NCP346SN2T1G ON Semiconductor, NCP346SN2T1G Datasheet

Supervisory Circuits 5.5V Overvoltage Supervisor

NCP346SN2T1G

Manufacturer Part Number
NCP346SN2T1G
Description
Supervisory Circuits 5.5V Overvoltage Supervisor
Manufacturer
ON Semiconductor
Datasheet

Specifications of NCP346SN2T1G

Number Of Voltages Monitored
1
Monitored Voltage
5.5 V
Overvoltage Threshold
Adjustable, 4.55 V
Output Type
PFET Driver
Manual Reset
Resettable
Watchdog
No Watchdog
Supply Voltage (max)
25 V
Supply Voltage (min)
2.5 V
Supply Current (typ)
650 uA
Maximum Power Dissipation
216 mW
Maximum Operating Temperature
+ 85 C
Mounting Style
SMD/SMT
Package / Case
SOT-23-5 Thin (TSOP-5)
Minimum Operating Temperature
- 40 C
Lead Free Status / Rohs Status
Lead free / RoHS Compliant

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NCP346
Overvoltage Protection IC
sensitive electronic circuitry from overvoltage transients and power
supply faults when used in conjunction with an external P−channel
FET. The device is designed to sense an overvoltage condition and
quickly disconnect the input voltage supply from the load before any
damage can occur. The OVP consists of a precise voltage reference, a
comparator with hysteresis, control logic, and a MOSFET gate driver.
The OVP is designed on a robust BiCMOS process and is intended to
withstand voltage transients up to 30 V.
AC/DC adapter or car accessory charger to power the product and/or
recharge the internal batteries. The nominal overvoltage thresholds are
4.45 and 5.5 V and can be adjusted upward with a resistor divider
between the V
Li−Ion applications as well as 3/4 cell NiCD/NiMH applications.
Features
Typical Applications
© Semiconductor Components Industries, LLC, 2006
September, 2006 − Rev. 6
The NCP346 Overvoltage Protection circuit (OVP) protects
The device is optimized for applications that have an external
Overvoltage Turn−Off Time of Less Than 1.0 msec
Accurate Voltage Threshold of 4.45 V and 5.5 V (Nominal)
CNTRL Input Compatible with 1.8 V Logic Levels
These are Pb−Free Devices
Cellular Phones
Digital Cameras
Portable Computers and PDAs
Portable CD and other Consumer Electronics
Accessory Charger
AC/DC Adapter or
CC
, IN, and GND pins. It is suitable for single cell
(optional)
(optional)
IN
GND
Figure 1. Simplified Application Diagram
+
V
ref
V
CC
Logic
1
CNTRL
Microprocessor port
NCP346
Driver
FET
Note: This device contains 89 active transistors
NCP346SN1T1G SOT−23−5
NCP346SN2T1G
†For information on tape and reel specifications,
OUT
including part orientation and tape sizes, please
refer to our Tape and Reel Packaging Specifications
Brochure, BRD8011/D.
P−CH
Device
5
CNTRL
GND
ORDERING INFORMATION
xxx = SQZ for NCP346SN1
A
Y
W
G
(Note: Microdot may be in either location)
OUT
1
PIN CONNECTIONS &
MARKING DIAGRAM
http://onsemi.com
= SRD for NCP346SN2
= Asembly Location
= Year
= Work Week
= Pb−Free Package
1
2
3
Schottky
(Pb−Free)
Diode
Package
(Top View)
Publication Order Number:
THIN SOT−23−5
SN SUFFIX
+
CASE 483
5
4
3000 / Tape & Reel
C1
(7 inch Reel)
V
IN
Shipping
CC
LOAD
NCP346/D

Related parts for NCP346SN2T1G

NCP346SN2T1G Summary of contents

Page 1

... ORDERING INFORMATION Device Package Shipping NCP346SN1T1G SOT−23−5 3000 / Tape & Reel (Pb−Free) (7 inch Reel) NCP346SN2T1G †For information on tape and reel specifications, including part orientation and tape sizes, please refer to our Tape and Reel Packaging Specifications Brochure, BRD8011/D. Schottky Diode P−CH ...

