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reference designLM68635 | Demoboard TIDA-010281

Texas Instruments LM68635 | Demoboard TIDA-010281

mmWave radar sensing reference design for safer robot perception

Overview

TopologyBuck Converter
Input voltage3-70 V
Output 140 V / 4.5 A
IC revisionDecember 2025

Description

This reference design features a safety millimeter- wave (mmWave) radar sensor (IWR6843AOP) and safety power management integrated circuit (PMIC) (LP87745) to enable safe perception in robotics and industrial automation applications. The design supports Q&A watchdog communication, level or PWM error signal monitoring (ESM), safety diagnostics, and radar reset functions for autonomous mobile robots (AMRs), automated guided vehicles (AGVs), humanoids, industrial robots, and collaborative robots.

Features

Functional safety compliant radar with hardware integrity level up to SIL-2 and systematic capability of SIL-3Functional safety compliant PMIC with hardware integrity level up to SIL-2 and systematic capability of SIL-3Software support for watchdog communication between PMIC and radarProvides test results for:Radar performance with the safety PMICQ&A watchdog functionality from the PMICLevel or PWM error signal monitoring (ESM)Safety diagnostics and radar reset

Typical applications

  • Battery powered motion detector
  • Mobile robot radar
  • Industrial robot radar
  • Occupancy detection (people tracking, people counting)
  • Humanoid robot sensor module

More information

Parts approved by Texas Instruments

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Order Code
Data­sheet
Simu­lation
Downloads
Status
Product series
C
Tol. C
VR(V (DC))
Size
Operating Temperature
DF(%)
RISO
Ceramic Type
L(mm)
W(mm)
H(mm)
Fl(mm)
Packaging
L(µH)
IRP,40K(A)
ISAT,30%(A)
RDC typ.(mΩ)
fres(MHz)
VOP(V)
Mount
SamplesAvailability & Sample
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885012106005
SPECWCAP-CSGP MLCCs 6.3 V(DC), 4.7 µF, ±20%
Simu­lation
Availability
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Downloads8 files

Status
ActiveProduction is active. Expected lifetime: >10 years.
iProduction is active. Expected lifetime: >10 years.
Product seriesWCAP-CSGP MLCCs 6.3 V(DC)
Capacitance4.7 µF
Capacitance±20% 
Rated Voltage6.3 V (DC)
Size0603 
Operating Temperature -55 °C up to +85 °C
Dissipation Factor10 %
Insulation Resistance0.02 GΩ
Ceramic TypeX5R Class II 
Length1.6 mm
Width0.8 mm
Height0.8 mm
Pad Dimension0.4 mm
Packaging7" Tape & Reel 
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74438366010
SPECWE-MAPI SMT Power Inductor, –, –
Simu­lation
Availability
–
Downloads9 files

Status
ActiveProduction is active. Expected lifetime: >10 years.
iProduction is active. Expected lifetime: >10 years.
Product seriesWE-MAPI SMT Power Inductor
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Size5020 
Operating Temperature -40 °C up to +125 °C
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Length5.6 mm
Width5.6 mm
Height2.1 mm
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Inductance1 µH
Performance Rated Current11.1 A
Saturation Current @ 30%14 A
DC Resistance11.4 mΩ
Self Resonant Frequency50 MHz
Operating Voltage80 V
MountSMT 
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Additional parts recommended by Würth Elektronik

Recommended parts are Würth Elektronik alternatives that are not formally approved for this reference design. Please verify it is suitable for your application, and contact us if you have any questions.

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Order Code
Data­sheet
Simu­lation
Downloads
Status
Product series
L(µH)
IRP,40K(A)
ISAT,10%(A)
ISAT,30%(A)
RDC max.(mΩ)
fres(MHz)
RDC typ.(mΩ)
VOP(V)
Mount
Type/Size
SamplesAvailability & Sample
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74479276147
SPECWE-PMCI Power Molded Chip Inductor, 0.47 µH, 5.4 A
Simu­lation
Availability
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Downloads9 files

Status
ActiveProduction is active. Expected lifetime: >10 years.
iProduction is active. Expected lifetime: >10 years.
Product seriesWE-PMCI Power Molded Chip Inductor
Inductance0.47 µH
Performance Rated Current5.4 A
Saturation Current @ 10%2.95 A
Saturation Current @ 30%6.3 A
DC Resistance30 mΩ
Self Resonant Frequency165 MHz
DC Resistance26 mΩ
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MountSMT 
Type/Size201610 
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74479320165147
SPECWE-PMFI Power Molded Flatwire Inductor, 0.47 µH, 6.2 A
Simu­lation
Availability
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Downloads9 files

Status
ActiveProduction is active. Expected lifetime: >10 years.
iProduction is active. Expected lifetime: >10 years.
Product seriesWE-PMFI Power Molded Flatwire Inductor
Inductance0.47 µH
Performance Rated Current6.2 A
Saturation Current @ 10%3.85 A
Saturation Current @ 30%7.5 A
DC Resistance22 mΩ
Self Resonant Frequency100 MHz
DC Resistance18.4 mΩ
Operating Voltage48 V
MountSMD/SMT Soldering 
Type/Size201610 
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74438343015
SPECWE-MAPI SMT Power Inductor, 1.5 µH, 2.05 A
Simu­lation
Availability
–
Downloads9 files

Status
ActiveProduction is active. Expected lifetime: >10 years.
iProduction is active. Expected lifetime: >10 years.
Product seriesWE-MAPI SMT Power Inductor
Inductance1.5 µH
Performance Rated Current2.05 A
Saturation Current @ 10%2 A
Saturation Current @ 30%3.95 A
DC Resistance180 mΩ
Self Resonant Frequency85 MHz
DC Resistance150 mΩ
Operating Voltage80 V
MountSMT 
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–Check availability
74438357015
SPECWE-MAPI SMT Power Inductor, 1.5 µH, 8.2 A
Simu­lation
Availability
–
Downloads9 files

Status
ActiveProduction is active. Expected lifetime: >10 years.
iProduction is active. Expected lifetime: >10 years.
Product seriesWE-MAPI SMT Power Inductor
Inductance1.5 µH
Performance Rated Current8.2 A
Saturation Current @ 10%5.55 A
Saturation Current @ 30%11 A
DC Resistance20 mΩ
Self Resonant Frequency48 MHz
DC Resistance17.1 mΩ
Operating Voltage80 V
MountSMT 
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–Check availability
7443844020015
SPECWE-MXGI SMT Power Inductor, 1.5 µH, 10.3 A
Simu­lation
Availability
–
Downloads9 files

Status
ActiveProduction is active. Expected lifetime: >10 years.
iProduction is active. Expected lifetime: >10 years.
Product seriesWE-MXGI SMT Power Inductor
Inductance1.5 µH
Performance Rated Current10.3 A
Saturation Current @ 10%4.1 A
Saturation Current @ 30%8.4 A
DC Resistance11.5 mΩ
Self Resonant Frequency50 MHz
DC Resistance10 mΩ
Operating Voltage80 V
MountSMD/SMT Soldering 
Type/Size4020 
–Check availability