AS1370 datasheet(13/28 Pages) AMSCO

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ams Datasheet

Page 13

[v2-00] 2016-Jun-01

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AS1370 − Detailed Description

Current Limiting

The AS1370 include current limiting circuitry to protect against

short-circuit conditions. The circuitry monitors and controls the

gate voltage of the P-channel MOSFET, limiting the output

current to 370mA. The P-channel MOSFET output can be

shorted to ground for an indefinite period of time without

damaging the device.

Thermal-Overload Protection

The devices are protected against thermal runaway conditions

by the integrated thermal sensor circuitry. Thermal shutdown

is an effective tool to prevent die overheating since the power

transistor is the principle heat source in the device.

If the junction temperature exceeds 170°C, the thermal sensor

starts the shutdown logic, at which point the P-channel MOSFET

is switched off. After the device temperature has dropped by

approximately 15°C, the thermal sensor will turn the P-channel

MOSFET on again. Note that this will be exhibited as a pulsed

output under continuous thermal-overload conditions.

Note(s): The absolute maximum junction-temperature of

170°C should not be exceeding during continual operation.

AS1370 датащи(PDF) 13 Page - ams AG