L6388E STMicroelectronics, L6388E Datasheet - Page 9

• Manufacturer Part Number: L6388E
• Description: IC DRIVER HI/LO SIDE HV 8-DIP
• Manufacturer: STMicroelectronics
• Type: High Side/Low Sider

Specifications of L6388E

• Configuration: High and Low Side, Synchronous
• Input Type: Non-Inverting
• Delay Time: 225ns
• Current - Peak: 400mA
• Number Of Configurations: 1
• Number Of Outputs: 2
• High Side Voltage - Max (bootstrap): 600V
• Voltage - Supply: 17V
• Operating Temperature: -40°C ~ 125°C
• Mounting Type: Through Hole
• Package / Case: 8-DIP (0.300", 7.62mm)
• Product: Half-Bridge Drivers
• Rise Time: 100 ns
• Fall Time: 80 ns
• Maximum Power Dissipation: 750 mW
• Maximum Operating Temperature: + 125 C
• Mounting Style: Through Hole
• Bridge Type: Half Bridge
• Minimum Operating Temperature: - 45 C
• Number Of Drivers: 2
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Other names: 497-6219-5

L6388E
The following equation is useful to compute the drop on the bootstrap DMOS:
where Q
bootstrap DMOS, and T
For example: using a power MOS with a total gate charge of 30nC the drop on the bootstrap
DMOS is about 1V, if the T
V
is too high, or the circuit topology doesn’t allow a sufficient charging time, an external diode
can be used.
drop
has to be taken into account when the voltage drop on C
gate
is the gate charge of the external power MOS, R
charge
V
drop
charge
is the charging time of the bootstrap capacitor.
=
I
V
is 5µs. In fact:
ch
drop
arg
e
R
=
dson
30nC
-------------- - 125Ω
5µs
→
⋅
V
drop
=
∼
0.8V
------------------ - R
T
Q
ch
gate
arg
e
dson
BOOT
dson
is the on resistance of the
is calculated: if this drop
Bootstrap driver
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