TLE7189QK Infineon Technologies, TLE7189QK Datasheet - Page 22

• Manufacturer Part Number: TLE7189QK
• Description: IC DRIVER 3PH BRIDGE 64LQFP
• Manufacturer: Infineon Technologies

Specifications of TLE7189QK

• Applications: DC Motor Driver, 3 Phase
• Number Of Outputs: 1
• Voltage - Supply: 5.5 V ~ 20 V
• Operating Temperature: -40°C ~ 150°C
• Mounting Type: Surface Mount
• Package / Case: 64-LQFP Exposed Pad, 64-eLQFP, 64-HLQFP
• Packages: PG-LQFP-64
• 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: -

5.3
The TLE7189QK incorporates three fast and precise operational amplifiers for conditioning and amplification of
the shunt signals sensed in the three phases. Additionally, one reference bias buffer is integrated to provide an
adjustable bias reference for the three OpAmps. The voltage divider on the VRI pin should be less than 50 kΩ, the
filtering capacitor less than 1.2 µF - if needed at all. The gain of the OpAmps is adjustable by external resistors
within a range of 5 to 15.
When
from an external voltage regulator for the ADC used to read the current sense signal. The additional buffer allows
bi-directional current sensing and permits the adaptation of the reference bias to different µC I/O voltages. The
reference buffer assures a stable reference voltage even in the high frequency range.
The reference bias buffer is used for all of the OpAmps. The OpAmps of the TLE7189QK demonstrate low offset
voltages and very little drift over temperature, thus allowing accurate phase current measurements.
Figure 4
Data Sheet
V
ISP
=
Shunt Signal Conditioning
Shunt Signal Conditioning Block Diagram
V
ISN
, VO provides the reference voltage
requirements additional
TLE7189
customer specific
filtering can be
Dependent on
necessary
C
R
VRI
VRI
< 1.2 µF (if needed)
< 50 kOhm
VO3
1k
to ADCs
VO2
1k
VO1
V
Reference
VRO
+
22
-
Bias
.
I-DC Link
I-DC Link
I-DC Link
OpAmp1
OpAmp2
OpAmp3
V
VRO
+
+
+
-
-
-
is normally half of the regulated voltage provided
ISN2
ISP1
ISN1
ISP2
Rfb
ISN3
VRI
ISP3
VRO
Rfb
Rfb
R
R
VRI
VRI
Rfb
Rs
Rs
Rs
Rs
3.3V
C
Rs
Rs
VRI
Adjustable
reference
bias
Shunt
Rev. 2.0, 2009-07-10
TLE7189QK