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

Application Notes

PT4220/4240 Series

Using the Remote On/Off with the PT4220/4240

Isolated 10W Excalibur DC/DC Converters

For applications requiring output voltage On/Off control,
the PT4220/4240 DC/DC converter series incorporates
a “Remote On/Off” control (pin 1). This feature can be
used to switch the module off without removing the
applied input source voltage.

The converter functions normally with Pin 1 open-circuit,
providing a regulated output voltage when a valid source
voltage is applied to +V
(pin 3). When a low-level 1 ground signal is applied to
pin 1, the converter output will be turned off.

Figure 1 shows an application schematic, which details
the typical use of the Remote On/Off function. Note the
discrete transistor (Q1). The pin has its own internal
pull-up, allowing it to be controlled with an open-collector
or open-drain device (See notes 2 & 3). Table 1 gives the
threshold requirements.

When placed in the “Off” state, the standby current drawn
from the input source is typically reduced to less than 1mA.

Table 1; Pin 1 Remote On/Off Control Parameters

Parameter Min Typ Max

Enable (VIH) 4.5V — —

Disable (VIL) — — 0.8V

V

[Open-Circuit] 5.0V

o/c

Iin [pin 1 at –V

in]

Notes:

1. The Remote On/Off control uses –Vin (pin 3) as its ground

reference. All voltages specified are with respect to –V

2. Use an open-collector device (preferably a discrete

transistor) for the Remote On/Off input. A pull-up resistor
is not necessary. To disable the output voltage, the control
pin should be pulled low to less than +0.8VDC.

3. The Remote On/Off pin may be controlled with devices that

have a totem-pole output. This is provided the drive
voltage meets the threshold requirements in Table 1.
Do not apply more than +20V. If a TTL gate is used, a
pull-up resistor may be required to the logic supply voltage.

4. The PT4220/4240 converters incorporate an “Under­Voltage Lockout” (UVLO). The UVLO will keep the
module off when the input voltage to the converter is
low, regardless of the state of the Remote On/Off control.
Table 2 gives the UVLO input voltage thresholds .

(pin 5), with respect to –V

in

1

— — –0.5mA

in

.

in

Table 2; UVLO Thresholds

Series Vin Range UVLO Threshold

PT4220 36 – 75V 32V ±2V

PT4240 18 – 36V 15.8V ±2V

4

Figure 1

+V

5 8, 9

in

+Vin

+Vout

+V

o

PT4220/4240

-V

in

1 =OFF

Note 1

Vdd

3

-Vin

Q1
BSS138

Note 1

R1

10k

U1a

Note 1

Remote

On/Off

1

6, 7

-Vout

(adj)

V

o

10

-V

o

Turn-On Time: In the circuit of Figure 1, turning Q1 on
applies a low-voltage to pin 1 and disables the converter
output. Correspondingly, turning Q

off allows pin 1 to

1

be pulled high by an internal pull-up resistor. The con­verter produces a regulated output voltage within 60ms.
Figure 2 shows shows the output response of a PT4223
(5.0V) following the turn-off of Q

. The turn off of Q

1

1

corresponds to the drop in Q1 Vgs. Although the rise­time of the output voltage is short (<5ms), the indicated
delay time will vary depending upon the input voltage
and the module’s internal timing. The waveform was
measured with a 48Vdc input voltage, and a 1.4A resis­tive load.

Figure 2

Vo (2V/Div)

Iin (0.2A/Div)

Delay Time

Q1Vgs (10V/Div)

HORIZ SCALE: 10ms/Div

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

Application Notes

PT4220/4240 Series

Adjusting the Output Voltage of the 10W-Rated
Excalibur™ Series of Isolated DC/DC Converters

The factory pre-set output voltage of Power Trends’ 10W
Excalibur series of isolated DC-DC converters may be
adjusted over a narrow range. This is accomplished with
the addition of a single external resistor. For the input
voltage range specified in the data sheet, Table 1 gives the
allowable adjustment range for each model as V

(min)

o

and Vo (max).

