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Motorola Electronic Components Datasheet

MC33291 Datasheet

Eight Output Switch with Serial Peripheral Interface I/O

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Freescale Semiconductor, Inc.
MOTOROLA
SEMICONDUCTOR TECHNICAL DATA
Document order number: MC33291/D
Rev 2, 11/2002
Eight Output Switch with Serial
Peripheral Interface I/O
The 33291 device is an eight output, low side power switch with 8-bit serial
input control. The 33291 is a versatile circuit designed for automotive applica-
tions, but is well suited for other environments. The 33291 incorporates
SMARTMOStechnology, with CMOS logic, bipolar/MOS analog circuitry,
and DMOS power MOSFETs. The 33291 interfaces directly with a microcon-
troller to control various inductive or incandescent loads.
The circuit’s innovative monitoring and protection features include: Very
Low Standby Current, SPI Cascade Fault Reporting Capability, Internal 53 V
Clamp on Each Output, Output Specific Diagnostics, Independent Shutdown
of Outputs.
The device is parametrically specified over an ambient temperature range
of -40°C TA 125°C and 9.0 V VPWR 16 V supply.
Features:
• Designed to Operate Over Wide Supply Voltages of 5.5 to 26.5 V
• Interfaces to Microprocessor Using 8-Bit SPI I/O Protocol up to 3.0 MHz
• 1.0 A Peak Current Outputs with Maximum RDS(on) of 1.6 at TJ - 150°C
• Outputs Current Limited to Accommodate In-rush Currents Associated
with Switching Incandescent Loads
• Output Voltages Clamped to 53 V During Inductive Switching
• Maximum Sleep Current (IPWR) of 25 µA
• Maximum of 4.0 mA IDD During Operation
33291
EIGHT OUTPUT SWITCH
(SPI I/O)
Package Options
DW SUFFIX
PLASTIC PACKAGE
CASE 751E
SOICW (16+4+4)
ORDERING INFORMATION
Device
Temperature
Range TA
Package
MC33291DW
-40°C to 125°C
SOIC-24
MC33291DWR2 -40°C to 125°C
SOIC-24
33291 Simplified Application Schematic
SFPD
VDD
Micro-
controller
SFPD
CS
SCLK
CMOS
Input
Logic
SI
RST
SO
CMOS
Serial
Shift
Registers
and
Latches
VPWR
Output 0
Output 1
Updrain
DMOS
Output
Switches
and
Sense
Circuits
Output 2
Output 3
Output 4
Output 5
Output 6
Output 7
+VBAT
GND
This device contains 1266 active transistors.
© Motorola, Inc. 2002
For More Information On This Product,
Go to: www.freescale.com


Motorola Electronic Components Datasheet

MC33291 Datasheet

Eight Output Switch with Serial Peripheral Interface I/O

No Preview Available !

Freescale Semiconductor, Inc.
VDD
16
SFPD
15
RST
22
CS
10
SCLK
3
SI
4
SO
9
+
10 µA
25 µA
+
10 µA
Fault Timers
10 µA +
10 µA
Serial D/O
Line Driver
VPWR 21
Over
Voltage
Voltage
Regulator
OVD
VDD
RB
SFPD
SFL
CS
SCLK
SI
SO
CSI
CSBI
GE
OT
SF
OF
SPI
Interface
Logic
Bias
Gate
Control
Open
Load
Detect
Short
Circuit
Detect
53 V
To Gates
1 to 7
lLimit
+
RS
Over
Temperature
Detect
From Detectors 1 to 7
Figure 1. 33291 Simplified Block Diagram
Output 0
24
Outputs 1 to 7
2
11 - 14
23
Grounds 5-8
17-20
FAULT OPERATION
Serial Output (SO) Pin Reports
Over Voltage
Over voltage condition reported
Over Temperature
Fault reported by Serial Output (SO) pin
Over Current
SO pin reports short to battery/supply or over current condition
Output ON, Open Load Fault Not reported
Output OFF, Open Load Fault SO pin reports output OFF open load condition
Device Shutdowns
Over Voltage
Total device shutdown at VPWR = 28 to 36 V. All outputs are latched off while the SPI register is reset (cleared).
Outputs can be turned back on with a new SPI command after VPWR has decayed below 26.5 V.
Over Temperature
Only the output experiencing an over temperature condition turns OFF.
Over Current
Only the output experiencing an over current shuts down at 1.0 to 3.0 A after a 70 to 250 µs delay, with SFPD pin
grounded. All other outputs will continue to operate in a current limit mode, with no shutdown, if the SFPD pin is at
5.0 V (so long as the individual outputs are not experiencing thermal limit conditions).
33291
2
For More Information OMnOTTOhRiOsLAPrAoNdALuOcGt,INTEGRATED CIRCUIT DEVICE DATA
Go to: www.freescale.com


Part Number MC33291
Description Eight Output Switch with Serial Peripheral Interface I/O
Maker Motorola
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MC33291 Datasheet PDF






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