DS_Q48SQ12018_08092013

2

TECHNICAL SPECIFICATIONS

PARAMETER

NOTES and CONDITIONS

Q48SQ12018 (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

1500

Vdc

INPUT CHARACTERISTICS

Operating Input Voltage

36

48

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

2

Vdc

Maximum Input Current

9

A

No-Load Input Current

Vin=48V, Io=0A

100

mA

Off Converter Input Current

Vin=48V, Io=0A

9

13

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

-30

dB

OUTPUT CHARACTERISTICS

Output Voltage Set Point

Vin=48V, Io=0, Tc=25°C

11.88

12.00

12.12

Vdc

Output Voltage Regulation

Over Load

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

±10

±30

mV

Over Line

Vin=36V to 75V, Io=Io min

±10

±30

mV

Over Temperature

Vin=48V, Tc=-40°C to 85°C

±60

mV

Total Output Voltage Range

over sample load, line and temperature

11.64

12.36

Vdc

Output Voltage Ripple and Noise

5Hz to 20MHz bandwidth

Peak-to-Peak

Full Load, 1µF ceramic, 10µF tantalum

100

150

mV

RMS

Full Load, 1µF ceramic, 10µF tantalum

25

50

mV

Operating Output Current Range

0

18

A

Output DC Current-Limit Inception

Output Voltage 10% Low

21

23

25

A

DYNAMIC CHARACTERISTICS

Output Voltage Current Transient

48V, 100uF Al Ecap,10µF Tan & 1µF Ceramic load

cap, 0.1A/µs

Positive Step Change in Output Current

50% Io.max to 75% Io.max

200

mV

Negative Step Change in Output Current

75% Io.max to 50% Io.max

200

mV

Settling Time (within 1% Vout nominal)

300

us

Turn-On Transient

Start-Up Time, From On/Off Control

100

ms

Start-Up Time, From Input

100

ms

Maximum Output Capacitance

Low ESR CAP (OSCON), 100% load;

0

5500

µF

EFFICIENCY

100% Load

Vin=48V

94.7

%

60% Load

Vin=48V

94.9

%

ISOLATION CHARACTERISTICS

Input to Output

1500

Vdc

Isolation Resistance

10

MΩ

Isolation Capacitance

6800

pF

FEATURE CHARACTERISTICS

Switching Frequency

130

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

125

140

%

Output voltage trim range

Pout≤Max rated power

-20

10

%

GENERAL SPECIFICATIONS

MTBF(with heat spreader)

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

2

M hours

Weight(without heat spreader)

50.0

grams

Weight(with heat spreader)

65.5

grams

Over-Temperature Shutdown (without heat spreader)

Refer to Figure 21 for Hot spot location

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

130

°C

Over-Temperature Shutdown (with heat spreader)

Refer to Figure 23 for Hot spot location

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

123

°C

Over-Temperature Shutdown (NTC Resistor)

Refer to Figure 21 NTC resistor location

125

°C

Note: Pleas

e attach thermocouple on NTC resistor to test OTP function, the hot spot’s temperature is just for reference.