UBA2035TS NXP [NXP Semiconductors], UBA2035TS Datasheet - Page 4

• Manufacturer Part Number: UBA2035TS
• Description: HF full bridge control IC for HID lighting
• Manufacturer: NXP [NXP Semiconductors]

NXP Semiconductors
7. Functional description
UBA2035_1
Product data sheet
7.1 Supply voltage
7.2 Start-up
7.3 Oscillation state
Table 2.
The UBA2035 is powered by a supply voltage applied to pin HV, e.g., the supply voltage of
the full bridge. The IC generates its own low supply voltage for its internal circuitry.
Therefore an additional low voltage supply is not required. A capacitor has to be
connected to pin VDD to obtain a ripple-free internal supply voltage. The circuit can also
be powered by a low voltage supply directly applied to pin VDD. In this case pin HV should
be connected to pin VDD or pin SGND. The maximum current that the internal series
regulator can deliver, is temperature dependent. See
With an increasing supply voltage the IC enters the start-up state i.e. the upper power
transistors are set in off-state and the lower power transistors are switched on. During the
start-up state the bootstrap capacitors are charged. The start-up state is defined until
V
is overruled by the bridge disable function.
As soon as the supply voltage on pin VDD exceeds V
pin HV exceeds V
signals on pins CLK, SU, DD and BD. This is listed in
As soon as the supply voltage on pin VDD becomes lower than V
voltage on pin HV becomes lower than V
Symbol
n.c.
GLL
PGND
n.c.
GLR
n.c.
n.c.
SHR
FSR
GHR
VDD
= V
startup(VDD)
Pin description
Pin
UBA2035TS
19
20
21
22
23
24
25
26
27
28
startup(HV)
or V
Rev. 01 — 31 October 2008
HV
…continued
= V
, the output voltage of the full bridge depends on the control
startup(HV)
Description
not connected
gate driver output for lower left MOSFET
power ground
not connected
gate driver output for lower right MOSFET
not connected
not connected
source upper right MOSFET
floating supply right
gate driver upper right MOSFET
. The state of the outputs during the start-up phase
UVLO(HV)
HF Full bridge control IC for HID lighting
, the IC enters the start-up state again.
Figure
startup(VDD)
Table
3.
3.
or the supply voltage on
UVLO(VDD)
UBA2035
© NXP B.V. 2008. All rights reserved.
or the supply
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