UBA2032 查看數據表（PDF） - Philips Electronics

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UBA2032

Full bridge driver IC

Philips Electronics 

Philips Semiconductors

Full bridge driver IC

Preliminary specification

UBA2032

handbook, halfpage

−LVS 1

24 GHR

EXTDR 2

23 FSR

+LVS 3

22 SHR

n.c. 4

21 n.c.

HV 5

20 GLR

n.c. 6

19 n.c.

UBA2032T

VDD 7

18 PGND

SU 8

17 GLL

DD 9

16 n.c.

BD 10

15 SHL

RC 11

14 FSL

SGND 12

13 GHL

MGU543

Fig.2 Pin configuration (SO24).

handbook, halfpage

−LVS 1

28 GHR

EXTDR 2

27 FSR

+LVS 3

26 SHR

n.c. 4

25 n.c.

n.c. 5

24 n.c.

HV 6

23 GLR

n.c. 7

22 n.c.

UBA2032TS

n.c. 8

21 PGND

VDD 9

SU 10

20 GLL

19 n.c.

DD 11

18 n.c.

BD 12

17 SHL

RC 13

16 FSL

SGND 14

15 GHL

MGU544

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 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 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 VDD = VDD(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 VDD 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 VDD 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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