ON Semiconductor CS1112 Quad Power Output Driver Data Sheet User Manual

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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

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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. SO–24L DW SUFFIX

The SO lead is high impedance while CSB is high. An open drain

CASE 751E

output, (STATUS) reports a fault (short to VPWR, GND, or open load) has occurred at one or more of the outputs. Protection

PIN CONNECTIONS AND

Each output independently detects shorts to VPWR while the output

MARKING DIAGRAM

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

VDD ROSC

will be reset if the fault condition is removed from the output. The VPWR STATUS

fault data is latched when CSB is asserted low. OUT0 OUT3 IN0 IN3

If an overcurrent condition or short circuit to VBATT occurs, the

GND GND

output goes into a low duty cycle mode for the duration of the fault.

GND GND

The outputs are disabled during an overvoltage or undervoltage GND GND

condition. GND GND IN1 IN2 OUT1 OUT2

Features SI SO

4.0 MHz Serial Input Bus CSB SCLK

Parallel Input Control 1.0 Ω DMOS Drivers (typ)

= Assembly Location

Power On Reset WL, L = Wafer Lot YY, Y = Year

Internal Flyback Clamps

WW, W = Work Week

Status Output Fault Protection 46 V Peak Transient

ORDERING INFORMATION

Power Limiting

Device Package Shipping

Undervoltage

CS1112YDWF24 SO–24L 31 Units/Rail

Overvoltage

Fault Reporting CS1112YDWFR24 SO–24L 1000 Tape & Reel

Open Load Short Circuit 8 Internally Fused Leads

Semiconductor Components Industries, LLC, 2000 Publication Order Number: October, 2000 – Rev. 10 CS1112/D