CS1112

CS1112 Quad Power Output Driver The CS1112 is a Power Output Driver. The IC incorporates four protected DMOS low–side drivers designed to drive inductive and resistive loads in an automotive environment. The outputs are controlled by an 8–bit serial peripheral interface (SPI) or its associated parallel input. Each output contains overcurrent protection, open load detection, and inductive flyback clamps. The device is overvoltage protected. Overcurrent and open load faults are reported over the SPI port, and at the STATUS lead. I/O Control SPI communication is initiated by asserting CSB low. Data at the SI lead is transferred on the rising edge of SCLK. The MSB is transferred first. The outputs become active at the rising edge of CSB. Diagnostic status bits are transferred out the SO lead at the falling edge of SCLK. The SO lead is high impedance while CSB is high. An open drain output, (STATUS) reports a fault (short to VPWR, GND, or open load) has occurred at one or more of the outputs. Protection Each output independently detects shorts to VPWR while the output is “on” and open load/short to ground while the output is “off”. The fault register will be set if a fault occurs at the output. The fault register will be reset if the fault condition is removed from the output. The fault data is latched when CSB is asserted low. If an overcurrent condition or short circuit to VBATT occurs, the output goes into a low duty cycle mode for the duration of the fault. The outputs are dis...