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NCP345SNT1GON安森美N/a500avaiOvervoltage Protection IC


NCP345SNT1G ,Overvoltage Protection ICELECTRICAL CHARACTERISTICS(For typical values T = 25°C, for min/max values T = −40°C to +85°C, V = ..
NCP346SN1T1G ,Over Voltage Supervisory IC for Adapter Input ProtectionBlock DiagramPIN FUNCTION DESCRIPTIONSPin # Symbol Pin Description1 OUT This signal drives the gate ..
NCP346SN2T1G ,Over Voltage Supervisory IC for Adapter Input ProtectionELECTRICAL CHARACTERISTICS (NCP346SN1T1)(For typical values T = 25°C, for min/max values T = −40°C ..
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NCP345SNT1G
Single Stage Power Factor Controller
NCP345
Overvoltage Protection IC
The NCP345 overvoltage protection circuit (OVP) protects
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.
The device is optimized for applications that have an external
AC/DC adapter or car accessory charger to power the product and/or
recharge the internal batteries. The nominal overvoltage threshold is
6.85 V so it is suitable for single cell Li−Ion applications as well as 3/4
cell NiCD/NiMH applications.
Features
Overvoltage Turn−Off Time of less than 1.0 �sec Accurate V oltage Threshold of 6.85 V (nominal) Undervoltage Lockout Protection CNTRL Input Compatible with 1.8 V Logic Levels Pb−Free Package is Available
Typical Applications
Cellular Phones Digital Cameras Portable Computers and PDAs Portable CD and other Consumer Electronics
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