E48SC datasheet(2/15 Pages) DELTA

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DS_E48SC3R325_06152011

TECHNICAL SPECIFICATIONS

(TA=25°C, airflow rate=300 LFM, Vin=48Vdc, nominal Vout unless otherwise noted.)

PARAMETER

NOTES and CONDITIONS

E48SC3R325 (Standard)

Min.

Typ.

Max.

Units

ABSOLUTE MAXIMUM RATINGS

Input Voltage

Continuous

Vdc

Transient (100ms)

100ms

100

Vdc

Operating Temperature

Refer to Figure 21 for measuring point

-40

115

°C

Storage Temperature

-55

125

°C

Input/Output Isolation Voltage

1500

Vdc

INPUT CHARACTERISTICS

Operating Input Voltage

Vdc

Input Under-Voltage Lockout

Turn-On Voltage Threshold

Vdc

Turn-Off Voltage Threshold

Vdc

Lockout Hysteresis Voltage

1.5

2.5

3.5

Vdc

Maximum Input Current

100% Load, 36Vin

2.9

No-Load Input Current

Off Converter Input Current

Inrush Current(I

2t)

Input Reflected-Ripple Current

P-P thru 12µH inductor, 5Hz to 20MHz

Input Voltage Ripple Rejection

120 Hz

OUTPUT CHARACTERISTICS

Output Voltage Set Point

Vin=48V, Io=Io.max, Tc=25°C

3.267

3.300

3.333

Vdc

Output Voltage Regulation

Over Load

Io=Io,min to Io,max

±3

±7

Over Line

Vin=36V to 75V

±3

±7

Over Temperature

Tc=-40°C to 85°C

±15

Total Output Voltage Range

over sample load, line and temperature

3.234

3366

Output Voltage Ripple and Noise

5Hz to 20MHz bandwidth

Peak-to-Peak

Full Load, 1µF ceramic, 10µF tantalum

RMS

Full Load, 1µF ceramic, 10µF tantalum

Operating Output Current Range

Output DC Current-Limit Inception

Output Voltage 10% Low

112

136

DYNAMIC CHARACTERISTICS

Output Voltage Current Transient

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

Positive Step Change in Output Current

50% Io.max to 75% Io.max

120

Negative Step Change in Output Current

75% Io.max to 50% Io.max

120

Settling Time (within 1% Vout nominal)

200

Turn-On Transient

Start-Up Time, From On/Off Control

Start-Up Time, From Input

Maximum Output Capacitance

Full load; 5% overshoot of Vout at startup

20000

µF

EFFICIENCY

100% Load

91.0

60% Load

92.0

ISOLATION CHARACTERISTICS

Input to Output

1500

Vdc

Isolation Resistance

MΩ

Isolation Capacitance

3300

FEATURE CHARACTERISTICS

Switching Frequency

350

kHz

ON/OFF Control, Negative Remote On/Off logic

Logic Low (Module On)

Von/off at Ion/off=1.0mA

0.7

Logic High (Module Off)

Von/off at Ion/off=0.0 µA

ON/OFF Control, Positive Remote On/Off logic

Logic Low (Module Off)

Von/off at Ion/off=1.0mA

0.7

Logic High (Module On)

Von/off at Ion/off=0.0 µA

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

Ion/off at Von/off=0.0V

Leakage Current (for both remote on/off logic)

Logic High, Von/off=15V

Output Voltage Trim Range

Across Pins 9 & 5, Pout ≦ max rated power

-10%

10%

Output Voltage Remote Sense Range

Pout ≦ max rated power

Output Over-Voltage Protection

Over full temp range; % of nominal Vout

3.8

4.46

GENERAL SPECIFICATIONS

MTBF

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

3.6

M hours

Weight

grams

Over-Temperature Shutdown

Refer to Figure 21 for measuring point

120

°C

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