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NJU8789 の電気的特性と機能

NJU8789のメーカーはNew Japan Radioです、この部品の機能は「Monaural BTL Output Clock-less Switching Driver」です。


製品の詳細 ( Datasheet PDF )

部品番号 NJU8789
部品説明 Monaural BTL Output Clock-less Switching Driver
メーカ New Japan Radio
ロゴ New Japan Radio ロゴ 




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NJU8789 Datasheet, NJU8789 PDF,ピン配置, 機能
NJU8789
Monaural BTL Output Clock-less Switching Driver for Class D Amplifier
GENERAL DESCRIPTION
The NJU8789 is a monaural BTL output switching driver
for class D amplifier including Separated Power Source
terminals between Input and Output. It converts 1bit
digital signal input, such as PWM or PDM signal.
The NJU8789 realizes very high power-efficiency by
class D operation. Therefore, It is suitable for portable
set with speaker.
PACKAGE OUTLINE
NJU8789V
FEATURES
Clock-less switching driver
1-channel 1bit Audio Signal Input
Monaural BTL Output
Standby(Hi-Z) Control Function
Operating Voltage : 1.8V to 4.5V
Driving Voltage
: VDD to 4.5V
CMOS Technology
Package Outline
: SSOP10
PIN CONFIGURATION
VDD
IN
NC
TEST
STBYb
1
2
3
4
5
10 VSS
9 OUTP
8 VDDO
7 OUTN
6 VSS
BLOCK DIAGRAM
VDD
VDDO
IN
STBYb
LEVEL
SHIFTER
LEVEL
SHIFTER
VSS
OUTN
OUTP
NJU8789
Ver.2009-01-21
-1-

1 Page





NJU8789 pdf, ピン配列
NJU38575859
FUNCTIONAL DESCRIPTION
(1) IN terminal (Input Signal)
The input signals are PWM signals or PDM signals.
(2) OUTP and OUTN terminal (Output Signal)
The OUTP and OUTN generate PMW output signal The NJU8789 drives a speaker by the BTL output, and
OUTP is a positive output and OUTN is a negative outputs.
A switching regulator with a high response against a voltage fluctuation is the best selection for the VDDO,
which is the power supply for output drivers.
(3) Standby Control Function
By setting the STBYb terminal to “L”, the NJU8789 becomes standby condition. During standby condition,
OUTP and OUTN are in Hi-Z.
The STBYb terminal must be connected to VDD when not using the Standby Function.
Ver.2009-01-21
-3-


3Pages


NJU8789 電子部品, 半導体
NJU8789
APPLICATION CIRCUIT
Signal
Control
IN(2)
OUTN(7)
STBYb(5)
OUTP(9)
TEST(4)
LO
220µH
8
Speaker
10µF
Logic Power
0.1µF
+
VDD(1)
VSS(6or10)
VDDO(8)
1µF 10µF
Output Power
+
Note 4) De-coupling capacitors must be connected between each power supply terminal and GND terminal.
Note 5) The power supply for VDDO requires fast driving response performance such as a switching regulator
for T.H.D.
Note 6) The above circuit shows only application example and does not guarantee the any electrical
characteristics. Therefore, please consider and check the circuit carefully to fit your application.
Note 7) VDD and VDDO must be applied with conbecting to VSS in STBYb must be connected to VSS.
Note 8) STBYb must be connected to VSS when applying voltage to VDD and VDDO.
Note 9) It is necessary to connect the Coil(Lo) to OUTN or OUTP terminal and Speaker for low power
consumption of the NJU8789.
Note 10)(1) to (10) indicates pin numbers.
.
-- 66 --
[CAUTION]
The specifications on this databook are only
given for information , without any guarantee
as regards either mistakes or omissions. The
application circuits in this databook are
described only to show representative usages
of the product and not intended for the
guarantee or permission of any right including
the industrial rights.
Ver.2009-01-21

6 Page



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部品番号部品説明メーカ
NJU8789

Monaural BTL Output Clock-less Switching Driver

New Japan Radio
New Japan Radio


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