400DAFBA2 datasheet(3/47 Pages) ONSEMI

3 / 47 page

NCP12400

www.onsemi.com

Table 2. SPECIFIC DEVICE CODE KEY

400

Part

OCP Fault

Frozen Current

Setpoint

Quiet Skip

Soft Start

Frequency

A − 229−211 V

B − 111−103 V

C − 95−93 V

D − No BO

E − Brown In, no BO

A − Latched

B − Autorecovery

A −No

B − 150 mV

C − 170 mV

D − 190 mV

E − 210 mV

F − 230 mV

G − 250 mV

H − 300 mV

A − No, min. 3

pulses

B − Yes, min. 3

pulses,

800 Hz burst

A − 10 ms

B − 4 ms

0 − 65 kHz

1 − 100 kHz

2 − 65 → 100 kHz

Table 3. PIN FUNCTION DESCRIPTION

Pin #

Pin Name

Function

Pin Description

FAULT

FAULT Input

Pull the pin up or down to stop the controller. An internal current source allows the

direct connection of an NTC for over temperature detection. Device can restart in

autorecovery mode or can be latched depending on the option.

Feedback + Shutdown

An optocoupler connected to ground controls the output regulation. The part goes to

the low consumption Off mode if the FB input pin is pulled to GND.

Current Sense

This input senses the primary current for current−mode operation, and offers an

overpower compensation adjustment. This pin implements over voltage protection

as well.

GND

The controller ground.

DRV

Drive Output

Drives external MOSFET.

VCC

VCC Input

This supply pin accepts up to 28 Vdc, with overvoltage detection. The pin is

connected to an external auxiliary voltage.

High−Voltage Pin

Connects to the rectified ac line to perform the functions of start−up current source,

Self−Supply, brown−out detection and X2 capacitor discharge function and the HV

sensing for the overpower protection purposes.

It is not allowed to connect this pin to a dc voltage.

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