Document Number: MC33894
Freescale Semiconductor
Advance Information
Rev 3.0, 10/2006
Quad High-Side Switch
(Quad 35 mΩ)
33894
The 33894 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 35 mΩ) can control the high sides
of four separate resistive or inductive loads.
QUAD HIGH-SIDE SWITCH 35 mΩ
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 33894
allows the user to program the fault current trip levels and duration of
acceptable lamp inrush or motor stall intervals via the SPI. Such
programmability allows tight control of fault currents and can protect
wiring harnesses and circuit boards as well as loads.
The 33894 is packaged in a power-enhanced 12 x12 nonleaded
Power QFN package with exposed tabs.
Bottom View
PNA SUFFIX
98ARL10596D
24-PIN PQFN
Features
• Quad 35 mΩ High-Side Switches (at 25°C)
• Operating Voltage Range of 6.0 V to 27 V with Standby Current
< 5.0 µA
• SPI Control of Overcurrent Limit, Overcurrent Fault Blanking
Time, Output OFF Open Load Detection, Output ON/OFF
Control, Watchdog Timeout, Slew Rates, and Fault Status
Reporting
ORDERING INFORMATION
Temperature
Device
Package
Range (T )
A
• SPI Status Reporting of Overcurrent, Open and Shorted Loads,
Overtemperature, Undervoltage and Overvoltage Shutdown,
Fail-Safe Pin Status, and Program Status
• Analog Current Feedback with Selectable Ratio
• Enhanced -16 V Reverse Polarity VPWR Protection
•
MC33894PNA/R2
24 PQFN
-40°C to 125°C
V
V
PWR
V
V
V
DD
DD
DD
PWR
33894
VPWR
HS0
VDD
WAKE
FS
I/O
SCLK
CS
LOAD 0
SCLK
CS
HS1
HS2
SI
SO
LOAD 1
I/O
RST
SI
MCU
SO
I/O
IN0
IN1
IN2
IN3
CSNS
FSI
LOAD 2
LOAD 3
I/O
I/O
I/O
HS3
A/D
GND
GND
Figure 1. 33894 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. All rights reserved.