EEWORLDEEWORLDEEWORLD

Part Number

Search

HR703-285

Description
DC/DC CONVERTERS 28 VOLT INPUT
File Size117KB,9 Pages
ManufacturerCrane Co.
Download Datasheet Compare View All

HR703-285 Overview

DC/DC CONVERTERS 28 VOLT INPUT

F
EATURES
–40°C to + 85°C operation
19 to 40 VDC input
Fully Isolated
Optocoupler feedback
Fixed frequency, 245 kHz typical
Topology – Push-Pull Forward
50 V for up to 50 ms transient protection
Inhibit/sync function
Indefinite short circuit protection
Remote sense on single models
Up to 84% efficiency
DC/DC C
ONVERTERS
28 V
OLT
I
NPUT
SINGLE
5
12
15
HR700 SERIES
70 WATT
MODELS
VDC O
UTPUT
DUAL
±12
±15
TRIPLE
+5 & ±12
+5 & ±15
Size (max.): 3.20 x 2.46 x 0.595 inches
(81.3 x 62.5 x 15.11 mm)
See Section B8, case L, for dimensions.
Weight:
140 grams typical
Screening: Standard only.
See Section B9 for screening description.
DESCRIPTION
HR700 Series DC/DC converters offer up to 70 watts of power from
single, dual, or triple outputs in one package. The converters
combine the small size and high reliability of hybrid-based compo-
nents, the high efficiency of switching regulators, and the isolation,
regulation, and low noise characteristics of linear regulators.
provided by detecting peak primary switching current on a cycle
basis and limiting it to approximately 130% of the full load input
current. This method results in quick and positive current limiting
under short circuit conditions.
HR700 Series DC/DC converters are designed to provide full power
operation over the input voltage range of 19 to 40 VDC. Operation
below an input of 19 volts is possible with derated output power.
Outputs are available as 5, 12, and 15 VDC single, dual and triple
outputs. The converters typically provide greater than 80% effi-
ciency over the entire input range. Line regulation is typically within
0.1% and load regulation within 0.2%.
SMALL SIZE
The HR700 converters are manufactured using techniques that
provide very small size and low profile components. Each converter
uses less than eight square inches of board areas and is 0.595
inches high or less. The overall power density is 20 watts per cubic
inch.
LOW NOISE
The HR700 Series converters offer low noise on both the input and
output lines. A two section, four pole, LC input filter is included to
provide very low reflected line ripple current. Output ripple is main-
tained at less than 50 mV p-p for single and dual models and 85 mV
p-p for triple output models.
HIGH RELIABILITY
Assembled using thick-film technology, the HR700 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 of less than 10
-3
atm-
cc/sec. All devices are 100% electrically tested.
INHIBIT
/
SYNC FEATURE
An inhibit/sync pin is standard on all models of the HR700 Series
converters. The pin serves as both an output inhibit and as a
synchronization input. In the inhibit mode an open collector TTL
compatible low (<0.8 V) will disable internal switching thereby
inhibiting the unit’s output. Inhibiting in this manner results in an
extremely low quiescent current.
HIGH PERFORMANCE
The HR700 series parts are high efficiency, low noise, pulse-width
modulated converters which use a quasi-square wave forward
converter design with a nominal switching frequency of 245 kHz.
Isolation between input an output is provided with a transformer in
the forward power loop and a wide band, temperature insensitive,
optical link in the feedback control loop. Short circuit protection is
B4-33

