STMicroelectronics STM32F413RG
Compact Anpr Auxiliary Controller For Jetson Agx
Overview
A compact DIN rail mountable ANPR auxiliary controller featuring STM32 MCU, robust 9-36V vehicle power conditioning, isolated I/O, and PWM IR illumination control for NVIDIA Jetson AGX integration.
Ahmad AbdullahzadaSystem architecture
POWER
MCU
MODULE
ACTUATOR
- POWER_MANAGEMENT → MCU_SUBSYSTEMPowerSupplies regulated power and ignition sense signal to MCU
- ISOLATED_DIGITAL_INPUT → MCU_SUBSYSTEMGPIOIsolated digital input signals routed to MCU capture pins
- MCU_SUBSYSTEM → ISOLATED_DIGITAL_OUTPUTGPIOControl signals driving isolated high-side output switches
- MCU_SUBSYSTEM → PWM_IR_CONTROLPWMHigh-resolution hardware PWM signals for IR illuminator timing
- USB_UART_BRIDGE → MCU_SUBSYSTEMUARTSerial telemetry and command link to NVIDIA Jetson AGX via USB
- MCU_SUBSYSTEM → STATUS_INDICATORSGPIODirect GPIO drive for diagnostic status LEDs
Bill of materials
| Part number | Type | Component | Manufacturer | Package | Qty | Datasheet | Match |
|---|---|---|---|---|---|---|---|
| KP36A | POWER | TI LMR33630-Q1 & LM74800-Q1 / Littelfuse 5KP36A 9-36V DC input conditioning with reverse polarity protection, 5kW surge suppression, ignition sensing, and 5V step-down conversion. | Texas Instruments / Littelfuse / Analog Devices / Bourns / Vishay | — | 1 | Pending | |
7 alternatives consideredAI verified | |||||||
| STM32F413RGT6TR | MCU | STMicroelectronics STM32F413RG Core controller managing ignition timing, pulse synchronization, telemetry, and peripheral monitoring. | Stmicroelectronics | 64-LQFP | 1 | Matched | |
5 alternatives consideredAI verified | |||||||
| ACPL-847 | MODULE | Broadcom ACPL-847 / Schmitt-Trigger Optocoupler Dual isolated digital inputs for dry/wet contact vehicle status monitoring. | Broadcom/AVAGO | DIP | 1 | Matched | |
| BTS7008-1EPP | ACTUATOR | Infineon BTS7008-1EPP Smart High-Side Switch Dual 24V-capable isolated digital outputs for external actuator or auxiliary triggering. | Infineon Technologies / Texas Instruments | — | 1 | Pending | |
2 alternatives consideredAI verified | |||||||
| TIM1 | ACTUATOR | Advanced Timer TIM1 / MOSFET Gate Driver Dual 3.3V PWM outputs for precision IR illuminator control and timing synchronization. | Microchip Technology | — | 1 | Pending | |
2 alternatives consideredAI verified | |||||||
| CP2102 | MODULE | Silicon Labs CP2102N Provides low-speed command and telemetry communication interface with the NVIDIA Jetson AGX. | Silicon Labs | QFN28 | 1 | Matched | |
| DIN-RAIL-20 | MODULE | 3x Status LEDs (Power, Status, IGN) Visual system status monitoring via 3 status LEDs. | antaira | — | 1 | Matched | |
3 alternatives consideredAI verified | |||||||
Build guide
3-5 hoursAdvanced
1
Procurement & Preparation
- Procure all bill of materials components including KP36A surge suppressor, STM32F413RGT6TR MCU, ACPL-847 optocouplers, BTS7008-1EPP high-side switches, and CP2102N USB-UART bridge.
- Prepare the PCB stencil and inspect the DIN rail mountable enclosure and thermal pads.
2
Hardware Assembly & Wiring
- Apply lead-free solder paste to the PCB pads using the precision stencil and place all surface-mount components including the LMR33630-Q1 regulator, STM32 MCU, and CP2102N bridge.
- Run the populated board through the reflow oven following the manufacturer thermal profile for SAC305 solder.
