UBA2080T データシートの表示（PDF） - NXP Semiconductors.
部品番号
コンポーネント説明
メーカー
UBA2080T Datasheet PDF : 15 Pages
| |||
NXP Semiconductors
UBA2080; UBA2080A; UBA2081
Half-bridge driver IC
Table 3.
Symbol
GH
GL
VDD
SEL
Pin description UBA2080AT (SO14) …continued
Pin
Description
7
high-side MOSFET gate
11
low-side MOSFET gate
12
IC supply
14
select UBA2080 or UBA2081 functionality; only connect to
GND or VDD
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. UBA2080 Logic table
State
HIN
Start-up
-
Oscillation
0
Oscillation
0
Oscillation
1
Oscillation
1
LIN
GH
-
LOW
0
LOW
1
LOW
0
HIGH
1
LOW
GL
HIGH
LOW
HIGH
LOW
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. UBA2081 Logic table
State
CLK
Start-up
-
Oscillation
0
Oscillation
1
Oscillation
0
Oscillation
1
SD
GH
-
LOW
0
LOW
0
HIGH
1
LOW
1
LOW
GL
HIGH
HIGH
LOW
LOW
LOW
UBA2080_UBA2081
Product data sheet
All information provided in this document is subject to legal disclaimers.
Rev. 3 — 18 June 2012
© NXP B.V. 2012. All rights reserved.
4 of 15
Share Link: 