DAP018x Marking, DAP018DDR2G datasheet(17/28 Pages) ONSEMI

Part #	DAP018DDR2G

Description	PWM Current-Mode Controller for High-Power Universal Off-Line Supplies

PDF	28 Pages

Scroll/Zoom	100%

Manufacturer	ONSEMI [ON Semiconductor]

Direct Link	http://www.onsemi.com

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17 / 28 page

DAP018A/B/C/D/F

http://onsemi.com

Timer

< 100ms

Drv

100ms

Duration given

by timer

Reg.

100ms

IpFlag

Figure 36. This Case is Similar to a Short−circuit where Vaux does NOT Collapse

VFB

VCC

VCC(on)

VCC(min)

VCCreset

VCClatch

Vout is overloaded (aux is alive)

3. A third case exists where the short−circuit makes

the auxiliary level go below VCC(min). In that case,

the timer length is truncated and all pulses are

stopped. The double hiccup fault mode is entered

and the SMPS tries to re−start. When the fault is

removed, the SMPS resumes operation.

Timer

Drv

Reg.

Duration given

by aux. cap.

< 100ms

IpFlag

Figure 37. This Case is Similar to a Short−circuit where Vaux Does Collapse

VFB

VCC

VCC(on)

VCC(min)

VCCreset

VCClatch

Vout is shorted (aux is gone)

DAP018x Marking, DAP018DDR2G Datasheet(PDF) 17 Page - ON Semiconductor