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HESC-SERD: 60W Smart Embedded Power Supply

HESC-SERD: 60W Smart Embedded Power Supply

Manufacturer: Tri-M Technologies



60 Watt High Efficiency Serial Port Embedded Power Supply

The HESC-SERD is a high efficiency, high performance DC to DC 60 watt embedded power supply that supplies +5V, -5V, +12V & -12V outputs. The HESC-SERD also includes a flash based microcontroller that supplies advanced power management, smart battery charger and an RS232 serial port. The HESC-SERD is designed for low noise embedded computer systems, has a wide input range of 6-50V(>8:1) and is ideal for battery or unregulated input applications. The HESC-SERD is specifically designed for vehicular applications and has heavy-duty transient suppressors (9000W) that clamp the main input voltage to safe levels, while maintaining normal power supply operation.

The HESC-SERD is a state-of-the-art Mosfet based design that provides outstanding line and load regulation with efficiencies up to 95 percent. Organic Semiconductor Capacitors provide filtering that reduces ripple noises below 20mV. The low noise design makes the HESC-SERD ideal for use aboard aircraft or military applications or wherever EMI or RFI must be minimized. The +5VDC and +12VDC outputs are controlled by a constant off-time current-mode architecture regulator that provides excellent line and load transient response.

The HESC-SERD provides up to four stages of battery charging and can charge Lead-Acid, NiCd, and NiMh batteries and is also SMBus level 3 compatible. Charge currents are up to 4A, and battery charging voltages from 9.5 to 35V.

The HESC-SERD has advanced power management functions that allows timed on/off control of the HESC-SERD, notification of changes to main power and changes in the battery status. For example, the HESC-SERD can be programmed to power off the outputs in 60 seconds, and then turn on again 12 hours later.

The HESC-SERD size is 3.55 x 3.775 inches, which is the same size as the PC/104 standard, and has the same mounting holes pattern as the PC/104 standard. However, the HESC-SERD does not supply the PC/104 bus connectors. (For a fully compliant PC/104 embedded power supply, please see Tri-M's HESC104.) All generated voltages are provided to a removable pluggable header. The removable plug allows the HESC-SERD to be easily installed. The RS232 serial port is provided on a 2x5 row pin header.

The HESC-SERD can be configured to meet almost any power supply and battery charging need for embedded applications, whether that be a simple +5V application, or providing power for back lighted LCD panels, or a full UPS (un-interruptible power supply configuration).


  • High efficiency
  • Extended temperature operation
  • Rugged design
  • Transient supression
  • Power/OS
  • Smart charging
  • PC104 size


Electrical Specifications

  • +5V output* 12.0A
  • +12V output 2.5A
  • -5 output 0.4A
  • -12V output 0.5A

Input Voltage

  • 6 to 50VDC

Charger Rating

  • Charge Current 0A to 4.0 A
  • Charging Voltage 10V to 35V


  • Size (W x L x H)**** 3.55” x 3.75” x 0.55”
  • Weight 7.30oz / 206.95g
  • Temperature Range -40 to +85°C

Performance Characteristics

  • Peak to Peak ripple* <20mV
  • Load Regulation** <60mV
  • Line Regulation** 40mV
  • Output Temp. Drift** <40mV
  • Output Ripple** 20mV
  • Quiescent Current*** 2mA
  • Soft Start: 5V start up risetime = 10 msec
  • Efficiency up to 95%


File Type Description
HESC-SERD-Spec-Sheet.pdf Spec Sheet HESC-SERD Spec Sheet
hesc_ups18_fw_man.pdf User Guide Firmware Manual for UPS18 based power supplies
hescserd_man.pdf User Guide HESC-SERD Manual

Profiles & Software

Battery Charging Profiles

Contains the configuration of the power management, and the battery charging characteristics.
Please note the following profiles are in the hex file format.

File Description
NiMh7U21 For Tri-M BAT104-NiMh 2100/2300/2500ma-hr battery pack
NiCd-7U For Tri-M BAT104-NiCd battery pack
SLA45A For Tri-M BAT104-SLA45 battery pack
HPSprof For Tri-M HPS3512 smart power supply

Smart Charger Utility Software

Frequently asked questions

Q. How do I get SCU to run under WIN2K or WINXP?
A. Windows "NT" based OS require an I/O driver such as Porttalk.

Q. How do I get SCU to run under Linux?
A. There are a number of approaches such as executing SCU.exe under the WINE enviroment.

Q. Is there an equivalent GUI for Linux as SCU for Windows?
A: Tri-M offers a GUI for Linux.

File Description
SCU.exe Files and Manual V3.0.15 Microsoft Windows based Smart Charger Utility (SCU.exe) Ver 3.0.15 software allows the User to configure and monitor HESC, V5SC and HPSC products
Linux Uploader Linux base Firmware uploaders for HESC-SER and HESC104+

Ordering Info

Part Number Description
HESC-SERD-PBF PC/104 size, In 6-50VDC, Out 60 watt, +5V, + 12V, -5V, -12V, -40 to +85C, Smart Charging, Serial Interface, wide input range +6VDC~+50VDC, (-40 to +85°C)

Orders can be placed by phone, e-mail, or through the Webstore


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By Phone

Toll Free: 800.665.5600 (North America)
Direct: 604.814.5069
Fax: 888.831.5149

By Mail

Tri-M Technologies Inc.
208 – 31510 Gill Avenue
Mission, BC, Canada  V4S 0A1

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