R

=

2

Where, Vo= Original output voltage

V
R

68.845

Va – V

= Adjusted output voltage

a

= Internal resistance (Table 1)

s

o

Notes:

Adjust Up: An increase in the output voltage is obtained
by adding a resistor, R
pins 6 & 7 (–V

out

Adjust Down: Add a resistor (R
and pins 8 & 9 (+V

between pin 10 (Vo adjust), and

2

).

), between pin 10 (Vo adjust)

1

).

out

1. Use only a single 1% resistor in either the (R1) or R
location. Place the resistor as close to the ISR as possible.

2. Never connect capacitors to V
added to the V

adjust control pin will affect the stability of

o

adjust. Any capacitance

o

the ISR.

3. The output power is limited to 10W. If the output

Refer to Figure 1 and Table 2 for both the placement and value
of the required resistor, (R

The values of (R

1

) or R2.

1

) [adjust down], and R2 [adjust up], can

also be calculated using the following formulas.

(R1) = 56.2 (Va – 1.225)

Vo – V

a

– R

Table 1

DC/DC CONVERTER ADJUSTMENT RANGE AND FORMULA PARAMETERS

Series Pt #

24V Bus PT4247 PT4246 PT4241 PT4245 PT4242 PT4243 PT4244
48V Bus PT4227 PT4226 PT4221 PT4225 PT4222 PT4223 PT4224

Rated Current

Vo(nom) 1.3V 1.5V 1.8V 2.5V 3.3V 5.0V 12.0V
Vo(min) 1.2V 1.45V 1.7V 2.25V 2.95V 4.5V 10.8V
Vo(max) 1.4V 1.65V 1.98V 2.75V 3.65V 5.5V 13.2V
Rs (k

3

3A 3A 3A 3A 3A 2A 0.85A

ΩΩ

Ω) 340.0 243.0 243.0 187.0 187.0 110.0 49.9

ΩΩ

kΩ

s

voltage is increased, the maximum load current must be
derated according to the following equation.

Io(max) =

10
V

a

In any instance, the load current must not exceed the
converter’s rated current (See Table 1).

– R

kΩ

s

2

Figure 1

+V

in

5 8, 9

+Vin

PT4220/4240

3

-Vin
Remote

-V

in

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

On/Off

1

V

(adj)

o

10

+Vout

-Vout

6, 7

(R1)
Adj Down

R2
Adjust Up

+V

–V

O

L
O
A
D

O

Application Notes

continued

PT4220/4240 Series

Table 2

DC/DC CONVERTER ADJUSTMENT RESISTOR VALUES

Series Pt #

24V Bus PT4247 PT4246 PT4241 PT4245 PT4242 PT4243 PT4244
48V Bus PT4227 PT4226 PT4221 PT4225 PT4222 PT4223 PT4224

Vo(nom) 1.3V 1.5V 1.8V 2.5V 3.3V 5.0V 12.0V
Va(req’d) Va(req’d)

