L6599A STMicroelectronics, L6599A Datasheet - Page 31

• Manufacturer Part Number: L6599A
• Description: IMPROVED HIGH-VOLTAGE RESONANT CONTROLLER
• Manufacturer: STMicroelectronics

Specifications of L6599A

• Two-level Ocp: frequency-shift and latched shutdown

L6599A
Equation 13
where Qg is the gate charge of the external power MOS, R
bootstrap DMOS (150 W, typ.) and T
equals about half the switching period minus the dead time T
MOSFET with a total gate charge of 30nC, the drop on the bootstrap driver is about 3 V at a
switching frequency of 200 kHz:
Equation 14
If a significant drop on the bootstrap driver is an issue, an external ultra-fast diode can be
used, thus saving the drop on the R
V
V
Drop
Drop
=
=
I
2
Doc ID 15308 Rev 5
ch
5 .
arg
⋅
10
e
R
(DS)ON
charge
30
−
(
DS
6
⋅
−
)
10
on
. 0
is the ON-time of the bootstrap driver, which
of the internal DMOS.
−
+
27
9
V
⋅
F
10
=
−
T
6
ch
150
Q
arg
g
e
+
R
0
(DS)ON
(
6 .
DS
D
=
)
. For example, using a
on
2
+
7 .
is the on-resistance of the
Application information
V
V
F
31/36