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high voltage
NXP Semiconductors
HF full bridge driver IC
APPLICATION INFORMATION
Basic application
A basic full bridge configuration with an HID lamp is shown
in Fig.3. The bridge disable, the start-up delay and the
external drive functions are not used in this application.
The pins ? LVS, + LVS, EXTDR and BD are short-circuited
to SGND. The internal oscillator is used and to realize a
50% duty cycle the internal divider function has to be used
handbook, full pagewidth
550 V (max)
Product specification
UBA2033
by connecting pin DD to SGND. The IC is powered by the
high voltage supply. Because the internal oscillator is
used, the bridge commutating frequency is determined by
the values of R osc and C osc . The bridge starts oscillating
when the HV supply voltage exceeds the level of release
power drive (typically 12.5 V on pin HV). If the supply
voltage on pin HV drops below the reset level of power
drive (typically 10 V on pin HV), the UBA2033 enters the
start-up state.
? LVS
1
28
GHR
R>100 Ω
HR
HL
R>100 Ω
EXTDR
+ LVS
2
3
27
26
FSR
SHR
C1
Ci
HV
VDD
SU
6
9
10
UBA2033TS
23
21
GLR
PGND
R>100 Ω
LR
IGNITOR
LL
R>100 Ω
C3
Rosc
Cosc
DD
BD
RC
SGND
11
12
13
14
20
17
16
15
GLL
SHL
FSL
GHL
C2
GND
2002 Oct 08
Fig.3 Basic configuration.
10
MBL459
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