Document Number: MC33874
Rev. 9.0, 8/2008
Freescale Semiconductor
Advance Information
Quad High Side Switch
33874
(Quad 35mΩ)
The 33874 is one in a family of devices designed for low-voltage
automotive and industrial lighting and motor control applications. Its
four low RDS(ON) MOSFETs (four 35mΩ) can control the high sides of
four separate resistive or inductive loads.
HIGH SIDE SWITCH
Programming, control, and diagnostics are accomplished using a
16-bit SPI interface. Additionally, each output has its own parallel input
for pulse-width modulation (PWM) control if desired. The 33874 allows
the user to program via the SPI the fault current trip levels and duration
of acceptable lamp inrush or motor stall intervals. Such
programmability allows tight control of fault currents and can protect
wiring harnesses and circuit boards as well as loads.
The 33874 is packaged in a power-enhanced 12x12 nonleaded
Power QFN package with exposed tabs.
Features
PNA SUFFIX (PB_FREE)
98ART10510D
24-PIN PQFN (12 x 12)
• Quad 35mΩ high side switches (at 25°C)
• Operating voltage range of 6.0V to 27V with standby current <
5.0μA
• SPI control of over-current limit, over-current fault blanking time,
output OFF open load detection, output ON/OFF control,
watchdog timeout, slew rates, and fault status reporting
• SPI status reporting of over-current, open and shorted loads,
over-temperature, under-voltage and over-voltage shutdown,
fail-safe pin status, and program status
ORDERING INFORMATION
Temperature
Device
Package
Range (T )
A
• Analog current feedback with selectable ratio
• Analog board temperature feedback
MC33874BPNA/R2
-40°C to 125°C
24 PQFN
• Enhanced -16V reverse polarity VPWR protection
• Pb-free packaging designated by suffix code PNA
V
V
V
V
V
DD
DD
PWR
DD
PWR
33874
VDD
VPWR
HS0
WAKE
SI
SO
SCLK
CS
LOAD 0
LOAD 1
SCLK
CS
HS1
HS2
HS3
SI
SO
I/O
RST
MCU
I/O
I/O
FS
IN0
IN1
IN2
LOAD 2
LOAD 3
I/O
I/O
I/O
IN3
A/D
CSNS
TEMP
A/D
GND
GND
FSI
Figure 1. 33874 Simplified Application Diagram
* This document contains certain information on a new product.
Specifications and information herein are subject to change without notice.
© Freescale Semiconductor, Inc., 2006-2008. All rights reserved.