MC33999 Datasheet, PDF (17/21 Pages) Motorola, Inc – 16-Output Switch with SPI and PWM Control

FUNCTIONAL DEVICE OPERATION
LOGIC COMMANDS AND REGISTERS
Table 6. Fault Operation
SERIAL OUTPUT (SO) PIN REPORTS
Overtemperature
Fault reported by Serial Output (SO) pin.
Overcurrent
SO pin reports short-to-battery/supply or overcurrent condition.
Output ON Open Load Fault
Not reported.
Output OFF Open Load Fault
SO pin reports output “OFF” open load condition.
DEVICE SHUTDOWNS
Overvoltage
Total device shutdown at V_PWR = 27.5 V to 35 V. Resumes normal operation with proper voltage. Upon
recovery all outputs assume previous state or OFF based on the Overvoltage bit in the Global Shutdown /
Retry Control register.
Overtemperature
Only the output experiencing an overtemperature shuts down. Output may auto-retry or remain OFF
according to the control bits in the Global Shutdown / Retry Control register.
Overcurrent
Output will remain in current limit 0.9 A to 2.5 A until thermal limit is reached. When thermal limit is
reached, device will enter overtemperature shutdown. Output will operate as programmed in the Global
Shutdown/Retry Control register. Fault flag in SO Response word will be set.
Analog Integrated Circuit Device Data
Freescale Semiconductor
33999
17