Freescale Semiconductor
Advance Information
Document Number:
MC33874
Rev. 9.0, 8/2008
Quad High Side Switch
(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 R
DS(ON)
MOSFETs (four 35mΩ) can control the high sides of
four separate resistive or inductive loads.
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 12 x 12 nonleaded
Power QFN package with exposed tabs.
Features
• 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
• Analog current feedback with selectable ratio
• Analog board temperature feedback
• Enhanced -16V reverse polarity V
PWR
protection
• Pb-free packaging designated by suffix code PNA
VDD
VDD
VPWR
VDD
33874
HIGH SIDE SWITCH
PNA SUFFIX (PB_FREE)
98ART10510D
24-PIN PQFN (12 x 12)
ORDERING INFORMATION
Device
MC33874BPNA/R2
Temperature
Range (T
A
)
- 40°C to 125°C
Package
24 PQFN
VPWR
33874
VDD
WAKE
SO
SCLK
CS
SI
MCU
I/O
I/O
I/O
I/O
I/O
I/O
A/D
GND A/D
SI
SCLK
CS
SO
RST
FS
IN0
IN1
IN2
IN3
CSNS
TEMP
FSI
GND
HS3
LOAD 3
HS2
LOAD 2
HS1
LOAD 1
VPWR
HS0
LOAD 0
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.
FREESCALE [ FREESCALE SEMICONDUCTOR, INC ]
