Product # PQ60280FTA26

Phone 1-888-567-9596

www.synqor.com

Doc.# 005-2FT628P Rev. C

5/21/08

Page 4

T

pecification

Input:

Input:

Output:

Output:

Current:

Current:

ackage:

36-75 V

36-75 V

28 V

28 V

26 A

26 A

Full-brick

Full-brick

Parameter

Min.

Typ.

Max.

Units

Notes & Conditions

ABSOLUTE MAXIMUM RATINGS

Input Voltage

Non-Operating

100

V

Continuous

Operating

80

V

Continuous

Operating Transient Protection

100

V

100ms transient

Isolation Voltage (input to output)

2250

V

Basic insulation level, Pollution degree 2

Operating Temperature

-40

100

°C

Storage Temperature

-55

125

°C

Voltage at ON/OFF input pin

-2

18

V

INPUT CHARACTERISTICS

Operating Input Voltage Range

36

48

75

V

Input Under-Voltage Lockout

Turn-On Voltage Threshold

31.5

33.3

34.7

V

Turn-Off Voltage Threshold

29.5

31.0

32.4

V

Lockout Voltage Hysteresis

2.3

V

Maximum Input Current

22.0

A

100% Load, 36 Vin

No-Load Input Current

220

250

mA

Disabled Input Current

42

65

mA

Inrush Current Transient Rating

0.1

Input Reflected Ripple Current

60

mA

RMS thru 4.7µH inductor; Figures 11 & 13

Input Terminal Ripple Current

3

A

RMS; Figures 11 & 12

Recommended Input Fuse

30

A

Fast blow external fuse recommended

Input Filter Component Values (L\C)

0.2 \ 8.0

µH\µF

Internal values

Recommended External Input Capacitance

200

µF

11

Recommended External Input Capacitor ESR1

0.04

0.20

1.00

W

100kHz, -40ºC to 100ºC

OUTPUT CHARACTERISTICS

Output Voltage Set Point

27.75

28.00

28.25

V

Output Voltage Regulation

Over Line

+0.05 \ 28 +0.10 \ 28 %\mV

Over Load

+0.1 \ 28 +0.2 \ 56

%\mV

Over Temperature

+45

+90

mV

Total Output Voltage Range

27.50

28.50

V

Over sample, line, load, temperature & life

20MHz bandwidth; Figures 11 & 14

Peak-to-Peak

180

250

mV

Full Load; see Figures 11 & 14

RMS

40

50

mV

Full Load; see Figures 11 & 14

Operating Output Current Range

0

26

A

Subject to thermal derating; Figures 5 - 6

Output DC Current-Limit Inception

28.0

30.2

32.0

A

Output Voltage 10% Low; Figure 22

Back-Drive Current-Limit While Enabled

1.50

3.40

5.00

A

Negative current drawn from output

Back-Drive Current-Limit While Disabled

0.14

0.30

0.45

A

Negative current drawn from output

Current Share Accuracy (2 units paralleled)

2.5

A

Maximum Output Capacitance

4,000

µF

28Vout at 26A Resistive Load

DYNAMIC CHARACTERISTICS

Input Voltage Ripple Rejection

30

dB

120 Hz; Figure 18

Output Voltage during Load Current Transient

For a Step Change in Output Current (0.1A/µs)

1500

mV

50-75-50% Iout max; 47µF cap; Figure 9

For a Step Change in Output Current (5A/µs)

800

mV

50-75-50% Iout max; 47µF cap; Figure 10

Settling Time

150

µs

To within 1% Vout nom

Turn-On Transient

Turn-On Time

25

30

35

ms

Full load, Vout=90% nom.; Figures 7 & 8

Startup Delay:

2

ms

First Startup Delay:

200

ms

Restart Inhibit Delay:

320

ms

Output Voltage Overshoot

0

%

4,000 µF load capacitance, Iout = 26A resistive load

EFFICIENCY

100% Load

95

%

Figures 1 - 4 (Figure 21 for baseplated)

50% Load

96

%

Figures 1 - 4 (Figure 21 for baseplated)

TEMPERATURE LIMITS FOR POWER DERATING CURVES

Semiconductor Junction Temperature

125

°C

Package rated to 150°C

Board Temperature

125

°C

UL rated max operating temp 130°C

Transformer Temperature

125

°C

See Figures 5 - 6 for derating curve

100

°C

Applies to baseplated units only

ISOLATION CHARACTERISTICS

Isolation Voltage (dielectric strength)

2250

V

Isolation Resistance

30

3300

pF

PQ60280FTA26 ELECTRICAL CHARACTERISTICS

temperature with appropriate power derating. Specifications subject to change without notice.

Note 1: For applications requiring reduced output voltage ripple and noise, consult SynQor applications support (e-mail: support@synqor.com)

Note 2: There is no derating with a baseplate temperature of 100ºC or lower.

Note 3: Higher values of isolation capacitance can be added external to the module.