Product # DQ62412QKA02

Phone 1-888-567-9596

Doc.# 005-2DQ245L Rev. A

06/08/05

Page 3

T

pecification

Input:

Input:

Outputs:

Outputs:

Current:

Current:

ackage:

35-75V

35-75V

2.45V & 1.225V

2.45V & 1.225V

20W

20W

Quarter-brick

Quarter-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, square wave

Isolation Voltage (input to output)

2000

V

Basic insulation, 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

35

48

75

V

Input Under-Voltage Lockout

Turn-On Voltage Threshold

32

33

34

V

Turn-Off Voltage Threshold

28.5

29.5

30.5

V

Lockout Voltage Hysteresis

2.5

3.5

4.5

V

Maximum Input Current

0.8

A

100% Load, 35 Vin

No-Load Input Current

40

mA

Disabled Input Current

2

5

mA

Inrush Current Transient Rating

0.01

Response to Input Transient

150

mV

1000V/ms input transient

Input Reflected Ripple Current

4

mA

RMS thru 10µH inductor; Figures 23 & 25

Input Terminal Ripple Current

30

mA

RMS; Figures 23 & 24

Recommended Input Fuse

20

A

Fast blow external fuse recommended

Input Filter Component Values (C\L)

2.2\4.7

µF\µH

Internal values, see Figure E

Recommended External Input Capacitance

47

µF

Typical ESR 0.1-0.2

OUTPUT CHARACTERISTICS

Output Voltage Set Point (1.225V)

1.225

V

48Vin, 50% load on each voltage

Output Voltage Set Point (2.45V)

2.45

V

48Vin, 50% load on each voltage

Total Output Voltage Regulation (1.225V)

1.17

1.27

V

Cross regulation, line, load, temp; Figures 7 - 10

Total Output Voltage Regulation (2.45V)

2.35

2.70

V

Cross regulation, line, load, temp; Figures 7 - 10

20MHz bandwidth; Figures 23 & 26

Peak-to-Peak

50

100

mV

Full Load, see Figures 23 & 26

RMS

10

20

mV

Full Load, see Figures 23 & 26

Operating Output Current Range (1.225V)

0

16

A

Subject to thermal derating; Figures 11 - 18

Operating Output Current Range (2.45V)

0

8

A

Subject to thermal derating; Figures 11 - 18

Output DC Current-Limit Inception (1.225V)

17.6

19.2

20.8

A

Output Voltage 10% Low; Figures 27 - 28

Output DC Current-Limit Inception (2.45V)

8.8

9.6

10.4

A

Output Voltage 10% Low; Figures 27 - 28

25.6

A

Figures 29-30

12.8

A

Figures 29-30

0.8\1.6

V

0.5

A

Negative current drawn from output

2

A

Negative current drawn from output

2,000

µF

20W load; 5% overshoot at Vout at startup

2,000

µF

20W load; 5% overshoot at Vout at startup

DYNAMIC CHARACTERISTICS

85\85

dB

120 Hz; Figs. 33-34

Output Voltage during Load Current Transient

For a Step Change in 1.225V Output Current (.1A/µs)

50

mV

50% to 75% to 50% Iout max; Figure 21

For a Step Change in 2.45V Output Current (.1A/µs)

50

mV

50% to 75% to 50% Iout max; Figure 22

Settling Time

400

µs

To within 1% Vout nom

Turn-On Transient

Turn-On Time

10

15

ms

Full load, Vout=90% nom.; Figures 19 & 20

Start-Up Inhibit Time

180

200

240

ms

-40°C to +125°C; Figure F

Output Voltage Overshoot

0

%

20mF load capacitance, Iout = 0A

EFFICIENCY

100% Load (20W)

85

%

48Vin, 50% load each Vout; Figures 1 - 6

50% Load (10W)

82.5

%

48Vin, 25% load each Vout; Figures 1 - 6

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 165°C

Transformer Temperature

125

°C

See Figures 11 - 18 for derating curves

ISOLATION CHARACTERISTICS

Isolation Voltage (dielectric strength)

2000

V

Isolation Resistance

30

M

Ω

3300

pF

DQ62412QKA02 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: Higher values of isolation capacitance can be added external to the module.