1
20 PIN CSP
FC SUFFIX
CASE 499BH
NCP2704
AYWW
G
NCP2704 = Specific Device Code
A
= Assembly Location
Y
= Year
WW
= Work Week
G
= Pb−Free Package
PINOUT
A1
IN2B
B1
A2
IN1B
B2
A3
HSR
B3
A4
HSL
B4
A5
PVM
B5
•
Flexible MUX Capability and Volume Control
•
•
•
•
•
•
•
•
•
Separated Mixer Control Between Louspeaker and Headset
C1N
GND
I2CEN
IN2A
IN1A
♦
Support Either Differential or Single−ended Input
C1
C2
C3
C4
C5
High Sound Quality
SCL
NC
GND
SDA
GND
♦
−100
dB PSRR on Headphone Amplifier
D1
D2
D3
D4
D5
♦
−80
dB PSRR on Loudspeaker Amplifier
LPN
PVDD
LPP HSVDD C1P
♦
0.02% THD+N at 1 kHz on Headset Amplifier
♦
0.1% THD+N at 1 kHz on Loudspeaker Amplifier
Low EMI Filterless Class D Loudspeaker Amplifier, Programmable
High Efficiency or Low EMI Mode
Programmable AGC: Non−Clipping or Power Limit (Loudspeaker
ORDERING INFORMATION
See detailed ordering and shipping information in the package
Output)
dimensions section on page 27 of
Long Play True Ground Headphone Amplifier,
•
20−Bump Chip Scale Package (2.5
this data sheet.
x 2.0 mm)
Programmable Output Swing (Up to 5 V
pp
)
•
This is a Pb−Free Device
2
C Control
I
Typical Applications
Software Shutdown
•
Cellular Phones
No Pop and Click Noise
•
Portable Media Player
TDMA Noise Free
Thermal and Short−Circuit Protection
©
Semiconductor Components Industries, LLC, 2010
November, 2010
−
Rev. 0
1
Publication Order Number:
NCP2704/D
NCP2704
PVDD
GND
IN2A
IN2B
INPUT1
PROCESSING
0 dB to 20 dB
Loudspeaker
Volume
−
60 dB to12 dB
+
CLASS D
LOUDSPEAKER
AMPLIFIER with AGC
+12 dB
LPP
LPN
8
IN1A
IN1B
INPUT2 PRO-
CESSING
0 dB to 20 dB
MIXER / MUX
Headset Left
Volume
−
60 dB to12dB
+
HSL
HSR
Headset Right
Volume
−
60 dB to12dB
+
I2CEN
POWER SUPPLY CONVERSION
I 2C
INTERFACE
VRP
VRM
PVM
SCL
SDA
GND
HSVDD
GND
C1N
C1P
Figure 1. Simplified Block Diagram
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NCP2704
PIN FUNCTION DESCRIPTION
Pin
B2
A2
B1
A1
C3
C4
B3
D4
C5
C2
A3
A4
D1
D3
D2
B4
D5
B5
A5
C1
Pin Name
IN1A
IN1B
IN2A
IN2B
SCL
SDA
GND
HSV
DD
GND
GND
HSR
HSL
LPN
LPP
PV
DD
I2CEN
C1P
C1N
PVM
NC
Type
Input
Input
Input
Input
Input
Input /
Output
Power
Power
Power
Power
Output
Output
Output
Output
Power
Input
Output
Output
Output
−
Description
First audio input. It is paired with IN1B. This pin is configured for single ended or differential
types of input, pending on the I
2
C programming.
First audio input. It is paired with IN1A. This pin is configured for single ended or differential
types of input, pending on the I
2
C programming.
Second audio input. It is paired with IN2B. This pin is configured for single ended or differential
types of input, pending on the I
2
C programming.
Second audio input. It is paired with IN2A. This pin is configured for single ended or differential
types of input, pending on the I
2
C programming.
Clock input for the I
2
C bus.
Data input for the I
2
C bus.
Analog ground.
Power supply dedicated to the charge pump and the headset amplifier. A low ESR ceramic
capacitor to ground is required.
Power ground dedicated to the charge pump and the headset amplifier.
Power ground dedicated to the loudspeaker and the receiver.
Headset amplifier right output.
Headset amplifier left output.
Loudspeaker negative output.
Loudspeaker positive output.
Power supply. A low ESR ceramic capacitor to ground is required.
I
2
C enable pin
Charge pump flying capacitor positive capacitor.
Charge pump flying capacitor negative capacitor.
Charge pump output. This is the symmetrical voltage of the power supply applied on the
HSV
BAT.
