MC33035 Datasheet, PDF (1/24 Pages) ON Semiconductor – BRUSHLESS DC MOTOR CONTROLLER

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MC33035
Brushless DC
Motor Controller
The MC33035 is a high performance second generation monolithic
brushless DC motor controller containing all of the active functions required
to implement a full featured open loop, three or four phase motor control
system. This device consists of a rotor position decoder for proper
commutation sequencing, temperature compensated reference capable of
supplying sensor power, frequency programmable sawtooth oscillator, three
open collector top drivers, and three high current totem pole bottom drivers
ideally suited for driving power MOSFETs.
Also included are protective features consisting of undervoltage lockout,
cycle–by–cycle current limiting with a selectable time delayed latched
shutdown mode, internal thermal shutdown, and a unique fault output that
can be interfaced into microprocessor controlled systems.
Typical motor control functions include open loop speed, forward or
reverse direction, run enable, and dynamic braking. The MC33035 is
designed to operate with electrical sensor phasings of 60°/300° or
120°/240°, and can also efficiently control brush DC motors.
• 10 to 30 V Operation
• Undervoltage Lockout
• 6.25 V Reference Capable of Supplying Sensor Power
• Fully Accessible Error Amplifier for Closed Loop Servo Applications
• High Current Drivers Can Control External 3–Phase MOSFET Bridge
• Cycle–By–Cycle Current Limiting
• Pinned–Out Current Sense Reference
• Internal Thermal Shutdown
• Selectable 60°/300° or 120°/240° Sensor Phasings
• Can Efficiently Control Brush DC Motors with External MOSFET
H–Bridge
Device
MC33035DW
MC33035P
ORDERING INFORMATION
Operating
Temperature Range
T_A = – 40° to + 85°C
Package
SO–24L
Plastic DIP
BRUSHLESS DC
MOTOR CONTROLLER
SEMICONDUCTOR
TECHNICAL DATA
P SUFFIX
PLASTIC PACKAGE
CASE 724
24
1
DW SUFFIX
PLASTIC PACKAGE
CASE 751E
(SO–24L)
24
1
PIN CONNECTIONS
Top Drive
Output
B_T 1
A_T 2
Fwd/Rev 3
Sensor
Inputs
S_A 4
S_B 5
S_C 6
Output Enable 7
Reference Output 8
Current Sense
Noninverting Input
9
Oscillator ¹⁰
Error Amp
Noninverting Input
11
Error Amp
Inverting Input
12
24 C_T
23 Brake
22 60°/120° Select
21 AB
20 B_B
19 C_B
Bottom
Drive
Outputs
18 V_C
17 V_CC
16 Gnd
15
Current Sense
Inverting Input
14 Fault Output
13
Error Amp Out/
PWM Input
(Top View)
MOTOROLA ANALOG IC DEVICE DATA
© Motorola, Inc. 1996
Rev 2
1