SLA7062 Просмотр технического описания (PDF) - Allegro MicroSystems
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SLA7062 Datasheet PDF : 16 Pages
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SLA7060M THRU SLA7062M
UNIPOLAR STEPPER-MOTOR
TRANSLATOR/DRIVERS
Applications Information (cont’d)
caused by increased operating junction temperatures. The
figure provides a normalized on-resistance curve, and all
thermal calculations should consider increases from the
given +25°C limits, which may be caused by internal
heating during normal operation.
These power MOSFET outputs feature an excellent
combination of fast switching, ruggedized device design,
low on resistance, and cost effectiveness.
Avalanche energy capability. There is a surge voltage
expected when the output MOSFET turns off, and this
voltage may exceed the MOSFET breakdown voltage
(V(BR)DS). However, the MOSFETs are avalanche type
and as long as the energy (E(AV)), which is imposed on the
MOSFET by the surge voltage, is less than the maximum
allowable value, it is considered to be within its safe
operating area. Note that the maximum allowable ava-
lanche energy is reduced as a function of temperature.
In application, the avalanche energy (E(AV)) dissipated
by the MOSFET is approximated as
E(AV) = VDS(AV) x 0.5 x ID x t
Output circuit for avalanche energy
calculations
SLA7062M
SLA7061M
SLA7060M
Lead temperature TL [°C) at GND pin (#11) close to the package
Allowable avalanche energy
Waveforms during avalanche breakdown
www.allegromicro.com
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