DS_E36SC3R335_03282013

2

TECHNICAL SPECIFICATIONS

Note1: For applications with higher output capacitive load, please contact Delta

Note2: Trim down range -10% for 18Vin ~75Vin, Trim up range +10% for 20Vin ~ 75Vin.

PARAMETER

NOTES and CONDITIONS

E36SC3R335(Standard)

Min.

Typ.

Max.

Units

ABSOLUTE MAXIMUM RATINGS

Input Voltage

Vdc

Continuous

0

80

Vdc

Transient (100ms)

100ms

100

Vdc

Operating Ambient Temperature

-40

85

°C

Storage Temperature

-55

125

°C

Input/Output Isolation Voltage

1500

Vdc

INPUT CHARACTERISTICS

Operating Input Voltage

18

48

75

Vdc

Input Under-Voltage Lockout

Turn-On Voltage Threshold

16.5

17.2

17.9

Vdc

Turn-Off Voltage Threshold

15.5

16.2

17.9

Vdc

Lockout Hysteresis Voltage

0.3

1.0

1.8

Vdc

Maximum Input Current

100% Load, 18Vin

8.2

A

No-Load Input Current

Vin=48V, Io=0A

65

mA

Off Converter Input Current

Vin=48V

5.5

mA

Inrush Current (I2t)

1

A2s

Input Reflected-Ripple Current

P-P thru 12µH inductor, 5Hz to 20MHz

20

mA

Input Voltage Ripple Rejection

120 Hz

50

dB

OUTPUT CHARACTERISTICS

Output Voltage Set Point

Vin=48V, Io=Io.max, Tc=25°C

3.25

3.3

3.35

Vdc

Output Voltage Regulation

Over Load

Io=Io, min to Io, max

±5

±10

mV

Over Line

Vin=18V to 75V

±5

±10

mV

Over Temperature

Tc=-40°C to 85°C

±50

mV

Total Output Voltage Range

Over sample load, line and temperature

3.2

3.3

3.4

V

Output Voltage Ripple and Noise

5Hz to 20MHz bandwidth

Peak-to-Peak

Vin=48V, Full Load, 1µF ceramic, 10µF tantalum

70

mV

RMS

Vin=48V, Full Load, 1µF ceramic, 10µF tantalum

mV

Operating Output Current Range

Vin=18V to75V

0

35

A

Operating Output Current Range

Output Over Current Protection(hiccup mode)

Output Voltage 10% Low

110

140

%

DYNAMIC CHARACTERISTICS

Output Voltage Current Transient

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

Positive Step Change in Output Current

75% Io.max to 50% Io.max

100

mV

Negative Step Change in Output Current

50% Io.max to 75% Io.max

100

mV

Settling Time (within 1% Vout nominal)

µs

Turn-On Transient

Start-Up Time, From On/Off Control

60

mS

Start-Up Time, From Input

60

mS

Output Capacitance (note1)

Full load; 5% overshoot of Vout at startup

0

10000

µF

EFFICIENCY

100% Load

Vin=24V

91.5

%

100% Load

Vin=48V

91

%

60% Load

Vin=48V

91

%

ISOLATION CHARACTERISTICS

Input to Output

1500

Vdc

Isolation Resistance

10

MΩ

Isolation Capacitance

1000

pF

FEATURE CHARACTERISTICS

Switching Frequency

350

KHz

ON/OFF Control, Negative Remote On/Off logic

Logic Low (Module On)

Von/off

0.8

V

Logic High (Module Off)

Von/off

3.0

5

V

ON/OFF Control, Positive Remote On/Off logic

Logic Low (Module Off)

Von/off

0.8

V

Logic High (Module On)

Von/off

3.0

5

V

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

Ion/off at Von/off=0.0V

mA

Leakage Current (for both remote on/off logic)

Logic High, Von/off=5V

Output Voltage Trim Range(note 2)

Pout ≦ max rated power,Io ≦ Io.max

-10

10

%

Output Voltage Remote Sense Range

Pout ≦ max rated power,Io ≦ Io.max

10

%

Output Over-Voltage Protection

Over full temp range; % of nominal Vout

115

140

%

GENERAL SPECIFICATIONS

MTBF

Io=80% of Io, max; Ta=25°C, airflow rate=300FLM

3.67

M hours

Weight

Without heat spreader

24.6

grams

Weight

With heat spreader

33.2

grams

Over-Temperature Shutdown ( Without heat spreader)

Refer to Figure 19 for Hot spot 1 location

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

129

°C

Over-Temperature Shutdown

(With heat spreader)

Refer to Figure 22 for Hot spot 2 location

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

120

°C

Over-Temperature Shutdown ( NTC resistor )

Refer to Figure 19 for NTC resistor location

125

°C

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