DCV01

Miniature, 1W, 1500Vrms Isolated

UNREGULATED DC/DC CONVERTERS

2000 Burr-Brown Corporation

PDS-1592A

Printed in U.S.A. April, 2000

DCV01

Series

International Airport Industrial Park · Mailing Address: PO Box 11400, Tucson, AZ 85734 · Street Address: 6730 S. Tucson Blvd., Tucson, AZ 85706 · Tel: (520) 746-1111

Twx: 910-952-1111 · Internet: http://www.burr-brown.com/ · Cable: BBRCORP · Telex: 066-6491 · FAX: (520) 889-1510 · Immediate Product Info: (800) 548-6132

FEATURES

UP TO 85% EFFICIENCY

THERMAL PROTECTION

DEVICE-TO-DEVICE SYNCHRONIZATION

SHORT CIRCUIT PROTECTION

EN55022 CLASS B EMC PERFORMANCE

UL1950 RECOGNIZED COMPONENT

JEDEC PDIP-14 AND GULL-WING PACKAGES

DESCRIPTION

The DCV01 series is a family of 1W, 1500Vrms
isolated, unregulated, isolated DC/DC converters. Re-
quiring a minimum of external components and in-
cluding on-chip device protection, the DCV01 series
provides extra features such as output disable and
synchronization of switching frequencies.

The use of a highly integrated package design results
in highly reliable products with a power density of
40W/in

(2.4W/cm

). This combination of features

high isolation and small size makes the DCV01 suit-
able for a wide range of applications.

APPLICATIONS

INDUSTRIAL CONTROL AND
INSTRUMENTATION

POINT-OF-USE POWER CONVERSION

GROUND LOOP ELIMINATION

DATA ACQUISITION

TEST EQUIPMENT

SECONDARY ISOLATION CIRCUITS

For most current data sheet and other product

information, visit www.burr-brown.com

BIAS

Power

Stage

OUT

Reset

800kHz

Oscillator

Watch-dog/

start-up

PSU

Thermal

Shutdown

SYNC

OUT

SYNC

Power Controller IC

DCV01

DCV01

The information provided herein is believed to be reliable; however, BURR-BROWN assumes no responsibility for inaccuracies or omissions. BURR-BROWN assumes
no responsibility for the use of this information, and all use of such information shall be entirely at the user's own risk. Prices and specifications are subject to change
without notice. No patent rights or licenses to any of the circuits described herein are implied or granted to any third party. BURR-BROWN does not authorize or warrant
any BURR-BROWN product for use in life support devices and/or systems.

INPUT

OUTPUT

LOAD

NO LOAD

BARRIER

LEAKAGE

VOLTAGE (V)

REGULATION (%)

CURRENT (mA)

EFFICIENCY (%)

CAPACITANCE (pF)

CURRENT (

NOM

ISO

75% LOAD

(2)

10% TO 100% LOAD

(3)

0% LOAD

100% LOAD

ISO

= 750Vrms

ISO

= 750Vrms

PRODUCT

MIN

TYP

MAX

MIN

TYP

MAX

TYP

MAX

TYP

DCV010505

4.5

5.5

4.75

5.25

3.6

0.9

DCV010505D

4.5

5.5

4.75

5.25

3.8

0.9

DCV010512

4.5

5.5

11.4

12.6

5.1

1.2

DCV010512D

4.5

5.5

11.4

12.6

4.0

1.0

DCV010515

4.5

5.5

14.25

15.75

3.8

0.9

DCV010515D

4.5

5.5

14.25

15.75

4.7

1.1

DCV011512D

(4)

13.5

16.5

11.4

12.6

4.2

1.0

DCV011515D

(4)

13.5

16.5

14.25

15.75

4.2

1.0

DCV012405

(4)

21.6

26.4

4.75

5.25

3.8

0.9

DCV012415D

(4)

21.6

26.4

14.25

15.75

5.3

1.3

NOTES: (1) During UL1950 recognition tests only, UL File #E199929. (2) 100% Load Current = 1W/V

NOM

TYP. (3) Load regulation = (V

OUT

at 10% V

OUT

at 100%)/ V

OUT

at 75%. (4) Scheduled availability

Q3 2000.

SPECIFICATIONS

At T

= +25

C, unless otherwise specified.

