DLV-3.3/6-1.87-D12N Просмотр технического описания (PDF) - DATEL Data Acquisition products
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DLV-3.3/6-1.87-D12N
DATEL Data Acquisition products
DLV-3.3/6-1.87-D12N Datasheet PDF : 5 Pages
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DLV Series
30W, DUAL OUTPUT, MIXED-VOLTAGE DC/DC CONVERTERS
Physical
Dimensions
2" x 2" x 0.5" (50.8 x 50.8 x 12.7mm)
Case Material
Diallyl phthalate, UL94V-0 rated
Pin Material
Brass, solder coated
Weight:
TBD
Primary to Secondary Insulation Level Operational
➀ All models are specified with external TBD ceramic output capacitors.
➁ See Technical Notes/Graphs for details.
➂ Devices may be order with opposite polarity. Sync pin available with "S" suffix. See Part
Number Suffixes and Technical Notes for details.
➃ Applying a voltage to On/Off Control (pin 4) or the Sync (pin 3) when no input power is
applied to the converter may cause permanent damage.
➄ Output noise may be further reduced with the installation of additional external output
capacitors. See Technical Notes.
➅ On/Off control is designed to be driven with open collector or by appropriate voltage
levels. Voltages must be referenced to the –Input (pin 2).
➆ Demonstrated MTBF available on request.
➇ Trim function for the higher of two voltages available with "T" suffix. See Part
Number Suffixes and Technical Notes for details.
Absolute Maximum Ratings
Input Voltage:
Continuous:
D12 Models
D2A Models
D48 Models
Transient (100msec): D12 Models
D24 Models
D48 Models
23 Volts
42 Volts
81 Volts
25 Volts
50 Volts
100 Volts
Input Reverse-Polarity Protection ➁
D12A Models
D24A Models
D48A Models
Input Current must be limited. TBD
minute duration. Fusing recommended.
6 Amps
4 Amps
2 Amps
Output Current ➁
Current limited. Devices can withstand
an indefinite output short circuit.
On/Off Control (Pin 4) Max. Voltages
Referenced to –Input (pin 2)
No Suffix
"N" Suffix
+VIN
+8 Volts
Sync Control (Pin 3) Max. Voltages
"S" Suffix
+5.7 Volts
Storage Temperature
–40 to +120°C
Lead Temperature (Soldering, 10 sec.) +300°C
These are stress ratings. Exposure of devices to 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, nor recommended.
TECHNICAL NOTES
Trimming Output Voltages
These DLV converters have a trim capability (pins 9 & 5) that allow users
to independently adjust the output voltages ±5%. (Note: pin 5 is an option,
see ordering information.) Adjustments to the output voltages can be accom-
plished via a trim pot, Figure 2, or a single fixed resistor as shown in Figures
3 and 4. A single fixed resistor can increase or decrease the output voltage
depending on its connection. Fixed resistors should have absolute TCR's less
than 100ppm/°C to minimize sensitivity to changes in temperature.
A single resistor connected from the Trim pin 9 to +Output (pin 8), see Figure
3, will decrease the lower output voltage. A resistor connected from Trim pin 9
to Output Return (pin 7) will increase the lower output voltage. See Figure 4.
Similarly, the higher output voltage can be adjusted using a single resistor
connected from the Trim (pin 5) to +Output (pin 6) or to Output Return (pin
7). See Figures 3 and 4.
1
+INPUT
+3.3V TRIM * 5
6
+3.3V OUTPUT
2
–INPUT
3
SYNC *
4 ON/OFF
CONTROL
OUTPUT 7
RETURN
8
+2.5V OUTPUT
9
+2.5V TRIM
20kΩ
5-22
TURNS
+3.3V
LOAD
20kΩ
5-22
TURNS
+2.5V
LOAD
* OPTIONAL PIN
Figure 2. Trim Connections Using A Trim Pot
1
+INPUT
2
–INPUT
3
SYNC *
4 ON/OFF
CONTROL
5
+3.3V TRIM *
6
+3.3V OUTPUT
RTRIM DOWN
OUTPUT 7
RETURN
8
+2.5V OUTPUT
+3.3V
LOAD
+2.5V
LOAD
9
+2.5V TRIM
RTRIM DOWN
* OPTIONAL PIN
Figure 3. Trim Connections To Decrease Output Voltages Using Fixed Resistors
3.3 Volt Trim Down
LN RTDOWN (kΩ) =
3.48(VO – 1.577)
3.3 – VO
–28.7
2.5 Volt Trim Down
LN RTDOWN (kΩ) =
2.41(VO – 1.18)
2.5 – VO
–19.7
1.8 Volt Trim Down
LN RTDOWN (kΩ) =
1.73(VO – 0.86)
1.8 – VO
–14.17
4
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