uba2080 NXP Semiconductors, uba2080 Datasheet - Page 4

• Manufacturer Part Number: uba2080
• Description: Half-bridge Driver Ic
• Manufacturer: NXP Semiconductors

NXP Semiconductors
7. Functional description
UBA2080_UBA2081
Objective data sheet
7.1 Start-up state
7.2 UBA2080 oscillation state
7.3
Table 3.
The IC enters the start-up state when the supply voltage on pin V
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 V
After which the IC switches to the oscillation state.
The circuit enters the start-up state again when the voltage on pin V
In the oscillation state, the output voltage of the GL and GH drivers depend on the logical
signals HIN and LIN, see
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.
In the oscillation state, the output voltage of the GL and GH drivers depend on the logical
signals CLK and SD, see
Table 5.
Symbol
GL
V
SEL
State
Start-up
Oscillation
Oscillation
Oscillation
Oscillation
State
Start-up
Oscillation
Oscillation
Oscillation
Oscillation
UBA2081 oscillation state
DD
Pin description UBA2080AT (SO14)
logic table
logic table
Pin
11
12
14
All information provided in this document is subject to legal disclaimers.
Rev. 1.1 — 6 December 2011
Table 4
Table 5
1
1
HIN
-
0
0
1
CLK
-
0
0
1
Description
low-side MOSFET gate
IC supply
select UBA2080 or UBA2081 functionality
…continued
LIN
-
0
1
0
1
SD
-
0
0
1
1
GL
HIGH
LOW
HIGH
LOW
LOW
GL
HIGH
HIGH
LOW
LOW
LOW
DD
DD
= the V
UBA2080/1
Half-bridge driver IC
DD
increases. In the
V
© NXP B.V. 2011. All rights reserved.
DD(start)
DD(stop)
GH
LOW
LOW
LOW
HIGH
LOW
GH
LOW
LOW
HIGH
LOW
LOW
value.
.
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