DCV01 SERIES

PARAMETER

CONDITIONS

MIN

TYP

MAX

UNITS

OUTPUT
Power

100% Full Load

0.97

Ripple

O/P Capacitor = 1

F, 50% Load

mVp-p

Voltage vs Temp

Room to Cold

0.046

Room to Hot

0.016

INPUT
Voltage Range on V

ISOLATION
Voltage

1s Flash Test

1.5

kVrms

60s Test, UL1950

(1)

1.5

kVrms

LINE
Regulation

%/1% of V

SWITCHING/SYNCHRONIZATION
Oscillator Frequency (f

OSC

)

Switching Frequency = f

OSC

800

kHz

Sync Input Low

0.4

Sync Input Current

SYNC

= +2V

Disable Time

Capacitance Loading on SYNC

External

RELIABILITY
Demonstrated

= +55

FITS

THERMAL SHUTDOWN
IC Temperature at Shutdown

150

Shutdown Current

TEMPERATURE RANGE
Operating

+85

DCV01

Basic Model Number: 1W Product
Voltage Input:

5V In

Voltage Output:

5V Out

Dual Output:
Package Code:

P = PDIP-14
P-U = PDIP-14 Gull-Wing

ELECTROSTATIC
DISCHARGE SENSITIVITY

This integrated circuit can be damaged by ESD. Burr-Brown
recommends that all integrated circuits be handled with
appropriate precautions. Failure to observe proper handling
and installation procedures can cause damage.

ESD damage can range from subtle performance degrada-
tion to complete device failure. Precision integrated circuits
may be more susceptible to damage because very small
parametric changes could cause the device not to meet its
published specifications.

Input Voltage:

5V Input Models .................................................................................. 7V
15V Input Models .............................................................................. 18V
24V Input Models .............................................................................. 29V

Storage Temperature ...................................................... 60

C to +125

Lead Temperature (soldering, 10s) ................................................. 270

ABSOLUTE MAXIMUM RATINGS

ORDERING INFORMATION

(

)

( D )

PACKAGE

SPECIFIED

DRAWING

TEMPERATURE

PACKAGE

ORDERING

TRANSPORT

PRODUCT

PACKAGE

NUMBER

RANGE

MARKING

NUMBER

(1)

MEDIA

Single
DCV010505P

DIP-14

010-1

C to +85

DCV010505P

Rails

DCV010505P-U

Gull-Wing-14

010-2

C to +85

DCV010505P-U

DCV010505P-U/700

Tape and Reel

DCV010512P

DIP-14

010-1

C to +85

DCV010512P

Rails

DCV010512P-U

Gull-Wing-14

010-2

C to +85

DCV010512P-U

DCV010512P-U/700

Tape and Reel

DCV010515P

DIP-14

010-1

C to +85

DCV010515P

Rails

DCV010515P-U

Gull-Wing-14

010-2

C to +85

DCV010515P-U

DCV010515P-U/700

Tape and Reel

DCV012405P

(2)

DIP-14

010-1

C to +85

DCV012405P

Tape and Reel

DCV012405P-U

(2)

Gull-Wing-14

010-2

C to +85

DCV012405P-U

DCV012405P-U/700

Rails

Dual
DCV010505DP

DIP-14

010-1

C to +85

DCV010505DP

Rails

DCV010505DP-U

Gull-Wing-14

010-2

C to +85

DCV010505DP-U

DCV010505DP-U/700

Tape and Reel

DCV010512DP

DIP-14

010-1

C to +85

DCV010512DP

Rails

DCV010512DP-U

Gull-Wing-14

010-2

C to +85

DCV010512DP-U

DCV010512DP-U/700

Tape and Reel

DCV010515DP

DIP-14

010-1

C to +85

DCV010515DP

Rails

DCV010515DP-U

Gull-Wing-14

010-2

C to +85

DCV010515DP-U

DCV010515DP-U/700

Tape and Reel

DCV011512DP

(2)

DIP-14

010-1

C to +85

DCV011512DP

Rails

DCV011512DP-U

(2)

DIP-14

010-2

C to +85

DCV011512DP-U

DCV011512DP-U/700

Tape and Reel

DCV011515DP

(2)

Gull-Wing-14

010-1

C to +85

DCV011515DP

Rails

DCV011515DP-U

(2)

