Delta Electronics V48SR User Manual

Delphi Series V48SR, 1/16th Brick 66W

DC/DC Power Modules: 48V in, 15V, 4.4A out

The Delphi Series V48SR, 1/16th Brick, 48V input, single output, isolated

DC/DC converter, is the latest offering from a world leader in powe

systems technology and manufacturing ― Delta Electronics, Inc. This

product family provides up to 66 watts of power or 25A of output curren

(1.8V and below) in an industry standard 1/16thbrick form factor (1.30”

0.90”). The 15V output offers one of the highest output currents available

and provides up to 90.5% efficiency at full load. With creative design

technology and optimization of component placement, these converters

possess outstanding electrical and thermal performance, as well as

extremely high reliability under highly stressful operating conditions. All

modules are protected from abnormal input/output voltage, current, and

temperature conditions. For lower power needs with the 15V output, bu

in a similar small form factor, please check out Delta S48SP (36W o

15V/2.3A) and S48SE (17W or 15V/1A) series standard DC/DC modules.

FEATURES

 High efficiency: 90.5% @ 15V/4.4A

 Size: 33.0 x 22.9 x 9.5 mm

(1.30”x0.90”x0.37”)

 Industry standard footprint and pinout

 Fixed frequency operation

 SMD and through-hole versions

 Input UVLO and OVP

 OTP and output OCP, OVP

 Output voltage trim: -15%, +10%

 Monotonic startup into normal and

pre-biased loads

 2250V isolation and basic insulation

 No minimum load required

 No negative current during power or

enable on/off

 ISO 9001, TL 9000, ISO 14001, QS 9000,

OHSAS18001 certified manufacturing

facility

 UL/cUL 60950 (US & Canada)

recognized, and TUV (EN60950) certified

 CE mark meets 73/23/EEC and

93/68/EEC directive

OPTIONS

 SMD pins

 Positive remote On/Off

 OTP and output OVP, OCP mode

(auto-restart or latch)

APPLICATIONS

 Optical Transport

 Data Networking

 Communications

 Servers

DATASHEET DS_V48SR15004_06122007

TECHNICAL SPECIFICATIONS

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

PARAMETER NOTES and CONDITIONS V48SR15004 (Standard)

ABSOLUTE MAXIMUM RATINGS

Input Voltage

Continuous 80 Vdc

Transient (100ms) 100ms 100 Vdc Operating Temperature Refer to figure 21 for measuring point -40 121 °C Storage Temperature -55 125 °C

Input/Output Isolation Voltage 2250 Vdc

INPUT CHARACTERISTICS

Operating Input Voltage 36 75 Vdc Input Under-Voltage Lockout

Turn-On Voltage Threshold 32.5 34 35.5 Vdc

Turn-Off Voltage Threshold 30.5 32 33.5 Vdc

Lockout Hysteresis Voltage 1 2 3 Vdc

Maximum Input Current 100% Load, 36Vin 2.3 A No-Load Input Current 50 mA Off Converter Input Current 10 mA Inrush Current (I2t) 1 A2s Input Reflected-Ripple Current P-P thru 12µH inductor, 5Hz to 20MHz 20 mA Input Voltage Ripple Rejection 120 Hz 60 dB

OUTPUT CHARACTERISTICS

Output Voltage Set Point Vin=48V, Io=Io.max, Tc=25°C 14.85 15.00 15.15 Vdc Output Voltage Regulation

Over Load Io=Io, min to Io, max ±3 ±10 mV

Over Line Vin=36V to 75V ±3 ±10 mV

Over Temperature Tc=-40°C to125°C ±150 mV

Total Output Voltage Range Over sample load, line and temperature 14.55 15.45 V Output Voltage Ripple and Noise 5Hz to 20MHz bandwidth

Peak-to-Peak Full Load, 1µF ceramic, 10µF tantalum 120 200 mV

RMS Full Load, 1µF ceramic, 10µF tantalum 30 60 mV

Operating Output Current Range 0 4.4 A Output Over Current Protection Output Voltage 10% Low 110 140 %

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 300 mV

Negative Step Change in Output Current 75% Io.max to 50% Io.max 300 mV

Settling Time (within 1% Vout nominal) 200 us

Turn-On Transient

Start-Up Time, From On/Off Control 30 ms

Start-Up Time, From Input 30 ms

Maximum Output Capacitance Full load; 5% overshoot of Vout at startup 1000 µF

EFFICIENCY

100% Load 90.5 % 60% Load 90.5 %

ISOLATION CHARACT ERISTICS

Input to Output 2250 Vdc Isolation Resistance 10 MΩ Isolation Capacitance 1100 pF

