E910.72A61DC ELMOS Semiconductor, E910.72A61DC Datasheet - Page 28

• Manufacturer Part Number: E910.72A61DC
• Description: Motor / Motion / Ignition Controllers & Drivers 6x HVAC motor driver/pulse count
• Manufacturer: ELMOS Semiconductor
• Type: DC Motor 6x Half Bridger

Specifications of E910.72A61DC

• Rohs: yes
• Product: Brushed DC Motor Drivers
• Operating Supply Voltage: 5 V
• Supply Current: 3 mA
• Operating Temperature: - 40 C to + 85 C
• Mounting Style: SMD/SMT
• Package / Case: QFN-32
• Number Of Outputs: 5
• Output Current: 100 mA
• Output Voltage: 6 V to 19 V
• Power Dissipation: 1 W

5.4 positioning by Means of ripple Detection
5.4.1 block Diagram
Figure 7: Block diagram of ripple detection
5.4.2 functional Description of ripple Detection
Three independent ripple detection blocks are implemented in the IC, as shown in Fig. 7. This allows positioning of
three DC motors simultaneously. Connections are: Motor 1 => OUT1/OUT2, Motor 2 => OUT3/OUT4, Motor 3 =>
OUT5/OUT6. It is also possible to operate up to 5 motors sequentially. Additional motors 4 and 5 are connected to
OUT2/OUT3, and OUT4/OUT5, respectively. For this purpose input multiplexers (MUX) of Ripple Detection Blocks
1 and 3 provide selection of 2 half bridges each.
The current consumption of a DC motor from the supply voltage under constant power and load conditions is not
constant, but features an AC component caused by the induced voltages of the motor windings and the current
commutation to consecutive windings. The shape of this AC component depends very much on the construction
of the motor. A common characteristic is the presence of a periodical signal with a frequency that is defined by the
motor speed and the number of rotor windings, equal to the number n of commutator segments. If n is an even
number, commutation of the brushes from one commutator segment to the next takes place simultaneously on
both brushes. If n is an odd number, commutation occurs alternatively. Thus the ripple frequency f
component is given by the following equations:
f
f
where s is the motor speed in revolutions per second
RIP
RIP
DC Motor 6 x Half briDgE witH ripplE CoUnt
aDVanCE proDUCt inforMation - MaY 05, 2011
ELMOS Semiconductor AG
=s · n if n is an even number
=2 · s · n if n is an odd number
PGND
PGND
PGND
OUT1
OUT2
OUT3
OUT4
OUT5
OUT6
Low side
Low side
Low side
Low side
Low side
Low side
driver
driver
driver
driver
driver
driver
No.1
No.2
No.3
No.4
No.5
No.6
Current
No. 1/2
Current
No. 3/4
Current
No. 5/6
sensor
sensor
sensor
GAIN
GAIN
GAIN
MUX
MUX
Ripple detector 1
Ripple detector 2
Ripple detector 3
Data Sheet
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C
C
C
Pulse detection
Sine wave detection
LP1
LP2
LP3
Arbitration
QM-No.: 25DS0057E.00
COUNTER
COUNTER
COUNTER
E910.72
RIP
of the AC