STEVAL-IHM012V1 STMicroelectronics, STEVAL-IHM012V1 Datasheet - Page 8

• Manufacturer Part Number: STEVAL-IHM012V1
• Description: EVAL BRD POWER MOSFET/8PIN MCU
• Manufacturer: STMicroelectronics
• Type: Motor / Motion Controllers & Driversr

Specifications of STEVAL-IHM012V1

• Design Resources: STEVAL-IHM012V1 Gerber Files STEVAL-IHM012V1 Schematic STEVAL-IHM012V1 Bill of Materials
• Main Purpose: Power Management, Motor Control
• Embedded: Yes, MCU, 8-Bit
• Utilized Ic / Part: ST7FLITEUS5
• Primary Attributes: Brush DC Motors
• Secondary Attributes: DC Chopper
• Product: Power Management Modules
• Kit Application Type: Power Management - Motor Control
• Application Sub Type: BLDC Motor
• Kit Contents: Board
• Rohs Compliant: Yes
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• For Use With/related Products: ST7FLiteUS5
• Other names: 497-5861

Application design procedure
4
4.1
8/18
Application design procedure
This evaluation board can be configured for different DC brush motors: 7.2 V - 18 V, here we
have an example of design procedure for 7.2 V DC brush motor. If the user wants to
configure the Evaluation board for other motors, there are the following adjustments to do:
●
●
●
Zener regulator circuit
The power supply is shown in
following equation:
Equation 1
where
Figure 3.
Equation 2
where I
considering that the active on-chip peripherals are working together and thus I
The current to hold the V
In the NiCd and NiMH batteries the cell voltage is 1.2 V and in discharge condition it must be
more than 1 V (to avoid damaging them). We have to assure that the microcontroller is
supplied with 5 V in all conditions and thus we have chosen V
battery.
Zener regulator circuit: R
Sensing resistor: R
Power MOSFET (evaluating the operating junction temperature),
–
–
–
OUT
V
VZD = the voltage drop, V, across the Zener diode, and
R
S
S
is the maximum absorbed current by the microcontroller. We can estimate I
= the resistor.
Zener regulator circuit
= Supply voltage,
SENS
Z
= 5.1 V is I
,
S
Figure
,
I
IN
3. The input current I
zener_MIN
=
I
IN
I
zener MIN
=
V
----------------------- -
S
–
R
–
= 5 mA (see datasheet).
S
V
ZD
+
I
OUT
IN
can be expressed by the
S
= V
Smin
= 88% V
OUT
Nominal
= 8 mA.
UM0291
OUT
of