MC34929EP Freescale Semiconductor, MC34929EP Datasheet - Page 13

• Manufacturer Part Number: MC34929EP
• Description: IC MOTOR DRIVER BLDC 1A 24-QFN
• Manufacturer: Freescale Semiconductor
• Type: Brushless DC Motor Controllerr

Specifications of MC34929EP

• Applications: DC Motor Driver, Brushless (BLDC), 3 Phase
• Number Of Outputs: 1
• Current - Output: 1A
• Voltage - Supply: 8 V ~ 28 V
• Operating Temperature: 0°C ~ 85°C
• Mounting Type: Surface Mount
• Package / Case: 24-QFN
• Operating Supply Voltage: 12 V
• Supply Current: 6 mA
• Mounting Style: SMD/SMT
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Voltage - Load: -
• Lead Free Status / Rohs Status: Lead free / RoHS Compliant

BLDC motor driver system in one chip. It is designed to
efficiently drive three-phase BLDC motors up to 1.0 A and
28 V, and has built in protection features making it ideal for a
variety of consumer and office applications containing small
motors. Because it has a built-in Hall-sensors interface and
HAL CA NEG (HCA-)
and ‘a’ phases.
HAL CA POS (HCA+)
and ‘a’ phases.
HAL BC NEG (HBC-)
and ‘c’ phases.
HAL BC POS (HBC+)
and ‘c’ phases.
HAL AB NEG (HAB-)
and ‘b’ phases.
HAL AB POS (HAB+)
and ‘b’ phases.
RESERVOIR CAP (CRES)
CHARGE PUMP POS (CP+)
CHARGE PUMP NEG (CP-)
POSITIVE SUPPLY (V+)
SIGNAL GROUND (GND)
Analog Integrated Circuit Device Data
Freescale Semiconductor
The MC34929 Brushless DC Motor Driver IC is a complete
Receives negative output from sensor located between ‘c’
Receives positive output from sensor located between ‘c’
Receives negative output from sensor located between ‘b’
Receives positive output from sensor located between ‘b’
Receives negative output from sensor located between ‘a’
Receives positive output from sensor located between ‘a’
External charge pump resevoir cap.
Positive side of charge pumping cap.
Negative side of charge pumping cap.
Main supply input for device and monitor.
Signal ground for the device.
FUNCTIONAL DESCRIPTION
FUNCTIONAL PIN DESCRIPTION
INTRODUCTION
Hall sensors bias supply, it can operate motors either stand-
alone (e.g., with pushbutton/switch interface), or under the
control of an external MCU. Its sophisticated analog/mixed-
signal state machine accommodates several modes of
operation, including: clockwise, counterclockwise, run/stop,
brake, variable speed (PWM), and torque limit (current limit).
TIMING CAP (CT)
HALL VOLTAGE (VH)
PHASE C OUTPUT (PHC)
PHASE A OUTPUT (PHC)
LOW SIDE SOURCES (LSS)
PHASE B OUTPUT (PHB)
CURRENT SENSE (ISENS)
RUN (RUN)
TACH OUTPUT (TACH)
3X TACH OUTPUT (3XTACH)
DIRECTION (DIR)
POWER GROUND (PGND)
PWM OR ENABLE (PWM)
Current limiting sense resistor input.
Run/stop control input (active low = motor running).
Open-drain-buffered output of sensor ‘ab’.
Open-drain-buffered, exor’ed output of all three sensors.
Direction control input (active low = cw rotation).
Power ground.
Pwm signal input (active low = outputs enabled).
External cap for stall detect timing.
Supply voltage for the external hall sensors.
Half bridge output for phase “c” motor winding.
Half bridge output for phase “a” motor winding.
Common source pin for lower half of bridge.
Half bridge output for phase “b” motor winding.
FUNCTIONAL DESCRIPTION
INTRODUCTION
34929
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