- Mount the assembled PCB into the DIN-RAIL-20 enclosure, securing terminal blocks for the 9-36V vehicle power conditioning input, isolated digital inputs (DIN1, DIN2), and PWM IR outputs.
3
Firmware Setup
- Connect the ST-Link programmer to the STM32F413RG SWD header on the auxiliary controller board.
- Flash the ANPR auxiliary controller firmware supporting ignition timing, pulse synchronization, TIM1 PWM generation, and telemetry streaming over the CP2102N UART interface to the NVIDIA Jetson AGX.
4
Testing & Calibration
- Apply a variable DC bench power supply from 9V to 36V to the power input terminals and verify stable 5V and 3.3V step-down conversion alongside IGN_SENSE signal logic.
- Test isolated digital inputs (DIN1, DIN2) using dry/wet contact stimulation and verify high-side switch (BTS7008-1EPP) actuation on DOUT1_CTRL and DOUT2_CTRL.
- Verify TIM1_CH1 and TIM1_CH2 PWM output signals for precision IR illuminator synchronization, and test telemetry communication over UART with the NVIDIA Jetson AGX.
Document
Compact Anpr Auxiliary Controller For Jetson Agx
A compact DIN rail mountable ANPR auxiliary controller featuring STM32 MCU, robust 9-36V vehicle power conditioning, isolated I/O, and PWM IR illumination control for NVIDIA Jetson AGX integration.
Design Overview
| Item | Details |
|---|---|
| Product Type | Anpr Auxiliary Controller |
| Key Functions | Ignition-switched power management with 9-36V DC input, reverse polarity protection, and surge suppression, Dual isolated digital inputs and dual 24V-capable isolated digital outputs, Dual 3.3V PWM outputs for precision IR illuminator control and timing synchronization, USB-UART bridge for low-speed command and telemetry communication with NVIDIA Jetson AGX, System status monitoring via 3x status LEDs in a DIN rail mountable form factor |
| Power Source | 9-36V DC vehicle/industrial power supply |
| Connectivity | USB-UART |
| Size | Compact DIN rail / panel mount enclosure |
| Environment | Mobile police vehicle, -20°C to +70°C |
| Difficulty | Advanced |
| Est. Time | 3-5 hours |
System Architecture
Power Topology: 9-36V DC vehicle battery input -> Littelfuse 5KP36A TVS & LM74800-Q1 Ideal Diode -> LMR33630-Q1 Buck Converter (5V) -> LDO (3.3V) for MCU and logic.
Module List
| Module ID | Type | Name | Function | Voltage |
|---|---|---|---|---|
| POWER_MANAGEMENT | POWER | TI LMR33630-Q1 & LM74800-Q1 / Littelfuse 5KP36A | 9-36V DC input conditioning with reverse polarity protection, 5kW surge suppression, ignition sensing, and 5V step-down conversion. | 9-36V to 5V |
| MCU_SUBSYSTEM | MCU | STMicroelectronics STM32F413RG | Core controller managing ignition timing, pulse synchronization, telemetry, and peripheral monitoring. | 3.3V |
| ISOLATED_DIGITAL_INPUT | MODULE | Broadcom ACPL-847 / Schmitt-Trigger Optocoupler | Dual isolated digital inputs for dry/wet contact vehicle status monitoring. | 24V / 3.3V |
| ISOLATED_DIGITAL_OUTPUT | ACTUATOR | Infineon BTS7008-1EPP Smart High-Side Switch | Dual 24V-capable isolated digital outputs for external actuator or auxiliary triggering. | 24V |
| PWM_IR_CONTROL | ACTUATOR | Advanced Timer TIM1 / MOSFET Gate Driver | Dual 3.3V PWM outputs for precision IR illuminator control and timing synchronization. | 3.3V |
| USB_UART_BRIDGE | MODULE | Silicon Labs CP2102N | Provides low-speed command and telemetry communication interface with the NVIDIA Jetson AGX. | 3.3V |
| STATUS_INDICATORS | MODULE | 3x Status LEDs (Power, Status, IGN) | Visual system status monitoring via 3 status LEDs. | 3.3V |
Design Schemes
Automotive-Grade STM32F413RG & High-Reliability Isolated I/O Scheme ★
Utilizes STM32F413RG with automotive-grade wide-input buck conversion, ideal diode protection, and dual isolated channels for police vehicle ANPR auxiliary control.
