ESMT
Preliminary
AD52651A
2.5W/CH Stereo Filter-less Class-D Audio Amplifier with
Headphone Driver
Features
Supply voltage range: 2.5 V to 5.5 V
Support single-ended or differential analog input
Low static operation current
Low shut-down current
Short power-on transient time
Two volume control modes
DC volume control from -38dB to +20dB
4-step volume gain of +6, +12, +18, +24dB
Independent power-down control for left or right
channel
Overload and thermal protection
Loudspeaker power within 10% THD+N
1.5W/ch into 8Ω loudspeaker
2.5W/ch into 4Ω loudspeaker
Loudspeaker efficiency
89% @ 8Ω, P
o,10% THD+N
84% @ 4Ω, P
o,10% THD+N
Headphone power within 1% THD+N
120mW/ch into 16Ω headphone
Description
The AD52651A is a stereo, filter-less class-D
audio amplifier with headphone driver. Operating
with 5.0V loudspeaker driver supply, it can deliver
2.5W/CH output power into 4
Ω
loudspeaker within
10% THD+N and 120mW/CH output power into 16Ω
headphone within 1% THD+N.
The AD52651A has two volume control modes by
setting MODE pin. While MODE pin is set logic high,
AD52651A is in DC volume control mode with
31-step volume gain from -38 dB to +20dB, adjusted
by the DC voltage applied on G0 pin. Otherwise,
AD52651A is the 4-step volume gain mode with
+6dB, +12dB, +18dB, and +24dB gain, selected by
setting G0 and G1 pins. The two volume adjustment
modes are designed to fit the different volume
control requirements in various applications. Beside
stereo class-D amplifier, AD52651 has built-in an
inverted stereo class-AB headphone driver. With the
independent power-down control for left or right
channel, the AD52651 is more convenient to control
the left and right channels.
The AD52651A packaged as E-TSSOP 24L is a
stereo audio amplifier with high efficiency, which
leads to longer battery left, less heat sink
requirement, smaller board size and lower system
cost, and suitable for the notebook computer, and
portable multimedia devices.
Applications
Monitor audio
PDA
Portable multimedia devices
Notebook computer
Mobile phone
Functional Block Diagram
Elite Semiconductor Memory Technology Inc.
Publication Date: Sep. 2007
Revision: 0.1
1/20
ESMT
Pin Assignments
Preliminary
AD52651A
Pin Description
NAME
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
INL-
INL+
HP_SPK
G1
HPL
OUTL+
PVDDL
PGNDL
OUTL-
AGND
MODE
SDL#
SDR#
AVDD
N.C.
OUTR-
PGNDR
PVDDR
OUTR+
HPR
G0
VREF
INR+
INR-
TYP
I
I
I
I
O
O
P
G
O
G
I
I
I
P
x
O
G
P
O
O
I
O
I
I
G
DESCRIPTION
Left channel Input (-)
Left channel Input (+)
0: SPK mode; 1: HP mode
Gain selection
Left channel headphone driver
Left channel output (+)
High current power supply
High current ground
Left channel output (-)
Ground
4-gain/DC Vol. control
Shut-down left channel
Shut-down right channel
Power supply
N.C.
Right channel output (-)
High current ground
High current power supply
Right channel output (+)
Right channel headphone driver
Gain selection/DC vol. level
Reference voltage
Right channel Input (+)
Right channel Input (-)
Must be soldered to PCB’s ground plane
Publication Date: Sep. 2007
Revision: 0.1
2/20
with 300 kΩ pull-low resistor
with 300 kΩ pull-low resistor
with 300 kΩ pull-low resistor
with 300 kΩ pull-high resistor
with 300 kΩ pull-low resistor
CHARACTERISTIC
Thermal Pad
Elite Semiconductor Memory Technology Inc.
ESMT
Available Package
Package Type
E-TSSOP 24L
Device no.
AD52651A
Preliminary
AD52651A
θ
JA
(
o
C/W)
43.8
Exposed Thermal Pad
Yes
(Note1)
Note1: The thermal pad is at the bottom of package. To optimize the performance of thermal
dissipation, solder the thermal pad to PCB’s ground plane is suggested.
Absolute Maximum Ratings
SYMBOL
AVDD
PVDDL(R)
T
stg
T
a
PARAMETER
Power supply for lower power analog cells
Power supply for loudspeaker driver
Input voltage
Storage temperature
Ambient operating temperature
MIN
2.5
2.5
-0.3
-65
0
MAX
5.5
5.5
AVDD
150
70
UNIT
V
V
V
o
o
C
C
Recommended Operating Conditions
SYMBOL
AVDD
PVDDL(R)
V
IH
V
IL
T
a
PARAMETER
Power supply for lower power analog cells
Power supply for Driver Stage
High-Level Input Voltage
Low-Level Input Voltage
Ambient Operating Temperature
TYP
2.5~5.0
2.5~5.0
2.0
0.8
0~70
UNIT
V
V
V
V
o
C
General Electrical Characteristics
SYMBOL
I
PD_SKP
PARAMETER
Supply current during
power-down mode
@ Speaker mode
Supply current during
power-down mode
@ Headphone mode
Output offset voltage
@ Speaker mode
Junction temperature for
driver shutdown
Temperature hysteresis for
recovery from shutdown
f
sw
R
SC
Switching rate of
loudspeakers driver
Loudspeaker short-circuit
PVDDR(L) = 5 V
detect resistance
CONDITION
AVDD=PVDDR(L)=5.0V;
HP_SPK=0V;
SDL#=SDR#=0V
AVDD=PVDDR(L)=5.0V;
HP_SPK=5V;
SDL#=SDR#=0V
Input ac grounded,
VDD=2.5V~5.0V
145
115
300
MIN
TYP
20
MAX
50
UNIT
μA
I
PD_HP
1
10
μA
V
offset
5
150
120
25
155
125
mV
o
C
C
o
450
2.8
600
3.2
kHz
Ω
Elite Semiconductor Memory Technology Inc.
Publication Date: Sep. 2007
Revision: 0.1
3/20
DSP 与 ARM 处理器
京公网安备 11010802033920号
Copyright © 2005-2026 EEWORLD.com.cn, Inc. All rights reserved
电子工程世界
