mc33091ap Freescale Semiconductor, Inc, mc33091ap Datasheet

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mc33091ap

Manufacturer Part Number
mc33091ap
Description
High-side Tmos Driver
Manufacturer
Freescale Semiconductor, Inc
Datasheet

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MC33091AP
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High-Side TMOS Driver
automotive switching applications requiring the capability of handling high
voltages attributed to load and field dump transients, as well as reverse and
double battery conditions. Few external components are required to drive a
wide variety of N–Channel TMOS devices. The MC33091A, driving an
appropriate TMOS device, offers economical system solutions for high–side
switching large currents. The MC33091A has CMOS compatible input
control, charge pump to drive the TMOS power transistor, basic fault
detection circuit, V DS monitoring circuit used to detect a shorted TMOS load,
and overcurrent protection timer with associated current squaring circuitry.
to current converter drive an externally programmable integrator circuit. This
circuit affords fast detection of a shorted load while allowing difficult loads,
such as lamps having high in–rush currents, additional time to turn on.
requiring a single pull–up resistor for operation. A fault is reported whenever
the MOSFET on–current exceeds an externally programmed set level.
the plastic 8–Pin surface mount package.
MOTOROLA ANALOG IC DEVICE DATA
The MC33091A is a High–Side TMOS Driver designed for use in harsh
Short circuit protection is made possible by having a unique V DS voltage
The Fault output is comprised of an open collector NPN transistor
The MC33091A is available in the plastic 8–Pin DIP package as well as
Designed for Automotive High–Side Driver Applications
Works with a Wide Variety of N–Channel Power MOSFETs
Drives Inductive Loads with No External Clamp Circuitry Required
CMOS Logic Compatible Input Control
On–Board Charge Pump with No External Components Required
Shorted Load Detection and Protection
Forward Overvoltage and Reverse Battery Protection
Load and Field Dump Protection
Extended Operating Temperature Range
Fault Output to Report a MOSFET Overcurrent Condition
Input
Fault
7
6
MC33091A
+
3
Gnd
This device contains 54 active transistors.
Q
Q R
S
Simplified Block Diagram
R T
Squaring
Current
2
Circuit
8
R X
DRN
I SQ
V T
Overvoltage
+
+
Shutdown
C T
Charge
C S
Pump
+
R S
5
V CC
Gate
4
SRC
1
Load
+V S
Motorola, Inc. 1996
MC33091AD
MC33091AP
Device
SRC
DRN
Gate
ORDERING INFORMATION
Gnd
MC33091A
Order this document by MC33091A/D
PIN CONNECTIONS
TMOS DRIVER
SEMICONDUCTOR
TECHNICAL DATA
PLASTIC PACKAGE
PLASTIC PACKAGE
1
2
3
4
Temperature Range
T A = – 40 to +125 C
HIGH–SIDE
8
CASE 626
D SUFFIX
CASE 751
P SUFFIX
Operating
(Top View)
8
(SO–8)
1
1
8
7
6
5
V T
Input
Fault
V CC
Plastic DIP
Package
SO–8
Rev 0
1

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mc33091ap Summary of contents

Page 1

... MOTOROLA ANALOG IC DEVICE DATA + Charge Pump Gate 4 SRC 1 + Load Device MC33091AD MC33091AP Motorola, Inc. 1996 Order this document by MC33091A/D MC33091A HIGH–SIDE TMOS DRIVER SEMICONDUCTOR TECHNICAL DATA SUFFIX PLASTIC PACKAGE CASE 626 SUFFIX PLASTIC PACKAGE CASE 751 (SO– ...

Page 2

MAXIMUM RATINGS Rating Supply Voltage (Pin 5) (Note 1) Continuous (Without Activating Clamp) Continuous Supply Clamp Current (Pin 5) DIP Package (Case 626) SO–8 Package (Case 751) Input Control Voltage Range (Pin 7) Continuous Fault Pull–Up Voltage Range (Pin 6) ...

Page 3

ELECTRICAL CHARACTERISTICS (Values are noted under conditions of 7.0 V noted. Typical values reflect approximate mean time of device characterization.) Characteristics Supply Current (Note ...

Page 4

Figure 4. Input Control Current versus Input Control Voltage 160 140 120 100 1.0 2.0 3.0 4 INPUT CONTROL VOLTAGE (V) ...

Page 5

Figure 10. Timer Upper Threshold Voltage versus Temperature 4. 7.0 V 4. 5 Increasing causing ...

Page 6

Figure 16. Gate Voltage versus Supply Voltage 1. – 1.05 1. (Gate “off”) 0.95 0.90 0. 125 C 0.80 6 ...

Page 7

Figure 22. Drain–to–Source Voltage versus External R T Timer Resistor 7.0 V DS(min 100 4 100 A ...

Page 8

Figure 28. Descriptive Waveform Diagram +V CC (Pin 5) Input (Pin 7) Gate (Pin (Pin 8) Fault (Pin 6) SRC (Pin 1) DRN (Pin 2) Normal Operation 8 MC33091A Shorted FET ...

Page 9

Introduction The MC33091A is designed to drive a wide variety of N–channel TMOS transistors in high–side configured, low frequency switching applications. The MC33091A has an internal charge pump to fully enhance the on–state of the TMOS device. The MC33091A protects ...

Page 10

internal current source parameter of the MC33091A that has a nominal value of 100 A and the external resistor in series with the drain of the TMOS device that establishes the value of ...

Page 11

The data sheet for the particular TMOS device being used will normally reveal the current value, I DS(max expected under a dead short condition. TMOS data sheets normally depict graphs of drain current versus drain to source ...

Page 12

The following design approach will simplify application of the MC33091A and will insure the components chosen to be optimal for a specific application. 1. Characterize the load impedance and determine the maximum load current possible for the load supply voltage ...

Page 13

Calculate the shorted load average power dissipation for the application using Equations 8 and 9. This involves determining the peak shorted load power dissipation of the TMOS device and gate duty cycle. The duty cycle is based on V ...

Page 14

Figure 31. Slow Down FET Turn–On Charge Pump Gate 4 SRC 1 + Figure 33. Slow Down Turn–On and Turn–Off of FET Charge Pump Gate 4 SRC 1 + Figure 35. Decreased FET Turn–Off Time with Inductive Flyback Voltage Clamp ...

Page 15

F –A– NOTE 2 C –T– N SEATING PLANE 0.13 (0.005) M –A– –B– 0.25 (0.010 SEATING –T– PLANE 0.25 (0.010) ...

Page 16

Motorola reserves the right to make changes without further notice to any products herein. Motorola makes no warranty, representation or guarantee regarding the suitability of its products for any particular purpose, nor does Motorola assume any liability arising out of ...

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