DIP-14

010-2

C to +85

DCV011515DP-U

DCV011515DP-U/700

Tape and Reel

DCV012415DP

(2)

Gull-Wing-14

010-1

C to +85

DCV012415DP

Rails

DCV012415DP-U

(2)

DIP-14

010-2

C to +85

DCV012415DP-U

DCV012415DP-U/700

Tape and Reel

NOTE: (1) Models with a slash (/) are available only in Tape and Reel in the quantities indicated (e.g., /700 indicates 700 devices per reel). Ordering 700 pieces
of "DCP010505BP-U/700" will get a single 700-piece Tape and Reel. (2) Scheduled availability Q3, 2000.

PACKAGE/ORDERING INFORMATION

DCV01

DCV01

Top View

DIP

PIN CONFIGURATION (Single-DIP and Gull-Wing)

Top View

DIP

PIN CONFIGURATION (Dual-DIP and Gull-Wing)

PIN DEFINITION (Single-DIP)

PIN #

PIN NAME

DESCRIPTION

Voltage Input

Input Side Common

Output Side Common

OUT

+Voltage Out

Not Connected

SYNC

OUT

Unrectified Transformer Output

SYNC

Synchronization Pin

PIN DEFINITION (Dual-DIP)

PIN #

PIN NAME

DESCRIPTION

Voltage Input

Input Side Common

Output Side Common

OUT

+Voltage Out

OUT

Voltage Out

SYNC

OUT

Unrectified Transformer Output

SYNC

Synchronization Pin

DCV01D

OUT

SYNC

OUT

DCV01

OUT

SYNC

OUT

DCV01

TYPICAL PERFORMANCE CURVES

At T

= +25

C, unless otherwise noted.

DCV010505

OUTPUT RIPPLE vs LOAD (20MHz BW)

Load (%)

Ripple (mVp-p)

100

F Ceramic

4.7

F Ceramic

DCV010512D V

OUT

vs LOAD

Load (%)

OUT

(V)

14.5

14.0

13.5

13.0

12.5

12.0

11.5

11.0

10.5

10.00

100

OUT

DCV010512D EFFICIENCY vs LOAD

Load (%)

ficiency (%)

100

DCV010515D V

OUT

vs LOAD

Load (%)

OUT

(V)

100

OUT

DCV010515D EFFICIENCY vs LOAD

Load (%)

ficiency (%)

100

DCV012405 V

OUT

vs LOAD

Load (%)

OUT

(V)

5.60

5.50

5.40

5.30

5.20

5.10

5.00

4.90

4.80

100

DCV01

FIGURE 1. Connecting the DCV01 in Series.

FUNCTIONAL DESCRIPTION

OVERVIEW

The DCV01 offers up to 1W of unregulated output power
with a typical efficiency of up to 85%. This is achieved
through highly integrated packaging technology and the
implementation of a custom power stage and control IC. The
circuit design utilizes an advanced BiCMOS/DMOS pro-
cess. Separate primary and secondary transformer windings
give good isolation and low barrier capacitance.

POWER STAGE

This uses a push-pull, center-tapped topology switching at
400kHz (divide by 2 from 800kHz oscillator).

OSCILLATOR AND WATCHDOG

The onboard 800kHz oscillator generates the switching
frequency via a divide by 2 circuit. The oscillator can be
synchronized to other DCV01 circuits or an external source,
and is used to minimize system noise.

A watchdog circuit checks the operation of the oscillator
circuit. The oscillator can be stopped by pulling the SYNC

pin LOW. The output pins will be tri-stated. This will occur
in 2

THERMAL SHUTDOWN

The DCV01 is protected by a thermal shutdown circuit. If the
on-chip temperature exceeds 150

C, the device will shut

down. Once the temperature falls below 150

C, normal

operation will resume.

SYNCHRONIZATION

In the event that more than one DC/DC converter is needed
onboard, beat frequencies and other electrical interference
can be generated. This is due to the small variations in
switching frequencies between the DC/DC converters.

The DCV01 overcomes this by allowing devices to be
synchronized to one another. Up to eight devices can be
synchronized by connecting the SYNC

pins together, tak-

ing care to minimize the capacitance of tracking. Stray
capacitance (> 3pF) will have the effect of reducing the

switching frequency, or even stopping the oscillator circuit.

