IW1691 datasheet(21/24 Pages) DIALOG

Part #	IW1691

Description	Digital PWM Current-Mode Controller for Quasi-Resonant Operation

PDF	24 Pages

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Manufacturer	DIALOG [Dialog Semiconductor]

Direct Link	http://www.dialog-semiconductor.com/

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iW1691

Digital PWM Current-Mode Controller for Quasi-Resonant Operation

Rev. 2.0

iW1691

Page 21

FebRuaRy 3, 2012

13.0 Application Circuit

12.0 Design Example Performance Characteristics (cont.)

Figure 12.7 : T

ON Compensation Chart RDS(ON) = 55 - 250 Ω

Figure 13.1 : Typical Application Circuit

VOUT

RTN

iW1691

Csnub

Rsnub

Rvin

Cdly (opt)

Rdly (opt)

Risense

Cvcc

VSENSE

VIN

VCC

OUTPUT

ISENSE

GND

Rtvsns

Rbvsns

Cbulk

Cout

Cout (opt)

Rsd(ext)

Rpreload

Lout (opt)

2.2 kΩ

10.0 kΩ

2.7 MΩ

2.4 MΩ

10 µF

402 Ω

33 pF

3.0 Ω

20 kΩ

10 µF

470 pF

470 µF

100 µF

2.2 kΩ

330 Ω

220 kΩ

10 Ω

330 Ω

10 kΩ

470 µH

10 Ω / 1W

4 µH

470 pF

22 pF

Rgate (opt)

180

150

120

Magnetizing Inductance LM (mH)

0.75

1.50

2.25

3.0

50 mA

40 mA

30 mA

20 mA

10 mA

∆IOUT (Note1)

Note 1: ΔI

OUT refers to the difference in constant current limit between 264 Vac and 90 Vac when no RDLY and CDLY are applied.

IW1691 Datasheet(PDF) 21 Page - Dialog Semiconductor

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