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PDF NCP347 Data sheet ( Hoja de datos )
| Número de pieza | NCP347 | |
| Descripción | Positive Overvoltage Protection Controller | |
| Fabricantes | ON Semiconductor | |
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NCP347www.DataSheet4U.com
Positive Overvoltage
Protection Controller with
Internal Low RON NMOS FET
and Status FLAG
The NCP347 is able to disconnect the systems from its output pin
in case wrong input operating conditions are detected. The system is
positive overvoltage protected up to +28 V.
Due to this device using internal NMOS, no external device is
necessary, reducing the system cost and the PCB area of the
application board.
The NCP347 is able to instantaneously disconnect the output from
the input, due to integrated Low RON Power NMOS (65 mW), if the
input voltage exceeds the overvoltage threshold (OVLO) or
undervoltage threshold (UVLO).
At powerup (EN pin = low level), the Vout turns on 50 ms after the
Vin exceeds the undervoltage threshold.
The NCP347 provides a negative going flag (FLAG) output, which
alerts the system that a fault has occurred.
In addition, the device has ESD-protected input (15 kV Air) when
bypassed with a 1.0 mF or larger capacitor.
Features
•ăOvervoltage Protection up to 28 V
•ăOn-Chip Low RDS(on) NMOS Transistor: 65 mW
•ăInternal Charge Pump
•ăOvervoltage Lockout (OVLO)
•ăUndervoltage Lockout (UVLO)
•ăInternal 50 ms Startup Delay
•ăAlert FLAG Output
•ăShutdown EN Input
•ăCompliance to IEC61000-4-2 (Level 4)
ą8.0 kV (Contact)
ą15 kV (Air)
•ăESD Ratings: Machine Model = B
Human Body Model = 3
•ă10 Lead WDFN 2.5x2 mm Package
•ăThis is a Pb-Free Device
Applications
•ăCell Phones
•ăCamera Phones
•ăDigital Still Cameras
•ăPersonal Digital Applications
•ăMP3 Players
http://onsemi.com
MARKING
DIAGRAM
WDFN10
MT SUFFIX
CASE 516AA
BAx M
G
BAx = Specific Device Code
M = Date Code
G = Pb-Free Package
PIN CONNECTIONS
IN 1
GND 2
FLAG 3
PAD1
GND
10 EN
9 NC
8 NC
IN 4
IN 5
PAD2
IN
7 OUT
6 OUT
(Top View)
ORDERING INFORMATION
See detailed ordering, marking and shipping information in the
package dimensions section on page 12 of this data sheet.
©Ă Semiconductor Components Industries, LLC, 2007
September, 2007 - Rev. 0
1
Q
Publication Order Number:
NCP347/D
1 page  
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Vin
Vout
FLAG
NCP347
TIMING DIAGRAMS
UVLO
ton
0.3 V
tstart
<OVLO
Vin - (RDS(on) I)
1.2 V
Figure 3. Startup
OVLO
Vin
Vout
Vin - (RDS(on)
I)
toff
0.3 V
FLAG
tstop
0.4 V
Figure 4. Shutdown on Overvoltage Detection
EN
Vout
Vin - (RDS(on)
I)
1.2 V
tdis
FLAG
0.3 V
Figure 5. Disable on EN = 1
EN
Vin
FLAG
1.2 V
OVLO
UVLO
100 ms
Figure 6. FLAG Response with EN = 1
http://onsemi.com
5
5 Page 
NCP347
www.DataS3h1e0et4U.com
290
270
1 oz C.F.
250 2 oz C.F.
230
1 oz Sim
2 oz Sim
210
190
175
150
0 25 50 75 100 125 150 175 200 225 250 275 300 325350
COPPER HEAT SPREADING AREA (mm2)
Figure 20.
INPUT
1
2
Figure 21. Demo Board Layout
OUTPUT
1 mF 25 V X5R 0603
Murata GRM188R61E105KA12D
EN_Power
C1
EN
1 IN
4 IN
5 IN
6
OUT 7
OUT
NCP347
8
NC
NC 9
10 EN
3
FLAG
GND
2
EN_State
C2
100 nF 50 V X7R 0805 not necessary
FLAG Power
FLAG
R1
1M
R2 3 2 1
100 k
R3
100 k
J2
2
1
1
GND
FLAG_State
2
F1 F2 F3 F4
Figure 22. Demo Board Schematic
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11
11 Page | ||
| Páginas | Total 13 Páginas | |
| PDF Descargar | [ Datasheet NCP347.PDF ] | |
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