A
T
B
T
Top Drive
Output
16
Bottom
Drive
Outputs
15
(Top View)
17
18
19
20
21
10
9
8
7
6
5
Sensor
Inputs
4
Oscillator
Current Sense
Noninverting Input
Reference Output
Output Enable
S
C
S
B
S
A
60
°
/120
°
Select
Fwd/Rev
Current Sense
Inverting Input
Gnd
V
CC
C
T
22
23
B
B
C
B
3
24
Brake
2
A
B
1
V
C
MC33035
SEMICONDUCTOR
TECHNICAL DATA
BRUSHLESS DC
MOTOR CONTROLLER
PIN CONNECTIONS
Order this document by MC33035/D
24
1
24
1
P SUFFIX
PLASTIC PACKAGE
CASE 724
DW SUFFIX
PLASTIC PACKAGE
CASE 751E
(SO24L)
14
13
12
11
Error Amp
Inverting Input
Error Amp
Noninverting Input
Error Amp Out/
PWM Input
Fault Output
1
MOTOROLA ANALOG IC DEVICE DATA
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,
cyclebycycle 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 3Phase MOSFET Bridge
·
CycleByCycle Current Limiting
·
PinnedOut Current Sense Reference
·
Internal Thermal Shutdown
·
Selectable 60
°
/300
°
or 120
°
/240
°
Sensor Phasings
·
Can Efficiently Control Brush DC Motors with External MOSFET
HBridge
ORDERING INFORMATION
Device
Operating
Temperature Range
Package
MC33035DW
T
A
= 40
°
to + 85
°
C
SO24L
MC33035P
T
A
= 40
°
to + 85
°
C
Plastic DIP
©
Motorola, Inc. 1996
Rev 2
MC33035
2
MOTOROLA ANALOG IC DEVICE DATA
Motor
Enable
Q
S
C
T
R
R
T
Oscillator
Error Amp
PWM
Thermal
Shutdown
Reference
Regulator
Lockout
Undervoltage
V
in
Fwd/Rev
Q
R
S
Faster
S
S
V
M
Speed
Set
This device contains 285 active transistors.
Representative Schematic Diagram
Rotor
Position
Decoder
Output
Buffers
Current Sense
Reference
60
°
/120
°
18
17
Brake
Fault
N
N
7
2
3
6
5
4
8
11
12
13
10
14
2
1
24
21
20
19
9
15
23
16
MC33035
3
MOTOROLA ANALOG IC DEVICE DATA
MAXIMUM RATINGS
Rating
Symbol
Value
Unit
Power Supply Voltage
V
CC
40
V
Digital Inputs (Pins 3, 4, 5, 6, 22, 23)
V
ref
V
Oscillator Input Current (Source or Sink)
I
OSC
30
mA
Error Amp Input Voltage Range
(Pins 11, 12, Note 1)
V
IR
0.3 to V
ref
V
Error Amp Output Current
(Source or Sink, Note 2)
I
Out
10
mA
Current Sense Input Voltage Range (Pins 9, 15)
V
Sense
0.3 to 5.0
V
Fault Output Voltage
V
CE(Fault)
20
V
Fault Output Sink Current
I
Sink(Fault)
20
mA
Top Drive Voltage (Pins 1, 2, 24)
V
CE(top)
40
V
Top Drive Sink Current (Pins 1, 2, 24)
I
Sink(top)
50
mA
Bottom Drive Supply Voltage (Pin 18)
V
C
30
V
Bottom Drive Output Current
I
DRV
100
mA
(Source or Sink, Pins 19, 20, 21)
Power Dissipation and Thermal Characteristics
P Suffix, Dual In Line, Case 724
Maximum Power Dissipation @ T
A
= 85
°
C
P
D
867
mW
Thermal Resistance, JunctiontoAir
R
JA
75
°
C/W
DW Suffix, Surface Mount, Case 751E
Maximum Power Dissipation @ T
A
= 85
°
C
P
D
650
mW
Thermal Resistance, JunctiontoAir
R
JA
100
°
C/W
Operating Junction Temperature
T
J
150
°
C
Operating Ambient Temperature Range
T
A
40 to + 85
°
C
Storage Temperature Range
T
stg
65 to +150
°
C
ELECTRICAL CHARACTERISTICS
(V
CC
= V
C
= 20 V, R
T
= 4.7 k, C
T
= 10 nF, T
A
= 25
°
C, unless otherwise noted.)
