UBA2033TS PHILIPS [NXP Semiconductors], UBA2033TS Datasheet - Page 6

• Manufacturer Part Number: UBA2033TS
• Description: HF full bridge driver IC
• Manufacturer: PHILIPS [NXP Semiconductors]

Philips Semiconductors
’Dead time’ can be increased by adding a resistor (for
slowly turning on the full bridge power FETs) and a diode
(for quickly turning off the full bridge power FETs) in
parallel, both in series with the gate drivers (see Fig.3).
Divider function
If pin DD = SGND, then the divider function is
enabled/present. If the divider function is present there is
no direct relation between the position of the bridge output
and the status of pin EXTDR.
Start-up delay
Normally, the circuit starts oscillating as soon as pin V
HV reaches the level of release power drive. At this
Table 1 Logic table; note 1
Note
1. X = don’t care
2002 Oct 08
Start-up state
Oscillation state
HF full bridge driver IC
a) BD, SU and DD logic levels are with respect to SGND
b) EXTDR logic levels are with respect to V
c) GHL logic levels are with respect to SHL
d) GHR logic levels are with respect to SHR
e) GLL and GLR logic levels are with respect to PGND
f) If pin DD = LOW the bridge enters the state (oscillation state and pin BD = LOW and pin SU = HIGH) in the
DEVICE
STATUS
pre-defined position pin GHL and pin GLR = HIGH and pin GLL and pin GHR = LOW.
HIGH
HIGH
LOW
LOW
LOW
LOW
BD
HIGH
HIGH
LOW
SU
X
X
X
INPUTS
HIGH
LOW
DD
X
X
X
X
LVS
DD
or
HIGH-to-LOW
LOW-to-HIGH
EXTDR
6
HIGH
HIGH
LOW
LOW
moment the gate drive voltage is equal to the voltage on
pin V
high side transistors. If this voltage is too low for sufficient
drive of the MOSFETs the release of the power drive can
be delayed via pin SU.
A simple RC filter (R between pins V
C between pins SU and SGND) can be used to make a
delay, or a control signal from a processor can be used.
Bridge disable
The bridge disable function can be used to switch off all the
MOSFETs as soon as the voltage on pin BD exceeds the
bridge disable voltage (1.29 V). The bridge disable
function overrules all the other states.
X
X
X
X
DD
for the low side transistors and V
HIGH
HIGH
LOW
LOW
LOW
LOW
LOW
LOW
GHL
HIGH
HIGH
LOW
LOW
LOW
LOW
LOW
LOW
GHR
OUTPUTS
DD
Product specification
HIGH
HIGH
HIGH
HIGH
LOW
LOW
LOW
LOW
GLL
and SU;
DD
UBA2033
0.6 V for the
HIGH
HIGH
HIGH
HIGH
LOW
LOW
LOW
LOW
GLR