UBA20271 datasheet(26/33 Pages) NXP

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UBA20271_UBA20272

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Product data sheet

Rev. 2.1 — 12 October 2011

26 of 33

NXP Semiconductors

UBA20271/2

350 V and 600 V Power ICs for dimmable compact fluorescent lamps

Table 6.

Typical components for a 230 V mains application

Reference Component

Description

UBA20271

UBA20272



2 W fusible resistor

R2, R3

110 k



220 k



22 k



22 k



R5, R6

110 k



330 k



R7, R10

100 k



100 k



560



1 k



1 k



1 k



R11

39 k



39 k



RREF

33 k

; 1 %

33 k

; 1 %

RSLS



1.2



RMDL

1 k



1 k



RCSI

8.2



8.2



Adjust for nominal lamp

current

RLSAT

100 k



100 k



RLSAT depends on the

LSAT rating of the lamp

inductor

C1, C2

22 nF; 400 V

22 nF; 630 V

3.3 nF; 1000 V

F; 250 V

F; 400 V

6.8 nF; 1000 V

4.7 nF; 1000 V

lamp capacitor

C6, C14

470 nF

100 pF

22 nF; 400 V

47 nF; 400 V

560 pF; 500 V

VDD charge pump

capacitor

C10

not mounted

C11

4.7 nF

C12

100 nF

C13

470 nF

C15

220 nF

C16

not mounted

C17

22 nF; 250 V

22 nF; 400 V

CCB

150 nF

CCP

470 nF

CCF

100 pF; 2 %

CLSAT

1 nF

D1 to D4

1N4007

D5, D6

1N4937

BZX84JC12

1N4148

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