Rainbow-electronics MAX4995 Manual de usuario descargar pdf (Pagina 9)

MAX4995A/AF/AL/MAX4995B/MAX4995C

50mA to 600mA Programmable

Current-Limit Switches

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FLAG

Indicator

FLAG is an open-drain fault indicator output and requires

an external pullup resistor to a DC supply. FLAG goes

low when any of the following conditions occurs:

• The device is in current-limit mode.

• The OUT voltage is above the IN voltage by more

than 110mV (typ).

• The die temperature exceeds the thermal-shutdown

temperature limit of +150°C.

• SETI is connected to ground.

Thermal Shutdown

Thermal-shutdown circuitry protects the devices from

overheating. The switch turns off and FLAG goes low

immediately when the junction temperature exceeds

+150°C (typ). The switch turns on again after the device

temperature drops by approximately 15°C (typ).

RETRY

BLANK

RETRY

FLAG

OUT

CURRENT LIMIT

LOAD CURRENT

THE DEVICE GOES TO

THERMAL-SHUTDOWN MODE

Figure 2. Autoretry Fault Diagram

BLANK

FLAG

OUT

CURRENT LIMIT

LOAD CURRENT

THE DEVICE GOES TO

THERMAL-SHUTDOWN MODE

Figure 3. Latchoff Fault Diagram

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Rainbow-electronics MAX4995 Manual de usuario Pagina 9