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PDF NJU8753 Data sheet ( Hoja de datos )
| Número de pieza | NJU8753 | |
| Descripción | Analog | |
| Fabricantes | JRC | |
| Logotipo |  |
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Hay una vista previa y un enlace de descarga de NJU8753 (archivo pdf) en la parte inferior de esta página. Total 7 Páginas | ||
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NJU8753
www.DataSheet4U.com
PRELIMINARY
Analog Signal Input Class D Amplifier
with DC-DC Converter for Piezo Speaker
GENERAL DESCRIPTION
The NJU8753 is an analog signal input class D power
amplifier with DC-DC converter for Piezo speaker. Input
part operates on 2.85V(typ) and a built-in DC-DC
converter generates variable output voltage(up to 12V)
with input voltage(2.6 to 4.2V). Therefore, it drives
Piezo speaker with louder sound and high efficiency.
The NJU8753 incorporates BTL amplifier, which
eliminate AC coupling capacitors, capable of driving
monaural Piezo speaker with simple external LC
low-pass filters.
Class D operation achieves lower power operation for
Piezo speaker, thus the NJU8753 is suited for battery-
powered applications.
PACKAGE OUTLINE
NJU8753KN1
FEATURES
Piezo Speaker Driving
Output voltage: 8Vrms(Typ.) @VDDO=10.0V
1-channel Analog Signal Input, 1-channel BTL output
Standby(Hi-Z),
Built-in DC-DC Converter
Built-in Low Voltage Detector
Built-in Short Protector
Operating Voltage
CMOS Technology
:2.6~3.6V(VDD, VREG)
:2.6~4.2V(VBAT)
Package Outline
:QFN28
PIN CONFIGURATION
28
1
TEST1
TEST3
VREG
FB
VSS
VSS1
VSS1
VDDO
OUTP
VSS
NC
VSS
OUTN
VDDO
QFN28
Ver.2003-09-26
-1-
1 page  
www.DataSheet4U.com
NJU3857553
ABSOLUTE MAXIMUM RATINGS
PARAMETER
Supply Voltage
LX Input Voltage
FB Input Voltage
Input Voltage
Operating Temperature
Storage Temperature
Power Dissipation
(Ta=25°C)
SYMBOL
RATING
UNIT
VDD
-0.3 ~ +4.0
V
VREG
-0.3 ~ +4.0
V
VDDO
-0.3 ~ +15.0
V
VLX
-0.3 ~ +15.0
V
VFB
-0.3 ~ +4.0
V
Vin
-0.3 ~ VDD+0.3
V
Topr
-40 ~ +85
°C
Tstg
-40 ~ +125
°C
PD
640*
mW
* : Mounted on a glass epoxy PCB(50mm x 50mm x 1.6mm).
Note 1) All voltage are relative to “VSS= 0V” reference.
Note 2) The LSI must be used inside of the “Absolute maximum ratings”. Otherwise, a stress may cause
permanent damage to the LSI.
Note 3) De-coupling capacitors for VDD(Pin 28)-VSS(Pin 27), VREG(Pin 3)-VSS(Pin 5) and LX(Pin 8,9)-VSS(Pin
17,18,19) should be connected for stable operation.
ELECTRICAL CHARACTERISTIC
(Ta=25°C, VDD=VREG=2.85V, VBAT=3.7V, VDDO=10V, VSS=0V, VSS1=0V,
TEST1=TEST2=TEST3=0V, EN1=EN2=2.85V,
Input Signal=1kHz, Input Signal Level=150mVrms, Frequency Band=20Hz~20kHz,
Load Impedance=2.0µF 2nd-order 11.5kHz LC Filter(Q=0.72))
PARAMETER
SYMBOL
CONDITIONS
MIN TYP MAX UNIT Note
VDD Supply Voltage
VREG Supply Voltage
VBAT Input Voltage
VDDO Supply Voltage
Input Impedance
Voltage Gain
Output THD
Maximum Output
VDD
VREG
VBAT
VDDO
ZIN
AV
THD
Vo
IN pin
Input Signal Level
=200mVrms
Output THD=10%
2.6
2.6
2.6
8.0
-
-
-
-
2.85
2.85
3.7
10.0
20
31
0.05
8.0
3.6 V
3.6 V
4.2 V
12.0 V
- KΩ
- dB
0.08 %
- Vrms
4
S/N
SN A weight
- 80 - dB 4
Operating Current(Standby)
IST EN1=EN2=0V
Operating Current
(No signal input)
ISS
No-load operating
No Signal Input
- - 1 µA
- 10 15 mA
Input Voltage
Input Leakage Current
Switching regulator
Oscillating Frequency
VIH EN1, EN2 pins
VIL EN1, EN2 pins
ILK EN1, EN2 pins
fOSC
0.7VDD
-
VDD V
0
-
0.3VDD
V
- - ±1.0 µA
220 300 380 kHz
Switching regulator
Maximum Load Current
Switching regulator
Load Stability
IOUT
∆VOUT
Step-up Voltage =10.0V
VOUT= 10.0V X 95%
Step-up Voltage =10.0V
IOUT =10mA~50mA
50 -
- 100
- mA
- mV
Ver.2003-09-26
-5-
5 Page | ||
| Páginas | Total 7 Páginas | |
| PDF Descargar | [ Datasheet NJU8753.PDF ] | |
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