MC33874 Datasheet, PDF (1/38 Pages) Rohm – Quad High Side Switch (Quad 35mOHM)

Freescale Semiconductor
Advance Information
Document Number: MC33874
Rev. 9.0, 8/2008
Quad High Side Switch
(Quad 35mΩ)
33874
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.
HIGH SIDE SWITCH
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
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
VDD
VDD VPWR
VDD
VPWR
33874
VDD
VPWR
SO
SCLK
CS
SI
I/O
MCU
I/O
I/O
I/O
I/O
I/O
A/D
GND ^A/D
WAKE
HS0
SI
SCLK
CS
HS1
SO
RST
FS
IN0
HS2
IN1
IN2
IN3
HS3
CSNS
TEMP _GND
FSI
LOAD 0
LOAD 1
LOAD 2
LOAD 3
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.