Trade-offs: Provides high hardware reliability and precise PWM timing for IR strobes at a medium cost profile.
Key IC selection
Core controller managing ignition timing, pulse synchronization, telemetry, and peripheral monitoring
- Need: Real-time timer synchronization for IR strobes, UART telemetry, and robust GPIO/ADC handling in a 9-36V automotive/industrial environment.
- Class: ARM Cortex-M4 32-bit MCU with advanced timer peripherals
- Shortlist: STMicroelectronics STM32F4 series, NXP LPC54000 series
- Pick: Select based on LQFP package availability, extended temperature range (-40 to 105C), and advanced timer peripheral availability.
Wide input step-down regulator and reverse polarity/surge protection
- Need: Step down automotive 9-36V DC input to stable system rails while surviving load dump transients and reverse battery hookup.
- Class: Synchronous step-down DC-DC converter with ideal diode controller and TVS diode
- Shortlist: TI LMR33630-Q1 + LM74800-Q1, Analog Devices LT8640S + ideal diode controller
- Pick: Select based on automotive AEC-Q100 qualification, quiescent current, and thermal performance in DIN rail enclosure.
High-side switching for 24V actuators and auxiliary triggering
- Need: Drive 24V inductive loads safely with diagnostic feedback and short-circuit protection.
- Class: Smart High-Side Power Switch
- Shortlist: Infineon BTS7008-1EPP, STMicroelectronics IPS2050H
- Pick: Select based on on-state resistance (Rds_on), current limitation thresholds, and diagnostic reporting features.
Risk register
| ID | Area | Severity | Detail | Mitigation |
|---|---|---|---|---|
| r1 | thermal | med | Infineon BTS7008-1EPP driving heavy inductive loads inside a closed DIN rail plastic enclosure may experience thermal accumulation. | Ensure proper copper pour allocation on the PCB for heatsinking the high-side switches and verify maximum continuous current limits. |
| r2 | emi | high | High-speed PWM outputs driving external IR illuminators can couple high dV/dt noise into the adjacent digital inputs and UART lines. | Route PWM traces away from sensitive analog/input lines, use series damping resistors on gate drivers, and maintain solid ground reference planes. |
Key Components
4/7 modules matched to real parts. See the BOM tab for the full component table.
TI LMR33630-Q1 & LM74800-Q1 / Littelfuse 5KP36A (KP36A)
Rejected weak/wrong-class catalog hits; using web recommendation: KP36A
STMicroelectronics STM32F413RG (STM32F413RGT6TR)
Candidate 1 (STM32F413RGT6TR) and Candidate 3 (STM32F413RGT6) match the primary MPN STM32F413RG with valid ordering suff
Infineon BTS7008-1EPP Smart High-Side Switch (BTS7008-1EPP)
Web recommendation: BTS7008-1EPP (not in ES)
Advanced Timer TIM1 / MOSFET Gate Driver (TIM1)
Rejected weak/wrong-class catalog hits; using web recommendation: TIM1
Build Summary
- Difficulty: Advanced
- Estimated time: 3-5 hours
- Tools required: Solder paste printer, Pick-and-place machine, Convection reflow oven, ST-LINK/V2 programmer, DC bench power supply, Digital multimeter
See the Build tab for the full step-by-step assembly guide.
Generated by YuanQi AI Design System · Query: Compact ANPR auxiliary controller for NVIDIA Jetson AGX (Syslogic RML A5AGX). Power: 9-36V DC with reverse polarity protection and surge suppression. MCU: STM32 ARM Cortex-M4/M0+. Camera: USB 2.0 or MIPI CSI-2. IR illuminator control: 2x PWM output (3.3V). Digital outputs: 2x isolated digital output (24V capable). Digital inputs: 2x isolated digital input. Indicators: 3x status LED. Comm: USB-UART bridge to Jetson. Temp: -20°C to +70°C. Form factor: compact DIN rail / panel mount.