B4-43

Size (max.): HR151 and HR152 models, case H6

2.125 x 1.125 x 0.495 inches (53.98 x 28.58 x 12.57 mm)

HR153 models, case F4

1.950 x 1.350 x 0.505 inches (49.53 x 34.29 x 12.83 mm)

See section B8, cases F4 and H6 for dimensions.

Weight:

HR151 and HR152: 50 grams typical. HR153: 53 grams typical.

Screening:

Standard only. See Section C2 for screening description.

DESCRIPTION

The HR150 Series™ DC/DC converters have been designed to give

industrial applications the same high reliability, small size, and high

performance that Interpoint has provided to military and aerospace

programs since 1969.

Each HR150 converter is built to perform reliably in the harshest

environments. Assembled using thick-film hybrid technology, HR150

converters have more uniform thermal coefficients and 50% fewer

connections than converters built by surface mount techniques. The

HR150 converter parts use the same manufacturing procedures and

quality controls that we apply to converters designed for commercial

airliners, the space shuttle, advanced fighter aircraft, and other high

reliability applications. The steel cases are hermetically sealed in a

dry nitrogen environment and are guaranteed a maximum leak rate

tested.

The HR150 Series manufacturing techniques provide extremely

small size and low profile components. Each converter uses less

than 2.7 square inches of board area. The overall power density is

from 11 to 17 watts per cubic inch.

The HR150 Series converters are high efficiency, low noise, pulse

width modulated, forward mode switching regulators with a constant

switching frequency of 125 kHz typical for single and dual output

models and 250 kHz typical for triple output models. They achieve

high isolation (500 V, 100 megohm) through use of a transformer in

the forward power circuit and an opto-coupler in the feedback

control loop.

HR 150 Series input ranges are 10 to 16 VDC or 18 to 36 VDC for

single or triple output models and 18 to 36 VDC for dual output

models. Outputs are available as 5, 12, 15, ±12, ±15, +5/±12, and

+5/±15 VDC. The converters typically provide greater than 80% effi-

ciency over the entire input range and from 25% to full load. Line

regulation is typically within 0.1 % and load regulation within 0.2%.

HR150 converters are designed to operate between –40°C and

+85°C case and are short circuit protected up to a case temperature

of 85°C. The combination of high conversion efficiency and heat

dissipating metal enclosures minimizes heat sinking requirements. If

additional dissipation is desired, heat conducting material (PCB,

copper sheet, heat sink, etc.) may be brought into contact with the

unit’s baseplate.

An inhibit function is provided for HR150 converters when the inhibit

input pin is connected to the input common. The open circuit voltage

of the inhibit input pin is 8 to 10 VDC (Vin = 12) or 11 to 13 VDC

(Vin = 28). The inhibit input pin must sink approximately 1 mA

during the inhibit state. During inhibit, the converter’s output voltage

drops to less than 1 volt and the input current is typically 8 mA.

HR150 SERIES

20 WATT

• –40°C to +85°C operation

• 10 to 16 VDC input or

18 to 36 VDC input

• Fully Isolated

• Optocoupler feedback

• Fixed frequency,

125 kHz typical single and dual outputs

250 kHz typical triple outputs

• Transient protection

50 V for up to 50 ms 28 Vin models

• Inhibit function

• Indefinite short circuit protection

• Up to 86% efficiency

• Output trim on single output models

MODELS

SINGLE

5

12

15

DUAL

±12

±15

TRIPLE

+5 & ±12

+5 & ±15