Delta Electronics E24SR User Manual

Delphi Series E24SR, 66W Eighth Brick Family

FEATURES

 High efficiency: 90.5% @ 5V/ 12A

 Size: 58.4mm x 22.8mm x 10.0mm

(2.30” x 0.90” x 0.39”)

 SMD and Through-hole versions

 Industry standard pin out

 2:1 input range

 Fixed frequency operation

 Input UVLO, Output OTP, OCP, OVP

 Basic insulation

 2250V isolation

 Monotonic startup into normal and

pre-biased loads

 Output voltage trim ±10%

 No minimum load required

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

OHSAS 18001 certified manufacturing

facility

 UL/cUL 60950-1 (US & Canada)

recognized, and TUV (EN60950-1) certified

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

directive

DC/DC Power Modules: 24V in, 5V/12A out

The Delphi Series E24SR Eighth Brick, 24V input, single output, isolated

DC/DC converters are the latest offering from a world leader in powe

systems technology and manufacturing ― Delta Electronics, Inc. This

product family is available in either a through-hole or surface-mounted

package and provides up to 66 watts of power or 20A of output curren

(3.3V and below) in an industry standard footprint and pinout. The

E24SR converter operates from an input voltage of 18V to 36V and is

available in output voltages from 3.3V to 12V. Efficiency for the 5V outpu

is 90.5% at 12A full load. With creative design technology and

optimization of component placement, these converters possess

outstanding electrical and thermal performance, as well as extremel

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 safet requirements with basic insulation.

OPTIONS

 Positive On/Off logic  SMD pin  Short pin lengths available

APPLICATIONS

 Telecom / DataCom

 Wireless Networks

 Optical Network Equipment

 Server and Data Storage

 Industrial / Test Equipment

DATASHEET DS_E24SR05012_01032008

TECHNICAL SPECIFICATIONS

(TA=25°C, airflow rate=300 LFM, Vin=24Vdc, nominal Vout unless otherwise noted.)

PARAMETER NOTES and CONDITIONS E24SR05012 (Standard)

ABSOLUTE MAXIMUM RATINGS

Input Voltage

Continuous 36 Vdc

Transient (100ms) 100ms 50 Vdc Operating Temperature Refer to figure 21 for measuring point -40 118 °C Storage Temperature -55 125 °C Input/Output Isolation Voltage 2250 Vdc

INPUT CHARACTERISTICS

Operating Input Voltage 18 36 Vdc Input Under-Voltage Lockout

Turn-On Voltage Threshold 16 17 17.8 Vdc

Turn-Off Voltage Threshold 15 16 17 Vdc

Lockout Hysteresis Voltage 0.7 1 1.5 Vdc

Maximum Input Current 100% Load, 18Vin 3.9 A No-Load Input Current 80 150 mA Off Converter Input Current 3 10 mA Inrush Current (I2t) 0.1 A2s Input Reflected-Ripple Current P-P thru 12µH inductor, 5Hz to 20MHz 15 mA Input Voltage Ripple Rejection 120 Hz 55 dB

OUTPUT CHARACTERISTICS

Output Voltage Set Point Vin=24V, Io=Io.max, Tc=25°C 4.925 5.075 Vdc Output Voltage Regulation

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

Over Line Vin=18V to36V ±3 ±10 mV

Over Temperature Tc=-40°C to100°C ±50 mV

Total Output Voltage Range Over sample load, line and temperature 4.875 5 5.125 V Output Voltage Ripple and Noise 5Hz to 20MHz bandwidth

Peak-to-Peak Full Load, 1µF ceramic, 10µF tantalum 50 100 mV

RMS Full Load, 1µF ceramic, 10µF tantalum 15 30 mV

Operating Output Current Range 0 12 A Output Over Current Protection Output Voltage 10% Low 110 140 %

