INTEGRATED CIRCUITS
DATA SHEET
UBA2032
Full bridge driver IC
Preliminary specification
2002 Oct 07
Philips Semiconductors
Preliminary specification
Full bridge driver IC
FEATURES
•
Full bridge driver circuit
•
Integrated bootstrap diodes
•
Integrated high voltage level shift function
•
High voltage input for the internal supply voltage
•
550 V maximum bridge voltage
•
Bridge disa‘ble function
•
Input for start-up delay
•
Adjustable oscillator frequency
•
Predefined bridge position during start-up
•
Adaptive non-overlap.
APPLICATIONS
•
The UBA2032 can drive (via the MOSFETs) any kind of
load in a full bridge configuration
•
The circuit is especially designed as a commutator for
High Intensity Discharge (HID) lamps.
ORDERING INFORMATION
TYPE
NUMBER
UBA2032T
UBA2032TS
PACKAGE
NAME
SO24
SSOP28
DESCRIPTION
plastic small outline package; 24 leads; body width 7.5 mm
plastic shrink small outline package; 28 leads; body width 5.3 mm
GENERAL DESCRIPTION
UBA2032
The UBA2032 is a high voltage monolithic integrated
circuit made in the EZ-HV SOI process. The circuit is
designed for driving the MOSFETs in a full bridge
configuration. In addition, it features a disable function, an
internal adjustable oscillator and an external drive function
with a high-voltage level shifter for driving the bridge.
To guarantee an accurate 50% duty factor, the oscillator
signal can be passed through a divider before being fed to
the output drivers.
VERSION
SOT137-1
SOT341-1
2002 Oct 07
2
Philips Semiconductors
Preliminary specification
Full bridge driver IC
BLOCK DIAGRAM
UBA2032
handbook, full pagewidth
−LVS
1 (1)
EXTDR
2 (2)
+LVS
3 (3)
14 (16)
FSL
GHL
SHL
FSR
LOGIC SIGNAL
GENERATOR
HIGH VOLTAGE
LEVEL SHIFTER
HIGHER RIGHT
DRIVER
24 (28)
22 (26)
LOWER RIGHT
DRIVER
20 (23)
18 (21)
GHR
SHR
GLR
PGND
5 (6)
HV
HIGHER LEFT
DRIVER
13 (15)
15 (17)
SGND
12 (14)
STABILIZER
UVLO
23 (27)
7 (9)
VDD
11 (13)
RC
OSCILLATOR
2
8 (10)
UBA2032T
UBA2032TS
SU
10 (12)
BD
1.29 V
bridge disable
9 (11)
DD
LOGIC
LOW VOLTAGE
LEVEL SHIFTER
LOWER LEFT
DRIVER
17 (20)
GLL
4, 6, 16, 19, 21
(4, 5, 7, 8, 18, 19, 22, 24, 25)
n.c.
MGU542
Pin numbers refer to the UBA2032T.
Pin numbers in brackets refer to the UBA2032TS.
Fig.1 Block diagram.
2002 Oct 07
3
Philips Semiconductors
Preliminary specification
Full bridge driver IC
PINNING
PIN
SYMBOL
UBA2032T
−LVS
EXTDR
+LVS
n.c.
n.c.
HV
n.c.
n.c.
V
DD
SU
DD
BD
RC
SGND
GHL
FSL
SHL
n.c.
n.c.
GLL
PGND
n.c.
GLR
n.c.
n.c.
SHR
FSR
GHR
1
2
3
4
−
5
6
−
7
8
9
10
11
12
13
14
15
16
−
17
18
19
20
21
−
22
23
24
UBA2032TS
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
negative supply voltage (for logic input)
oscillator signal input
positive supply voltage (for logic input)
not connected
not connected
high voltage supply input
not connected
not connected
internal low voltage supply
input signal for start-up delay
divider disable input
bridge disable control input
RC input for internal oscillator
signal ground
gate of higher left MOSFET
floating supply voltage left
source of higher left MOSFET
not connected
not connected
gate of lower left MOSFET
power ground
not connected
gate of lower right MOSFET
not connected
not connected
source of higher right MOSFET
floating supply voltage right
gate of higher right MOSFET
DESCRIPTION
UBA2032
2002 Oct 07
4
Philips Semiconductors
Preliminary specification
Full bridge driver IC
UBA2032
handbook, halfpage
−LVS
1
EXTDR
+LVS
n.c.
HV
n.c.
VDD
SU
DD
2
3
4
5
6
handbook, halfpage
24 GHR
23 FSR
22 SHR
21 n.c.
20 GLR
19 n.c.
−LVS
1
EXTDR 2
+LVS
3
28 GHR
27 FSR
26 SHR
25 n.c.
24 n.c.
23 GLR
22 n.c.
n.c. 4
n.c. 5
HV 6
n.c. 7
UBA2032T
7
8
9
18 PGND
17 GLL
16 n.c.
15 SHL
14 FSL
13 GHL
MGU543
UBA2032TS
n.c. 8
VDD 9
SU 10
DD 11
BD 12
RC 13
SGND 14
MGU544
21 PGND
20 GLL
19 n.c.
18 n.c.
17 SHL
16 FSL
15 GHL
BD 10
RC 11
SGND 12
Fig.2 Pin configuration (SO24).
Fig.3 Pin configuration (SSOP28).
FUNCTIONAL DESCRIPTION
Supply voltage
The UBA2032 is powered by a supply voltage applied to
pin HV, for instance the supply voltage of the full bridge.
The IC generates its own low supply voltage for the
internal circuitry. Therefore an additional low voltage
supply is not required. A capacitor has to be connected to
pin V
DD
to obtain a ripple-free internal supply voltage. The
circuit can also be powered by a low voltage supply directly
applied to pin V
DD
. In this case pin HV should be
connected to pin V
DD
or SGND.
Start-up
With an increasing supply voltage the IC enters the
start-up state; the higher power transistors are kept off and
the lower power transistors are switched on. During the
start-up state the bootstrap capacitors are charged and the
bridge output current is zero. The start-up state is defined
until V
DD
= V
DD(UVLO)
, where UVLO stands for Under
Voltage Lock-out. The state of the outputs during the
start-up phase is overruled by the bridge disable function.
Release of the power drive
At the moment the supply voltage on pin V
DD
or HV
exceeds the level of release power drive the output voltage
of the bridge depends on the control signal on pin EXTDR
see Table 1. The bridge position after start-up, disable, or
delayed start-up (via pin SU) depends on the status of the
pins DD and EXTDR. If pin DD = LOW (divider enabled)
the bridge will start in the pre-defined position pin GLR
and pin GHL = HIGH and pin GLL and pin GHR = LOW.
If pin DD = HIGH (divider disabled) the bridge position will
depend on the status of pin EXTDR.
If the supply voltage on pin V
DD
or HV decreases and
drops below the reset level of power drive the IC enters the
start-up state again.
Oscillation
At the point where the supply voltage on pin HV crosses
the level of release power drive, the bridge begins
commutating between the following two defined states:
•
Higher left and lower right MOSFETs on,
higher right and lower left MOSFETs off
•
Higher left and lower right MOSFETs off,
higher right and lower left MOSFETs on.
2002 Oct 07
5
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