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NJU8714 Datasheet

  • NJU8714

  • STEREO BTL OUTPUTS SWITCHING DRIVER FOR Class D AMPLIFIER

  • 111.30KB

  • 7頁(yè)

  • NJRC

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NJU8714
NJU3555
STEREO BTL OUTPUTS SWITCHING DRIVER
FOR Class D AMPLIFIER
GENERAL DESCRIPTION
The
NJU8714
is a stereo BTL outputs switching driver
for class D amplifier. It receives PWM/PDM signals from
DSP outputs, and drives headphones or speakers by BTL
outputs.
Output drivers are composed of Series-Connected
N-channel FETs, and output voltage levels can be
controlled by variable power supply with keeping all of
input signal information.
The NJU8714 incorporates BTL outputs amplifiers,
which eliminate AC coupling capacitors. Also, it provides
鈥淪EL鈥?terminal which selects 鈥淪ynchronous鈥?or
鈥淎synchronous鈥? 鈥淎synchronous鈥?can be reduced the
operating current. Therefore, it is suitable for portable
audio set and others.
PACKAGE OUTLINE
NJU8714VB2
FEATURES
2-channel 1bit Audio Signal Input
Stereo BTL Outputs
Output Power
: Typ.150mW@8鈩?/div>
BEEP Function
Standby Function
Output Driver Control Function
Operating Voltage
V
DD
: 1.7V to 2.7V
V
DDO
: 0V to 2.0V
V
G
: 4.5V to 5.25V
CMOS Technology
Package Outline :SSOP20-B2
PIN CONFIGURATION
MCK
V
SS
HALTB
D
IN1
BEEP
IN
O
BEEP1
OUT
1
V
SSO
OUT
1X
V
DDO1
1
2
3
4
5
6
7
8
9
10
20
19
18
17
16
15
14
13
12
11
V
DD
SEL
STBYB
D
IN2
V
G
O
BEEP2
OUT
2
V
SSO
OUT
2X
V
DDO2
BLOCK DIAGRAM
V
DD
V
SS
V
G
V
DDO1
D
IN1
Level
Shifter
OUT
1
Control
Logic
Pre
Driver
OUT
1X
V
SSO
V
DDO2
D
IN2
MCK
STBYB
HALTB
SEL
BEEP
IN
O
BEEP2
Level
Shifter
Level
Shifter
Level
Shifter
Level
Shifter
Level
Shifter
OUT
2
Control
Logic
Pre
Driver
OUT
2X
V
SSO
O
BEEP1
Ver.2004-05-21
-1-

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