Datasheet

Dual Output BWR Models
Mixed Voltage, 5V AND 3.3V, 2” x 2”
33 Watt DC/DC Converters
MDC_BWR 33W Models.A05 Page 3 of 12
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Output (continued)
Short Circuit Current:
➁
5V Output 5 Amps average, continuous
3.3V Output 6 Amps average, continuous
Overvoltage Protection:
➁
Magnetic feedback
5V Output 6.8 volts
3.3V Output 4.5Volts
Maximum Capacitive Loading
D12 Models 3.3V 1000µF
5V 470µF
D24, D48 Models 3.3V 2000µF
5V 1000µF
Dynamic Characteristics
Dynamic Load Response
➁
5V (50-100% load step to 4% VOUT) 300µsec maximum
3.3V (50-100% load step to 2.5% V
OUT) 300µsec maximum
Start-Up Time
➁
VIN to VOUT 20msec maximum
On/Off to V
OUT 15msec maximum
Switching Frequency 285kHz (±15kHz)
Environmental
MTBF
➅
Bellcore, ground fi xed, full power,
+25°C operating ambient temperature
D12 Models 1.3 million hours
D24/D48 Models 1.67 million hours
Operating Temperature (Ambient) ➁
Without Derating:
D12 Models –40 to +50°C
D24 Models –40 to +60°C
D48 Models –40 to +68°C
With Derating To +100°C (See Derating Curves)
Case Temperature
Maximum Operational +100°C
For Thermal Shutdown
➁
+110°C minimum, +117°C maximum
Storage Temperature –40 to +120°C
Flammability UL 94V-0
Physical
Dimensions 2" x 2" x 0.45" (50.8 x 50.8 x 11.43mm)
Internal Case Connection
D12/D24 Models –Input (Pin 2)
D48 Models +Input (Pin 1)
Case Material Corrosion resistant steel with
non-conductive, epoxy-based, black
enamel fi nish and plastic baseplate
Pin Material Gold-plated copper alloy
Weight 2.7 ounces (76.5 grams)
➀ Balanced “full-load” is 5V @ 3.3A/3.3V @ 5A. All models are specifi ed with external 1µF
ceramic output capacitors.
➁ See Technical Notes/Graphs for details.
➂ Applying a voltage to On/Off Control (pin 4) when no input power is applied to the converter
may cause permanent damage.
➃ Output noise may be further reduced with the installation of additional external output capacitors.
See Technical Notes.
➄ On/Off control is designed to be driven with open collector or by appropriate voltage levels.
Voltages must be referenced to the input return pin (–Input).
➅ Demonstrated MTBF available on request.
Input
Input Voltage Range:
D12 Models 10-18 Volts (12V nominal)
D24 Models 18-36 Volts (24V nominal)
D48 Models 36-75 Volts (48V nominal)
Overvoltage Shutdown:
➁
D12 Models 19-23 Volts (21V nominal)
D24 Models 37-42 Volts (40V nominal)
D48 Models 77-81 Volts (79V nominal)
Start-Up Threshold:
➁
D12 Models 9-10 Volts (9.3V nominal)
D24 Models 16.5-18 Volts (17V nominal)
D48 Models 34-36 Volts (35V nominal)
Undervoltage Shutdown:
➁
D12 Models 8.5-9.6 Volts (9.3V nominal)
D24 Models 16-17 Volts (16.5V nominal)
D48 Models 32.5-35 Volts (34V nominal)
Input Current:
Normal Operating Conditions See Ordering Guide
Standby Mode:
Off, OV, UV, Thermal Shutdown 10mA typical
Input Refl ected Ripple Current:
Source Impedance <0.1, no external input fi ltering
D12 Models 200mAp-p (150mAp-p typical)
D24/D48 Models 250mAp-p (225mAp-p typical)
Internal Input Filter Type Pi (0.022µF - 4.7µH - 2.46µF)
Reverse-Polarity Protection:
➁
D12 Models 1 minute duration, 6A maximum
D24 Models 1 minute duration, 4A maximum
D48 Models 1 minute duration, 2A maximum
On/Off Control (Pin 4):
➁ ➂ ➄
D12, D24 & D48 Models On = open or 13V to +V
IN, IIN = 50µA max.
Off = 0-0.8V, I
IN = 1mA max.
Output
VOUT Accuracy:
5V Output ±3% maximum
3.3V Output ±1.5% maximum
Minimum Loading Per Specifi cation No load, see Performance Specifi cations
Ripple/Noise (20MHz BW)
➁ ➃ See Ordering Guide
Line/Load Regulation
➁ See Ordering Guide
Effi ciency See Ordering Guide / Effi ciency Curves
Cross Regulation:
➁
5V Output (5V@0.6A, 3.3V@0.7-7A) ±6% maximum
3.3V Output (3.3V@0.7A, 5V@0.6-6A) ±0.5% maximum
Trim Range
➁ ±5%
Isolation Voltage:
Input-to-Output 1500Vdc minimum
Isolation Capacitance 470pF
Isolation Resistance 100M
Primary to Secondary Insulation Level
D12/D24 Models Operational
D48 Models Basic
Temperature Coeffi cient ±0.02%/per°C
Current Limit Inception:
➁
5V @ 95% VOUT (3.3V @ 0A) 7.6-9.0 Amps
3.3V @ 98.5% V
OUT (5V @ 0A) 11.3-12.7 Amps
Performance/Functional Specifi cations
Typical @ TA = +25°C under nominal line voltage, balanced "full-load" conditions, unless noted. ➀