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TLE5205-2
5 A H-Bridge for DC Motor Applications
built using the Infineon multi-technology process SPT® which allows bipolar and CMOS
control circuitry plus DMOS power devices to exist on the same monolithic structure.
Operation modes forward (cw), reverse (ccw), brake and high impedance are invoked
from just two control pins with TTL/CMOS compatible levels. The combination of an
extremely low RDSON and the use of a power IC package with low thermal resistance and
high thermal capacity helps to minimize system power dissipation. A blocking capacitor
at the supply voltage is the only external circuitry due to the integrated freewheeling
diodes.
1Overview
1.1FeaturesDelivers up to 5A continuous 6Apeak currentOptimized for DC motor management applicationsOperates at supply voltages up to 40 V
•Very low RDSON; typ. 200 mW @25°C per switchOutput full short circuit protectedOvertemperature protection with hysteresis
and diagnosisShort circuit and open load diagnosis
with open drain error flagUndervoltage lockoutCMOS/TTL compatible inputs with hysteresisNo crossover currentInternal freewheeling diodesWide temperature range; -40°C < Tj < 150°C
DescriptionThe TLE5205-2 is an integrated power H-bridge with
DMOS output stages for driving DC-Motors. The part is
5-A H-Bridge for DC-Motor ApplicationsTLE5205-2 Overview
1.2 Pin Configuration (top view)
Figure1 Overview
1.3Pin Definitions and Functions
Overview
1.4Functional Block Diagram
Figure2Block Diagram
Overview
1.5Circuit Description
Input CircuitThe control inputs consist of TTL/CMOS-compatible schmitt-triggers with hysteresis.
Buffer amplifiers are driven by this stages.
Output StagesThe output stages consist of a DMOS H-bridge. Integrated circuits protect the outputs
against short-circuit to ground and to the supply voltage. Positive and negative voltage
spikes, which occur when switching inductive loads, are limited by integrated
freewheeling diodes.
A monitoring circuit for each output transistor detects whether the particular transitor is
active and in this case prevents the corresponding source transistor (sink transistor)
from conducting in sink operation (source operation). Therefore no crossover currents
can occur.
1.6Input Logic Truth Table
Functional Truth Table
Notes for Output Stage
Overview
1.7Monitoring FunctionsUndervoltage lockout (UVLO):
When VS reaches the switch on voltage VSON the IC becomes active with a hysteresis.
All output transistors are switched off if the supply voltage VS drops below the switch off
value VSOFF.
1.8Protective FunctionVarious errors like short-circuit to +VS, ground or across the load are detected. All faults
result in turn-OFF of the output stages after a delay of 50ms and setting of the error flag
EF to ground. Changing the inputs resets the error flag.
Output Shorted to Ground DetectionIf a high side transistor is switched on and its output is shorted to ground, the output
current is internally limited. After a delay of 50 ms all outputs will be switched-OFF and
the error flag is set.
Output Shorted to + VS DetectionIf a low side transistor is switched on and its output is shorted to the supply voltage,
the output current is internally limited. After a delay of 50 ms all outputs will be
switched-OFF and the error flag is set.
Overload DetectionAn internal circuit detects if the current through the low side transistor exceeds the
trippoint ISDL. In this case all outputs are turned off after 50 ms and the error flag is set.
Overtemperature ProtectionAt a junction temperature higher than 150 °C the thermal shutdown turns-OFF, all four
output stages commonly and the error flag is set with a delay.
Open Load DetectionThe output Q1 has a 10 kW pull-up resistor and the output Q2 has a 10 kW pull-down
resistor. If E1 and E2 are high, all output power stages are turned-OFF. In case of no
load between Q1 and Q2 the output voltage Q1 is VS and Q2 is ground. This state will
be detected by two comparators and an error flag will be set after a delay time ofms. Changing the inputs resets the error flip flop.
Overview
Figure3Simplified Schematic for Open Load Detection
DiagnosisDiagnosisVarious errors as listed in the table “Diagnosis” are detected. Short circuits and overload
result in turning off the output stages after a delay tdSD and setting the error flag
simultaneously [EF=L]. Changing the inputs to a state where the fault is not detectable
resets the error flag (input toggling) with the exception of short circuit from OUT1 to
OUT2 (load short circuit).
IN:0 = Logic LOW
1 = Logic HIGH
OUT:Z = Output in tristate condition
= VS /2 due to internal Pull-up/down resistors
EF:1 = No error
0 = Error
L = Output in sink condition
H = Output in source condition
Electrical CharacteristicsElectrical CharacteristicsNote:Maximum ratings are absolute ratings; exceeding any one of these values may
cause irreversible damage to the integrated circuit.
3.1Absolute Maximum Ratings– 40 °C < Tj < 150 °C
Voltages
Currents of DMOS-Transistors and Freewheeling Diodes
Temperatures
Thermal Resistances
Electrical Characteristics
3.2Operating Range
3.3Electrical Characteristics6 V < VS < 18 V; IN1 = IN2 = HIGHOUT1,2 = 0 A (No load); – 40 °C < Tj < 150 °C; unless otherwise specified
Current Consumption
Under Voltage Lockout
Electrical Characteristics
Outputs OUT1, 2
Static Drain-Source-On ResistanceNote:Values of RDS ON for VS ON
Overcurrent
3.3Electrical Characteristics (cont’d)
6 V < VS < 18 V; IN1 = IN2 = HIGHOUT1,2 = 0 A (No load); – 40 °C < Tj < 150 °C; unless otherwise specified
Electrical Characteristics
Short Circuit Current Limitation
Open Circuit
Output Delay Times (Device Active for t > 1 ms)
3.3Electrical Characteristics (cont’d)
6 V < VS < 18 V; IN1 = IN2 = HIGHOUT1,2 = 0 A (No load); – 40 °C < Tj < 150 °C; unless otherwise specified
