BA6832FS Datasheet, PDF (7/8 Pages) Rohm – Voice coil motor driver

Motor driver ICs
FOperation notes
(1) Thermal shutdown circuit
The IC has a built-in thermal shutdown circuit. The circuit
turns off all the driver outputs when the chip junction tem-
perature rises to about 175_C (typical). There is a tem-
perature difference of 20_C (typical) between the tem-
peratures at which the circuit is activated and
deactivated.
(2) Vctl, Vref, and input pins
If voltage is applied to Vctl (pin 18) and Vref (pin 19) when
the VCC voltage is outside the operating voltage, the driv-
er outputs are turned on and a current may flow through
the connected motor. The voltage of each input pin
should be less than VCC and more than the ground volt-
age.
BA6832FS
(3) Temperature dependence of quiescent circuit cur-
rent (ICC)
When the IC temperature rises with Vctl=Vref and
CE=LOW in the quiescent mode, ICC may increase due
to the temperature dependence of the standby current
that flows through the high- and low-side transistors.
(4) Package power dissipation
The IC power dissipation changes greatly with the supply
voltage and the output current. Give full consideration to
the power dissipation rating when setting the supply volt-
age and the output current.
FElectrical characteristic curves
515