Texas Instruments PT4205A, PT4205C, PT4206A, PT4206C Datasheet

For assistance or to order, call [phone]

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j

PT4205

Series

3-7 WATT 24V INPUT
ISOLATED DC-DC CONVERTER

Application Notes

Mechanical Outline

Product Selector Guide

Revised 5/15/98

• Wide Input Voltage Range:

18V to 36V

• 84% Efficiency

• 1,500 VDC Isolation

• 18 Pin - DIP Package

• 3.5 Million Hour MTBF

• Meets FCC/EN55022 Class A

• UL and CSA approved

DC converters advance the state-of-the-art for board­mounted converters by employing high switching
frequencies, thick-film technology and a high degree
of silicon integration. The high reliability and very low
package height makes these converters ideal for
Telecom and Datacom applications requiring input­to-output isolation with board spacing down to 0.6”.

• No External Components Required

• Adjustable Output Voltage

through-hole or SMD-DIP package with single
output voltages of 3.3V and 5V.

Standard Application

18

1

+Vout

2

-Vout
3
4

NC

5
6

nc

7

S

Vad

8

NOR

9

Specifications

Characteristics
(Ta = 25°C unless noted) Symbols Conditions Min Typ Max Units

Output Current I

Current Limit I

On/Off Standby Current I
Short Circuit Current I

Inrush Current I

Input Voltage Range V
Output Voltage Tolerance ∆V
Idling Voltage V

Ripple Rejection RR Over Vin range @ 120 Hz — 60 — dB
Line Regulation Reg
Load Regulation Reg
Vo Ripple/Noise V
Transient Response t

Efficiency η Vin=24V, Io=1.8A, Vo=3.3V — 79 — %

Switching Frequency ƒ
Pin Temperature T
Operating Temperature T

Storage Temperature T
Mechanical Shock — Per Mil-STD-202F, Method 213B,

Mechanical Vibration — Per Mil-STD-202F, Method 204D,

Weight — — — 20 — grams
Isolation — — 1500 — — VDC
Flammability — Materials meet UL 94V-0

** Minimum input voltage is adjustable - See application note.

o

cl

in standby

sc

ir

t

ir

in

o

n

tr

o

p

a

s

Over Vin range Vo = 3.3V 0 — 1.8 A

Vin = 24V Vo = 3.3V 2.0 — 3.0 A

Vin = 24V, Pin 11 = -V
Vin = 24V Vo = 3.3V — 2.5 — A

Vin = 24V @ max I
On start-up — 1.0 2.0 mSec

Over Io Range 18** 24 36 V
Over Io Range — ±4 — %Vo

o

Io = 0A Vo = 3.3V — 3.65 4.0 V

Over Vin range @ max I

line

10% to 100% of Io max — ±3 — %V

load

Vin=24V, Io=Io max — 30 70 mV
50% load change — 100 300 µSec

Vo over/undershoot — 3.0 5.0 %V

Vin=24V, Io=1.2A, Vo=5V — 84 — %
Over Vin and I
@ Pin 1 — — +95 °C
Vin = 24V @ max I

Free air convection, (40-60LFM)
— -55 — +125 °C

6mS, half-sine, mounted to a PCB

10-500Hz, mounted to a PCB

PT4205

Vo = 5V 0 — 1.2 A

Vo = 5V 1.3 1.6 2.4 A

in

Vo = 5V — 2.0 — A

o

Vo = 5V — 5.6 6.0 V

o

o

-Vin

17

+Vin
16
15

NC

14
13
12
11

RC
10

TOA

PT4205 SERIES

— 0.5 — mA

— 0.6 1.0 A

o

— ±0.5 — %V

520 — 688 kHz

-40 — +85 °C

—50—G’s

—10—G’s

Power Trends’ PT4205 series of isolated DC to

The PT4205 series is offered in a unique molded

Pin-Out Information

Pin Function

1V

out

2V
3 Do not connect
4 Do not connect
5 Do not connect
6 Do not connect
7 Sync input

8* V

9*

10

11 Remote on/off
12 Do not connect
13 Do not connect
14 Do not connect
15 Do not connect
16 Do not connect

o

o

pp

o

17 +V
18 -V

* Please note that when the
Vout adjust is not used, pin 8
must be connected to pin 9.

return

out

adj

Nominal output

voltage resistor

Turn-on/off input

voltage adjust

in

in

Ordering Information

Through-Hole

PT4205A = 3.3V/1.8A
PT4206A = 5V/1.2A

Surface Mount

PT4205C = 3.3V/1.8A
PT4206C = 5V/1.2A

(For dimensions and PC
board layout, see Package
Style 900.)

60

Power Trends, Inc. 27715 Diehl Road, Warrenville, IL 60555 [phone] Fax: [phone] http://www.powertrends.com

For assistance or to order, call [phone]

PT4205 Series

CHARACTERISTIC DATA

PT4205, 3.3 VDC (See Note 1) PT4206 5.0 VDC (See Note 1)

Efficiency vs Output Current Efficiency vs Output Current

100

90

80

70

Efficiency (%)

60

50

40

0 0.3 0.6 0.9 1.2 1.5

Vin

18.0V

24.0V

30.0V

36.0V

Output Current (Amps)

Ripple vs Output Current Ripple vs Output Current

35

30

25

20

Ripple (mVpp)

15

10

5

0

0 0.3 0.6 0.9 1.2 1.5 1.8

Output Current (Amps)

Vin

36.0V

30.0V

24.0V

18.0V

100

90

80

70

Efficiency (%)

60

50

40

0 0.2 0.4 0.6 0.8 1 1.2

Output Current (Amps)

18
16
14
12
10

Ripple (mVpp)

8
6
4
2
0

0 0.2 0.4 0.6 0.8 1 1.2

Output Current (Amps)

DATA SHEETS

24V Bus Products

Vin

18.0V

24.0V

30.0V

36.0V

Vin

36.0V

30.0V

24.0V

18.0V

Power Dissipation vs Output Current Power Dissipation vs Output Current

2.5

2

1.5

Pd (Watts)

1

0.5

0

0 0.3 0.6 0.9 1.2 1.5

Vin

36.0V

30.0V

24.0V

18.0V

Output Current (Amps)

Note 1: All data listed in the above graphs, except for derating data, has been developed from actual products tested at 25°C. This data is considered typical data for the isolated DC-DC converter.

1.8

1.6

1.4

1.2

1

Pd (Watts)

0.8

0.6

0.4

0.2

0

0 0.2 0.4 0.6 0.8 1 1.2

Output Current (Amps)

Vin

36.0V

30.0V

24.0V

18.0V

Power Trends, Inc. 27715 Diehl Road, Warrenville, IL 60555 [phone] Fax: [phone] http://www.powertrends.com

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