Delta Electronics 240W User Manual

Delphi Series E48SB, 240W Eighth Brick Bus Converter

FEATURES

 Input voltage range: 38V~55V

 Output 240W @ 44Vin and above

 Output 22.3A @ 44Vin and below

 High efficiency: 96.3% @ 12V/20A

 Size: 58.4mm x 22.8mm x 11.4mm

(2.28” x 0.90” x 0.45”)

 Industry standard pinout

 Fully protected: Input UVLO, OVP, Output

OCP and OTP

 Parallelable for higher output power

 2250V isolation

 Basic insulation

 Monotonic startup

 No minimum load required

 ISO 9001, TL 9000, ISO 14001, QS9000,

OHSAS18001 certified manufacturing facility

 UL/cUL 60950 (US & Canada) Recognized,

and TUV (EN60950) Certified

 CE mark meets 73/23/EEC and 93/68/EEC

directives

DC/DC Power Modules: 48Vin, 12V/20A out

Delta Electronics, Inc., a world leader in power systems technology and manufacturing, has introduced the E48SB, eighth brick sized 240W bus converter, into their Delphi Series of board mounted DC/DC power converters to support the intermediate bus architecture to power multiple downstream non-isolated point-of-load (POL) converters. The E48SB product family features an input voltage of 38V to 55V, and provides up to 240W (9.6V and above) of power in an industry standard eighth brick footprint. Typical efficiency of 12V module is 96.3%. With optimized component placement, creative design topology, and numerous patented technologies, the E48SB bus converters deliver outstanding electrical and thermal performance. An optional heatsink is available for harsh thermal requirements.

OPTIONS

 Positive On/Off logic  Short pin lengths

 Heatsink available for extended

operation

 OTP and OCP mode (Auto restart or

latch)

APPLICATIONS

 Datacom / Netowrking

 Wireless Networks

 Optical Network Equipment  Server and Data Storage

 Industrial / Testing Equipment

DATASHEET DS_E48SB12020_05222008

TECHNICAL SPECIFICATIONS

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

PARAMETER NOTES and CONDITIONS E48SB12020 (Standard)

ABSOLUTE MAXIMUM RATINGS

Input Voltage

Continuous 60 Vdc Operating Temperature Refer to Figure 18 for the measuring point -40 128 °C Storage Temperature -55 125 °C Input/Output Isolation Voltage 2250 Vdc

INPUT CHARACTERISTICS

Operating Input Voltage 38 48 55 Vdc Input Under-Voltage Lockout

Turn-On Voltage Threshold 35 36 37 Vdc

Turn-Off Voltage Threshold 33 34 35 Vdc

Lockout Hysteresis Voltage 1 2 3 Vdc

Input Over-Voltage Lockout

Turn-Off Voltage Threshold 57.5 58.5 59.7 Vdc

Turn-On Voltage Threshold 55.5 56.5 57.5 Vdc

Lockout Hysteresis Voltage 1 2 3 Vdc

Maximum Input Current 100% Load, 44V Vin 5.68 A No-Load Input Current 85 100 mA Off Converter Input Current 10 11 mA Inrush Current (I2t) 0.02 A2s Input Reflected-Ripple Current P-P thru 12µH inductor, 5Hz to 20MHz 10 20 mA

OUTPUT CHARACTERISTICS

Output Voltage Set Point Vin=48V, Io=no load, Ta=25°C 11.85 Vdc Output Voltage Regulation

Over Load Io=Io,min to Io,max 300 400 mV

Over Line Vin=38V to 55V 4.3 4.5 V

Over Temperature Tc=-40°C to 105°C 250 mV

Total Output Voltage Range over sample load, line and temperature 8.9 13.75 V Output Voltage Ripple and Noise 5Hz to 20MHz bandwidth

Peak-to-Peak Full Load, 1µF ceramic, 10µF tantalum 80 100 mV

RMS Full Load, 1µF ceramic, 10µF tantalum 25 40 mV

Operating Output Power Range

Output Current Protection Vin=38V to 55V 110 130 % Current share accuracy (2 units in parallel) % of rated output current 10 %

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 0 mV

Negative Step Change in Output Current 75% Io.max to 50% Io.max 0 mV

Settling Time (Vo deviation recover to 10% of max

deviation)

Turn-On Transient

Start-Up Time, From On/Off Control 100% Load 10 16 ms

Start-Up Time, From Input 100% Load 16 28 ms

Maximum Output Capacitance 3000 µF

EFFICIENCY

100% Load 96.3 % 60% Load 95.8 %

ISOLATION CHARACTERISTICS

Input to Output 2250 Vdc Isolation Resistance 10 MΩ Isolation Capacitance 1000 pF

FEATURE CHARACTERISTICS

Switching Frequency 190 kHz ON/OFF Control, Negative Remote On/Off logic

Logic Low (Module On) Von/off -0.7 0.8 V

Logic High (Module Off) Von/off 2 18 V

ON/OFF Control, Positive Remote On/Off logic

Logic Low (Module Off) Von/off -0.7 0.8 V

Logic High (Module On) Von/off 2 18 V

ON/OFF Current (for both remote on/off logic) Ion/off at Von/off=0.0V 0.25 0.3 mA

Leakage Current (for both remote on/off logic) Logic High, Von/off=15V 30 uA

GENERAL SPECIFICATIONS

MTBF Io=80% of Io, max; 2.01 M hours Weight 31.76 grams Over-Temperature Shutdown Refer to Figure 18 for the measuring point 130 °C

Min. Typ. Max. Units

Output current range when Vin below 44V 0 22.3 A

Output power range when Vin=44V and above 0 240 W

0 us

DS_E48SB12020_05222008

ELECTRICAL CHARACTERISTICS CURVES

Efficiency (%)

3 6 9 1215182124

Output Current (A)

38Vin 48Vin 55Vin

Figure 1: Efficiency vs. load current for minimum, nominal, and

maximum input voltage at 25°C

Loss (W)

38Vin

0 3 6 9 12 15 18 21 24

Output Current (A)

48Vin 55Vin

Figure 2: Power loss vs. load current for minimum, nominal,

and maximum input voltage at 25°C.

23.00

22.00

Output Voltage (V)

0 3 6 9 12 15 18 21 24 27

38Vin 48Vin 55Vin

Output Current (A)

Figure 3: Output voltage regulation vs load current showing typical current limit curves and converter shutdown points for

minimum, nominal, and maximum input voltage at room

temperature.

21.00

20.00

Max Io (A)

19.00

18.00

17.00

38 40 42 44 46 48 50 52 54 56

Vin (V)

Figure 4: Max output current vs input voltage.

DS_E48SB12020_05222008

ELECTRICAL CHARACTERISTICS CURVES

For Negative Remote On/Off Logic

Figure 5: Turn-on transient at full rated load current (5 ms/div). Top Trace: Vout; 5V/div; Bottom Trace: ON/OFF input: 2V/div

For Positive Remote On/Off Logic

Figure 6: Turn-on transient at zero load current (5 ms/div). Top

Trace: Vout: 5V/div; Bottom Trace: ON/OFF input: 2V/div

Figure 7: Turn-on transient at full rated load current (5 ms/div). Top Trace: Vout; 5V/div; Bottom Trace: ON/OFF input: 2V/div

DS_E48SB12020_05222008

Figure 8: Turn-on transient at zero load current (5 ms/div). Top

Trace: Vout: 5V/div; Bottom Trace: ON/OFF input: 2V/div

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