BA6813 datasheet(5/6 Pages) ROHM

5 / 6 page

716

Motor driver ICs

BA6811F / BA6813F

FApplication example

FOperation notes

(1)

Thermal shutdown circuit

The IC has a built-in thermal shutdown circuit. The is a

temperature difference of 25

_C (typical) between the

temperatures at which the circuit is activated and deacti-

vated.

The circuit is activated at the temperature of about 175

(typical), so that all outputs are turned OFF. Normal op-

eration resumes when the circuit is deactivated.

(2)

Power consumption

Power consumed in the IC can be calculated from the fol-

lowing equation :

PC=PC1

)PC2)PC3

PC1 is power consumed by the circuit current.

PC1=VCC

ICC

PC2 is the output current consumption.

PC2=VOL

VOL is the LOW level output voltage of output pins

1 and 2, and IO is the sink current of pins 1 and 2.

PC3 is power consumed by the AL and HO pins.

PC3=VALL

IAL

)VHOL IHO /2

where

VALL is the AL-pin LOW level voltage,

IAL is the AL-pin sink current,

VHOL is the HO-pin LOW level voltage,

IHO is the HO-pin sink current.

Make sure that your application does not exceed the al-

lowable power dissipation of the IC.

BA6813 Datasheet(PDF) 5 Page - Rohm