MC33035DWR2G ON Semiconductor, MC33035DWR2G Datasheet - Page 19

• Manufacturer Part Number: MC33035DWR2G
• Description: IC CTRLR MOTOR DC BRSHLSS 24SOIC
• Manufacturer: ON Semiconductor
• Type: Brushless DC Motor Controllerr

Specifications of MC33035DWR2G

• Applications: DC Motor Controller, Brushless (BLDC)
• Number Of Outputs: 1
• Current - Output: 100mA
• Voltage - Load: 5.9 V ~ 6.5 V
• Voltage - Supply: 10 V ~ 30 V
• Operating Temperature: -40°C ~ 85°C
• Mounting Type: Surface Mount
• Package / Case: 24-SOIC (7.5mm Width)
• Operating Supply Voltage: 10 V to 30 V
• Supply Current: 20 mA
• Mounting Style: SMD/SMT
• Operating Current: 20mA
• Operating Temperature Classification: Industrial
• Package Type: SOIC
• Operating Supply Voltage (min): 10V
• Operating Supply Voltage (max): 30V
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Other names: MC33035DWR2GOS; MC33035DWR2GOS; MC33035DWR2GOSTR

controller. This configuration is ideally suited for
automotive and other low voltage applications since there is
only one power switch voltage drop in series with a given
stator winding. Current flow is unidirectional or half wave
because only one end of each winding is switched.
Continuous braking with the typical half wave arrangement
presents a motor overheating problem since stator current is
limited only by the winding resistance. This is due to the lack
of upper power switch transistors, as in the full wave circuit,
used to disconnect the windings from the supply voltage
R
C
Figure 38 shows a three phase, three step, half wave motor
T
T
60°/120°
Fwd/Rev
Speed
Set
V
M
Faster
22
17
18
11
13
10
12
4
5
6
3
7
8
Error Amp
Reference
Regulator
25 μA
Figure 38. Three Phase, Three Step, Half Wave Motor Controller
Oscillator
PWM
Undervoltage
Lockout
Shutdown
Thermal
Gnd
R
S
S
R
Decoder
Position
Rotor
MC33035, NCV33035
Q
Q
16
http://onsemi.com
19
V
stops and then turn off the bottom drives. This can be
accomplished by using the Fault Output in conjunction with
the Output Enable as an over current timer. Components
R
to stop before latching the Output Enable and the top drive
AND gates low. When enabling the motor, the brake switch
is closed and the PNP transistor (along with resistors R
R
stator flyback voltage is clamped by a single zener and three
diodes.
M
DLY
DLY
. A unique solution is to provide braking until the motor
) are used to reset the latch by discharging C
and C
Brake
23
DLY
I
Limit
C
are selected to give the motor sufficient time
DLY
24
1
14
2
21
20
19
9
15
R
DLY
V
R
R
M
2
1
S
Motor
N
N
DLY
S
1
. The
and