Q67000-A9295 Ver la hoja de datos (PDF) - Infineon Technologies
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Q67000-A9295 Datasheet PDF : 16 Pages
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TLE 5207
Circuit Description
Input Circuit
The control inputs consist of TTL/CMOS-compatible Schmitt triggers with hysteresis.
Buffer amplifiers are driven by these stages and convert the logic signal into the
necessary form for driving the power output stages.In case of low potential at both inputs
the device is switched in inhibit-condition with very low current consumption.
Output Stages
The output stages from a switched H-bridge. Protective circuits make the outputs short-
circuit proof from ground up to a supply voltage of 16 V. Positive and negative voltage
spikes, which occur when switching inductive loads, are limited by integrated power
diodes.
Monitoring and Protective Functions
An internal circuit ensures that all output transistors are turned-OFF if the supply voltage
is below the operating range.
Functional Truth Table
I1
I2 Q1 Q2
L
L ZZ
L
HLH
H
L HL
H
H HH
Comments
Device in inhibit condition with very low current
consumption; outputs in tristate condition (high impedance)
Motor turns clockwise
Motor turns counterclockwise
Motor brake; both high side transistors turned-ON
Notes for Output Stage
Symbol Value
L
Low side transistor is turned-ON; High side transistor is turned-OFF
H
High side transistor is turned-ON; Low side transistor is turned-OFF
Z
High side transistor and Low side transistor are turned-OFF
A monitoring circuit for each output transistor detects whether the particular transistor is
active and in this case prevents the corresponding source transistor (sink transistor) from
conducting in sink operation (source operation). This effectively guards against
crossover currents. Pulse-width operation is possible up to a maximum switching
frequency of 1 kHz for any load.
Depending on the load current higher frequencies are possible.
Semiconductor Group
3
1998-02-01
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