Isolated 75 W DC/DC Converter feature triple outputs.

Press Release Summary:

Supplied in 2.28 x 2.4 x 0.55 in. package, half-brick HE Series offers 3.3 and 5 V (primary) and ±12, ±15, and ±17 Vdc (auxiliary) output voltages. Input to output isolation is 700 Vdc for 18–36 V input models and 1,544 Vdc for 36–75 V models, and respective full load input current is 3.67 and 1.8 A. No-load input current is 15 mA for all models, and UVLO and reverse polarity protection is standard. Other features include 325 kHz switching frequency and efficiencies up to 89%.

Original Press Release:

75 Watt Triple Output DC/DC Converter

Calex Mfg. Co., Inc. of Concord CA announces the availability of the HE Series isolated 75 Watt triple output DC/DC Converters. All HE models are housed in an industry standard half brick package measuring 2.28” x 2.4” x 0.55”. The input ranges available are 18 to 36VDC and 36 to 75VDC. Output voltages available are 3.3 and 5V as the primary outputs and +/-12, +/-15 and +/-17VDC as the auxiliary outputs. The input to output isolation of all models is 700VDC for the 18 to 36V input models and 1544VDC for the 36 to 75V models.

All HE models feature Undervoltage Lockout and Reverse Polarity Protection. The No-Load Input Current is 15mA and Full Load Input Current is 3.67A for the 18 to 36V input models and 1.8A for the 36 to 75V input models. The Switching Frequency for the HE Series is 325kHz. Efficiencies run as high as 89%. The Output Voltage Setpoint Accuracy is +/-1% with zero Turn On Overshoot. The Temperature Coefficiency of the HE is 0.003%/C typical. Line and Load Regulation is 0.01% and 1% respectively. All models are protected through Pulse by Pulse Current Limiting, Over Temperature Protection, Short Circuit Protection and backed by Calex’s Five Year Warranty.

All models feature Remote ON/OFF. The OFF idle current is 2mA DC. Output Voltage Trim is also available with a trim range of +/- 10%. The Case Operating Temperature Range of the HE Series is -40 to +100C. The Storage Temperature Range is -40 to +120C. Unit weight is 4.6 oz. Chassis mounting kits are available for screw terminal connections. Units are available from stock to six weeks. Contact the factory for pricing. For more information on the 75 Watt HE Triple Output DC/DC go to or contact Calex at 800-542-3355/925-687-4411 (phone), 925-687-3333 (fax), Calex’s corporate headquarters are located at 2401 Stanwell Drive, Concord, CA 94520 USA.

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