DS_Q48SE12018_06242013

2

TECHNICAL SPECIFICATIONS

PARAMETER

NOTES and CONDITIONS

Q48SE12018 (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

38

48

75

Vdc

Input Under-Voltage Lockout

Turn-On Voltage Threshold

32.0

34.0

36.0

Vdc

Turn-Off Voltage Threshold

30.0

32.0

34.0

Vdc

Lockout Hysteresis Voltage

2

Vdc

Maximum Input Current

100% Load, 38Vin

9

A

No-Load Input Current

Vin=48V, Io=0A

150

mA

Off Converter Input Current

Vin=48V, Io=0A

10

mA

Inrush Current (I

1

A

Input Reflected-Ripple Current

P-P thru 12µH inductor, 5Hz to 20MHz

10

mA

Input Voltage Ripple Rejection

120 Hz

-30

dB

OUTPUT CHARACTERISTICS

Output Voltage Set Point

Vin=48V, Io=0, Tc=25°C

11.67

11.8

11.92

Vdc

Output Voltage Regulation

Over Load

Vin=48V, Io=Io,min to Io,max

±30

±80

mV

Over Line

Vin=38V to 75V, Io=Io min

±50

mV

Over Temperature

Vin=48V , Tc=-40°C to 85°C

±100

mV

Total Output Voltage Range

over sample load, line and temperature

11.44

12.16

Vdc

Output Voltage Ripple and Noise

5Hz to 20MHz bandwidth

Peak-to-Peak

Full Load, 1µF ceramic, 10µF tantalum

120

mV

RMS

Full Load, 1µF ceramic, 10µF tantalum

50

mV

Operating Output Current Range

0

18

A

Output DC Current-Limit Inception

Output Voltage 10% Low

110

140

%

DYNAMIC CHARACTERISTICS

Output Voltage Current Transient

48V, 10µF Tan & 100µF Ceramic load cap, 0.1A/µs

Positive Step Change in Output Current

50% Io.max to 75% Io.max

300

mV

Negative Step Change in Output Current

75% Io.max to 50% Io.max

300

mV

Settling Time (within 1% Vout nominal)

300

µs

Turn-On Transient

Start-Up Time, From On/Off Control

70

ms

Start-Up Time, From Input

80

ms

Maximum Output Capacitance

Low ESR CAP (OSCON), 100% Load;

6000

µF

EFFICIENCY

100% Load

Vin=48V

94.7

%

60% Load

Vin=48V

94.5

%

ISOLATION CHARACTERISTICS

Input to Output

2250

Vdc

Isolation Resistance

10

MΩ

Isolation Capacitance

1000

pF

FEATURE CHARACTERISTICS

Switching Frequency

160

kHz

ON/OFF Control, Negative Remote On/Off logic

Logic Low (Module On)

Von/off at Ion/off=1.0mA

0

0.8

V

Logic High (Module Off)

Von/off at Ion/off=0.0 µA

2

50

V

ON/OFF Control, Positive Remote On/Off logic

Logic Low (Module Off)

Von/off at Ion/off=1.0mA

0

0.8

V

Logic High (Module On)

Von/off at Ion/off=0.0 µA

2

50

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=15V

50

uA

Output Over-Voltage Protection

Over full temp range; % of nominal Vout

115

140

%

GENERAL SPECIFICATIONS

MTBF(without heat spreader)

Io=80% of Io, max; Tc=25°C;Airflow=300LFM

3.49

M hours

Weight(without heat spreader)

50.5

grams

Weight(with heat spreader)

65.5

grams

Over-Temperature Shutdown

( Without heat spreader)

Refer to Figure 18 for Hot spot 1 location

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

127

°C

Over-Temperature Shutdown

(With heat spreader)

Refer to Figure 20 for Hot spot 2 location

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

121

°C

Over-Temperature Shutdown

( NTC resistor )

Refer to Figure 18 for NTC resistor location

125

°C

Note: Please attach thermocouple on NTC resisto

r to test OTP function, the hot spots’ temperature is just for reference.