33894 Datasheet, PDF (1/28 Pages) Freescale Semiconductor, Inc – Quad High-Side Switch

Freescale Semiconductor
Advance Information
Document Number: MC33894
Rev 3.0, 10/2006
Quad High-Side Switch
(Quad 35 mΩ)
The 33894 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 35 mΩ) 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 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 x 12 nonleaded
Power QFN package with exposed tabs.
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
• 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 V_PWR Protection
•
33894
QUAD HIGH-SIDE SWITCH 35 mΩ
Bottom View
PNA SUFFIX
98ARL10596D
24-PIN PQFN
ORDERING INFORMATION
Device
Temperature
Range (T_A)
Package
MC33894PNA/R2 -40°C to 125°C
24 PQFN
VDD
VDD VPWR
VDD
VPWR
I/O
SCLK
CS
SI
I/O
MCU
SO
I/O
I/O
I/O
I/O
A/D
GND
33894
VDD
VPWR
WAKE
HS0
FS
SCLK
CS
HS1
SO
RST
SI
IN0
HS2
IN1
IN2
IN3
HS3
CSNS
FSI _GND
LOAD 0
LOAD 1
LOAD 2
LOAD 3
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.