NJU8714 Datasheet, PDF (1/7 Pages) New Japan Radio – STEREO BTL OUTPUTS SWITCHING DRIVER FOR Class D AMPLIFIER

NJU38575154
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
“SEL” terminal which selects “Synchronous” or
“Asynchronous”. “Asynchronous” 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@8Ω
BEEP Function
Standby Function
Output Driver Control Function
Operating Voltage
CMOS Technology
V_DD: 1.7V to 2.7V
V_DDO: 0V to 2.0V
V_G: 4.5V to 5.25V
Package Outline :SSOP20-B2
PIN CONFIGURATION
MCK
1
20
V_SS
2
19
HALTB
3
18
D_IN1
4
17
BEEP_IN
5
16
O_BEEP1
6
15
OUT₁
7
14
V_SSO
8
13
OUT_1X
9
12
V_DDO1
10
11
BLOCK DIAGRAM
V_DD V_SS
V_G
D_IN1
Level
Shifter
Control
Logic
Pre
Driver
D_IN2
MCK
STBYB
HALTB
SEL
BEEP_IN
Level
Shifter
Level
Shifter
Level
Shifter
Level
Shifter
Level
Shifter
Control
Logic
Pre
Driver
V_DD
SEL
STBYB
D_IN2
V_G
O_BEEP2
OUT₂
V_SSO
OUT_2X
V_DDO2
V_DDO1
OUT1
OUT1X
V_SSO
V_DDO2
OUT2
OUT2X
V_SSO
O_BEEP1
O_BEEP2
Ver.2004-05-21
-1-