Characteristic
Symbol
Min
Typ
Max
Unit
REFERENCE SECTION
Reference Output Voltage (I
ref
= 1.0 mA)
T
A
= 25
°
C
T
A
= 40
°
to + 85
°
C
V
ref
5.9
5.82
6.24
6.5
6.57
V
Line Regulation (V
CC
= 10 to 30 V, I
ref
= 1.0 mA)
Reg
line
1.5
30
mV
Load Regulation (I
ref
= 1.0 to 20 mA)
Reg
load
16
30
mV
Output Short Circuit Current (Note 3)
I
SC
40
75
mA
Reference Under Voltage Lockout Threshold
V
th
4.0
4.5
5.0
V
ERROR AMPLIFIER
Input Offset Voltage (T
A
= 40
°
to + 85
°
C)
V
IO
0.4
10
mV
Input Offset Current (T
A
=
40
°
to + 85
°
C)
I
IO
8.0
500
nA
Input Bias Current (T
A
=
40
°
to + 85
°
C)
I
IB
46
1000
nA
Input Common Mode Voltage Range
V
ICR
(0 V to V
ref
)
V
Open Loop Voltage Gain (V
O
= 3.0 V, R
L
= 15 k)
A
VOL
70
80
dB
Input Common Mode Rejection Ratio
CMRR
55
86
dB
Power Supply Rejection Ratio (V
CC
= V
C
= 10 to 30 V)
PSRR
65
105
dB
NOTES: 1. The input common mode voltage or input signal voltage should not be allowed to go negative by more than 0.3 V.
2. The compliance voltage must not exceed the range of 0.3 to V
ref
.
3. Maximum package power dissipation limits must be observed.
MC33035
4
MOTOROLA ANALOG IC DEVICE DATA
ELECTRICAL CHARACTERISTICS
(continued) (V
CC
= V
C
= 20 V, R
T
= 4.7 k, C
T
= 10 nF, T
A
= 25
°
C, unless otherwise noted.)
Characteristic
Symbol
Min
Typ
Max
Unit
ERROR AMPLIFIER
Output Voltage Swing
High State (R
L
= 15 k to Gnd)
Low State (R
L
= 15 k to V
ref
)
V
OH
V
OL
4.6
5.3
0.5
1.0
V
OSCILLATOR SECTION
Oscillator Frequency
f
OSC
22
25
28
kHz
Frequency Change with Voltage (V
CC
= 10 to 30 V)
f
OSC
/
V
0.01
5.0
%
Sawtooth Peak Voltage
V
OSC(P)
4.1
4.5
V
Sawtooth Valley Voltage
V
OSC(V)
1.2
1.5
V
LOGIC INPUTS
Input Threshold Voltage (Pins 3, 4, 5, 6, 7, 22, 23)
High State
Low State
V
IH
V
IL
3.0
2.2
1.7
0.8
V
Sensor Inputs (Pins 4, 5, 6)
High State Input Current (V
IH
= 5.0 V)
Low State Input Current (V
IL
= 0 V)
I
IH
I
IL
150
600
70
337
20
150
µ
A
Forward/Reverse, 60
°
/120
°
Select (Pins 3, 22, 23)
High State Input Current (V
IH
= 5.0 V)
Low State Input Current (V
IL
= 0 V)
I
IH
I
IL
75
300
36
175
10
75
µ
A
Output Enable
µ
A
Output Enable
High State Input Current (V
IH
= 5.0 V)
L
S
I
C
(V
0 V)
I
IH
I
60
60
29
29
10
10
µ
A
g
p
(
IH
)
Low State Input Current (V
IL
= 0 V)
IH
I
IL
60
29
10
CURRENTLIMIT COMPARATOR
Threshold Voltage
V
th
85
101
115
mV
Input Common Mode Voltage Range
V
ICR
3.0
V
Input Bias Current
I
IB
0.9
5.0
µ
A
OUTPUTS AND POWER SECTIONS
Top Drive Output Sink Saturation (I
sink
= 25 mA)
V
CE(sat)
0.5
1.5
V