A low ESR ceramic capacitor to ground is required.
Not connected pin
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3
NCP2704
MAXIMUM RATINGS
Rating
PV
DD
: Power Supply Voltage (Note 1)
HSV
DD
(Note 1)
Other Pins (Note 1)
Human Body Model (HBM) ESD Rating are (Note 2)
Machine Model (MM) ESD Rating are (Note 2)
CSP 2.5 x 2 mm package (Notes 6 and 7)
Thermal Resistance Junction−to−Case
Operating Ambient Temperature Range
Operating Junction Temperature Range
Maximum Junction Temperature (Note 6)
Storage Temperature Range
Moisture Sensitivity (Note 5)
Symbol
V
IN
V
IN
V
YY
ESD HBM
ESD MM
R
qJC
T
A
T
J
T
JMAX
T
STG
MSL
Value
−0.3
to + 6.0
−0.3
to + 4.5
−0.3
to P
VDD
+ 0.3
2000
200
Note 7
−40
to +85
−40
to +125
+150
−65
to +150
Level 1
Unit
V
V
V
V
V
°C/W
°C
°C
°C
°C
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. Maximum electrical ratings are defined as those values beyond which damage to the device may occur at T
A
= 25°C.
2. According to JEDEC standard JESD22−A108B.
3. This device series contains ESD protection and passes the following tests:
Human Body Model (HBM)
$2.0
kV per JEDEC standard: JESD22−A114 for all pins.
Machine Model (MM)
$200
V per JEDEC standard: JESD22−A115 for all pins.
4. Latch up Current Maximum Rating:
$100
mA per JEDEC standard: JESD78 Class II.
5. Moisture Sensitivity Level (MSL): 1 per IPC/JEDEC standard: J−STD−020A.
6. The thermal shutdown set to 160°C (typical) avoids irreversible damage on the device due to power dissipation.
7. The R
qCA
is dependent of the PCB heat dissipation. The maximum power dissipation (PD) is dependent by the min input voltage, the max
output current and external components selected.
R
qCA
+
125
*
T
A
P
D
*
R
qJC
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NCP2704
ELECTRICAL CHARACTERISTICS
Min and Max Limits apply for T
A
between
−40°C
to +85°C and T
J
up to + 125°C for PV
DD
between 2.5 V to 5.5 V (Unless otherwise noted). Typical values are referenced to T
A
= + 25°C and PV
DD
= 3.6 V, HSV
DD
= 1.8 V.
Symbol
GENERAL
PV
DD
HSV
DD
I
SD
Supply voltage range
Supply voltage range
Shutdown current
Soft shutdown
PV
DD
HSV
DD
Headset mode at Ta = 25°C,
PV
DD
= 3.6 V, HSV
DD
= 1.8 V
PV
DD
HSV
DD
Speaker mode at Ta = 25°C,
PV
DD
= 3.6 V, HSV
DD
= 1.8 V
PV
DD
HSV
DD
Headset + Speaker mode at Ta =
25°C, PV
DD
= 3.6 V, HSV
DD
= 1.8 V
PV
DD
HSV
DD
18
F = 1 kHz, differential input mode
2.5
1.6
5.5
3.6
1
V
V
mA
Parameter
Conditions
Min
Typ
Max
Unit
0.1
I
Q
Quiescent current
mA
0.1
2
2.2
1.8
2.2
2.8
20
−80
160
20
2.2
150
1.4
100
0.25
2.5
2.8
2.1
2.8
3.3
24
kW
dB
°C
°C
V
mV
V
mV
R
IN
CMRR
T
SD
T
SD_hyst
UVLO1
UVLO1
hys
UVLO2
UVLO2
hys
Input resistance
Common mode rejection ratio
Thermal shutdown temperature
Thermal shutdown temperature
hysteresis
Undervoltage lockout on PV
DD
UVLO hysteresis on PV
DD
Undervoltage lockout on HSV
DD
UVLO hysteresis on HSV
DD
Digital volume range Loudspeaker
Digital volume range Headset
Preamp gain
Minimum gain
Maximum gain
Minimum gain
Maximum gain
Input 1 or 2
INxG = 00
INxG = 01
INxG = 10
INxG = 11
INxG = 11 and gain control =
110100
INxG = 11 and gain control = 100111
(speaker amplifier has a gain of
+12 dB)
VOLUME CONTROL
−60
12
−60
12
0
+6
+12
+20
+32
+44
dB
dB
dB
Maximum gain setting Headset
Maximum gain setting Speaker
dB
dB
8. Guaranteed by design and characterized.
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