NCP2815
NOCAPt LongPlay
Headphone Amplifier
NCP2815 is a dual LongPlay true ground headphone amplifier
designed for portable communication device applications such as
mobile phones. This part is capable of delivering 26 mW of
continuous average power into a 32
W
load from a 1.8 V power supply
with a THD+N of 1%.
Based on the power supply delivered to the device, an internal
power management block generates a symmetrical positive and
negative voltage. Thus, the internal amplifiers provide outputs
referenced to Ground and the losses are reduced which helps to
increase the battery life. In this NOCAP configuration, the two
external heavy coupling capacitors can be removed. This provides a
significant space and cost savings compared to a typical stereo
application.
NCP2815 is available with an external adjustable gain (version A),
or internal gain of
−1.5
V/V (version B). It reaches a superior
−100
dB
PSRR and noise floor. Thus, it offers high fidelity audio sound, as well
as a direct connection to the battery. It contains circuitry to prevent
“Pop & Click” noise that would otherwise occur during turn−on and
turn−off transitions. The device is available in 12 bump CSP package
(1.2 x 1.6 mm) which helps to save space on the board.
Features
♦
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MARKING
DIAGRAM
12 PIN CSP
FC SUFFIX
CASE 499BJ
x
815xz
AYWW
G
= A for NCP2815A
= B for NCP2815B
z
= C for Backside laminate
A
= Assembly Location
Y
= Year
WW = Work Week
G
= Pb−Free Package
Pin Configuration
A1
CPM
B1
PGND
C1
CPP
A2
PVM
B2
/SD
C2
VP
A3
INL
B3
HiZ
C3
OUTL
A4
INR
B4
SGND
C4
OUTR
•
NOCAP Output Eliminates DC−Blocking Capacitors:
•
•
•
•
•
•
•
•
•
•
Saves Board Area
♦
Saves Component Cost
♦
No Low−Frequency Response Attenuation
LongPlay Architecture: Increase the Battery Life
High PSRR (−100 dB): Direct Connection to the Battery
“Pop and Click” Noise Protection Circuitry
Internal Gain (−1.5 V/V) or External Adjustable Gain
Ultra Low Current Shutdown Mode
High Impedance Mode
1.6 V – 3.6 V Operation
Thermal Overload Protection Circuitry
CSP 1.2 x 1.6 mm
These Devices are Pb−Free, Halogen Free/BFR Free and are RoHS
Compliant
(Top View)
ORDERING INFORMATION
See detailed ordering and shipping information on page 10 of
this data sheet.
Typical Applications
♦
♦
♦
♦
•
Headset Audio Amplifier for
Cellular Phones
MP3 player
Personal Digital Assistant and Portable Media Player
Portable Devices
©
Semiconductor Components Industries, LLC, 2012
January, 2012
−
Rev. 1
1
Publication Order Number:
NCP2815/D
NCP2815
Figure 1. Typical Application Circuit
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2
NCP2815
VP
1
mF
1
mF
VP
VRP
POWER MANAGEMENT
VRM
CPP
CPM
PVM
PGND
1
mF
VRP
Left
Audio
INL
−
OUTL
+
VRM
SD BIASING
HiZ
CLICK / POP
SUPPRESSION
VRP
+
OUTR
Right
Audio
INR
−
VRM
SGND
Figure 2. Typical Application Schematic Version A
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NCP2815
VP
1
mF
1
mF
VP
VRP
POWER MANAGEMENT
VRM
CPP
CPM
PVM
PGND
1
mF
VRP
Left
Audio
INL
−
OUTL
+
VRM
SD BIASING
HiZ
CLICK / POP
SUPPRESSION
VRP
+
OUTR
Right
Audio
INR
−
VRM
SGND
Figure 3. Typical Application Schematic Version B
PIN FUNCTION DESCRIPTION
Pin
A1
A2
A3
A4
B1
B2
B4
C1
C2
C3
C4
B3
Pin
Name
CPM
PVM
INL
INR
PGND
/SD
SGND
CPP
VP
OUTL
OUTR
HiZ
Type
Input /
Output
Output
Input
Input
Ground
Input
Ground
Input /
Output
Power
Output
Output
Input
Description
Charge pump flying capacitor negative terminal. A 1
mF
ceramic filtering capacitor to CPP is re-
quired
Charge pump output. A 1
mF
ceramic filtering capacitor to ground is required
Left input of the audio source
Right input of the audio source
Power ground
Enable activation.
Sense Ground. Connect to shield terminal of headphone jack or ground plane.
Charge pump flying capacitor positive terminal. A 1
mF
ceramic filtering capacitor to CPM is re-
quired.
Positive supply voltage, connected to a Lithium/Ion battery or other power supply.
Left audio channel output signal
Right audio channel output signal
Output high impedance mode activation.
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NCP2815
MAXIMUM RATINGS
Rating
V
P
Pin: Power Supply Voltage (Note 1)
INL, INR, /SD pins
HiZ, OUTL, OUTR pins
Human Body Model (HBM) ESD Rating are (Note 2)
Machine Model (MM) ESD Rating are (Note 2)
CSP 1.2 x 1.6 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
mr1
V
mr2
ESD HBM
ESD MM
R
qJC
T
A
T
J
T
JMAX
T
STG
MSL
Value
−0.3
to + 4.5
−0.3
to V
P
+ 0.3
−0.3
– V
P
to V
P
+ 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 on the PCB heat dissipation. The maximum power dissipation (PD) is dependent on the min input voltage, the max
output current and the selected external components.
R
qCA
+
125
*
T
A
P
D
*
R
qJC
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