TWR-MC-LV3PH Freescale Semiconductor, TWR-MC-LV3PH Datasheet - Page 5

• 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

3.3 Three Phase Field Effect Transistor Pre-driver
The TWR-MC-LV3PH module uses the Freescale MC33937A Three Phase Field Effect Transistor Pre-driver. The 33937 is a
Field Effect Transistor (FET) pre-driver designed for three phase motor control and similar applications. The integrated
circuit (IC) uses SMARTMOS
drivers. Three external bootstrap capacitors provide gate charge to the High Side FETs. The IC interfaces to a MCU via six
direct input control signals, an SPI port for device setup and asynchronous reset, enable and interrupt signals.
Features:
3.4 SPI Communication
Freescale MC33937A driver uses SPI communication for operating parameter, mode, and interrupt settings. Driver command
and registers are described in a driver manual. The selection between two Chip Select signals is available on the board via
two 0-ohm resistors R95 and R96 (see
3.5 3-Phase Bridge
The output stage is configured as a 3-phase bridge with MOSFET-output transistors. It is simplified considerably by an
integrated-gate driver that has an over-current, under voltage and other safety features.
Freescale Semiconductor, Inc.
Logic 1 Input Voltage
Logic 0 Input Voltage
Input Resistance
Analogue Output Range
Bus Current Sense Voltage
Bus Current Sense Offset
Bus Voltage Sense Voltage*
Bus Voltage Sense Offset
Bus Continuous Output Current **
Total Power Dissipation (per MOSFET) ***
Dead-time (set by SW MC33937) ****
• Fully specified from 8.0 V to 40 V covers 12 V and 24 V automotive systems
• Extended operating range from 6.0 V to 58 V covers 12 V and 42 V systems
• Greater than 1.0 A gate drive capability with protection
• Protection against reverse charge injection from CGD and CGS of external FETs
• Includes a charge pump to support full FET drive at low battery voltages
• Dead time is programmable via the SPI port
• Simultaneous output capability enabled via safe SPI command
• Supports very high current loads
Characteristic
Table 1. Electrical characteristics (continued)
™
technology and contains three High Side FET pre-drivers and three Low Side FET pre-
TWR-MC-LV3PH User’s Guide, Rev. 1, 07/2012
Zero-Ohm
Resistors).
Symbol
V
I
I
V
V
Sense
offset
V
V
R
offset
P
t
I
Bus
off
Out
C
IH
IL
In
D
Min
1.5
0.9
—
—
—
—
—
0
0
+1.65
412
Typ
10
91
—
—
—
—
—
—
0
TBD
Max
1.7
3.3
15
—
—
—
1
8
Hardware Features
mV/A
mV/V
Units
W
us
V
V
V
V
V
A
k
5