STEVAL-IHM021V1 STMicroelectronics, STEVAL-IHM021V1 Datasheet - Page 18

• Manufacturer Part Number: STEVAL-IHM021V1
• Description: BOARD EVAL L6390/STD5NK52ZD
• Manufacturer: STMicroelectronics
• Type: Motor / Motion Controllers & Driversr

Specifications of STEVAL-IHM021V1

• Main Purpose: Power Management, Motor Control
• Embedded: Yes, MCU, 32-Bit
• Utilized Ic / Part: L6390, STD5NK52ZD-1
• Primary Attributes: 3-Ph PMSM, 100 W 3-Phase Inverter, 110 ~ 230VAC
• Secondary Attributes: Field-Oriented Control (FOC) of Sinusoidal-Shaped Back-EMF
• Input Voltage: 110 V to 230 V
• Product: Power Management Modules
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• For Use With/related Products: L6390, STD5NK52ZD-1
• Other names: 497-8404

Bootstrap driver
18/22
Equation 3
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 1 V, if the T
Equation 4
V
is too high, or the circuit topology doesn’t allow a sufficient charging time, an external diode
can be used.
Figure 8.
drop
V
CC
has to be taken into account when the voltage drop on C
gate
D
is the gate charge of the external power MOS, R
Bootstrap driver
BOOT
a
V
HVG
LVG
drop
charge
=
charge
I
V
BOOT
OUT
is the charging time of the bootstrap capacitor.
ch
Doc ID 14493 Rev 5
drop
arg
H.V.
is 5 μs. In fact:
e
R
=
dson
C
TO LOAD
BOOT
30nC
-------------- - 120Ω
5μs
→
V
⋅
V
CC
drop
=
∼
------------------ R
T
0.7V
Q
ch
b
dson
gate
HVG
LVG
BOOT
arg
e
is the on resistance of the
is calculated: if this drop
dson
BOOT
OUT
H.V.
D99IN1067
C
TO LOAD
BOOT
L6390