AL1697

Document number: DS38223 Rev. 3 - 2

10 of 13

www.diodes.com

January 2016

© Diodes Incorporated

AL1697

The passive bleeder includes a capacitor (C2, in hundreds of nF) to provide latching current. A resistor (R1) is necessary to dampen the current

spike. Because a large C2 will affect the PF, THD and efficiency, the value of the capacitor (C2) should be selected accordingly. Generally,

100nF/400V to 330nF/400V is recommended. R1 is used to limit the latching current, If R1 is too large, the latching current is not enough and the

TRIAC dimmer will misfire causing LED flicker. If R1 is too small, it will result in greater power dissipation. Generally speaking

, a 200Ω to 2KΩ

resistor is selected for R1.

Passive Damping Design

FR1 is the damper for reducing the spike current caused by quick charging of C2 at firing. In General, FR1

is selected from 20Ω to 100Ω for low

Ordering Information

Part Number

Package Code

Package

13

” Tape and Reel

Quantity

Part Number Suffix

AL1697-20CS7-13

S7

SO-7

4000/Tape & Reel

-13

AL1697-40DS7-13

S7

SO-7

4000/Tape & Reel

-13

Marking Information

(1)

SO-7

1697 - ZZZ

(Top View)

YY WW X X

Part Number

1697-20C for 2.0A/600V

1697-40D for 4.0A/700V

Logo

WW : Week : 01~52; 52

YY : Year : 15,16,17 ~

X X : Internal Code

7

6

5

1

2

3

4

represents 52 and 53 week

20 : 2.0A

40: 4.0A

AL1697–XX X XX–13

MOSFET Voltage

Current Option

C: 600V

D: 650V

S7 : SO-7

Package

Packing

13 :13" Tape & Reel

1697-20C for 2.0A/600V

1697-40D for 4.0A/650V