1.2 (0.0)kΩ

1.25 (340.0)kΩ

1.3

1.35 340.0kΩ

1.4 0.0.0kΩ

1.45 (9.9)kΩ

1.5

1.55 1130.0kΩ

1.6 445.0kΩ

1.65 216.0kΩ

1.7 (23.9)kΩ

1.75 (347.0)kΩ

1.8

1.85 1130.0kΩ

1.9 445.0kΩ

1.95 216.0kΩ

2.25 (43.4)kΩ

2.3 (115.0)kΩ

2.35 (235.0)kΩ

2.4 (473.0)kΩ

2.45 (1190.0)kΩ

2.5

2.55 1190.0kΩ

2.6 501.0kΩ

2.65 272.0kΩ

2.7 157.0kΩ

2.75 88.4kΩ

2.95 (90.0)kΩ

3.0 (146.0)kΩ

3.05 (223.0)kΩ

3.1 (340.0)kΩ

3.15 (534.0)kΩ

3.2 (923.0)kΩ

3.25 (2090.0)kΩ

3.3

3.35 1190.0kΩ

3.4 501.0kΩ

3.45 272.0kΩ

3.5 157.0kΩ

3.55 88.4kΩ

3.6 42.5kΩ

3.65 9.7kΩ

R1 = (Blue) R2 = Black

4.5 (258.0)kΩ

4.6 (364.0)kΩ

4.7 (541.0)kΩ

4.8 (895.0)kΩ

4.9 (1960.0)kΩ

5.0

5.1 578.0kΩ

5.2 234.0kΩ

5.3 119.0kΩ

5.4 62.1kΩ

5.5 27.7kΩ

10.8 (399.0)kΩ

11.0 (499.0)kΩ

11.5 (1110.0)kΩ

12.0

12.5 87.8kΩ

13.0 18.9kΩ

13.2 7.5kΩ

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

PACKAGE OPTION ADDENDUM

www.ti.com

13-Oct-2005

PACKAGING INFORMATION

Orderable Device Status

PT4221A ACTIVE SIP MOD

(1)

Package

Type

Package
Drawing

Pins Package

Qty

Eco Plan

EPF 10 15 TBD Call TI Level-1-215C-UNLIM

ULE

PT4222A ACTIVE SIP MOD

EPF 10 15 TBD Call TI Level-1-215C-UNLIM

ULE

PT4222C ACTIVE SIP MOD

EPG 10 15 TBD Call TI Level-3-215C-168HRS

ULE

PT4223A ACTIVE SIP MOD

EPF 10 15 TBD Call TI Level-1-215C-UNLIM

ULE

PT4223C ACTIVE SIP MOD

EPG 10 15 TBD Call TI Level-3-215C-168HRS

ULE

PT4224A ACTIVE SIP MOD

EPF 10 15 TBD Call TI Level-1-215C-UNLIM

ULE

PT4224C ACTIVE SIP MOD

EPG 10 15 TBD Call TI Level-3-215C-168HRS

ULE

PT4224N ACTIVE SIP MOD

EPE 10 15 TBD Call TI Level-1-215C-UNLIM

ULE

PT4227A ACTIVE SIP MOD

EPF 10 15 TBD Call TI Level-1-215C-UNLIM

ULE

PT4227C ACTIVE SIP MOD

EPG 10 15 TBD Call TI Level-3-215C-168HRS

ULE

PT4227N ACTIVE SIP MOD

EPE 10 15 TBD Call TI Level-1-215C-UNLIM

ULE

(1)

The marketing status values are defined as follows:

ACTIVE: Product device recommended for new designs.
LIFEBUY: TI has announced that the device will be discontinued, and a lifetime-buy period is in effect.
NRND: Not recommended for new designs. Device is in production to support existing customers, but TI does not recommend using this part in

a new design.

PREVIEW: Device has been announced but is not in production. Samples may or may not be available.
OBSOLETE: TI has discontinued the production of the device.

(2)

Lead/Ball Finish MSLPeak Temp

(3)

(2)

Eco Plan - The planned eco-friendly classification: Pb-Free (RoHS) or Green (RoHS & no Sb/Br) - please check

http://www.ti.com/productcontent for the latest availability information and additional product content details.

TBD: The Pb-Free/Green conversion plan has not been defined.
Pb-Free (RoHS): TI's terms "Lead-Free" or "Pb-Free" mean semiconductor products that are compatible with the current RoHS requirements

for all 6 substances, including the requirement that lead not exceed 0.1% by weight in homogeneous materials. Where designed to be soldered
at high temperatures, TI Pb-Free products are suitable for use in specified lead-free processes.
Green (RoHS & no Sb/Br): TI defines "Green" to mean Pb-Free (RoHS compatible), and free of Bromine (Br) and Antimony (Sb) based flame
retardants (Br or Sb do not exceed 0.1% by weight in homogeneous material)

(3)

MSL, Peak Temp. -- The Moisture Sensitivity Level rating according to the JEDEC industry standard classifications, and peak solder

temperature.

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Addendum-Page 1

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