E910.72A61DC ELMOS Semiconductor, E910.72A61DC Datasheet - Page 29

• 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

Figure 8: Typical motor current under different load conditions
Fig. 8 shows the typical current shape of a small, symmetrical DC motor with three rotor windings as used in HVAC
actuators under different load conditions. It can be interpreted as the superposition of a sequence of inverse sinu-
soidal "peaks" (from 60° to 120°, i.e. ±30° around the amplitude value of the generator voltage), and exponential
inrush curves defined by the L-R time constant of the motor windings.
At the moment of commutation current direction is changed in the winding which is connected to the two con-
secutive commutator segments involved. This change of direction is delayed due to the winding inductance, which
leads to a very rapid current drop on every commutation, visible at high and medium motor currents.
When the average motor current becomes very small with even negative momentary values (see Fig. 8), this sig-
nificant drop gets very small, and can even vanish completely. The reason is, that when the motor comes close to
generator mode the momentary current during commutation becomes very small or even zero. This condition may
occur in an HVAC system when air pressure on the flap is in the same direction as the flap movement.
Figure 9: Typical motor current during start
DC Motor 6 x Half briDgE witH ripplE CoUnt
aDVanCE proDUCt inforMation - MaY 05, 2011
ELMOS Semiconductor AG
0
I
MOT
0
0
0
I
I
I
MOT
MOT
MOT
a) High motor current
b) Medium motor current
c) Low motor current
Data Sheet
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QM-No.: 25DS0057E.00
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E910.72