Page 2

IN ( Pre−regulator R1 R2 Bandgap Reference CNTRL (3) PIN FUNCTION DESCRIPTIONS Pin # Symbol 1 OUT This signal drives the gate of a P−channel MOSFET controlled by the voltage level the logic ...

Page 3

MAXIMUM RATINGS (T = 25°C unless otherwise noted.) A Rating OUT Voltage to GND Input and CNTRL Pin Voltage to GND Input Pin Voltage Maximum Range CC Maximum Power Dissipation 85°C A Thermal ...

Page 4

ELECTRICAL CHARACTERISTICS (NCP346SN1T1) (For typical values T = 25°C, for min/max values T A Characteristic V Operating Voltage Range CC Total Supply Current (IN Connected CNTRL Pin Floating, Steady State) Total Supply Current (IN Connected to V ...

Page 5

ELECTRICAL CHARACTERISTICS (NCP346SN2T1) (For typical values T = 25°C, for min/max values T A Characteristic V Operating Voltage Range CC Total Supply Current (IN Connected CNTRL Pin Floating, Steady State) Total Supply Current (IN Connected to V ...

Page 6

AC/DC Adapter or Accessory Charger (optional) IN Zener (opt.) Diode (optional) GND Introduction In many electronic products, an external AC/DC wall adapter is used to convert the AC line voltage into a regulated DC voltage or a current limited source. ...

Page 7

... V, therefore, one must ensure that: Where 0.5 = V(V Therefore, the NCP346 should only be adjusted to maximum overvoltage thresholds which are less than greater thresholds are desired than can be accommodated does play the NCP346, ON Semiconductor offers the NCP345 which can withstand those voltages (eq http://onsemi ...

Page 8

Design Steps for Adjusting the Overvoltage Threshold 1. Use Typical R , and V Values from the Electrical in th Specifications 2. Minimize R Effect by Selecting ...

Page 9

Table 1. Design Steps 1−5 Parameter IN Pin Input Impedance ( Input Threshold ( Ratio ( Desired Overvoltage Threshold ( Table 2. Design Steps ...

Page 10

Vth (V Increasing) CC 4.45 Vth (V Decreasing) CC 4.4 4.35 4.3 −40 −25 − AMBIENT TEMPERATURE (°C) Figure 5. Typical Vth Variation vs. Temperature (NCP346SN1) 900 800 Overvoltage Tripped ( ...

Page 11

AMBIENT TEMPERATURE (°C) Figure 11. Typical OUT Sink Current vs. Temperature (NCP346SN1) NCP346 ...

Page 12

NCP346 V CNTRL V Load Figure 13. Typical Turn−off Time CNTRL (NCP346SN1) V CNTRL V Load Figure 14. Typical Turn−off Time CNTRL (NCP346SN2) http://onsemi.com 12 MOSFET = NTHS4101PT1 C1= N/C Load = 50 W (See Figure 3) MOSFET = NTHS4101PT1 ...

Page 13

NCP346 V CNTRL V Load Figure 15. Typical Turn−on Time CNTRL (NCP346SN1) V CNTRL V Load Figure 16. Typical Turn−on Time CNTRL (NCP346SN2) http://onsemi.com 13 MOSFET = NTHS4101PT1 C1 = N/C Load = 50 W (See Figure 3) MOSFET = ...

Page 14

The power dissipation of the Thin SOT−23− function of the pad size. This can vary from the minimum pad size for soldering to a pad size given for maximum power dissipation. Power dissipation for a surface mount device ...

Page 15

... H *For additional information on our Pb−Free strategy and soldering details, please download the ON Semiconductor Soldering and Mounting Techniques Reference Manual, SOLDERRM/D. ON Semiconductor and are registered trademarks of Semiconductor Components Industries, LLC (SCILLC). SCILLC reserves the right to make changes without further notice to any products herein ...

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