TWR-MC-LV3PH Freescale Semiconductor, TWR-MC-LV3PH Datasheet - Page 4

• Manufacturer Part Number: TWR-MC-LV3PH
• Description: Power Management IC Development Tools Low-volt 3-phase MC
• Manufacturer: Freescale Semiconductor
• Type: Motor / Motion Controllers & Driversr

Specifications of TWR-MC-LV3PH

• Rohs: yes
• Product: Tower Systems
• Tool Is For Evaluation Of: MC33937A
• Input Voltage: 12 V to 24 V
• Output Voltage: 3.3 V, 5 V
• Description/function: Part of the Tower Systems
• Dimensions: 3.54 in x 3.18 in
• Interface Type: SPI
• Output Current: 8 A

Hardware Features
3.1 Power Supply
Freescale’s 3-phase Low Voltage Motor Control Tower Module is a 3-phase power stage that will operate off DC input
voltages of 12 to 24 V, 8 A. The module contains reverse polarity protection circuitry.
TWR-MC-LV3PH is intended to be powered from an external power supply of 12 to 24 V, 4 to 8 A depending on the motor
used. The module includes 5.0 V and 3.3 V supplies which are capable of providing power to the entire Tower System.
3.1.1 +5V Power Supply
The +5V level is generated by means of the LM2594HVM switching step-down regulator, which generates this level from
bus voltage. This converter can supply up to 500 mA. This voltage level serves the MC33269D linear regulator, encoder, and
optionally the entire tower system. If the LM2594HVM converter operates properly, the D7 green LED is lit.
3.1.2 +3.3V Power Supply
An important voltage level for this board is +3.3V. This voltage level is obtained from the MC33269D linear voltage
regulator and can supply up to 800 mA.
3.1.3 +1.65V Voltage Reference
Current sensing operational amplifiers use 1.65V level connected to non-inverted inputs. This level is obtained from a
precision voltage reference LM4041 (D6).
3.1.4 Analog Power Supply and Grounding
Separated analog voltage 3.3V and ground are used for analog quantities sensing (currents and voltages). This voltage level
can be chosen from two sources: one separated from 3.3V digital power supply using an LC filter or a second from the
primary elevator port. Source selection is done via jumpers J2 and J3.
3.2 Electrical Characteristics
The electrical characteristics in
maximal value can be higher than 24 V. A 50 V maximal input voltage value is allowed, but the divider resistors in the DC
bus and BEMF sensing circuits need to be modified to increase sensing range up to 50 V. This prevents scaled quantities
exceeding the maximally allowed input voltage value on the controller input pins.
4
DC Input Voltage
Quiescent Current
If an input voltage higher than 24 V is applied, the plugged TWR modules might be
damaged.
Characteristic
Table 1
TWR-MC-LV3PH User’s Guide, Rev. 1, 07/2012
Table 1. Electrical characteristics
apply to operations at 25°C with a 24 VDC power-supply voltage. Input voltage
Table continues on the next page...
CAUTION
Symbol
V
I
CC
dc
Min
12
—
TBD
Typ
—
Freescale Semiconductor, Inc.
Max
24
—
Units
mA
V