The NCV107x products integrate a fixed frequency current mode

controller with a 670 V MOSFET. Available in a PDIP−7 package, the

NCV107x offer a high level of integration, including soft−start,

frequency−jittering, short−circuit protection, skip−cycle, a maximum

peak current set point, ramp compensation, and a Dynamic

Self−Supply (eliminating the need for an auxiliary winding).

Unlike other monolithic solutions, the NCV107x is quiet by nature:

during nominal load operation, the part switches at one of the available

frequencies (65, 100 or 130 kHz). When the output power demand

diminishes, the IC automatically enters frequency foldback mode and

provides excellent efficiency at light loads. When the power demand

reduces further, it enters into a skip mode to reduce the standby

consumption down to a no load condition.

Protection features include: a timer to detect an overload or a

short−circuit event, Overvoltage Protection with auto−recovery and

AC input line voltage detection.

For improved standby performance, the connection of an auxiliary

winding stops the DSS operation and helps to reduce input power

consumption below 50 mW at high line.

Features

• Built−in 670 V MOSFET with RDS(on) of 4.7  (NCV1076/77) /

11  (NCV1072/75)

• Large Creepage Distance Between High−voltage Pins

• Current−Mode Fixed Frequency Operation – 65 / 100 / 130 kHz

• Peak Current: NCV1072 with 250 mA, NCV1075 with 450 mA,

NCV1076 with 650 mA and NCV1077 with 800 mA

• Fixed Ramp Compensation

• Skip−Cycle Operation at Low Peak Currents Only: No Acoustic

Noise!

• Dynamic Self−Supply: No Need for an Auxiliary Winding

• Internal 1 ms Soft−Start

• Auto−Recovery Output Short Circuit Protection with

Timer−Based Detection

• Auto−Recovery Overvoltage Protection with Auxiliary

Winding Operation

• Frequency Jittering for Better EMI Signature, Including

Frequency Foldback Mode

• No Load Input Consumption < 50 mW

• Options With or Without Brown−in Function Available

• Frequency Foldback to Improve Efficiency at Light

Load

• Internal Temperature Shutdown

• NCV Prefix for Automotive and Other Applications

Requiring Unique Site and Control Change

Requirements; AEC−Q100 Qualified and PPAP

Capable

• These Devices are Pb−Free, Halogen Free/BFR Free

and are RoHS Compliant

Typical Applications

• Auxiliary & Standby Isolated Power Supplies for

HEV/EV