DS_Q48SK12448NNFB_10222015

E-mail: dcdc@deltaww.com

http://www.deltaww.com/dcdc

P2

TECHNICAL SPECIFICATIONS

PARAMETER

NOTES and CONDITIONS

Q48SK12448NNFB

Min.

Typ.

Max.

Units

ABSOLUTE MAXIMUM RATINGS

Input Voltage

Continuous

60

Vdc

Operating Ambient temperature

-40

85

°C

Storage Temperature

-55

125

°C

Input/Output Isolation Voltage

1500

Vdc

Min time interval between trun off to next

turn on

20

ms

INPUT CHARACTERISTICS

Operating Input Voltage

46

54

60

Vdc

Input Under-Voltage Lockout

Turn-On Voltage Threshold

42

44

46

Vdc

Turn-Off Voltage Threshold

40

42

44

Vdc

Lockout Hysteresis Voltage

2

Vdc

Maximum Input Current

50A Load, 46Vin

15

A

Maximum Input Current

800 watts Load for 4ms, 46Vin

19.5

A

No-Load Input Current

Vin=54V, Io=0A

80

160

210

mA

Off Converter Input Current

Vin=54V, Io=0A

7

15

20

mA

Inrush Current (I

1

A

Input Reflected-Ripple Current

P-P thru 12µH inductor, 5Hz to 20MHz

250

mA

OUTPUT CHARACTERISTICS

Output Voltage Set Point

Vin=54V, Io=0, Tc=25°C

11.9

12

12.1

Vdc

Output Voltage Regulation

Over Load

Vin=54V, Io=Io min to Io max

30

mV

Over Line

Vin=46V to 60V, Io=Io min

20

mV

Over Temperature

Vin=54V, Tc= min to max case temperatrue

130

mV

Total Output Voltage Range

over sample load, line and temperature

11.4

12.6

Vdc

Output Voltage Ripple and Noise

20MHz bandwidth

Peak-to-Peak

Full Load, 1µF ceramic,10µF tantalum,450uF Oscon

250

350

mV

RMS

Full Load, 1µF ceramic,10µF tantalum,450uF Oscon

20

60

mV

Operating Output Current Range

0

50

A

Operating Output Current Range

800 watts Load for 4ms

0

67

A

Output DC Current-Limit Inception

Output Voltage 10% Low

73

80

87

A

Start afford load time, From On/Off Control

2

s

DYNAMIC CHARACTERISTICS

Output Voltage Current Transient

, 1µF ceramic,10µF tantalum,450uF Oscon

0.1A/µs

Positive Step Change in Output Current

50% to 75% of full load

200

350

mV

Negative Step Change in Output Current

75% to 50% of full load

200

350

mV

Settling Time (within 1% Vout nominal)

450

µs

Turn-On Transient

Vin slew rate: 10V/mS

Start-Up Time, From On/Off Control

60

90

120

ms

Start-Up Time, From Input

60

90

120

ms

Maximum Output Capacitance

Low ESR CAP (OSCON), 100% load;

8900

µF

EFFICIENCY

100% Load

Vin=54V

96.2

96.7

%

60% Load

Vin=54V

96.0

96.5

%

ISOLATION CHARACTERISTICS

Input to Output

1500

Vdc

Isolation Resistance

10

MΩ

Isolation Capacitance

1000

pF

FEATURE CHARACTERISTICS

Switching Frequency

180

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 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

14

16

Vdc

GENERAL SPECIFICATIONS

MTBF

Io=80% of Io, max; Ta=25°C

2.1

M hours

Weight(with heat spreader)

74.5

grams

Over-Temperature Shutdown (Hot Spot)

Refer to Figure18 for Hot spot location

(54Vin,80%Io, 200LFM,Airflow from Vin+ to Vin-)

125

°C

Over-Temperature Shutdown (NTC Resistor)

130

°C

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