UBA2080(2011) 查看數據表（PDF） - NXP Semiconductors.

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UBA2080
(Rev.:2011)

Half-bridge driver IC

NXP Semiconductors. 

NXP Semiconductors

UBA2080/1

Half-bridge driver IC

Table 3.

Symbol

GL

VDD

SEL

Pin description UBA2080AT (SO14) …continued

Pin

Description

11

low-side MOSFET gate

12

IC supply

14

select UBA2080 or UBA2081 functionality

7. Functional description

7.1 Start-up state

The IC enters the start-up state when the supply voltage on pin VDD increases. In the

start-up state, the high-side power transistor is non-conducting and the low-side power

transistor is switched on. The internal circuit is reset and the capacitor on the bootstrap pin

FS is charged. The start-up state is defined until the value of VDD = the VDD(start) value.

After which the IC switches to the oscillation state.

The circuit enters the start-up state again when the voltage on pin VDD VDD(stop).

7.2 UBA2080 oscillation state

In the oscillation state, the output voltage of the GL and GH drivers depend on the logical

signals HIN and LIN, see Table 4

To prevent cross conduction in the half-bridge MOSFETs, the combination HIN = LIN = 1

is not allowed. Both GL and GH are LOW under this condition.

Table 4. logic table

State

HIN

Start-up

-

Oscillation

0

Oscillation

0

Oscillation

1

Oscillation

1

LIN

GL

-

HIGH

0

LOW

1

HIGH

0

LOW

1

LOW

GH

LOW

LOW

LOW

HIGH

LOW

7.3 UBA2081 oscillation state

In the oscillation state, the output voltage of the GL and GH drivers depend on the logical

signals CLK and SD, see Table 5

Table 5. logic table

State

Start-up

Oscillation

Oscillation

Oscillation

Oscillation

CLK

-

0

1

0

1

SD

GL

-

HIGH

0

HIGH

0

LOW

1

LOW

1

LOW

GH

LOW

LOW

HIGH

LOW

LOW

UBA2080_UBA2081

Objective data sheet

All information provided in this document is subject to legal disclaimers.

Rev. 1.1 — 6 December 2011

© NXP B.V. 2011. All rights reserved.

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