Delta Series 240W User Manual
FEATURES
High efficiency: 96.5% @ 9.6V/25A
Size: 58.4mm x 22.8mm x 11.4mm
(2.30” x 0.90” x 0.45”)
Industry standard pinout
Fully protected: Input UVLO, OVP, Output
OCP and OTP
240W constant power output
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
Delphi Series E48SB, 240W Eighth Brick Bus Converter
DC/DC Power Modules: 48Vin, 9.6V/25A 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 9.6V module is 96.5%. 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 re-restart or
latch)
APPLICATIONS
Datacom / Netowrking
Wireless Networks
Optical Network Equipment
Server and Data Storage
Industrial/Testing Equipment
DATASHEET
DS_E48SB9R625_05222008
TECHNICAL SPECIFICATIONS
(TA=25°C, airflow rate=300 LFM, Vin=48Vdc, nominal Vout unless otherwise noted.)
PARAMETER NOTES and CONDITIONS E48SB9R625 (Standard)
ABSOLUTE MAXIMUM RATINGS
Input Voltage
Continuous 60 Vdc
Operating Temperature Refer to Figure 17 for the measuring point, Tc -40 117 °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 36.5 38 Vdc
Turn-Off Voltage Threshold 33 34.5 36 Vdc
Lockout Hysteresis Voltage 1 2 3 Vdc
Input Over-Voltage Lockout
Turn-Off Voltage Threshold 58 60 62 Vdc
Turn-On Voltage Threshold 57 58.5 60 Vdc
Lockout Hysteresis Voltage 1 1.5 2.5 Vdc
Maximum Input Current 38V Vin , 100% Load 6.65 A
No-Load Input Current 80 120 mA
Off Converter Input Current 7 15 mA
Inrush Current (I2t) 0.03 A2s
Input Reflected-Ripple Current P-P thru 12µH inductor, 5Hz to 20MHz 15 25 mA
OUTPUT CHARACTERISTICS
Output Voltage Set Point Vin=48V, Io=no load, Ta=25°C 9.5 Vdc
Output Voltage Regulation
Over Load Io=Io,min to Io,max 300 400 mV
Over Line Vin=38V to 55V 3.4 3.6 V
Over Temperature Tc=-40°C to 100°C 200 mV
Total Output Voltage Range Over sample load, line and temperature 7.0 11 V
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 40 mV
Operating Output Power Range Full input voltage range 0 240 W
Output DC Powert-Limit Inception Full input voltage range 110% 140% W
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 80 150 mV
Negative Step Change in Output Current 75% Io.max to 50% Io.max 80 150 mV
Settling Time (within 1% Vout nominal) 90 120 us
Turn-On Transient
Start-Up Time, From On/Off Control 8 15 25 ms
Start-Up Time, From Input 15 20 30 ms
Maximum Output Capacitance 3000 µF
EFFICIENCY
100% Load Vin=48V 96.5 %
60% Load Vin=48V 96.0 %
ISOLATION CHARACTERISTICS
Input to Output 2250 Vdc
Isolation Resistance 10 MΩ
Isolation Capacitance 1000 pF
FEATURE CHARACTERISTICS
Switching Frequency 130 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; Ta=25°C 1.86 M hours
Weight 31.76 grams
Over-Temperature Shutdown Refer to Figure 17 for the measuring point, Tc 122 °C
Min. Typ. Max. Units
DS_E48SB9R625_05222008
2
ELECTRICAL CHARACTERISTICS CURVES
Figure 1: Efficiency vs. load current for minimum, nominal, and
maximum input voltage at 25°C
12
11
10
9
8
7
6
5
4
Output Voltage(V)
3
2
1
0
0 3 6 9 12 15 18 21 24 27 30 33 36 39 42 45
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 .
38Vin
48Vin
55Vin
Output Current(A)
Figure 2: Power loss vs. load current for minimum, nominal,
and maximum input voltage at 25°C.
DS_E48SB9R625_05222008
3
ELECTRICAL CHARACTERISTICS CURVES
For Negative Remote On/Off Turn on Waveform
0
0
Figure 4: Turn-on transient at full rated load current
(5 ms/div). Top Trace: Vout; 5V/div; Bottom Trace: ON/OFF
input: 2V/div
For Vin Input Turn on Waveform
0
0
0
Figure 5: Turn-on transient at zero load current (5 ms/div). Top
Trace: Vout: 5V/div; Bottom Trace: ON/OFF input: 2V/div
0
0
Figure 6: Turn-on transient at full rated load current
(5 ms/div). Top Trace: Vout; 5V/div; Bottom Trace: Vin;
50V/div.
DS_E48SB9R625_05222008
0
Figure 7: Turn-on transient at zero load current (5 ms/div). Top
Trace: Vout: 5V/div; Bottom Trace: Vin; 50V/div.
4
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