uP7550

5

uP7550-DS-F0002, July 2013

www.upi-semi.com

or false triggering. If an over temperature shutdown occurs,

the OC# is asserted instantaneously.

Under Voltage Lockout

A voltage sense circuit monitors the input voltage. When

the input voltage is below approximately 4.2V, a control

signal turns off the power switch.

Over Temperature Protection

The uP7550 continuously monitors the operating

temperature of the power switch for over temperature

protection. The uP7550 asserts over temperature and turns

off the power switch to prevent the device from damage if

over current or short-circuit conditions. Hysteresis is built

into the thermal sense, the switch will not turn back on

until the device has cooled approximately 20 degrees. The

open-drain false reporting output (OC#) is asserted (active

low) when an overtemperature shutdown or over current

occurs. If the fault condition is not removed, the switch will

pulse on and off as the temperature cycles between these

limits.

Functional Description