KIT33932VWEVBE Freescale Semiconductor, KIT33932VWEVBE Datasheet - Page 12

• Manufacturer Part Number: KIT33932VWEVBE
• Description: KIT EVALUATION FOR MC33932
• Manufacturer: Freescale Semiconductor
• Type: MOSFET & Power Driverr

Specifications of KIT33932VWEVBE

• Main Purpose: Power Management, Motor Control
• Embedded: No
• Utilized Ic / Part: MC33932
• Primary Attributes: 1 H-Bridge Driver
• Secondary Attributes: USB, I2C, SPI Interface
• Interface Type: USB, SPI
• Product: Power Management Modules
• Silicon Manufacturer: Freescale
• Silicon Core Number: MC33932
• Kit Application Type: Power Management
• Application Sub Type: Switch
• Kit Contents: Evaluation Board, CD, Misc Cables
• Rohs Compliant: Yes
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• For Use With/related Products: MC33932

ENABLE INPUT/DISABLE INPUT 2 (EN/D2
when it goes to a logic LOW the outputs are immediately tri-
stated. It is also used to place the device in a Sleep Mode so
as to consume very low currents. When the EN/D2 pin
voltage is a logic LOW state, the device is in the Sleep Mode.
The device is enabled and fully operational when the EN pin
voltage is logic HIGH. An internal pull-down resistor
maintains the device in Sleep Mode in the event EN is driven
through a high-impedance I/O or an unpowered
microcontroller, or the EN/D2 input becomes disconnected.
FEEDBACK (FB)
monitoring of H-bridge high-side output currents to facilitate
closed-loop operation for motor speed and torque control.
12
33932
FUNCTIONAL DESCRIPTION
FUNCTIONAL PIN DESCRIPTION
The EN/D2 pin performs the same function as D1 pin,
The 33932 has a feedback output (FB) for “real time”
)
)
H-bridge high side drivers. When running in the forward or
reverse direction, a ground-referenced 0.24% of load current
is output to this pin. Through the use of an external resistor to
ground, the proportional feedback current can be converted
to a proportional voltage equivalent and the controlling
microcontroller can “read” the current proportional voltage
with its analog-to-digital converter (ADC). This is intended to
provide the user with only first-order motor current feedback
for motor torque control. The resistance range for the linear
operation of the FB pin is 100 Ω < R
(only D1), a small filter capacitor (~1.0 µF) may be required
in parallel with the R
suppression.
The FB pin provides current sensing feedback of the
If PWM-ing is implemented using the disable pin input
FB
Analog Integrated Circuit Device Data
resistor to ground for spike
Freescale Semiconductor
FB
< 300 Ω
.