MC33395T View Datasheet(PDF) - Freescale Semiconductor
Part Name
Description
Manufacturer
MC33395T Datasheet PDF : 16 Pages
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FUNCTIONAL DESCRIPTION
INTRODUCTION
FUNCTIONAL DESCRIPTION
INTRODUCTION
The 33395 and 33395T devices are designed to provide
the necessary drive and control signal buffering and
amplification to enable a DSP or MCU to control a three-
phase array of power MOSFETs such as would be required
to energize the windings of powerful brushless DC (BLDC)
motors. It contains built-in charge pump circuitry so that the
MOSFET array may consist entirely of N-Channel
MOSFETs. It also contains feedback sensing circuitry and
control circuitry to provide a robust overall motor control
design.
FUNCTIONAL PIN DESCRIPTION
CHARGE PUMP CAPACITOR (CP2H)
High potential pin connection for secondary charge pump
capacitor
CHARGE PUMP RESERVE CAPACITOR (CPRES)
Input from external reservoir capacitor for charge pump
INPUT VOLTAGE (VIGN)
Input from ignition level supply voltage for power functions
HIGH-SIDE GATE VOLTAGE (VGDH)
Output full-time gate drive for auxiliary high-side power
MOSFET switch
INPUT VOLTAGE PROTECTED (VIGNP)
Input from protected ignition level supply for power
functions
HIGH-SIDE SENSE (SRC1, SRC2, SRC3)
Sense for high-side source voltage, phase 1/2/3
GATE DRIVE HIGH (GDH1, GDH2, GDH3)
Output for gate high-side, phase 1/2/3
OUTPUT FOR GATE (GDL1, GDL2, GDL3)
Output for gate drive low-side, phase 1
POWER GROUND (PGND)
Ground pins for power functions
TEST PIN (TEST)
This should be connected to ground or left open
IS MINUS (-ISENS)
Inverting input for current limit comparator
IS PLUS (+ISENS)
Non-Inverting input for current limit comparator
ANALOG GROUND (AGND)
Ground pin for logic functions
LOGIC SUPPLY VOLTAGE (VDD)
Supply voltage for logic functions
PULSE WIDTH MODULATOR (PWM)
Input for pulse width modulated driver duty cycle
MODE CONTROL BIT 1 (MODE1)
Input for mode control selection
MODE CONTROL BIT 0 (MODE0)
Input for mode control selection
HIGH-SIDE ENABLE (HSE3, HSE2, HSE1)
Input for high-side enable logic, phase 1/2/3
LOW-SIDE ENABLE (LSE3, LSE2, LSE1)
Input for low-side enable logic, phase 1/2/3
EXTERNAL PUMP CAPACITOR (CP1L, CP1H)
Input from external pump capacitor for charge pump and
secondary pins
CHARGE PUMP CAPACITOR (CP2L)
Input from external reservoir, external pump capacitors for
charge pump, and secondary pins
Analog Integrated Circuit Device Data
Freescale Semiconductor
33395
9
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