TEXAS INSTRUMENTS SLTS127A Technical data

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PT4220 Series

10-W Low-Profile 48V-Input
Isolated DC/DC Converter

Description

The PT4220 power modules are a
series of DC/DC converters housed in
an ultra-low profile (8mm) solderable
copper case. The series includes a num­ber of preset output voltages ranging
from 1.3V
for Telecom use. They may also be used
in many other applications that require
input-output isolation over an extended
temperature range. The modules are an
ideal choice for low-power digital and
analog circuits, including DSPs and
microcontrollers. The flexibility of
input-output isolation also allows the
output to be configured for negative
voltage operation.

in both horizontal and vertical pin con­figurations, including surface mount.

†

up to 12V, all fully approved

The PT4220 series is made available

Features

• 10W Output Power

• Input Voltage: 36V to 75V

• Output Voltages:

1.2V to 13.2V

• 1500 VDC Isolation

• Temp Range: –40°C to +85°C

• Remote On/Off Control

• Undervoltage Lockout

• Output Current Limit

Ordering Information

PT4221¨ =1.8V/3A (5.4W)
PT4222¨ =3.3V/3A
PT4223¨ =5.0V/2A
PT4224¨ =12.0V/0.85A
PT4225¨ =2.5V/3A (7.5W)
PT4226¨ =1.5V/3A (4.5W)

† PT4227¨ =1.3V/3A (3.9W)

† Adjustable to 1.2V

PT Series Suffix

Case/Pin Order Package
Configuration Suffix Code

Vertical N (EPE)
Horizontal A (EPF)
SMD C (EPG)

(Reference the applicable package code draw­ing for the dimensions and PC board layout)

(PT1234x)

SLTS127A

(Revised 1/14/2002)

• Short-Circuit Protection

• Low-Profile Package (8mm)

• Space Saving Package

• Solderable Copper Case

• Safety Agency Approvals:

UL 60950
CSA 22.2 60950

Pin-Out Information

Pin Function

1 Remote On/Off *

2 Do not connect

3–V

in

4 Do not connect

5+V

in

6-V

out

7-V

out

8+V

out

9+V

out

10 V

Adj *

out

* For further information, see

application notes.

Standard Application

+V

in

58, 9

+Vin

3

-Vin

-V

in

For technical support and more information, see inside back cover or visit www.ti.com

PT4220

Remote

On/Off

1

+V

out

+Vout

6, 7

–Vout

V

(adj)

o

10

-V

L
O
A
D

out

PT4220 Series

10-W Low-Profile 48V-Input
Isolated DC/DC Converter

Specifications (Unless otherwise stated, T

=25°C, Vin =48V, Cin =0µF, C

a

=0µF, and Io =Iomax)

out

PT4220 SERIES

Characteristic Symbol Conditions Min Typ Max Units

Output Current I

Input Voltage Range V

o

in

Over Vin range V

Over Io Range 36.0 48.0 75.0 VDC

≤ 3.3V 0.1

o

=5.0V 0.1

V

o

V

= 12V 0.1

o

Set Point Voltage Tolerance Vo tol —±1±2%V
Temperature Variation Reg
Line Regulation Reg
Load Regulation Reg
Total Output Voltage Variation ∆V

temp

line

load

tot Includes set-point, line, load,

o

Efficiency η V

Ripple (pk-pk) V

V

o

Transient Response t

Output Voltage Adjust V
Current Limit Threshold I
Switching Frequency ƒ

∆V

r

tr

tr

adj

lim

s

–40° ≤Ta ≤ +85°C, I

=Iomin — ±0.2 — %V

o

Over Vin range — ±1 — mV
Over Io range — ±5 — mV

–40° ≤Ta ≤ +85°C

= 12 V — 87 —

o

= 5.0V — 85 —

V

o

= 3.3V — 81 —

V

o

= 2.5V — 78 — %

V

o

Vo = 1.8V — 73 —

= 1.5V — 71 —

V

o

Vo = 1.3V — 65 —

20MHz bandwidth V

≤ 5.0V — 50 —

o

V

= 12V — 100 —

o

1A/µs load step, 50% to 100% Iomax — 75 — µs
Vo over/undershoot V

V

=36V, ∆V

in

= –1 % — 150 — %Iomax

o

≤ 5.0V — ±150 —

o

V

= 12V — ±350 —

o

V

≥2.5V ±10 — — %V

o

Over Vin range 250 300 350 kHz

(1)

—3

(1)

—2

(1)

— 0.85

— ±1.5 ±3 %V

mV

mV

o

o

o

pp

o

Under-Voltage Lockout UVLO — 32 — V
Remote On/Off (Pin 1) Referenced to –Vin (pin 3)

Input High Voltage V
Input Low Voltage V

Input Low Current I

IH
IL

IL

4.5 — Open
–0.2 — +0.8

— –0.5 — mA

(3)

V

Standby Input Current Iin standby pins 1 & 3 connected — 1 — mA
Internal Input Capacitance C
External Output Capacitance C

