Delta Electronics L36SA User Manual

Delphi Series L36SA, 2” x 1.6”, 50W Family

FEATURES

 High Efficiency: 88% @ 3.3V/15A

 Size: 49.6mm x 39.4mm x 8.9mm

(1.95”x1.55”x0.35”)

 Industry standard pin out

 Fixed frequency operation

 Input UVLO, OTP, Output OCP, OVP, (auto

recovery)

 Monotonic startup into normal and

pre-biased loads

 2250V isolation and basic insulation

 No minimum load required

 4:1 Input voltage range

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

OHSAS 18001 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 Module: 18~75V in, 3.3V/15A out

The Delphi Series L36SA, 2” x 1.6”, 18~75V input, single output,

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

power systems technology and manufacturing - Delta Electronics,

Inc. This L36SA series provides up to 50 watts of power or 15A of

output current (3.3V) in an industry standard 2” x 1.6” form factor

and pinout. The Delphi L36SA series operates from a wide 18~75V

(4:1) input voltages. With creative design technology and

optimization of component placement, these converters possess

outstanding electrical and thermal performances, as well as

extremely high reliability under highly stressful operating conditions.

All models are fully protected from abnormal input/output voltage,

current, and temperature conditions. The Delphi Series converters

meet all safety requirements with basic insulation. An optional heat

spreader is available for extended operation.

OPTIONS

 Positive On/Off logic

 Sense

 Heat spreader

APPLICATIONS

 Telecom/Datacom

 Wireless Networks

 Optical Network Equipment  Server and Data Storage

 Industrial/Testing Equipment

DATASHEET DS_L36SA3R315_02142007

TECHNICAL SPECIFICATIONS

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

PARAMETER NOTES and CONDITIONS L36SA3R315 (Standard)

ABSOLUTE MAXIMUM RATINGS

Input Voltage

Continuous 80 Vdc

Maximum input voltage 100 Vdc Operating Temperature Refer to Figure21 for measuring point -40 130 °C Storage Temperature -55 125 °C Input/Output Isolation Voltage 2250 Vdc

INPUT CHARACTERISTICS

Operating Input Voltage 18 75 Vdc Input Under-Voltage Lockout

Turn-On Voltage Threshold 16 17 18 Vdc

Turn-Off Voltage Threshold 15 16 17 Vdc

Lockout Hysteresis Voltage 0.75 1 1.5 Vdc

Maximum Input Current 100% Load, 18Vin 4 A No-Load Input Current 40 mA Off Converter Input Current 4 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 3.267 3.3 3.333 Vdc Output Voltage Regulation

Over Load Io=Io,min to Io,max ±5 ±15 mV

Over Line Vin=18V to 75V ±5 ±10 mV

Over Temperature Ta=-40°C to 85°C ±30 mV

Total Output Voltage Range Over sample load, line and temperature 3.25 3.35 V Output Voltage Ripple and Noise 5Hz to 20MHz bandwidth

Peak-to-Peak Full Load, 1µF ceramic, 10µF tantalum 40 80 mV

RMS Full Load, 1µF ceramic, 10µF tantalum 10 20 mV

Operating Output Current Range 0 15 A Output over current protection 110 150 %

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 mV

Negative Step Change in Output Current 75% Io.max to 50% Io.max 80 mV

Settling Time (within 1% Vout nominal) 150 us

Turn-On Transient

Start-Up Time, From On/Off Control 20 ms

Start-Up Time, From Input 20 ms

Maximum Output Capacitance Full load; 5% overshoot of Vout at startup 4000 µF

EFFICIENCY

100% Load 87 % 60% Load 87 %

ISOLATION CHARACTERISTICS

Input to Output 2250 Vdc Isolation Resistance 100 MΩ Isolation Capacitance 1500 pF

FEATURE CHARACTERISTICS

Switching Frequency 300 kHz ON/OFF Control, Negative Remote On/Off logic

Logic Low (Module On) Von/off at Ion/off=1.0mA 0.7 V

Logic High (Module Off) Von/off at Ion/off=0.0 µA 2 18 V

ON/OFF Control, Positive Remote On/Off logic

Logic Low (Module Off) Von/off at Ion/off=1.0mA 0.7 V

Logic High (Module On) Von/off at Ion/off=0.0 µA 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 (option) Output Over-Voltage Protection Over full temp range; % of nominal Vout 4 V

GENERAL SPECIFICATIONS

MTBF Io=80% of Io, max; Ta=25°C 3.7 M hours Weight 24.2 Grams Over-Temperature Shutdown Refer to Figure21 for measuring point 134 °C

Min. Typ. Max. Units

Across Pins 9 & 5, Pout ≦ max rated power

Pout ≦ max rated power

-10% 10% % 10 %

DS_L36SA3R315_02142007

ELECTRICAL CHARACTERISTICS CURVES

48Vin

24Vin

18Vin

EFFICIENCY (%)

123456789101112131415

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

3.3

2.7

2.4

2.1

1.8

1.5

INPUT CURRENT(A)

1.2

0.9

0.6

0.3

16 21 26 31 36 41 46 51 56 61 66 71

75Vin

OUTPUT CURRENT (A)

INPUT VOLTAGE(V)

LOSS (W)

75Vin

18Vin

24Vin

123456789101112131415

OUTPUT CURRENT (A)

48Vin

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

nominal, and maximum input voltage at 25°C.

Figure 3: Typical full load input characteristics at room temperature

DS_L36SA3R315_02142007

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, 1V/div; Bottom Trace: ON/OFF input, 5V/div

For Positive Remote On/Off Logic

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

Vin=48V.Top Trace: Vout, 1V/div; Bottom Trace: ON/OFF input, 5V/div

Figure 6: Turn-on transient at full rated load current (resistive load) (5 ms/div). Vin=48V.Top Trace: Vout, 1V/div; Bottom Trace: ON/OFF input, 5V/div

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

Vin=48V.Top Trace: Vout, 1V/div, Bottom Trace: ON/OFF input, 5V/div

DS_L36SA3R315_02142007

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