uba20271 NXP Semiconductors, uba20271 Datasheet - Page 25

• Manufacturer Part Number: uba20271
• Description: 350 V And 600 V Power Ics For Dimmable Compact Fluorescent Lamps
• Manufacturer: NXP Semiconductors

NXP Semiconductors
UBA20271_UBA20272
Product data sheet
Fig 11. Application diagram
R1
C1
L1
11.1.4 R
11.1.5 R
11.1.6 R
C17
C2
Where: C
Detailed in
V
V
D1
D3
I
•
ph M
•
•
MDL
th sat
SLS
MDL
LSAT
f
f
bridge min
D5
bridge bst

 
Minimum bridge frequency with enabled boost
MDL threshold voltage:
Saturation threshold voltage
R4
related preheat current:
D2
D4
SLS
related MDL:
=
related saturation and overcurrent threshold level
=


D6
C3
R
par
V
------------------- -
R2
R3
MDL
C11
=
min
Table 6
ph SLS
R

= 4.7 [pF] and t
SLS
=

V

th ocp
C4
All information provided in this document is subject to legal disclaimers.
--------------------------------------------------------------------------- -
C
---------------------------
=
350 V and 600 V Power ICs for dimmable compact fluorescent lamps

I
I

CF
source MDL
o CF
CFL
--------------------------------------------------------------------------- -
C
---------------------------
C5

is a list of typical application components. See
I
CF
SLS
+
o bst

Rev. 2 — 8 September 2011
min
C
+
R CSI

C8
I
par
ph RMS
CF
R7
C
=
L2

par

R

dch
R9
LSAT
0.5
V

th CF

C14
C9
C10
0.5
V
= 0.4 [s] (typical)
D9


th CF
------------------------ -
R


V
max
SLS
I
ph SLS
source LSAT
R11
D7
D8
max


R10
+
t


3
dch
+
R5
R6
R SLS
t
C13
dch
C7

C12
HBO
HBO
HBO
DHS
C6
V
SLS
SLS
SLS
DCI
CSI
FS
DD
18
16
17
19
20
6
1
11
12
2
3
UBA20271/2
5
PGND
UBA20271/2
15
GHS
GLS
Figure
SGND
14
13
10
9
7
8
4
© NXP B.V. 2011. All rights reserved.
11.
CB
CP
CI
MDL
RREF
CF
LSAT
C15
001aam783
R LSAT
C LSAT
R MDL
R REF
C CB
C CP
C CF
C16
C8
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