NJU72501
-
1
-
Ver. 7.1
Piezo-sounder Driver w ith Multi-mode charge pump
■GENERAL DESCRIPTION ■PACKAGE OUTL INE
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 adjus t ing the piezoelectric sounder sound volume, the charge
pum p can operate in either of a 1x, 2x or 3x mode.
Because NJU72501 has the shutdown function, it is suitable for
the battery application.
■APPLICATION
Healthcare, Wrist Watches, Alarm Clocks, Handheld G PS 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=4kH z, 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 Shor t -circuit Protection Circuit
C-MOS Technology
Pack age Outline : EQFN12-JE, EQFN 16-G2, SSOP14
Direct replacement to M AS6240
■BLOCK DIAGRAM
NJU72501MJE
Charge Pump
(1x / 2x / 3x)
Short Circuit
Protection
Oscillator
(1MHz)
Control
Logic
Level Shift piezo sounder
GND
DIN
EN2
EN1
VIN
CP1 CN1 CP2 CN2
C1=0.1uF
CIN=0.1uF
COUT=0.1uF
VOUT
VO1
VO2
C2=0.1uF
1.7MΩ
1.7MΩ
DET
NJU72501MG2
NJU72501V
NJU72501
-
2
-
Ver.7.1
■TERMINAL CONFIGURATION (EQFN12-JE)
■PIN DESCRIPTION
Pin No.
SYMBOL FUNCTION
1 EN1 Step-up Mode Switch Terminal 1
2 EN2 Step-up Mode Switch Terminal 2
3 DIN Input Terminal
4 CN1 Capacitor Connection Terminal
5 GND GND Terminal
6 VO2 Output Terminal 2
7 VO1 Output Terminal 1
8 CN2 Capacitor Connection Terminal
9 CP1 Capacitor Connection Terminal
10 VOUT Charge Pump Output Terminal
11 CP2 Capacitor Connection Terminal
12 VIN Power Supply Terminal
Exp Pad
Exposed Pad
Exposed Pad connected to GND or left floating
1pin
4pin
7pin
10pin
Top view
Exposed Pad
(Back Side)
NJU3555NJU3555
NJU72501
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3
-
Ver.7.1
■TERMINAL CONFIGURATION (EQFN16-G2)
■PIN DESCRIPTION
Pin No.
SYMBOL FUNCTION
1 NC
2 EN1 Step-up Mode Switch Terminal 1
3 EN2 Step-up Mode Switch Terminal 2
4 DIN Input Terminal
5 NC
6 CN1 Capacitor Connection Terminal
7 GND GND Terminal
8 VO2 Output Terminal 2
9 VO1 Output Terminal 1
10 CN2 Capacitor Connection Terminal
11 CP1 Capacitor Connection Terminal
12 NC
13 VOUT Charge Pump Output Terminal
14 CP2 Capacitor Connection Terminal
15 VIN Power Supply Terminal
16 NC
Exp Pad
Exposed Pad
Exposed Pad connected to GND or left floating
NJU72501
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4
-
Ver.7.1
■TERMINAL CONFIGURATION (SSOP14)
Pin No. SYMBO L FUNCTION
1 EN2 Step-up Mode Switch Terminal 2
2 DIN Input Terminal
3 CN1 Capacitor Connection Terminal
4 GND GND Terminal
5 VO2 Output Terminal 2
6 VO1 Output Terminal 1
7 CN2 Capacitor Connection Terminal
8 CP1 C apacitor Connection Terminal
9 NC
10 VOUT Charge Pump Output Terminal
11 CP2 Capac itor Connection Terminal
12 VIN Power Supply Ter minal
13 NC
14 EN1 Step-up Mode Switch Terminal 1
NJU3555NJU3555
NJU72501
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5
-
Ver.7.1
■ABSOLUTE MAXIMUM RATINGS
PARAMETER SYMBOL
RATING UNIT
Supply Voltage VIN 5.5V 1x Mode, 2x Mode
4.0V 3x Mode
V
Input Voltage VDIN -0.3 to VIN+0.3 V
Power Dissipation PD 480 *
1)
/ 1300 *
2
)
(EQFN12)
400 *1) / 1000 *2) (EQFN16)
440 *3)/550 *4) (SSOP14) mW
Operating Temperature Topr -40 to +8 5 C
Storage Temperature Ts tg -40 to +125 C
(Note) *1) EIA/JEDEC STANDARD Test board (76.2 x 114.3 x 1.6mm, 2layers, FR-4) mounting. The PAD connecting to GND in the center part
on the back.
*2) EIA/JEDEC STANDARD Test board (76.2 x 114.3 x 1.6mm, 4layers, FR-4) mounting. The PAD connecting to GND in the center part
on the back. Applying a thermal via hole mounted.
*3) EIA/JEDEC STANDARD Test board (76.2 x 114.3 x 1.6mm, 2layers, FR-4) mounting.
*4) EIA/JEDEC STANDARD Test board (76.2 x 114.3 x 1.6mm, 4layers, FR-4) mounting.
