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Freescale Semiconductor Electronic Components Datasheet



MC34929

Brushless DC 1.0 AMP 28 VOLT Motor Driver IC



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MC34929 pdf
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Freescale Semiconductor
Advance Information
Brushless DC 1.0 AMP 28 VOLT
Motor Driver IC
The 34929 Brushless DC (BLDC) Motor Driver IC is a complete
BLDC motor driver system in one chip. It is designed to efficiently drive
three-phase BLDC motors up to 1A and 28V, and has built in protection
features making it ideal for a variety of consumer, portable, and office
applications containing small motors. It incorporates digital I/O, making
it easy to use with an MCU in a closed-loop motor control system. It has
a built-in Hall-effect sensors interface and a Hall sensors voltage
supply, so it can operate BLDC motors as a stand-alone controller/
driver. Its sophisticated analog/mixed-signal state machine
accommodates several modes of operation, including: Forward (CW),
Reverse (CCW), Run/Stop, Braking, Variable Speed (External PWM),
and Torque Limit (maximum-current-limit) modes.
Features
• Single-Supply Operation (8V–28V)
• Built-in Hall Sensors Controlled-Supply (VH)
• 3-Phase Hall Sensors Interface
• Two Tachometer Outputs (1X and 3X Hall Frequency)
• Adjustable Maximum Current Limit (Torque Limiting)
• Adjustable Stalled Rotor Detection and Protection
• Short Circuit Detection and Protection
• Over-Temperature Detection and Thermal Shutdown
• Undervoltage Detection and Shutdown
• Pb-Free Packaging Designated by Suffix Code EP.
CP 34929
V+
Document Number: MC34929
Rev. 7.0, 11/2006
34929
BRUSHLESS DC MOTOR DRIVER
QFN SUFFIX
98ARH99033A
24-PIN QFN (4X4X1)
ORDERING INFORMATION
Device
Temperature
Range (TA)
Package
MC34929EP
-0°C to 85°C
24 QFN
BDLC
MOTOR
MCU
CP+ CP-
PWM
RUN
DIR
3XTACH
TACH
CT
GND
CRES V+
PHC
PHB
PHA
LSS
ISENS
PGND
VH
HAB+
HAB-
HBC+
HBC-
HCA+
HCA-
Figure 1. 34929 Simplified Application Diagram
* This document contains certain information on a new product.
Specifications and information herein are subject to change without notice.
© Freescale Semiconductor, Inc., 2006. All rights reserved.



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MC34929 pdf
INTERNAL BLOCK DIAGRAM
INTERNAL BLOCK DIAGRAM
V+
VDD
V Ref
Regs &
V Ref
CP+ CP-
CRES
Charge
Pump
VGHS
V+
High Side
Gate Drive
Low Side
Gate Drive
SC Det
Q1 Q3
Q5
Q2 Q4
Q6
PHC
PHB
PHA
LSS
PWM
RUN
DIR
CT
3XTACH
TACH
GND
34929
2
UVLO
TLIM
VO
G
V5V
V5V
VCC
V5V
Input
Protection
Stall
Det
Control
Logic
HAB
HBC
HCA
ILIM
ISENS
PGND
VH
HAB+
HAB-
HBC+
HBC-
HCA+
HCA-
Figure 2. 34929 Simplified Internal Block Diagram
Analog Integrated Circuit Device Data
Freescale Semiconductor



Part Number MC34929
Description Brushless DC 1.0 AMP 28 VOLT Motor Driver IC
Maker Freescale Semiconductor - Freescale Semiconductor
Total Page 23 Pages
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