Top Drive Output OffState Leakage (V
CE
= 30 V)
I
DRV(leak)
0.06
100
µ
A
Top Drive Output Switching Time (C
L
= 47 pF, R
L
= 1.0 k)
ns
Rise Time
t
r
107
300
Fall Time
t
f
26
300
Bottom Drive Output Voltage
V
Bottom Drive Output Voltage
High State (V
CC
= 20 V, V
C
= 30 V, I
source
= 50 mA)
L
S
(V
20 V V
30 V I
0
A)
V
OH
V
(V
CC
2.0)
(V
CC
1.1)
1
2 0
V
g
(
CC
C
source
)
Low State (V
CC
= 20 V, V
C
= 30 V, I
sink
= 50 mA)
OH
V
OL
(
CC
)
(
CC
)
1.5
2.0
Bottom Drive Output Switching Time (C
L
= 1000 pF)
ns
Rise Time
t
r
38
200
Fall Time
t
f
30
200
Fault Output Sink Saturation (I
sink
= 16 mA)
V
CE(sat)
225
500
mV
Fault Output OffState Leakage (V
CE
= 20 V)
I
FLT(leak)
1.0
100
µ
A
Under Voltage Lockout
V
Drive Output Enabled (V
CC
or V
C
Increasing)
V
th(on)
8.2
8.9
10
Hysteresis
V
H
0.1
0.2
0.3
Power Supply Current
mA
Power Supply Current
Pin 17 (V
CC
= V
C
= 20 V)
I
CC
12
16
mA
Pin 17 (V
CC
V
C
20 V)
Pin 17 (V
CC
= 20 V, V
C
= 30 V)
I
CC
12
14
16
20
(
CC
0 ,
C
30
)
Pin 18 (V
CC
= V
C
= 20 V)
I
C
3.5
0
6.0
(
CC
C
)
Pin 18 (V
CC
= 20 V, V
C
= 30 V)
C
5.0
10
MC33035
5
MOTOROLA ANALOG IC DEVICE DATA
V sat
, OUTPUT
SA
TURA
TION VOL
T
AGE
(V)
5.0
µ
s/DIV
A
V
= +1.0
No Load
T
A
= 25
°
C
, OUTPUT
VOL
T
AGE
(V)
O
4.5
3.0
1.5
1.0
µ
s/DIV
A
V
= +1.0
No Load
T
A
= 25
°
C
3.05
3.0
2.95
Gnd
V
ref
I
O
, OUTPUT LOAD CURRENT (mA)
f, FREQUENCY (Hz)
56
1.0 k
220
200
180
160
140
120
100
80
60
24
16
8.0
0
8.0
16
24
32
40
48
10 M
1.0 M
100 k
10 k
40
240
A
VOL
, OPEN LOOP
VOL
T
AGE GAIN (dB)
EXCESS PHASE (DEGREES),
Phase
Gain
T
A
, AMBIENT TEMPERATURE (
°
C)
55
4.0
2.0
0
2.0
125
4.0
100
75
50
25
0
25
f OSC
OSCILLA
T
OR
FREQUENCY
CHANGE (%)
,
100
C
T
= 1.0 nF
C
T
= 100 nF
1.0
R
T
, TIMING RESISTOR (k
)
1000
100
10
0
10
f OSC
OSCILLA
T
OR FREQUENCY
(kHz)
,
C
T
= 10 nF
Figure 1. Oscillator Frequency versus
Timing Resistor
Figure 2. Oscillator Frequency Change
versus Temperature
Figure 3. Error Amp Open Loop Gain and
Phase versus Frequency
Figure 4. Error Amp Output Saturation
Voltage versus Load Current
Figure 5. Error Amp SmallSignal
Transient Response
Figure 6. Error Amp LargeSignal
Transient Response
0
1.0
2.0
0
0.8
1.6
1.6
0.8
5.0
4.0
3.0
0
V
CC
= 20 V
V
C
= 20 V
T
A
= 25
°
C
V
CC
= 20 V
V
C
= 20 V
R
T
= 4.7 k
C
T
= 10 nF
Source Saturation
(Load to Ground)
V
CC
= 20 V
V
C
= 20 V
T
A
= 25
°
C
Sink Saturation
(Load to V
ref
)
V
, OUTPUT
VOL
T
AGE
(V)
O
V
V
CC
= 20 V
V
C
= 20 V
V
O
= 3.0 V
R
L
= 15 k
C
L
= 100 pF
T
A
= 25
°
C
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