If synchronized devices are used, it should be noted that, at
start up, all devices will draw maximum current simulta-
neously. This can cause the input voltage to dip and should
it dip below the minimum input voltage (4.5V), the devices
may not start up. A 2.2

F capacitor should be connected

close to the input pins.

If more than eight devices are to be synchronized, it is
recommended that the SYNC

pins are driven by an exter-

nal device. Details are contained in a separate applications
bulletin (AB-153).

CONSTRUCTION

The DCV01's basic construction is the same as standard ICs.
There is no substrate within the molded package. The
DCV01 is constructed using an IC, rectifier diodes, and a
wound magnetic toroid on a leadframe. As there is no solder
within the package, the DCV01 does not require any special
PCB assembly processing. This results in an isolated
DC/DC converter with inherently high reliability.

ADDITIONAL FUNCTIONS

DISABLE/ENABLE

The DCV01 can be disabled or enabled by driving the SYNC
pin using an open drain CMOS gate. If the SYNC

pin is

pulled low, the DCV01 will be disabled. The disable time
depends upon the external loading; the internal disable func-
tion is implemented in 2

s. Removal of the pull down will

cause the DCV01 to be enabled.

Capacitive loading on the SYNC

pin should be minimized

in order to prevent a reduction in the oscillator frequency.

DECOUPLING

Ripple Reduction

The high switching frequency of 400kHz allows simple
filtering. To reduce ripple, it is recommended that at least a
1

F capacitor is used on V

OUT

. Dual outputs should both be

decoupled to pin 5. A 2.2

F low ESR capacitor on the input

of the 5V in versions, and a 0.47

F low ESR cap on the 24V

DCV01 in versions is recommended.

DCV

OUT 1

SUPPLY

DCV

OUT 2

OUT1

+ V

OUT 2

SYNC

COM

DCV01

FIGURE 2. Connecting Dual Outputs in Series.

Connecting the DCV01 in Series

Multiple DCV01 isolated 1W DC/DC converters can be
connected in series to provide nonstandard voltage rails.
This is possible by utilizing the floating outputs provided by
the DCV01's galvanic isolation.

Connect the positive V

OUT

from one DCV01 to the negative

OUT

(0V) of another (see Figure 1). If the SYNC

pins are

tied together, the self-synchronization feature of the DCV01
will prevent beat frequencies on the voltage rails. The
SYNC

feature of the DCV01 allows easy series connec-

tion without external filtering, minimizing cost.

The outputs on dual output DCV01 versions can also be
connected in series to provide two times the magnitude of
V

OUT

as shown in Figure 2. For example, a dual 15V DCV01

could be connected to provide a 30V rail.

Connecting the DCV01 in Parallel

If the output power from one DCV01 is not sufficient, it is
possible to parallel the outputs of multiple DCV01s, as
shown in Figure 3. Again, the SYNC

feature allows easy

synchronization to prevent power-rail beat frequencies at no
additional filtering cost.

PCB LAYOUT

Ripple and Noise

Careful consideration should be given to the layout of the
PCB in order that the best results can be obtained.

The DCV01 is a switching power supply and as such can
place high peak current demands on the input supply. In
order to avoid the supply falling momentarily during the fast
switching pulses ground and power planes should be used to
track the power to the input of DCV01. If this is not possible
then the supplies must be connected in a star formation with
the tracks made as wide as possible.

If the SYNC

pin is being used then the tracking between

device SYNC

pins should be short to avoid stray capaci-

tance. If the SYNC

pin is not being used it is advisable to

place a guard ring, (connected to input ground) around this
pin to avoid any noise pick up.

The output should be taken from the device using ground
and power planes, this will ensure minimum losses.

A good quality low ESR capacitor placed as close as
practicable across the input will reduce reflected ripple and
ensure a smooth start up.

A good quality low ESR capacitor placed as close as
practicable across the rectifier output terminal and output
ground will give the best ripple and noise performance.

THERMAL MANAGEMENT

Due to the high power density of this device it is advisable
to provide ground planes on the input and output.

FIGURE 3. Connecting Multiple DCV01s in Parallel.

DCV

OUT

SUPPLY

OUT

COM

DCV

OUT

SUPPLY

DCV

OUT

2 x Power Out

SYNC

COM

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