HR703-285 Related Products

HR703-285 HR702-2815 HR703-2812 HR703-2815
Description DC/DC CONVERTERS 28 VOLT INPUT DC/DC CONVERTERS 28 VOLT INPUT DC/DC CONVERTERS 28 VOLT INPUT DC/DC CONVERTERS 28 VOLT INPUT
Maker - Crane Co. Crane Co. Crane Co.
Reach Compliance Code - compliant compli unknow
Analog Integrated Circuits - Other Types - DC-DC REGULATED POWER SUPPLY MODULE DC-DC REGULATED POWER SUPPLY MODULE DC-DC REGULATED POWER SUPPLY MODULE
Efficiency (main output) - 83% 84% 84%
Maximum input voltage - 40 V 40 V 40 V
Minimum input voltage - 19 V 19 V 19 V
Nominal input voltage - 28 V 28 V 28 V
JESD-30 code - R-XXMA-P10 R-MUFM-P10 R-MUFM-P10
Maximum grid adjustment rate - 0.142% 0.119% 0.119%
Maximum load regulation - 0.333% 0.25% 0.2%
Number of functions - 1 1 1
Output times - 2 3 3
Number of terminals - 10 10 10
Maximum operating temperature - 85 °C 85 °C 85 °C
Minimum operating temperature - -40 °C -40 °C -40 °C
Maximum output voltage - 15.25 V 5.15 V 5.1 V
Minimum output voltage - 14.75 V 4.9 V 4.9 V
Nominal output voltage - 15 V 5.05 V 4.95 V
Package body material - UNSPECIFIED METAL METAL
Package shape - RECTANGULAR RECTANGULAR RECTANGULAR
Package form - MICROELECTRONIC ASSEMBLY FLANGE MOUNT FLANGE MOUNT
Protect - CURRENT CURRENT CURRENT
Certification status - Not Qualified Not Qualified Not Qualified
surface mount - NO NO NO
technology - HYBRID HYBRID HYBRID
Temperature level - INDUSTRIAL INDUSTRIAL INDUSTRIAL
Terminal form - PIN/PEG PIN/PEG PIN/PEG
Terminal location - UNSPECIFIED UPPER UPPER
Maximum total power output - 70 W 60 W 60 W
Fine-tuning/adjustable output - NO NO NO
D91 Decoder
D91 European car decoder   ■ BMW system BMW card V3.50, to 2002, all models of engine, electronic automatic transmission, ABS, airbags, (ASC), 4-8 airbags (SRS), EML electronic throttle control and ot...
frozenviolet Automotive Electronics
How to make a software watchdog in Nios? Ask for code
How to make a software watchdog in Nios? I want code and explanation on how to initialize, feed the watchdog, set the interrupt cycle, etc. What are the special settings in SOPC? Feed the watchdog at ...
justsee Embedded System
[Transfer] ECG acquisition design, with source code. For your reference (msp430)
[i=s] This post was last edited by Sino on 2015-3-3 22:04 [/i] Newbie reporting in, bringing some information to everyone...
Sino Microcontroller MCU
High-speed and high-precision motion controller using DSP+FPGADSP+FPGA
Digital signal processors have efficient numerical computing capabilities and can provide a good development environment, while programmable logic devices have highly flexible configurability. This ar...
Aguilera DSP and ARM Processors
How to download files from PC to WinCE via programming?
As the title says, the wince image has been downloaded, how can I download files to the wince end, through any channel, such as serial port, network port, USB port, etc. Please help, thank you...
mamh Embedded System
Bean sprout automatic watering controller
As shown in the figure, this is the bean sprout automatic watering control circuit. The controller consists of a step-down rectifier circuit, a power failure notification device (IC3), a timing contro...
探路者 Mobile and portable

EEWorld
subscription
account

EEWorld
service
account

Automotive
development
circle

Robot
development
community

Index Files: 1544  1523  2792  2050  1788  32  31  57  42  36 
Datasheet   0 1 2 3 4 5 6 7 8 9 A B C D E F G H I J K L M N O P Q R S T U V W X Y Z
Room 1530, 15th Floor, Building B, No. 18 Zhongguancun Street, Haidian District, Beijing Telephone: (010) 82350740 Postal Code: 100190
Copyright © 2005-2026 EEWORLD.com.cn, Inc. All rights reserved 京ICP证060456号 京ICP备10001474号-1 电信业务审批[2006]字第258号函 京公网安备 11010802033920号