AN_UBA2024T_15 Datasheet, PDF (6/18 Pages) NXP Semiconductors – CFL applications

Philips Semiconductors
CFL applications with the UBA2024T
APPLICATION NOTE
4 CIRCUIT DIAGRAM
D_1..2
L_FILT
100-127V
50/60Hz
R_FUS
C_BUF1
C_HB2
C_FS
C_BUF2
L_LA
C_HB1
C_LA
C_DV
HV
UBA2024 _ROSC
FS
VDD
OUT
PGND
RC
SW
SGND
C_SW
C_VDD
C_OSC
Figure 2: Schematic of Compact Fluorescent Lamp application using the UBA2024T
with voltage doubler input
D_1..4
100-240V
50/60Hz
R_FUS
L_FILT
C_BUF
C_HB2
C_FS
L_LA
C_HB1
C_LA
C_DV
HV
UBA2024 _ROSC
FS
VDD
OUT
PGND
RC
SW
SGND
C_SW
C_VDD
C_OSC
Figure 3: Schematic of standard Compact Fluorescent Lamp application using UBA2024T
PINNING SO14
SYMBOL PIN DESCRIPTION
SGND
1 signal ground
SGND
2 signal ground
SGND
3 signal ground
HV
4 high voltage supply
SGND
5 signal ground
VDD
6 internal low voltage supply
RC
7 input for internal oscillator
SYMBOL PIN
SW
8
SGND
9
SGND
10
FS
11
PGND
12
SGND
13
OUT
14
DESCRIPTION
input for sweep timing
signal ground
signal ground
floating supply high side
power ground
signal ground
half bridge output
6