This document is a technical manual for the HE-HP Manual High Efficiency Vehicle Power Supply DC to DC Convertor manufactured by TRI-M ENGINEERING. It is designed for embedded applications and offers high efficiency and performance.
The HE-HP is a high‑efficiency 100 W DC‑DC power supply designed for embedded vehicular applications. It delivers regulated +5 V and +12 V outputs from a wide 6‑40 V input range and includes transient suppression for harsh environments.
This manual covers the product’s specifications, mechanical dimensions, wiring diagrams, connector descriptions, power‑considerations, jumper settings, and LED jumper enable/disable procedures, helping integrators install and configure the unit safely and correctly.
| +5V Output Current | 20 A |
|---|---|
| +12V Output Current | 2.5 A |
| Input Voltage Range | 6 V to 40 V |
| Load Regulation | < 60 mV |
| Line Regulation | 40 mV |
| Output Temperature Drift | < 40 mV |
| Switching Frequency | 75 kHz |
| Max Input Transient | 125 V for 100 ms |
| Output Ripple | < 20 mV |
| Conducted Susceptibility | > 57 dB |
| Efficiency | Up to 95 % |
| Operating Temperature Range | -40 °C to 85 °C |
| Quiescent Current | 1.3 mA |
| Physical Size (PC/104 form factor) | 3.55"W × 3.75"L × 0.6"H |
The HE-HP accepts an input voltage from 6 V to 40 V DC.
LEDs can be disabled by removing the LED jumper or cutting the small PCB trace associated with the LED.
The power supply turns on when 6 V to 40 V is applied to the ignition input (SD) on connector CN3‑1.