5-A DC Motor Driver with Inhibit
TLE 5207
Overview
Features
•
•
•
•
•
•
•
Output current
±
4 A (peak 5 A)
Inhibit with very low quiescent current (typ. 20
µA)
I/O error diagnostics
Short-circuit proof
Four-quadrant operation
Integrated free-wheeling diodes
Wide temperature range
P-TO220-7-1
P-TO220-7-8
Type
TLE 5207
TLE 5207G
Description
Ordering Code
Q67000-A9295
Q67006-A9296
Package
P-TO220-7-1
P-TO220-7-8
TLE 5207 is an integrated power bridge with inhibit feature and DMOS output stages for
driving DC motors.
This motor bridge is optimized for driving DC motors in reversible operation. The internal
protective circuitry in particular ensures that no crossover currents can occur.
Because the free-wheeling diodes are integrated, the external circuitry that is necessary
is restricted to the capacitors on the supply voltage.
The two control inputs have TTL/CMOS-compatible levels.
Semiconductor Group
1
1998-02-01
TLE 5207
TLE 5207
TLE 5207G
1
2
3 4 5
6
7
EF
Q1
Ι
1
GND
Ι
2
V
S
Q2
AEP01224
Figure 1
Pin Configuration
(top view)
Pin Definitions and Functions
Pin
1
2
3
4
5
6
7
Symbol Function
Q1
EF
I1
GND
I2
Output of channel 1;
short-circuit proof, free-wheeling diodes
integrated for inductive loads
Error flag;
TTL/CMOS-compatible output for error detection
(open drain)
Control input 1;
TTL/CMOS-compatible
Ground;
connected internally to cooling fin
Control input 2;
TTL/CMOS-compatible
Supply voltage;
wire with capacitor matching load
Output of channel 2;
Short-circuit proof, free-wheeling diodes
integrated for inductive loads
V
S
Q2
Semiconductor Group
2
1998-02-01
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
L
L
H
H
I2
L
H
L
H
Q1
Z
L
H
H
Q2
Z
H
L
H
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
L
H
Z
Value
Low side transistor is turned-ON; High side transistor is turned-OFF
High side transistor is turned-ON; Low side transistor is turned-OFF
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
TLE 5207
Protective Function
Various errors like short-circuit to +
V
S
, ground or across the load are detected. All faults
result in turn-OFF of the output stages after a delay of 40
µs
and setting of the error flag
EF to ground. Changing the inputs resets the error flag.
Output Shorted to Ground Detection
If a high side transistor is switched on and its output is shorted to ground, the output
current is limited to typ 11 A. After a delay of 40
µs
all outputs will be switched off and
the error flag EF is set to ground.
Output Shorted to
+
V
S
and Overload Detection
An internal circuit detects if the current through the low side transistor is higher than 4 A
typ. In this case all outputs are turned-OFF after 40
µs
and the error flag is set to ground.
At a junction temperature higher than 160
°C
the thermal shutdown turns-OFF, all four
output stages commonly and the error flag is set without a delay.
Diagnosis
Input
I1
L
L
H
H
I2
L
H
L
H
Z
L
H
H
Output
Q1
Q2
Z
H
L
H
Shorted to GND
Q1, Q2
Q2
Q1
Q1, Q2
Diagnosis
Shorted to
V
S
Overload
Q1, Q2
Q1
Q2
–
–
X
X
–
H
L
L
L
EF
Semiconductor Group
4
1998-02-01
TLE 5207
Error Flag
2
Error
Flag
Protection
Circuit 1
V
S
6
Control Input 1
3
1
Output 1
Control Input 2
5
7
Output 2
Protection
Circuit 1
4
GND
AEB01225
Figure 2
Block Diagram
Semiconductor Group
5
1998-02-01
51单片机
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