UC3726DWP datasheet(5/7 Pages) TI1

5 / 7 page

UC1726

UC2726

UC3726

TYPICAL APPLICATION

UNITRODE INTEGRATED CIRCUITS

7 CONTINENTAL BLVD.

•• MERRIMACK, NH 03054

TEL. (603) 424-2410

•• FAX (603) 424-3460

IF FAULT LOGIC NOT USED, GROUND FAULT PIN.

UDG-94006

The chip operating frequency is determined by the values

of components connected to the RT and CT pins. A resis-

tor connected between RT and ground sets the charge

current to ICT = VL / 4RT. The operating frequency varies

slightly depending on the VCC and VL voltages. The fol-

lowing equations approximate the one shot pulse width at

operating frequency when VCC = 20V.

TPW = 1.1RT(CT + 50pF)

FO

=

1

3.3

RT

(CT + 50pF)

The 50pF additional capacity represents internal chip ca-

pacitance at the CT input.

OPERATING FREQUENCY:

5

Nº de peça semelhante - UC3726DWP

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