DS_E48SC12008_03192012

2

LUO LUOTECHNICAL SPECIFICATIONS

PARAMETER

NOTES and CONDITIONS

E48SC12008 (Standard)

Min.

Typ.

Max.

Units

ABSOLUTE MAXIMUM RATINGS

Input Voltage

Continuous

80

Vdc

Transient

100ms

100

Vdc

Operating Ambient Temperature

-40

85

°C

Storage Temperature

-55

125

°C

Input/Output Isolation Voltage

2250

Vdc

INPUT CHARACTERISTICS

Operating Input Voltage

36

75

Vdc

Input Under-Voltage Lockout

Turn-On Voltage Threshold

33

34

35

Vdc

Turn-Off Voltage Threshold

31

32

33

Vdc

Lockout Hysteresis Voltage

1

2

3

Vdc

Maximum Input Current

100% Load, 36Vin

3.5

A

No-Load Input Current

80

mA

Off Converter Input Current

10

mA

Inrush Current(I

1

A

Input Reflected-Ripple Current

P-P thru 12µH inductor, 5Hz to 20MHz

20

mA

Input Voltage Ripple Rejection

120 Hz

60

dB

OUTPUT CHARACTERISTICS

Output Voltage Set Point

Vin=48V, Io=Io.max, Tc=25°C

11.88

12.00

12.12

Vdc

Output Voltage Regulation

Over Load

Io=Io,min to Io,max

±3

±15

mV

Over Line

Vin= 36V to 75V

±3

±15

mV

Over Temperature

Tc= -40°C to 85°C

±100

mV

Total Output Voltage Range

Over sample load, line and temperature

11.76

12.25

V

Output Voltage Ripple and Noise

5Hz to 20MHz bandwidth

Peak-to-Peak

Full Load, 1µF ceramic, 10µF tantalum

40

120

mV

RMS

Full Load, 1µF ceramic, 10µF tantalum

15

25

mV

Operating Output Current Range

0

8

A

Output DC Current-Limit Inception

Output Voltage 10% Low

110

140

%

DYNAMIC CHARACTERISTICS

Output Voltage Current Transient

48V, 10µF Tan & 1µF Ceramic load cap, 0.1A/µs

Positive Step Change in Output Current

25% Io.max to 50% Io.max

200

mV

Negative Step Change in Output Current

50% Io.max to 25% Io.max

200

mV

Settling Time (within 1% Vout nominal)

200

µs

Turn-On Transient

Start-Up Time, From On/Off Control

40

80

ms

Start-Up Time, From Input

40

80

ms

Maximum Output Capacitance

Full load; 5% overshoot of Vout at startup

2000

µF

EFFICIENCY

100% Load

48Vin

92.0

%

60% Load

48Vin

90.5

%

ISOLATION CHARACTERISTICS

Input to Output

2250

Vdc

Isolation Resistance

10

MΩ

Isolation Capacitance

1000

pF

FEATURE CHARACTERISTICS

Switching Frequency

350

400

kHz

ON/OFF Control, Negative Remote On/Off logic

Logic Low (Module On)

Von/off at Ion/off=1.0mA

-0.7

0.8

V

Logic High (Module Off)

Von/off at Ion/off=0.0 µA

3.5

12

V

ON/OFF Control, Positive Remote On/Off logic

Logic Low (Module Off)

Von/off at Ion/off=1.0mA

-0.7

0.8

V

Logic High (Module On)

Von/off at Ion/off=0.0 µA

3.5

12

V

ON/OFF Current (for both remote on/off logic)

Ion/off at Von/off=0.0V

1

mA

Leakage Current (for both remote on/off logic)

Logic High, Von/off=12V

50

µA

Output Voltage Trim Range

Pout ≦ max rated power

-10%

10%

%

Output Voltage Remote Sense Range

Pout ≦ max rated power

10

%

Output Over-Voltage Protection

Over full temperature range

13.8

15.0

16.8

V

GENERAL SPECIFICATIONS

MTBF

Io=80% of Io, max; 300LFM @25C

2.2

M hours

Weight

Without heat-spreader

21.4

grams

Weight

With heat-spreader

33.5

grams

Over-Temperature Shutdown

( Without heat spreader, Hot spot 1)

Refer to Figure 19 for Hot spot 1 location

(48Vin,80% Io, 200LFM,Airflow from Vin+ to Vin-)

127

°C

Over-Temperature Shutdown

( Without heat spreader, NTC Resistor)

Refer to Figure 19 for NTC resistor location

123

°C

Over-Temperature Shutdown

(With heat spreader, Hot spot 2)

Refer to Figure 21 for Hot spot 2 location

(48Vin,80% Io, 200LFM,Airflow from Vin+ to Vin-)

118

°C

N

ote: Please attach thermocouple on NTC resistor to test OTP function, the hot spots’ temperature is just for reference.