E910.72A61DC ELMOS Semiconductor, E910.72A61DC Datasheet - Page 27

• 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

5.3.2 short Circuit to External battery supply Vbat_Ex
A diode in the supply line VBAT_EX to VBAT_HV is recommended for reverse battery protection. Thus the supply
voltage of the IC is one diode forward voltage lower than the actual battery voltage VBAT_HV. If a short circuit of an
half bridge output to the battery VBAT_EX occurs, the high side transistor will conduct current into the IC's supply,
if it is turned on. If it is off, current will be conducted by the high side driver's reverse diode, which is connected in
parallel to the external reverse voltage protection diode D1. A parasitic PNP bipolar transistor will also drive current
into the IC's substrate. This current may cause significant power dissipation, and after some time the overtempera-
ture shut off may switch all outputs into tristate mode. The IC's current consumption from VBAT_HV will go down
below IBAT,STBY and the remaining power dissipation caused by the parasitic PNP transistor cannot damage the
IC. To achieve this self-protection feature it is important that no additional current is drawn from the IC's battery
supply. Therefore it is recommended to use a separate reverse voltage protection diode for each IC E910.72.
5.3.3 Driving loads other than DC Motors
Half bridge outputs that are not used for DC motor control may drive other kinds of load such as relays or LEDs,
as well. In case of overvoltage half bridge outputs are switched to 0, which means that low side transistors are
switched on. This is to avoid bulk current being induced by inductive loads in case the output has been switched
into tristate mode. Therefore, loads like relays have to be connected to ground and not to battery supply.
Due to some parasitic currents that may flow in case of ground shift, it is recommended to use the half bridge out-
puts only for relays, LEDs, and similar loads that are placed on the same printed circuit board (PCB).
Switching an output to high level is performed by setting the corresponding direction bit to 1b, for low level a 0b
has to be transmitted. All functions related to ripple detection are switched off. Protection features for overcur-
rent, and overtemperature are the same as in motor control mode. Overvoltage leads to shut-off (i.e. switch off,
low side driver active) of the output after a debounce time of typically 10ms. But other than in motor control mode,
the output will be turned on again automatically when the voltage has returned to normal condition, after the
same debounce time. Undervoltage does not switch off the outputs. Both, overvoltage and undervoltage do not
activate output DRB and no diagnostic information is created.
DC Motor 6 x Half briDgE witH ripplE CoUnt
aDVanCE proDUCt inforMation - MaY 05, 2011
ELMOS Semiconductor AG
Data Sheet
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QM-No.: 25DS0057E.00
E910.72