L6699D STMicroelectronics, L6699D Datasheet - Page 16

• Manufacturer Part Number: L6699D
• Description: AC/DC Switching Converters Enhanced High Volt Res CTRL 600V
• Manufacturer: STMicroelectronics
• Type: High Voltage Controllersr

Specifications of L6699D

• Product Category: AC/DC Switching Converters
• Output Voltage: 13.3 V
• Input / Supply Voltage (max): 8.85 V
• Input / Supply Voltage (min): 16 V
• Switching Frequency: 235 kHz
• Supply Current: 3 mA
• Operating Temperature Range: - 25 C to + 125 C
• Mounting Style: SMD/SMT
• Package / Case: SO-16
• Number Of Outputs: 1
• Output Current: 800 mA

Application information
16/38
Note that the “Driving logic…” block sets a minimum deadtime T
which T
switch, and also a maximum deadtime T
bridge. T
whichever is shorter.
Figure 9.
The actual deadtime T
adjustment circuit of
image shown in
It illustrates a detailed view of the low-to-high transition of the half bridge midpoint
(waveform labeled HB) along with the high-side gate-drive (HVG), the low-side gate-drive
(LVG) and the oscillator voltage on pin CF (OSC). Obviously, the information that follows
applies to the high-to-low transition as well.
Figure 7.
D
D_MAX
cannot go, to prevent simultaneous conduction of the high-side and the low-side
Detailed view of deadtime during low-to-high transition of half bridge
midpoint
Adaptive deadtime: principle
schematic
is internally set at either 700 ns or one fourth of the oscillator cycle,
Figure 9
Figure 7
D
that can be observed during operation does not depend only on the
.
. This fact can be explained with the aid of the oscilloscope
Doc ID 022835 Rev 2
D_MAX
Figure 8.
to guarantee proper operation of the half
Relevant timing diagrams
D_MIN
(≈ 230 ns) below
L6699