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PDF MC33293A Data sheet ( Hoja de datos )
| Número de pieza | MC33293A | |
| Descripción | QUAD LOW SIDE SWITCH | |
| Fabricantes | Motorola Semiconductors | |
| Logotipo |  |
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Advance Information
Quad Low Side Switch
The MC33293A is a single monolithic integrated circuit designed for quad
low side switching applications. This device was initially conceived as a quad
injector driver for use in the harsh automotive environment but is well suited
for many other applications. The MC33293A incorporates SMARTMOS™
technology having CMOS logic, bipolar and CMOS analog circuitry and
DMOS power MOSFETs. All of the device inputs are CMOS compatible. The
four output devices are N-channel power MOSFETs. A Fault detect output is
provided to flag the existence of open loads (outputs ON or OFF) or shorted
loads. If a short circuit is detected, the fault detect circuitry turns off the
shorted output, but allows the others to function normally. An overvoltage
(VPWR) condition will turn off all outputs for the overvoltage duration. Each
output functions independently and has a drain-to-gate diode clamp for
inductive flyback voltage protection. A Single/Dual select pin is incorporated
to allow either individual output control or control of a pair of outputs from one
input.
The MC33293A is parametrically specified over – 40°C ≤ TA ≤ 125°C
ambient temperature and a 9.0 V ≤ VPWR ≤ 14.5 V supply.
• Designed to Operate with Supply Voltages of 5.5 V to 30 V
• CMOS Compatible Inputs with Active Pull-Downs
• Maximum 5.0 mA Quiescent Current
• RDS(on) of 0.25 Ω Maximum at 25°C, with VPWR ≥ 9.0 V
• Each Output Clamped to 65 V for Driving Inductive Loads
• Each Output Current Limited at 3.0 A to handle Incandescent
Lamp Loads
• Active Low Output Fault Status with Interrogation Capability
• Open Load Detection (Output ON or OFF)
• Capable of Withstanding Reverse Battery
• Overvoltage Shutdown
• Short Circuit Detection and Shutdown with Automatic Retry
MC33293A
QUAD LOW SIDE SWITCH
(RDS(on) = 0.25 Ω Max per Output)
SEMICONDUCTOR
TECHNICAL DATA
1
T SUFFIX
PLASTIC PACKAGE
CASE 821D
1
TV SUFFIX
PLASTIC PACKAGE
CASE 821C
Device
MC33293AT
MC33293ATV
ORDERING INFORMATION
Operating
Temperature Range
TJ = –40° to +150°C
Package
15 Pin SIP
PIN CONNECTIONS
Pin 1. Output 2
2. Output 1
3. Input 1
4. Input 2
5. Input 1 & 2
6. Single/Dual
7. VPWR
8. Gnd
9. N/C
10.Fault
11. Input 3 & 4
12.Input 4
13.Input 3
14.Output 3
15.Output 4
This document contains information on a new product. Specifications and information herein
arMe sOubTjeOctRtoOcLhaAngAe NwiAthLouOt nGotiIcCe. DEVICE DATA
© Motorola, Inc. 1996
Rev 0
1
1 page  
MC33293A
Figure 1. Fuel Injector Application Block Diagram
MC68HC11A1
VLoad +14V
(Battery)
Input 1
OC 2
3
Input 2
OC 3
4
Input 3
OC 4
13
Input 4
OC 5
12
Input 1 & 2
PD 0
5
Select
PD 1
6
Input 3 & 4
PD 2
11
IRQ
11µA x 7
Fault
10
100µA
Fault
Encoder
7
Overvoltage
Shutdown
Bias
Circuit
Bias
23µA
Gate
Control
Open
Load
Detect
Short
Circuit
Detect
G2
G3
G4
ILimit
RS
23µA
Open
Load
Detect
Short
Circuit
Detect
G2
ILimit
RS
23µA
Open
Load
Detect
Short
Circuit
Detect
G3
ILimit
RS
23µA
Open
Load
Detect
Short
Circuit
Detect
G4
ILimit
RS
MOTOROLA ANALOG IC DEVICE DATA
Injector 1
(14Ω, 10mH) (1)
2
Injector 2
(14Ω, 10mH) (1)
1
Injector 3
(14Ω, 10mH) (1)
14
Injector 4
(14Ω, 10mH) (1)
15
NOTE: 1. The MC33293A
is also designed to drive
the 194 type incandescent
instrument lamp.
8
5
5 Page 
MC33293A
When the Single/Dual Select pin is held at a logic high
state, Control Inputs 1, 2, 3 and 4 are turned OFF and can not
exercise any control over the outputs. In this mode, input
control transfers from a single to a dual mode of operation,
wherein only Input 1 & 2 and Input 3 & 4 have control of
Output 1 plus Output 2, and Output 3 plus Output 4,
respectively. Hence the term “Dual Select” mode of
operation.
Paralleling Outputs
Paralleling outputs may be desirable in the event the
application requires a lower RDS(on) or higher current
switching capability than a single output. The MC33293A can
be operated with all outputs (and therefore all inputs) tied
together but modified operation is to be expected. With all
inputs tied together and depending on the dual or single
select mode used, the paralleled input control current will
either be twice (with the dual mode selected) or four times
(with the single mode selected) that of any single input. Other
expected differences are: RDS(on) will decrease by a factor of
four while the Output-On Open-Load Detect current and the
Output Limiting current will increase by a factor of four. There
will be no change in the Over-Voltage Shutdown Range or
the Output-Off Output-On Open-Load Detect Threshold
Voltage Range. As always, system level thermal design and
verification are important when outputs are paralleled.
FAULT LOGIC OPERATION
General
The Fault Status output (Pin 10) on the MC33293A reports
any one of three possible faults from any one of the four
outputs. The three possible faults are output-on open-load
Fault, output-off open-load Fault and over-current Fault. All
faults from any of the four outputs are OR’d together and
reported by the single Fault Status output-on Pin 10
(Figure 13).
Figure 13. MC33293A Fault Logic Diagram
Output-Off open-load Fault Report 1
Output-Off open-load Fault Report 2
Output-Off open-load Fault Report 3
Output-Off open-load Fault Report 4
100µA
Input 1
Input 2
Fault
Input 3
Input 4
Single/Dual Select
Input 1 & 2
Input 3 & 4
output-on open-load Fault Report 1
output-on open-load Fault Report 2
output-on open-load Fault Report 3
output-on open-load Fault Report 4
output-on Over-Current Fault Report 1
output-on Over-Current Fault Report 2
output-on Over-Current Fault Report 3
output-on Over-Current Fault Report 4
MOTOROLA ANALOG IC DEVICE DATA
11
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| Páginas | Total 16 Páginas | |
| PDF Descargar | [ Datasheet MC33293A.PDF ] | |
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