FEATURE CHARACTERISTICS

Switching Frequency 380 420 460 kHz ON/OFF Control, Negative Remote On/Off logic

Logic Low (Module On) Von/off 0.7 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 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 1 mA

Leakage Current (for both remote on/off logic) Logic High, Von/off=15V 50 uA

Output Voltage Trim Range Output Voltage Remote Sense Range Output Over-Voltage Protection Over full temp range; % of nominal Vout 115 170 %

GENERAL SPECIFICATIONS

MTBF Io=80% of Io, max; Ta=25°C, airflow rate=300FLM T2.46 M hours Weight 16 grams Over-Temperature Shutdown Refer to figure 21 for measuring point 126 °C

Min. Typ. Max. Units

Pout ≦ max rated power Pout ≦ max rated power

-15 10 % 10 %

DS_V48SR15004_06122007

ELECTRICAL CHARACTERISTICS CURVES

Figure 1: Efficiency vs. load current for minimum, nominal, and maximum input voltage at 25°C

Figure 3: Typical full load input characteristics at room temperature

Figure 2: Power dissipation vs. load current for minimum,

nominal, and maximum input voltage at 25°C.

DS_V48SR15004_06122007

ELECTRICAL CHARACTERISTICS CURVES

)

For Negative Remote On/Off Logic

Figure 4: Turn-on transient at full rated load current (resistive load) (5 ms/div). Vin=48V. Top Trace: Vout, 5.0V/div; Bottom Trace: ON/OFF input, 2V/div

For Positive Remote On/Off Logic

Figure 6: Turn-on transient at full rated load current (resistive load) (5 ms/div). Vin=48V. Top Trace: Vout, 5.0V/div; Bottom Trace: ON/OFF input, 2V/div

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

Vin=48V. Top Trace: Vout: 5.0V/div, Bottom Trace: ON/OFF input, 2V/div

Figure 7: Turn-on transient at zero load current (5 ms/div).

Vin=48V. Top Trace: Vout, 5.0V/div; Bottom Trace: ON/OFF input, 2V/div

TBD

Figure 8: Output voltage response to step-change in load current (75%-50%-75% of Io, max; di/dt = 0.1A/µs). Load cap: 10µF tantalum capacitor and 1µF ceramic capacitor. Top Trace: Vout (200mV/div, 200us/div Scope measurement should be made using a BNC cable (length shorter than 20 inches). Position the load between 51 mm to 76 mm (2 inches to 3 inches) from the module

, Bottom Trace: Iout (2A/div).

Figure 9: Output voltage response to step-change in load

current (75%-50%-75% of Io, max; di/dt = 2.5A/µs). Load cap:

Ω

470µF, 35m capacitor. Top T race: Vout (50mV/div, 200us/div Iout (5A/div). Scope measurement should be made using a BNC cable (length shorter than 20 inches). Position the load between 51 mm to 76 mm (2 inches to 3 inches) from the module

ESR solid electrolytic capacitor and 1µF ceramic

, Bottom T race:

DS_V48SR15004_06122007

ELECTRICAL CHARACTERISTICS CURVES

Figure 10: Test set-up diagram showing measurement points for Input Terminal Ripple Current and Input Reflected Ripple Current. Note: Measured input reflected-ripple current with a simulated source Inductance (L possible battery impedance. Measure current as shown above

) of 12 µH. Capacitor Cs offset

TEST

Figure 11: Input Terminal Ripple Current, i

current and nominal input voltage with 12µH source impedance and 33µF electrolytic capacitor (200 mA/div, 1us/div)

Vo(+)

, at full rated output

StripCopper

Figure 12: Input reflected ripple current, is, through a 12µH source inductor at nominal input voltage and rated load current (20 mA/div, 1us/div)

10u

SCOPE

RESISTIV

LOAD

Vo(-)

Figure 13: Output voltage noise and ripple measurement test

setup

Figure 14: Output voltage ripple at nominal input voltage and rated load current (Io=4.4A)(50 mV/div, 1us/div) Load capacitance: 1µF ceramic capacitor and 10µF tantalum capacitor. Bandwidth: 20 MHz. Scope measurements should be made using a BNC cable (length shorter than 20 inches). Position the load between 51 mm to 76 mm (2 inches to 3 inches) from the module.

DS_V48SR15004_06122007

Figure 15: Output voltage vs. load current showing typical

current limit curves and converter shutdown points

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