unr-3.3 C&D Technologies., unr-3.3 Datasheet

unr-3.3

Manufacturer Part Number

unr-3.3

Description

5vin, 1.5-3.3vout Dc/dc Converters

Manufacturer

C&D Technologies.

Datasheet

1.UNR-3.3.pdf (8 pages)

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Download datasheet (991Kb)

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Features

■

Typical topology is shown.

Output: Non-isolated

Input Voltage: 4.75-5.5V (5V nominal)

Package: 2" x 2" x 0.49" open-frame with

attached heat sink

Full synchronous-rectifier topology

Efficiencies as high as 91%

Noise as low as 75mVp-p

Stable no-load operation

Excellent thermal derating

Output short-circuit protection

On/off control, trim and sense functions

UL60950/EN60950 certified

Qual tested, HALT tested, EMI tested

www.murata-ps.com/rohs

1.5V or 1.8V @ 20 Amps

2.5V or 3.3V @ 15 or 20 Amps

For full details go to

CONTROL

ON/OFF

RETURN

+INPUT

INPUT

(6)

(8)

(7)

VOLTAGE

BOOST

users of modern DSP’s and CPLD’s requiring up to 20 Amps of "low-voltage"

(1.5-3.3V) current are constrained to drawing that power from a legacy 5V bus.

These are non-isolated DC/DC converters that deliver up to 20 Amps of 1.5-3.3V

current from a 5V input. Combining a modern, fully synchronous buck topology with

a unique, integrated-metal-technology (IMT) package, the automatically assembled

30-66W UNR’s deliver high efficiency (to 91%), excellent thermal performance (to

+70°C with 100lfm air flow), and low cost.

load (±0.5%) regulated and feature low noise (typically 75mVp-p) and quick step

response (50msec). Their feature set includes V

function, output remote-sense pins, and output overcurrent detection and short-

circuit protection ("hiccup" technique with auto-recovery). Their unique package

integrates an anodized aluminum heat sink with the circuit’s thermal-clad aluminum

baseplate. With minimal air flow (100lfm), all models deliver full output power/cur-

rent up to +65°C.

fied. Safety certifications, EMC compliance test reports, and qualification (including

HALT) test reports are available upon request.

CONTROLLER

DATEL’s 30-66W UNR Series deliver an excellent solution to situations in which

These converters require no compromises. They are fully line (±0.1%) and

All UNR 30-66W Open-Frame DC/DC Converters are UL1950/EN60950 certi-

PWM

Figure 1. Simplified Schematic

OVERCURRENT

DETECTION

REFERENCE &

ERROR AMP

UNR Open-Frame Series

Technical enquiries email: sales@murata-ps.com, tel:

Single Output, Non-Isolated, 15-20 Amp

IN,

OUT

1.5-3.3V

trim capability, an on/off control

10.5Ω

OUT

+OUTPUT

+SENSE

OUTPUT

RETURN

–SENSE

TRIM

(1)

OUT

DC/DC Converters

UNR30-66W.B01 Page 1 of 8

(3)

(2)

(5)

(4)

+1 508 339 3000

Related parts for unr-3.3

unr-3.3 Summary of contents

Page 1

... Typical topology is shown. www.murata-ps.com UNR Open-Frame Series DATEL’s 30-66W UNR Series deliver an excellent solution to situations in which users of modern DSP’s and CPLD’s requiring Amps of "low-voltage" (1.5-3.3V) current are constrained to drawing that power from a legacy 5V bus. These are non-isolated DC/DC converters that deliver Amps of 1.5-3.3V current from a 5V input ...

Page 2

... UNr-2.5/20-D5 2.5 20 UNr-3.3/15-D5 3.3 15 UNr-3.3/20-D5 3.3 20 ➀ Typical +25°C under nominal line voltage and full-load conditions, unless A otherwise noted. All models are tested and specified with a 22µF output capacitor with a 200mΩ ESR and a 4000µF input capacitor with 9.75Arms ripple-current rating and 20mΩ ESR. ...

Page 3

... See Ordering Guide Standby/Off Mode TBD Input ripple current: UNR-1.5/20-D5, UNR-1.8/20-D5 260mAp-p UNR-2.5/15-D5 150mAp-p UNR-2.5/20-D5 140mAp-p UNR-3.3/15-D5 100mAp-p UNR-3.3/20-D5 150mAp-p Input Filter Type Capacitive (74µF) Overvoltage Protection None reverse-Polarity Protection None On/Off control (Pin 6) ➂ open or + Off = +0.4V to 1V; I Output ...

Page 4

... On/Off control The On/Off Control pin may be used for remote on/off operation. UNR 30- 66W Series DC/DC converters are designed so that they are enabled when the control pin is pulled high or left open, and disabled when the control pin is pulled low (see Performance Specifications for limits). As shown in Figure 2, all models have internal 5kΩ ...

Page 5

... RETURN depending upon desired output voltage. Figure 4. Trim connections Using Fixed resistors UNr-1.5/20-D5 Trim Equations UNr-1.8/20-D5 Trim Equations UNr-2.5/15-D5 & UNr-2.5/20-D5 Trim Equations UNr-3.3/15-D5 & UNr-3.3/20-D5 Trim Equations V = desired output voltage. O Technical enquiries email: sales@murata-ps.com, tel: UNR30-66W.B01 Page 508 339 3000 ...

Page 6

... UNR Open-Frame Series Single Output, Non-Isolated, 15-20 Amp Typical Performance Curves Technical enquiries email: sales@murata-ps.com, tel: 5V 1.5-3.3V DC/DC Converters IN, OUT +1 508 339 3000 UNR30-66W.B01 Page ...

Page 7

Page 8

... Shanghai, Tel: +86 215 027 3678, email: shanghai@murata-ps.com Guangzhou, Tel: +86 208 221 8066, email: guangzhou@murata-ps.com © 2008 Murata Power Solutions, Inc. 04/10/08 Single Output, Non-Isolated, 15-20 Amp 5V 1.5-3.3V DC/DC Converters IN, OUT 10ms/div Technical enquiries email: sales@murata-ps.com, tel: +1 508 339 3000 UNR30-66W.B01 Page ...

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