PFS7623L datasheet(11/38 Pages) POWERINT

11 / 38 page

Rev. F 08/20

PFS7x23-7x29/7633-7636

www.power.com

Open FEEDBACK Pin Protection

The FEEDBACK pin continuously sinks a static current of I

FBPD [VCC

>VCC

UVLO+] to protect against a fault related to an open FEEDBACK pin

or incomplete feedback divider network. The internal current sink

introduces a small static offset to the output regulation which can be

accounted for in selecting the output feedback regulation components

(FEEDBACK pin divider).

Hysteretic Thermal Shutdown

The thermal shutdown circuit senses the controller die temperature

which is well coupled to the heat sink through the exposed, grounded

pad. The threshold is set at 117 °C typical with a 36 °C hysteresis.

When the controller die temperature rises above this threshold (OTP),

the controller initiates a soft-shutdown and remains disabled until the

controller die temperature falls by ~36 °C, at which point the device

will re-initiate the start-up sequence.

The maximum time delay for soft-shutdown to occur after an OTP

event is detected is t

OTP beyond the next zero-crossing.

HiperPFS-4 Additional Features and Changes

HiperPFS-4 (eSIP) maintains similar pin-out as HiperPFS-3.

• The breakdown voltage rating of the PFC MOSFET and diode has

been increased to 600 V.

• PFC output voltage can be designed for up to 440 VDC output to

allow operation with 277 VAC line voltage.

PFS7623L 数据表(PDF) 11 Page - Power Integrations, Inc.