Product # PQ60120QGA08

Phone 1-888-567-9596

Doc.# 005-2QG612D Rev. A

1/23/03

Page 3

Technical Specification

48Vin 12Vout 8.3A

Quarter

Quarter

Brick

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)

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

3.5

A

100% Load, 35 Vin

No-Load Input Current

80

120

mA

Disabled Input Current

1.6

3

mA

Inrush Current Transient Rating

0.01

Response to Input Transient

500

mV

1000V/ms input transient; Figure 17

Input Reflected-Ripple Current

6

mA

P-P thru 10µH inductor; Figs. 13 & 15

Recommended Input Fuse

20

A

fast blow external fuse recommended

Input Filter Component Values (C\L)

2.46\4.7

µF\µH

internal values, see Figure E

Recommended External Input Capacitance

33

47

µF

see Figure 13

OUTPUT CHARACTERISTICS

Output Voltage Set Point

11.82

12.00

12.18

V

Output Voltage Regulation

Over Line

+0.05 \ 5 +0.2 \ 24

%\mV

Over Load

+0.05 \ 5 +0.2 \ 24

%\mV

Over Temperature

+90

+240

mV

Total Output Voltage Range

11.58

12.42

V

over sample, line, load, temperature & life

Output Voltage Ripple and Noise

20MHz bandwidth; Fig. 13 & 16

Peak-to-Peak

75

150

mV

Full Load, see Figures 13 & 16

RMS

15

30

mV

Full Load, see Figures 13 & 16

Operating Output Current Range

0

8.33

A

Output DC Current-Limit Inception

9

9.6

11

A

Output Voltage 10% Low

Output DC Current-Limit Shutdown Voltage

7.2

V

Back-Drive Current Limit while Enabled

0.1

0.3

0.8

A

Negative current drawn from output

Back-Drive Current Limit while Disabled

0

10

50

mA

Negative current drawn from output

Maximum Output Capacitance

2,000

µF

12Vout at 8.3A Resistive Load

DYNAMIC CHARACTERISTICS

Input Voltage Ripple Rejection

55

dB

120 Hz; Fig. 20

Output Voltage During Load Current Transient

Step Change in Output Current (0.1A/µs)

500

mV

50% to 75% to 50% Iout max; Figure 11

Step Change in Output Current (5A/µs)

500

mV

50% to 75% to 50% Iout max; Figure 12

Settling Time

800

µs

to within 1% Vout nom

Turn-On Transient

Turn-On Time

4

8

12

ms

Full load, Vout=90% nom.; Figs. 9 & 10

Start-Up Inhibit Time

180

200

215

ms

-40°C to +125°C; Figure F

Output Voltage Overshoot

0

%

10,000 µF load capacitance, Iout = 0A

EFFICIENCY

100% Load

88

%

Figures 1 - 4

50% Load

88

%

Figures 1 - 4

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 - 8 for derating curves

ISOLATION CHARACTERISTICS

Isolation Voltage

2000

V

Isolation Resistance

10

M

Ω

Isolation Capacitance

470

pF

PQ60120QGA08 ELECTRICAL CHARACTERISTICS

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