Isolation Voltage Input–output/input–case 1500 — — V
Capacitance Input to output — 1,100 — pF
Resistance Input to output 10 — — MΩ

Operating Temperature Range T
Storage Temperature T
Reliability MTBF Per Bellcore TR-332

Mechanical Shock — Per Mil-Std-883D, method 2002.3, — 500 — G’s

Mechanical Vibration — Mil-Std-883D, Method 2007.2

in

out

a

s

Over Vin range -40 — +85
— -40 — +125 °C

V

≤ 5.0V 0

o

Vo = 12 V 0

50% stress, Ta =40°C, ground benign

1mS, half-sine, mounted to a fixture

20-2000Hz, all case styles soldered to PC

— 0.66 — µF

(5)

— 1000 µF

(5)

— 330

(4)

4.7 — — 10

(6)

— 20

—G’s

°C

6

Hrs

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

Notes: (1) The DC/DC converter will operate at no load with reduced specifications.

(2) The maximum output current reduces the output power of the following devices to less than 10W:-

PT4225 =7.5W; PT4221 =5.4W; PT4226 =4.5W; PT4227 =3.9W.

(3) The Remote On/Off (pin 1) has an internal pull-up, and if it is left open circuit the converter will operate when input power is applied. The open-circuit

voltage is typically 5V. Refer to the application notes for interface considerations.
(4) See Safe Operating Area curves or contact the factory for the appropriate derating.
(5) An output capacitor is not required for proper operation.
(6) The case pins on through-hole pin configurations (N & A) must be soldered. For more information see the applicable package outline drawing.

For technical support and more information, see inside back cover or visit www.ti.com

PT4220 Series

10-W Low-Profile 48V-Input
Isolated DC/DC Converter

T ypical Characteristics

PT4222, Vo =3.3VDC (See Note A)

Efficiency vs Output Current

90

85

80

75

70

Efficiency - %

65

60

0 0.5 1 1.5 2 2.5 3

Iout (A)

Output Ripple vs Output Current

70
60

50

40

30

Ripple - mV

20

10

0

0 0.5 1 1.5 2 2.5 3

Iout (A)

V

IN

36.0V

48.0V

60.0V

75.0V

V

IN

36.0V

48.0V

60.0V

75.0V

PT4223, Vo =5.0VDC (See Note A)

Efficiency vs Output Current

90

80

70

Efficiency - %

60

50

0 0.4 0.8 1.2 1.6 2

Iout (A)

Output Ripple vs Output Current

50

40

30

20

Ripple - mV

10

0

0 0.4 0.8 1.2 1.6 2

Iout (A)

V

36.0V

48.0V

60.0V

75.0V

V

36.0V

48.0V

60.0V

75.0V

PT4224, Vo =12.0VDC (See Note A)

Efficiency vs Output Current

90

80

IN

70

Efficiency - %

60

50

0 0.2 0.4 0.6 0.8 1

Iout (A)

Output Ripple vs Output Current

120

100

IN

80

60

Ripple - mV

40

20

0

0 0.2 0.4 0.6 0.8 1

Iout (A)

V

IN

36.0V

48.0V

60.0V

75.0V

V

IN

36.0V

48.0V

60.0V

75.0V

Power Dissipation vs Output Current

3

2.5

2

1.5

Pd - Watts

1

0.5

0

0 0.5 1 1.5 2 2.5 3

Iout (A)

Safe Operating Area @Vin =48V (Note B)

90

80

70

60

50

40

30

Ambient Temperature (°C)

20

0 0.5 1 1.5 2 2.5 3

Note A: Characteristic data has been developed from actual products tested at 25°C. This data is considered typical data for the Converter.
Note B: SOA curves represent the conditions at which internal components are at or below the manufacturer’s maximum operating temperatures

Iout (A)

V

IN

75.0V

60.0V

48.0V

36.0V

Airflow

200LFM
120LFM
60LFM
Nat conv

Power Dissipation vs Output Current

2

1.6

1.2

0.8

Pd - Watts

0.4

0

0 0.4 0.8 1.2 1.6 2

Iout (A)

Safe Operating Area @Vin =48V (Note B)

90

80

70

60

50

40

30

Ambient Temperature (°C)

20

0 0.4 0.8 1.2 1.6 2

Iout (A)

V

IN

75.0V

60.0V

48.0V

36.0V

Airflow

200LFM
120LFM
60LFM
Nat conv

Power Dissipation vs Output Current

1.6

1.2

0.8

Pd - Watts

0.4

0

0 0.2 0.4 0.6 0.8 1

Safe Operating Area @Vin =48V (Note B)

90

80

70

60

50

40

30

Ambient Temperature (°C)

20

0 0.2 0.4 0.6 0.8 1

Iout (A)

Iout (A)

V

75.0V

60.0V

48.0V

36.0V

Airflow

200LFM
120LFM
60LFM
Nat conv

IN

For technical support and more information, see inside back cover or visit www.ti.com