■RECOMMENDED OP EARATING CONDITION (Ta=25oC)
PARAM ETER SYMBOL
CONDITIONS MIN TYP MAX UNIT
Operating Voltage VIN 1x Mode, 2x Mode 2.3 3.0 5.0 V
1x Mode, 2x Mode, 3x M ode 2.3 3.0 3.4
■ELECTRICAL CHARACTERISTICS
(Ta=25oC,VIN=3V, C1=100nF, C2=100nF, COUT=100nF, CPIEZO=15nF, DIN=4kHz)
PARAMETER SYMBOL
CONDITIO NS MIN TYP MAX UNIT
Output Voltage
VOUT1 1x Mode 2.8 - 3 V
VOUT2 2x Mode 5.2 - 6 V
VOUT3 3x Mode 7.2 - 9 V
Operating Current 1
IDD11 1x Mode
C
PIEZO
=no load - 140 240 A
IDD12 2x Mode
C
PIEZO
=no load - 720 1200 A
IDD13 3x Mode
C
PIEZO
=no load - 2500 4500 A
Operating Current 2
IDD21 1x Mode
Single ended application - 0.3 - m A
IDD22 2x Mode
Single ended application - 1.4 - m A
IDD23 3x Mode
Single ended application - 3.9 - m A
Operating Current 3
IDD31 1x Mode
Differential application - 0.9 - mA
IDD32 2x Mode
Differential application - 3.6 - mA
IDD33 3x Mode
Differential application - 7.9 - mA
Consumption Current
at Shutdown ISD DIN=0V , (*1 - - 1 A
Input Frequency FIN Rec tangular pulse 0.2 4 8 kHz
Oscillating Frequency FOSC 0.6 1 1.8 MHz
(*1: When 50msec or more maintains DIN, EN1, EN2 in 0
NJU72501
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6
-
Ver.7.1
■ELECTRICAL CHARACTERISTICS
(Ta=25oC,VIN=3V, C1=100nF, C2=100nF, COUT=100nF, CPIEZO=15nF, DIN=4kHz)
PARAMETER SYMBOL
CONDITIO NS MIN TYP MAX UNIT
VOUT Start Delay Time
TON1 1x Mode
From DIN signal High to 90% VOUT
steady state
- 30 100 s
TON2 2x Mode
From DIN signal High to 90% VOUT
steady state
- 90 200 s
TON3 3x Mode
From DIN signal High to 90% VOUT
steady state
- 180 350 s
Shutdown Delay Time TOFF DIN=H -> L 21 42 84 Ms
Output Short-circuit Protection
Limitation Current ISC 20 40 60 mA
■CONTROL PART CHARACTERISTICS
Ta=25oC, VIN=3V
PARAMET ER S YMBOL
CONDITIONS MIN TYP MAX UNIT
Control Terminal Voltage H VIH EN1 , EN2 , DIN p ins 0.8*VIN
- VIN V
Control Terminal Voltage L VIL EN 1 , 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 , D IN=0V - - 1 A
NJU3555NJU3555
NJU72501
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7
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Ver.7.1
■CHARGE PUMP MODE SETTING
DIN EN1 EN2 Charge Pump Mode
0 - - Shut Down Mode
1 0 0 Shut Down Mode
1 0 1 1x Mode
1 1 0 2x Mode
1 1 1 3x Mode
■TIMING CHART
VOUT
VO2
VO1
DIN
V
V
V
V
TOFF
t
t
t
t
C/P ON C/P OFF
TON
NJU72501
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8
-
Ver.7.1
■APPLICATION CIRCUIT 1 (Single-end output)
■APPLICATION CIRCUIT 2 (Differential output)
Charge Pump
(1x / 2x / 3x)
Short Circ uit
Protection
Oscillator
(1MHz)
Control
Logic
Level S hift piezo sounder
GND
DIN
EN2
EN1
VIN
CP1 CN1 CP2 CN2
C1=0.1uF
CIN=0.1uF
COUT=0.1uF
VOUT
VO1
VO2
C2=0.1uF
1.7MΩ
1.7MΩ
DET
Charge Pump
(1x / 2x / 3x)
Short Circuit
Protection
Oscillator
(1MHz)
Control
Logic
Level Shift piezo sounder
GND
DIN
EN2
EN1
VIN
CP1 CN1 CP2 CN2
C1=0.1uF
CIN=0.1uF
COUT=0.1uF
VOUT
VO1
VO2
C2=0.1uF
1.7MΩ
1.7MΩ
DET
Recommended Parts
Piezo-sounder/ Piezo-buzzer
PKLCS1212E2400-R1(muRata)
PKLCS1212E4001-R1(muRata)
PKM13EPYH4000
-
A0(mu
Rata)
NJU3555NJU3555
NJU72501
-
9
-
Ver.7.1
■PACKAGE INFORMATION (EQFN12-JE)
NJU72501
-
10
-
Ver.7.1
■PACKAGE INFORMATION (EQFN16-G2)
NJU3555NJU3555
NJU72501
-
11
-
Ver.7.1
■PACKAGE INFORMATION (SSOP14)
[CAUTION]
The specifications on this databook are only
given for information , without any guarantee
as regards either mi stakes or omissions. The
application circuits in this databook are
described only to s how representative usages
of the product and not intended for the
guarantee or permission of any right including
the industrial rights.
