# Absent Maroon Wall-E ## Description TDK-Lambda i7C4W012A050V-P03 EVK Constant-Power ITRIM Daughterboard ## Project Details - **Owner:** sufkion - **Created:** 3/14/2026 - **Last Updated:** 3/14/2026 - **Visibility:** Public - **System Architecture:** flowchart TD EVK["TDK-Lambda EVK\nVOUT + ITRIM"] -->|VOUT_IN| DIV["VOUT Divider\n90.9k/10k"] DIV -->|VX_RAW| BUF_VX["OPA4192 Buffer\nVX_BUF"] REF25["2.5V Reference"] --> CPREF["VCP_REF\n110mV via 21.5k/1k"] REF25 --> OFF230["V230_REF\n230mV via 9.87k/1k"] BUF_VX --> AD633["AD633 Multiplier"] LOOP["OPA4192 Control Loop\nforces VMULT=VCP_REF"] --> VC["VCMD"] AD633 -->|VMULT| LOOP CPREF --> LOOP LOOP --> VC VC --> SUM1["OPA4192 Adder\nVCMD + V230_REF"] OFF230 --> SUM1 SUM1 -->|VITRIM_RAW| OUTR["100 ohm series"] OUTR -->|ITRIM_OUT| EVK EVK --- GND["Star Analog GND"] GND --- DIV GND --- BUF_VX GND --- REF25 GND --- AD633 GND --- LOOP GND --- SUM1 ## Key Components ### J1 — [Pin Header 01x04 2.54mm Vertical](https://www.flux.ai/adrian95/pin-header-01x04-254mm-vertical.md) - Role: EVK Interface - Package: THT_1x4_2.54mm - Part Type: Connector - License: https://creativecommons.org/licenses/by/4.0/ - Role Details: Header to connect to EVK for VOUT sense and ITRIM drive **Pins:** - Pin_1 [pin 1] - Pin_2 [pin 2] - Pin_3 [pin 3] - Pin_4 [pin 4] ### TP1 — [1.25mm SMD Test Point](https://www.flux.ai/jharwinbarrozo/1p25mm-smd-test-point.md) - Role: Test Point - Package: SMD_TestPoint_1.25mm - Role Details: SMD probe pad for debug/measurement; label per net name **Pins:** - P1 ### TP10 — [1.25mm SMD Test Point](https://www.flux.ai/jharwinbarrozo/1p25mm-smd-test-point.md) - Role: Test Point - Role Details: SMD probe pad for debug/measurement; label per net name - Package: SMD_TestPoint_1.25mm **Pins:** - P1 ### TP11 — [1.25mm SMD Test Point](https://www.flux.ai/jharwinbarrozo/1p25mm-smd-test-point.md) - Role Details: SMD probe pad for debug/measurement; label per net name - Package: SMD_TestPoint_1.25mm - Role: Test Point **Pins:** - P1 ### TP12 — [1.25mm SMD Test Point](https://www.flux.ai/jharwinbarrozo/1p25mm-smd-test-point.md) - Package: SMD_TestPoint_1.25mm - Role: Test Point - Role Details: SMD probe pad for debug/measurement; label per net name **Pins:** - P1 ### TP2 — [1.25mm SMD Test Point](https://www.flux.ai/jharwinbarrozo/1p25mm-smd-test-point.md) - Package: SMD_TestPoint_1.25mm - Role Details: SMD probe pad for debug/measurement; label per net name - Role: Test Point **Pins:** - P1 ### TP3 — [1.25mm SMD Test Point](https://www.flux.ai/jharwinbarrozo/1p25mm-smd-test-point.md) - Role Details: SMD probe pad for debug/measurement; label per net name - Package: SMD_TestPoint_1.25mm - Role: Test Point **Pins:** - P1 ### TP4 — [1.25mm SMD Test Point](https://www.flux.ai/jharwinbarrozo/1p25mm-smd-test-point.md) - Package: SMD_TestPoint_1.25mm - Role: Test Point - Role Details: SMD probe pad for debug/measurement; label per net name **Pins:** - P1 ### TP5 — [1.25mm SMD Test Point](https://www.flux.ai/jharwinbarrozo/1p25mm-smd-test-point.md) - Role Details: SMD probe pad for debug/measurement; label per net name - Package: SMD_TestPoint_1.25mm - Role: Test Point **Pins:** - P1 ### TP6 — [1.25mm SMD Test Point](https://www.flux.ai/jharwinbarrozo/1p25mm-smd-test-point.md) - Package: SMD_TestPoint_1.25mm - Role Details: SMD probe pad for debug/measurement; label per net name - Role: Test Point **Pins:** - P1 ### TP7 — [1.25mm SMD Test Point](https://www.flux.ai/jharwinbarrozo/1p25mm-smd-test-point.md) - Role Details: SMD probe pad for debug/measurement; label per net name - Role: Test Point - Package: SMD_TestPoint_1.25mm **Pins:** - P1 ### TP8 — [1.25mm SMD Test Point](https://www.flux.ai/jharwinbarrozo/1p25mm-smd-test-point.md) - Role Details: SMD probe pad for debug/measurement; label per net name - Role: Test Point - Package: SMD_TestPoint_1.25mm **Pins:** - P1 ### TP9 — [1.25mm SMD Test Point](https://www.flux.ai/jharwinbarrozo/1p25mm-smd-test-point.md) - Role Details: SMD probe pad for debug/measurement; label per net name - Role: Test Point - Package: SMD_TestPoint_1.25mm **Pins:** - P1 ### U1 — [OPA4192IDR](https://www.flux.ai/lcsc/opa4192idr.md) - Role: Analog Control Amp - Role Details: Quad op-amp powered from +-12VA for buffer, loop, and summing stages - JLCPCB Part Class: Extended Part - Package or Case Code: SOIC-14_L8.7-W3.9-P1.27-LS6.0-BL - LCSC Part Number: C2057908 - Manufacturer Part Number: OPA4192IDR - Manufacturer Name: TI(德州仪器) - Package: SOIC-14 **Pins:** - -INA [pin 2] - -INB [pin 6] - -INC [pin 9] - -IND [pin 13] - +INA [pin 3] - +INB [pin 5] - +INC [pin 10] - +IND [pin 12] - OUTA [pin 1] - OUTB [pin 7] - OUTC [pin 8] - OUTD [pin 14] - V- [pin 11] - V+ [pin 4] ### U2 — [AD633ARZ-RL](https://www.flux.ai/lcsc/ad633arz-rl.md) - Product Info Url: https://lcsc.com/product-detail/Counters-Dividers_Analog-Devices_AD633ARZ-RL_Analog-Devices-ADI-LINEAR-AD633ARZ-RL_C650391.html - Part Type: Counters / Dividers - Manufacturer Name: ADI(亚德诺) - Role Details: Configured so W=VX_BUF*VCMD/10; servo forces W=VCP_REF to realize VCMD=11/VOUT - Manufacturer Part Number: AD633ARZ-RL - LCSC Part Number: C650391 - JLCPCB Part Class: Extended Part - Datasheet URL: https://storage.googleapis.com/graviton-electric-symbols/document_assets/lcsc/2007091836_Analog-Devices-AD633ARZ-RL_C650391.pdf - Role: Analog Multiplier - Package: SOIC-8 - Package or Case Code: SOIC-8_L4.9-W3.9-P1.27-LS6.0-BL **Pins:** - -VS [pin 3] - +VS [pin 6] - W [pin 5] - X1 [pin 7] - X2 [pin 8] - Y1 [pin 1] - Y2 [pin 2] - Z [pin 4] ### U3 — [ADR4525BRZ-R7](https://www.flux.ai/lcsc/adr4525brz-r7.md) - Part Type: Voltage References - Operating Temperature: -40°C ~ 125°C (TA) - Current Supply: 950µA - Datasheet URL: https://storage.googleapis.com/graviton-electric-symbols/document_assets/lcsc/2304140030_Analog-Devices-ADR4525BRZ-R7_C403914.pdf - JLCPCB Part Class: Extended Part - Output Current: 10mA - LCSC Part Number: C403914 - Package or Case Code: SOIC-8_L4.9-W3.9-P1.27-LS6.0-BL - Role Details: 2.5 V precision reference powered from +12VA with local filtering - Product Info Url: https://lcsc.com/product-detail/Voltage-References_Analog-Devices-ADI-ADR4525BRZ-R7_C403914.html - Max Input Voltage: 3 ~ 15V - Manufacturer Name: ADI(亚德诺) - Package: SOIC-8 - Role: Voltage Reference - Manufacturer Part Number: ADR4525BRZ-R7 **Pins:** - DNC [pin 8] - GND [pin 4] - NIC [pin 1] - NIC [pin 7] - NIC [pin 5] - NIC [pin 3] - VIN [pin 2] - VOUT [pin 6] *The full schematic, PCB layout, bill of materials, and interactive design are available at [https://www.flux.ai/sufkion/absent-maroon-wall-e](https://www.flux.ai/sufkion/absent-maroon-wall-e).* --- *Generated from [https://www.flux.ai/sufkion/absent-maroon-wall-e](https://www.flux.ai/sufkion/absent-maroon-wall-e)*