Performance/Functional Specifications
Typical @ TA = +25°C under nominal line voltage and full-load conditions, unless noted. ➀
➀ All models are specified with no external I/O capacitors.
➁ See Technical Notes/Graphs for details.
➂ Applying a voltage to the On/Off Control (pin 3) when no input power is applied to the
converter can cause permanent damage to the converter.
➃ Output noise may be further reduced with the addition of additional external output capacitors.
See Technical Notes.
➄ The On/Off Control is designed to be driven with open-coolector logic or the application of
appropriate voltage levels. Voltages may be referenced to the –Input (pin 2).
➅ Input Ripple Current is tested/specified over a 5-20MHz bandwidth with an external 33µF
input capacitor and a simulated source impedance of 220µF and 12µH. See I/O Filtering, Input
Ripple Current and Output Noise for details.
Input
Input Voltage Range:
D12A Models 10-18 Volts (12V nominal)
D24A Models 18-36 Volts (24V nominal)
D48A Models 36-75 Volts (48V nominal)
Overvoltage Shutdown:
D12A Models 19-21 Volts
D24A Models 37-40 Volts
D48A Models 77-81 Volts
Start-Up Threshold: ➂
D12A Models 9.4-10 Volts
D24A Models 16.5-18 Volts
D48A Models 34-36 Volts
Undervoltage Shutdown: ➂
D12A Models 7-8.5 Volts
D24A Models 15.5-17.5 Volts
D48A Models 32.5-34.5 Volts
Input Current
Normal Operating Conditions See Ordering Guide
Standby Mode (Off, OV, UV) 5mA
Input Reflected Ripple Current ➅ 10 mAp-p
Input Filter Type Pi
Reverse-Polarity Protection Brief duration, 5A maximum.
On/Off Control: ➃ ➄
C Models On = open or 13V- +VIN, IIN = 1mA max.
Off = 0-0.8V, IIN = 1mA max.
N Models On = 0-0.5V, IIN = 3mA max.
Off = open or 3.5- +VIN, IIN = 1mA max.
Output
VOUT Accuracy (balanced half load) ±2.0%, maximum
Minimum Load Requirement ➁ 10%
Ripple/Noise (20MHz BW) ➀ ➅ See Ordering Guide
Line/Load Regulation See Ordering Guide
Efficiency See Ordering Guide
Isolation Voltage 1500Vdc, minimum
Isolation Capacitance 550pF
Isolation Resistance 10MΩ
Current Limit Inception (@ 98% VOUT)
±5V Models 1.9-2.5A
±12V Models 1-1.5A
±15V Models 0.85-1.2A
Short-Circuit Current
±5V Models 800mA maximum
±12V Models 700mA maximum
±15V Models 700mA maximum
Overvoltage protection Output voltage comparator
±5V Models 5.45-7.15 Volts
±12V Models 13-15.8 Volts
±15V Models 16.2-19.8 Volts
Maximum Capacitive Loading 1000µF (per output)
Temperature Coefficient ±0.02% per °C
Input Voltage:
Continuous:
D12A Models 23 Volts
D24A Models 42 Volts
D48A Models 81 Volts
Transient (100msec):
D12A Models 50 Volts
D24A Models 50 Volts
D48A Models 100 Volts
On/Off Control (pin 3) Max. Voltages
Referenced to –Input (pin 2)
"C" Suffix +VIN (+18 Volts)
"N" Suffix +7 Volts
Input Reverse-Polarity Protection Current must be <5 Amps. Brief
duration only. Fusing recommended.
Output Current Current limited. Devices can withstand
sustained output short circuits without
damage.
Case Temperature 120°C
Storage Temperature –40 to +120°C
Lead Temperature See soldering guidelines
These are stress ratings. Exposure of devices to greater than any of these conditions may
adversely affect long-term reliability. Proper operation under conditions other than those
listed in the Performance/Functional Specifications Table is not implied.
Absolute Maximum Ratings
Dynamic Characteristics
Transient Response:
(50-100% load step to 2% VOUT) 250µsec maximum
Start-Up Time:
VIN to VOUT 35msec
On/Off to VOUT 30msec
Switching Frequency 300kHz (±30kHz)
Environmental
MTBF Bellcore, ground fixed, fullpower
25°C ambient, 1 million hours
Operating Temperature (ambient):
-40 to +85°C with derated power (see derating curves)
Thermal Shutdown 115°C
Storage Temperature –40 to +120°C
Flammability UL 94V-0
Physical
Dimensions 1" x 2" x 0.48" (25.4 x 50.8 x 12.19mm)
Case Material Diallyl Phthalate
Pin Material Gold-plate over copper alloy
Weight 1.19 ounces (34 grams)
Primary to Secondary Insulation Level Functional
BWR Series
15-17W, Dual Output DC/DC Converters
MDC_BWR15-17W.D01 Page 3 of 9
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