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PDF NJU72501 Data sheet ( Hoja de datos )
| Número de pieza | NJU72501 | |
| Descripción | Piezo-sounder Driver | |
| Fabricantes | New Japan Radio | |
| Logotipo |  |
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NJU72501
Piezo-sounder Driver with Multi-mode charge pump
■GENERAL DESCRIPTION
The NJU72501 is a switching driver with multi mode charge pump
for piezo-sounder. It can drive outputs up to 18Vpp from 3V supply.
For adjusting the piezoelectric sounder sound volume, the charge
pump can operate in either of a 1x, 2x or 3x mode.
Because NJU72501 has the shutdown function, it is suitable for
the battery application.
■PACKAGE OUTLINE
NJU72501MJE NJU72501MG2
■APPLICATION
Healthcare, Wrist Watches, Alarm Clocks, Handheld GPS devices, PDAs
■FEATURES
Operating Voltage
: 2.3 to 5.0V(1x/ 2x Mode), 2.3 to 3.4V(3x Mode)
Consumption current (Active) : IDS=0.3mA typ. (VIN=3V, DIN=4kHz, CPIEZO=15nF, 1x Mode)
(Shutdown): IDS=1uA max. (VIN=3V , DIN=0V)
Multi-Mode Charge Pump (1x/2x/3x)
Input Signal Detector & Shutdown Control
Output Short-circuit Protection Circuit
C-MOS Technology
Package Outline
: EQFN12-JE, EQFN16-G2
Direct replacement to MAS6240
■BLOCK DIAGRAM
VIN
CIN=0.1uF
EN1
EN2
DIN
GND
C1=0.1uF
C2=0.1uF
CP1 CN1 CP2
CN2
Oscillator
(1MHz)
Charge Pump
(1x / 2x / 3x)
1.7MΩ
Control
Logic
DET
Short Circuit
Protection
1.7MΩ
Level Shift
VOUT
COUT=0.1uF
VO1
piezo sounder
VO2
Ver. 6.0
-1-
1 page  
NNJUJU73250551
■ELECTRICAL CHARACTERISTICS
(Ta=25oC,VIN=3V, C1=100nF, C2=100nF, COUT=100nF, CPIEZO=15nF, DIN=4kHz)
PARAMETER
SYMBOL
CONDITIONS
MIN
TON1
1x Mode
From DIN signal High to 90% VOUT
steadystate
-
VOUT Start Delay Time
TON2
TON3
2x Mode
From DIN signal High to 90% VOUT
steadystate
3x Mode
From DIN signal High to 90% VOUT
steadystate
-
-
Shutdown Delay Time
TOFF
DIN=H -> L
21
Output Short-circuit Protection
Limitation Current
ISC
20
TYP MAX UNIT
30 100 s
90 200 s
180 350
s
42 84 Ms
40 60 mA
■CONTROL PART CHARACTERISTICS
Ta=25oC, VIN=3V
PARAMETER
SYMBOL
CONDITIONS
Control Terminal Voltage H
VIH EN1 , EN2 , DIN pins
MIN
0.8*VIN
TYP
-
MAX
VIN
UNIT
V
Control Terminal Voltage L
VIL EN1 , EN2 , DIN pins
0 - 0.2*VIN V
Control Terminal Current 1
IIH1 DIN=3V
- 1.7 3.4 A
Control Terminal Current 2
IIH2 VEN1 , VEN2=3V , DIN=3V
- 1.7 3.4 A
Control Terminal Current 3
IIH3 VEN1 , VEN2=3V , DIN=0V
- - 1 A
Ver.6.0
-5-
5 Page | ||
| Páginas | Total 9 Páginas | |
| PDF Descargar | [ Datasheet NJU72501.PDF ] | |
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