Product # DQ63315QGL07

Phone 1-888-567-9596

Doc.# 005-2DQ315D Rev. B

10/7/03

Page 3

Technical Specification

48Vin 3.3/1.5Vout 72W

Quarter

Quarter

Brick Dual

Brick Dual

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)

2000

V

Basic 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

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 Hysteresis Voltage

2.5

3.5

4.5

V

Maximum Input Current

2.85

A

100% Load, 35 Vin

No-Load Input Current

60

80

mA

Disabled Input Current

2

3

mA

Inrush Current Transient Rating

0.03

Response to Input Transient

5

mV

1000V/ms input transient

Input Reflected-Ripple Current

3

mA

RMS thru 10µH inductor; Figs. 17 & 19

Recommended Input Fuse

20

A

fast blow external fuse recommended

Input Filter Component Values (L\C)

4.7\1x2

µH\µF

internal values, see Figure E

Recommended External Input Capacitance

33

47

µF

see Figure 17

OUTPUT CHARACTERISTICS

Output Voltage Set Point (1.5V)

1.46

1.50

1.54

V

48Vin, 50% load on each voltage

Output Voltage Set Point (3.3V)

3.26

3.30

3.34

V

48Vin, 50% load on each voltage

Output Voltage Regulation (1.5V)

Over Line

+0.05 \ 2 +0.15 \ 5

%\mV

Over Load

+1.0 \ 15 +2.0 \ 30

%\mV

Over Temperature

+25

+40

mV

Total Output Voltage Regulation (3.3V)

Over Line

+0.05 \ 2 +0.15 \ 5

%\mV

Over Load

+0.5 \ 17 +1.0 \ 33

%\mV

Over Temperature

+50

+70

mV

Total Output Voltage Range (1.5V)

1.42

1.58

V

over sample, line, load, temperature & life

Total Output Voltage Range (3.3V)

3.19

3.41

V

over sample, line, load, temperature & life

Output Voltage Ripple and Noise (1.5V & 3.3V)

20MHz bandwidth; Fig. 17 & 20

Peak-to-Peak

50

100

mV

Full Load, see Figures 17 & 20

RMS

10

20

mV

Full Load, see Figures 17 & 20

Operating Output Current Range (1.5V)

0

15

A

Operating Output Current Range (3.3V)

0

15

A

Output DC Current-Limit Inception (1.5V)

15.2

17

19.4

A

Output Voltage 10% Low; Figs. 21-22

Output DC Current-Limit Inception (3.3V)

15.2

17

19.4

A

Output Voltage 10% Low; Figs. 21-22

Short-Circuit Protection - redundant shutdown (1.5V)

17

A

Figures 23-24

Short-Circuit Protection - redundant shutdown (3.3V)

17

A

Figures 23-24

Output DC Current-Limit Shutdown Voltage (1.5V)

0.5

V

Output DC Current-Limit Shutdown Voltage (3.3V)

1.0

V

Back-Drive Current Limit while Enabled

1.0

A

Negative current drawn from output

Back-Drive Current Limit while Disabled

10

mA

Negative current drawn from output

Maximum Output Capacitance (1.5V)

10

mF

1.5V at 15A resistive load

Maximum Output Capacitance (3.3V)

10

mF

3.3V at 15A resistive load

DYNAMIC CHARACTERISTICS

Input Voltage Ripple Rejection (1.5V \ 3.3V)

80\80

dB

120 Hz; Figs. 27-28

Output Voltage during Load Current Transient

100

mV

50% to 75% to 50% Iout max; Figure 15

100

mV

50% to 75% to 50% Iout max; Figure 16

Settling Time

300

µs

to within 1% Vout nom

Turn-On Transient

Turn-On Time

6

12

ms

Full load, Vout=90% nom.; Figs. 13 & 14

Start-Up Inhibit Time

180

200

215

ms

-40°C to +125°C; Figure F

Output Voltage Overshoot

0

%

10mF load capacitance, Iout = 0A

EFFICIENCY

100% Load

87

%

48Vin, 100% load each Vout; Figs 1 - 6

50% Load

87

%

48Vin, 50% load each Vout; Figs 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 130°C

Transformer Temperature

125

°C

See Figures 7 - 12 for derating curves

DQ63315QGL07 ELECTRICAL CHARACTERISTICS

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