DYNAMIC CHARACTERISTICS

Output Voltage Current Transient 10µF Tan & 1µF Ceramic load cap, 0.1A/µs

Positive Step Change in Output Current 50% Io.max to 75% Io.max 150 250 mV

Negative Step Change in Output Current 75% Io.max to 50% Io.max 150 250 mV

Settling Time (within 1% Vout nominal) 150 us

Turn-On Transient

Start-Up Time, From On/Off Control 5 ms

Start-Up Time, From Input 5 ms

Back bias start-up

Back drive current limit while pin on-off is enabled Io=0

Back drive current limit while pin on-off is disabled Io=0

Maximum Output Capacitance Full load; CR mode;5% overshoot of Vout at startup 5000 µF

EFFICIENCY

100% Load 90.5 % 60% Load 90.5 %

ISOLATION CHARACTERISTICS

Input to Output 2250 Vdc Isolation Resistance 10 MΩ Isolation Capacitance 1500 pF

FEATURE CHARACTERISTICS

Switching Frequency 350 kHz ON/OFF Control, Negative Remote On/Off logic

Logic Low (Module On) -0.7 0.5 V

Logic High (Module Off) 3 18 V

ON/OFF Control, Positive Remote On/Off logic

Logic Low (Module Off) -0.7 0.5 V

Logic High (Module On) 3 18 V

On/off pin open circuit voltage 9.6 V

On/off pin pull down resistance 12 Kohm Output Voltage Trim Range Output Voltage Remote Sense Range Output Over-Voltage Protection Over full temp range; 5.75 7 V

GENERAL SPECIFICATIONS

MTBF Io=80% of Io, max; Ta=25°C, 300LFM airflow 3.86 M hours Weight 22.0 grams Over-Temperature Shutdown Refer to figure 21 for measuring point 123 °C

Min. Typ. Max. Units

≤ 90% of nominal output voltage

Pout ≦ max rated power Pout ≦ max rated power

0.1 50 m

-10 +10 % +10 %

DS_E24SR05012_01032008

ELECTRICAL CHARACTERISTICS CURVES

Efficiency (%)

24681012

24Vin

36Vin

Output Current (A )

18Vin

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

maximum input voltage at 25°C

4.0

3.5

3.0

2.5

2.0

1.5

Input Curr ent(A)

1.0

0.5

0.0 18 20 22 24 26 28 30 32 34 36

Input Voltage (V)

7.0

6.0

5.0

4.0

Loss (W)

3.0

2.0

1.0

36Vin

246810

18Vin

24Vin

Output Current ( A)

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_E24SR05012_01032008

ELECTRICAL CHARACTERISTICS CURVES

For Negative Remote On/Off Logic

Figure 4: Turn-on transient at full rated load current (resistive load) (2 ms/div). Vin=24V. Top Trace: Vout, 2.0V/div; Bottom Trace: ON/OFF input, 10V/div

For Positive Remote On/Off Logic

Figure 5: Turn-on transient at zero load current (2 ms/div).

Vin=24V. Top Trace: Vout: 2.0V/div, Bottom Trace: ON/OFF

input, 10V/div

Figure 6: Turn-on transient at full rated load current (resistive load) (2 ms/div). Vin=24V. Top Trace: Vout, 2.0V/div; Bottom

Trace: ON/OFF input, 10V/div

DS_E24SR05012_01032008

Figure 7: Turn-on transient at zero load current (2 ms/div).

Vin=24V Top Trace: Vout, 2.0V/div; Bottom Trace: ON/OFF input, 10V/div

ELECTRICAL CHARACTERISTICS CURVES

)

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 (100mV/div, 200us/div

/div). Scope measurement should be made using a BNC

(5 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

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

current (75%-50%-75% of Io, max; di/dt = 1 470µF, 35m capacitor. Top Trace: Vout (100mV/div, 200us/div (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

/µs). Load cap:

, Bottom Trace: Iout

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, 2us/div)

, at full rated output

DS_E24SR05012_01032008

+ 10 hidden pages