VPN12AD02-FU datasheet(14/22 Pages) CYNTEC

tên linh kiện	VPN12AD02-FU

Giải thích chi tiết về linh kiện	Buck-Boost, High Efficiency POL Module

PDF	22 Pages

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nhà sản xuất	CYNTEC [Cyntec Co., Ltd.]

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14 / 22 page

Rev. P05

VPN12AD02-FU

Output Protection:

The VFB pin measures the VOUT to detect the protection of short to ground, open load and

output overvoltage. The Fault pins of EF1 and EF2 diagnostic truth table are as following.

FIG.31 VFB Protection Pin

Fault Condition

EF1

EF2

Gate Driver

IVCC

No Fault occur

Switching

Active

Output over voltage

Active

Output short circuit

Active

Over temperature

Shutdown

FIG.32 Diagnostic Truth Table

Overvoltage Protection:

The pin VFB rise over the threshold voltage VVFB_OVTH overvoltage protection via VFB. A

voltage divider between VOUT, VFB pin is used to adjust the overvoltage protection threshold as

following equation. 1.5kΩ is suggested for RVFBL.

RVFBH + RVFBL

VOUT_OVP = VVFB_OVTH

RVFBL

. (

)

Short Circuit Protection:

The VFB pin falls below the VVFB_S2G short circuit threshold is ignored until the soft start finishes.

A voltage divider between VOUT, VFB pin is used to adjust the application short circuit

thresholds as following equation. 1.5kΩ is suggested for RVFBL.

VLED_SHORT = VVFB_S2G

RVFBH + RVFBL

RVFBL

(

)

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