PT3400_14 datasheet(2/15 Pages) TI1

Part #	PT3400

Description	35W Output Power

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

PT3400 Series

35-W 48-V Input Isolated

DC/DC Converter

SLTS164B - JULY 2002 - REVISED OCTOBER 2002

Specifications (Unless otherwise stated, Ta =25°C, Vin =48V, Cin =0µF, Io =Iomax, and Cout as required)

PT3400 Series

Characteristic

Symbol

Conditions

Min

Typ

Max

Units

Output Current

Io

Over Vin range

Vo ≤ 1.5V

0

—

16

Vo = 1.8V/2.5V

0

—

12

A

Vo =3.3V

0

—

10

Vo = 5V

0

—

7

Input Voltage Range

Vin

Over Io Range

36

48

75

VDC

Set Point Voltage Tolerance

Vo tol

—

±1±2%Vo

Temperature Variation

Regtemp

–40°

≤Ta ≤ +85°C, Io =Iomin

—

±0.8

—

%Vo

Line Regulation

Regline

Over Vin range

Vo = 5.0V

—

±5

±20

mV

Vo ≤ 3.3V

—

±5

±15

mV

Load Regulation

Regload

Over Io range

Vo = 5.0V

—

±1

±15 (1)

mV

Vo ≤ 3.3V

—

±1

±10 (1)

mV

Total Output Voltage Variation

∆Votot

Includes set-point, line, load,

—

±2±3%Vo

–40°

≤Ta ≤ +85°C

Efficiency

η

Io =70% of Iomax

Vo = 5V

—

91

—

Vo = 3.3V

—

90

—

Vo = 2.5V

—

89

—

Vo = 1.8V

—

85

—

%

Vo = 1.5V

—

84

—

Vo = 1.4V

—

84

—

Vo = 1.2V

—

82

—

Vo = 1V

—

80

—

Vo Ripple (pk-pk)

Vr

20MHz bandwidth

Vo ≥3.3V

—

50

—

mVpp

Vo ≤ 2.5V

—

25

—

Transient Response

ttr

0.1A/µs load step, 50% to 75% Iomax

—

100

—

µs

∆Vtr

Vo over/undershoot

—

±4

—

%Vo

Output Adjust

Vadj

Vo ≥ 2.5V

–5

—

+5

%Vo

Vo ≤ 1.8V

–0

—

+10

Over-Current Threshold

ITRIP

Vin =36V

Vo = 5.0V

—

9

—

Vo = 3.3V

—

12.5

—

Vo = 2.5V/1.8V

—

16

—

A

Vo ≤ 1.5V

—

20

—

Switching Frequencyƒs

Over Vin range

250

300

350

kHz

Under-Voltage Lockout

UVLO

Rising

—

34

—

V

Falling

—

32

—

Enable On/Off (Pins 1, 2)

Referenced to –Vin (pin 3)

Input High Voltage

VIH

5

—

Open (2)

V

Input Low Voltage

VIL

–0.3

—

+0.4

Input Low Current

IIL

—

0.5

—

mA

Standby Input Current

Iin standbypins 1 & 3 connected

—

5

—

mA

Internal Input Capacitance

Cin

—

1.0

—

µF

External Output Capacitance

Cout

Vo=1.0V

470 (3)

—

TBD

Vo≤1.8V

330 (3)

—

TBD

µF

Vo≥2.5V

0

—

TBD

Isolation Voltage

Input–output/input–case

1500

—

V

Capacitance

Input to output

—

1500

—

pF

Resistance

Input to output

10

—

M

Ω

Operating Temperature Range

Ta

Over Vin range

–40 (4)

—

85 (5)

°C

Solder Reflow Temperature

Treflow

Surface temperature of module pins or case

—

215 (6)

°C

Storage Temperature

Ts

—

–40

—

125

°C

ReliabilityMTBF

Per Bellcore TR-332

2.8

—

106 Hrs

50% stress, Ta =40°C, ground benign

Mechanical Shock

—

Per Mil-Std-883D, method 2002.3,

—

TBD

—

G’s

1mS, half-sine, mounted to a fixture

Mechanical Vibration

—

Mil-Std-883D, Method 2007.2,

Vertical

—

TBD (7)

—

G’s

20-2000Hz, PCB mounted

Horizontal

—

TBD (7)

—

Weight

—

34

—

grams

Flammability—

Materials meet UL 94V-0

Notes:

(1) If the remote sense feature is not being used, –Vsense (pin 7) must be connected to –Vout (pin 8).

(2) The On/Off Enable inputs (pins 1 & 2) have internal pull-ups. They may either be connected to –Vin or left open circuit. Leaving pin 1 open-circuit and

connecting pin 2 to –Vin allows the the converter to operate when input power is applied. The maximum open-circuit voltage of the Enable pins is 10V.

(3) An output capacitor is required for proper operation for all models in which the output voltage is 1.8VDC or less. For models with an output voltage of

2.5V or higher an output capacitor is optional.

(4) For operation below 0°C, Cout must have stable characteristics. Use low ESR tantalum capacitors, or capacitors with a polymer type dielectric.

(5) See Safe Operating Area curves or contact the factory for the appropriate derating.

(6) During reflow of SMD package version do not elevate the module case, pins, or internal component temperatures above a peak of 215°C. For further

guidance refer to the application note, “Reflow Soldering Requirements for Plug-in Surface Mount Products,” (SLTA051).

(7) The case pins on through-hole pin configurations (N & A) must be soldered. For more information see the applicable package outline drawing.

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