400EADAB1 datasheet(39/47 Pages) ONSEMI

Teilenummer	400EADAB1

Bauteilbeschribung	Fixed Frequency Current Mode Controller for Flyback Converters

PDF	47 Pages

Scroll/Zoom	100%

Hersteller	ONSEMI [ON Semiconductor]

Direct Link	http://www.onsemi.com

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39 / 47 page

NCP12400

www.onsemi.com

Table 6. PROTECTION MODES AND THE LATCH MODE RELEASES

Event

Timer Protection

Next Device Status

Release to Normal Operation Mode

Overcurrent

VCS > VILIM

Fault timer

Latch

Autorecovery

Brown−out

VCC < VCC(reset)

Maximum on time

Fault timer

Latch

Brown−out

VCC < VCC(reset)

Maximum duty cycle

Fault timer

Latch

Brown−out

VCC < VCC(reset)

Winding short

VCS > VCS(stop)

4 consecutive pulses

Latch

Autorecovery

Brown−out

VCC < VCC(reset)

Low supply

VCC < VCC(off)

10 ms timer

Latch

Autorecovery

Brown−out

VCC < VCC(reset)

External OTP, OVP

55 ms

Latch

Brown−out

VCC < VCC(reset)

High supply

VCC > VCC(ovp)

10 ms timer

Latch

Brown−out

VCC < VCC(reset)

Brown−out

VHV < VHV(stop)

HV timer

Device stops

(VHV > VHV(start)) & (VCC > VCC(on))

Internal TSD

10 ms timer

Device stops, HV start−up

current source stops

(VHV > VHV(start)) & (VCC > VCC(on)) & TSDb

Off mode

VFB < VOFF

500 ms timer

Device stops and internal

VCC is turned off

(VHV > VHV(start)) & (VCC > VCC(on)) &

(VFB > VON)

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