Philips uba2030t DATASHEETS

INTEGRATED CIRCUITS

DATA SH EET

UBA2030T

Full bridge driver IC

Preliminary speciﬁcation Supersedes data of 1997 Sep 16 File under Integrated Circuits, IC11

1999 Aug 10

Philips Semiconductors Preliminary speciﬁcation

Full bridge driver IC UBA2030T

FEATURES

• Full bridge driver

• Integrated bootstrap diodes

• Integrated high voltage level shift function

• High voltage input (570 V maximum) for the internal

supply

• Adjustable ‘dead time’

• Adjustable oscillator frequency

• High voltage level shifter for the bridge enable function

• Shut-down function.

APPLICATIONS

• The UBA2030T can drive the MOSFETs in any type of load configured as a full bridge

• The circuit is intended as a commutator for High Intensity Discharge (HID) lamps.

ORDERING INFORMATION

TYPE NUMBER

NAME DESCRIPTION VERSION

UBA2030T SO24 plastic small outline package; 24 leads; body width 7.5 mm SOT137-1

GENERAL DESCRIPTION

The UBA2030T is a high voltage integrated circuit fabricated using the BCD750 power logic process. The circuit is designed for driving the MOSFETs in a full bridge configuration. In addition, it features a shut-down function,anadjustableoscillatorandaPMOShighvoltage level shifter to control the bridge enable function. To guarantee an accurate 50% duty factor, the oscillator signal passes through a divider before being fed to the output drivers.

PACKAGE

1999 Aug 10 2

Philips Semiconductors Preliminary speciﬁcation

Full bridge driver IC UBA2030T

QUICK REFERENCE DATA

SYMBOL PARAMETER CONDITIONS MIN. TYP. MAX. UNIT High voltage

Start-up; powered via pin HV

strtu

th(osc strt)

th(osc stp)

Output drivers

o(source)

o(sink)

Internal oscillator

bridge

External oscillator

osc(ext)

high voltage supply 0 − 570 V

start-up current − 0.7 1.0 mA start oscillating threshold

at f

= 500 Hz; no load 14.0 15.5 17.0 V

bridge

voltage stop oscillating threshold voltage 11.5 13.0 14.5 V

output source current VDD=V

GHR=VGHL=VGLR=VGLL

output sink current VDD=V

GHR=VGHL=VGLR=VGLL

FSL=VFSR

=15V;

140 190 240 mA

=0V

200 260 320 mA

=15V

bridge oscillating frequency EXO pin connected to SGND 50 − 50000 Hz

external oscillator frequency RC pin connected to SGND; 100 − 100000 Hz

osc(ext)

----------------2

bridge

Dead time control

dead

dead time control range (adjusted externally)

Bridge enable

HIGH-level input current bridge enable active 100 − 700 µA LOW-level input current bridge enable not active 0 − 20 µA

Shut-down

HIGH-level input voltage

LOW-level input voltage shut-down not active; 0 − 0.5 V

shut-down active;

∆V

--------------

5 V/ms>

∆t

∆ V

-------------∆t

0.4 − 4 µs

5 V/ms>

4.5 − V

1999 Aug 10 3

Philips Semiconductors Preliminary speciﬁcation

Full bridge driver IC UBA2030T

BLOCK DIAGRAM

handbook, full pagewidth

HV BER BE

LOW VOLTAGE

SUPPLY

24 23 5 20 22

SGND VDDRC EXO DTC

BRIDGE ENABLE

OSCILLATOR

÷ 2

LOGIC

Fig.1 Block diagram.

HIGH VOLTAGE LEVEL SHIFTER

UBA2030T

LOW VOLTAGE

LEVEL SHIFTER

HIGHER LEFT

HIGHER RIGHT

LOWER LEFT

LOWER RIGHT

4, 6, 9, 16, 17, 19

n.c.

DRIVER

12 15

MGK590

FSL

GHL

SHL FSR

GHR

SHR

GLL

PGND

GLR

1999 Aug 10 4

Philips Semiconductors Preliminary speciﬁcation

Full bridge driver IC UBA2030T

PINNING

SYMBOL PIN DESCRIPTION

GLR 1 gate of lower right MOSFET PGND 2 power ground for sources of lower

left and right MOSFETs GLL 3 gate of lower left MOSFET n.c. 4 not connected RC 5 RC input for internal oscillator n.c. 6 not connected BE 7 bridge enable control input BER 8 bridge enable reference input n.c. 9 not connected FSL 10 ﬂoating supply voltage left output GHL 11 gate of higher left MOSFET SHL 12 source of higher left MOSFET SHR 13 source of higher right MOSFET GHR 14 gate of higher right MOSFET FSR 15 ﬂoating supply voltage right output n.c. 16 not connected n.c. 17 not connected HV 18 high voltage supply input n.c. 19 not connected EXO 20 external oscillator input SD 21 shut-down input DTC 22 ‘dead time’ control input V

23 internal (low voltage) supply

SGND 24 signal ground

handbook, halfpage

GLR

PGND

GLL

n.c.

UBA2030T

7 8

BER

n.c.

FSL

GHL

SHL

MGK589

Fig.2 Pin configuration.

SGND

DTC

EXO

20 19

n.c. HV

18 17

n.c. n.c.

FSR

GHR

SHR

1999 Aug 10 5

Philips Semiconductors Preliminary speciﬁcation

Full bridge driver IC UBA2030T

FUNCTIONAL DESCRIPTION Supply voltage

The UBA2030T is powered by a single supply voltage connected to the HV pin (the full bridge supply could be used, for example). The IC generates its own low voltage supply for driving the internal circuitry and the MOSFETs in the full bridge, removing the need for an additional low voltage supply. A capacitor must be connected between the VDDpin and SGND to obtain a ripple-free internal supply voltage.

Start-up

When the power is turned on, the UBA2030T enters a start-up phase; the high side MOSFETs are switched off and the low side MOSFETs switched on. During start-up, thebootstrapcapacitorsarecharged and the bridgeoutput current is zero.

Oscillation

Atthepointwherethe supply voltage at theHV pincrosses the ‘start oscillating threshold’, 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.

When the internal oscillator is used, the bridge commutating frequency is determined by the values of an external resistor and capacitor. In this mode, the EXO pin must be connected to SGND.

When an external oscillator is used, its output must be connected to the EXO pin; the internal oscillator must be disabled by connecting the RC pin to SGND. The bridge commutatingfrequency is half the oscillator frequency due to a ÷2 circuit which guarantees an accurate 50% duty factor.

The time between turning off the conducting pair of MOSFETs and turning on the other pair, the ‘dead time’, can be adjusted using an external resistor. If the supply voltage at the HV pin falls below the ‘stop oscillating threshold’, the UBA2030T re-enters the start-up phase.

Bridge enable

The bridge enable function allows the bridge to be held in its current state. When active, it connects the RC pin to SGND,disablingtheinternaloscillator.Ifthebridge enable function is activated during ‘dead time’, the bridge is allowed to enter the next conducting state before being held. Oscillations resume the instant the bridge enable function is turned off. A timing diagram is shown in Fig.3.

To hold the bridge, an external control circuit is required to provide a source current to the bridge enable control input (pin BE), and to supply a reference voltage to pin BER, (see Fig.6).

Shut-down

The active HIGH shut-down input (pin SD) can be used at any time to turn off all four MOSFETs. However, if the supply voltage drops below the ‘stop oscillating threshold’, the bridge re-enters the start-up phase even if the shut-down function is active.

1999 Aug 10 6

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