TLE7189F Infineon Technologies, TLE7189F Datasheet - Page 17

• Manufacturer Part Number: TLE7189F
• Description: IC DRIVER 3PH BRIDGE 48-VQFN
• Manufacturer: Infineon Technologies
• Type: High Side/Low Sider

Specifications of TLE7189F

• Applications: DC Motor Driver, 3 Phase
• Number Of Outputs: 1
• Voltage - Supply: 5.5 V ~ 28 V
• Operating Temperature: -40°C ~ 150°C
• Mounting Type: Surface Mount
• Package / Case: 48-VFQFN
• Rise Time: 400 ns
• Fall Time: 230 ns
• Supply Voltage (min): 5.5 V
• Supply Current: 110 mA
• Maximum Operating Temperature: + 150 C
• Mounting Style: SMD/SMT
• Bridge Type: 3-Phase Bridge
• Minimum Operating Temperature: - 40 C
• Number Of Drivers: 3
• Packages: PG-VQFN-48
• Operating Range: 5.5 - 28.0 V
• Iq: 30 ?A
• Turn On/off Current: 1.5/ 1.5 A
• D.c.-range @ 20khz: 0...100%
• Numbers Of Integrated Opamps For Load Current Measurement: 3.0
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Current - Output: -
• Voltage - Load: -
• Lead Free Status / Rohs Status: Lead free / RoHS Compliant
• Other names: SP000248208; TLE7189F; TLE7189FINTR

5.2
5.2.1
The TLE7189F provides a short circuit protection for the external MOSFETs. It is a monitoring of the drain-source
voltage of the external MOSFETs. As soon as this voltage is higher than the short circuit detection limit, a capacitor
will be charged. The high side and the low side output stage of the same half bridge use the same capacitor (see
Figure 3
charging current. This charging and discharging ratio is specified with the help of duty cycle where a short is
detected or not detected.
After a delay of about 12µs all external MOSFETs will be switched off until the driver is reset by the ENA pin. The
error flag is set.
The drain-source voltage monitoring of the short circuit detection for a certain external MOSFET is active as soon
as the corresponding input is set to "on" and the dead time is expired.
The short circuit detection level is adjustable in an analogue manner by the voltage setting at the SCDL pin. There
is a 1:1 translation between the voltage applied to the SCDL pin and the drain-source voltage limit. E.g. to trigger
the SCD circuit at 1V drain-source voltage, the SCDL pin must be set to 1V as well. The drain-source voltage limit
can be chosen between 0.7 ... 2.5V.
If the SCDL pin is left open, the short circuit detection level will be set internally to a specified value. In case SCDL
is connected to GND the detection level is low. If SCDL is connected to 3.3V, the detection level is about 3.2V.
In the TLE7189F the short circuit detection functionality can be tested by setting the SCDL pin to voltages lower
than 0.4V, switching off the low side MOSFETs and switching on one or more high side MOSFETs. In this test, a
short circuit will be detected even without current in the external MOSFET (VDH-SHx > V
This test function can be used as well to detect an open VDH pin. If VDH is open during this test, no SCD error
will be reported.
A setting of 5V at the SCDL pin will disable the short circuit protection function.
5.2.2
In bridge applications it has to be assured that the external high side and low side MOSFETs are not "on" at the
same time, connecting directly the battery voltage to GND. The dead time generated in the TLE7189F is fixed to
a minimum value. This function assures a minimum dead time if the input signals coming from the µC are faulty.
The exact dead time of the bridge is usually controlled by the PWM generation unit of the µC.
In addition to this dead time, the TLE7189F provides a locking mechanism, avoiding that both external MOSFETs
of one half bridge can be switched on at the same time. This functionality is called shoot through protection.
If the command to switch on both high and low side switches in the same half bridge is given at the input pins, the
command will be ignored. The conflicting input signals will not generate an error message.
5.2.3
The TLE7189F has an integrated under voltage shut down, to assure that the behavior of the device is predictable
in all voltage ranges.
If the voltage of a charge pump buffer capacitors CBx reaches the under voltage shut down level for a minimum
specified filter time, the gate-source voltage of all external MOSFETs will be actively pulled to low. In this situation
the short circuit detection of this output stage is deactivated to avoid a latching shut down of the driver.
As soon as the charge pump buffer voltage recovers, the output stage condition will be aligned to the input patterns
automatically.This allows to continue operation of the motor in case of under voltage shut down without a reset by
the µC.
Data Sheet
). This capacitor is discharged permanently with a current which is about 2 times smaller than the
Protection and Diagnostic Functions
Short Circuit Protection
Dead Time and Shoot Through Protection
Under Voltage Shut Down
17
TSCD1
Rev. 2.1, 2007-05-30
).
TLE7189F