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Series DC2B

HIGH POWER DC-DC CONVERTER
Hi Input Voltage Range: 700 - 1200 VDC
Output Voltages: 5 VDC to 300 VDC Standard
Hi Reliability Isolated Regulated
Fixed Operating Frequency: 100Khz
DC-DC Converter to 300 Watts

 

INPUT VOLTAGE: 700 - 1200 VDC (Input is reverse polarity protected.)
Special Output Voltages Available: Consult Factory
Regulated Output Voltage: 5 VDC to 300 VDC Standard
Fully Encapsulated
Made in USA

TYPICAL FEATURES/ELECTRICAL CHARACTERISTICS

Input Voltage: 700 - 1200 Vdc

Output Power: 150 to 300 watts (See Chart)

Output Voltage Ripple: 75-500 mV (See Chart)

Operating Temperature: 0°C to 85°C
case temperature. See application notes for proper thermal considerations. Available with -20°C and -40°C operating temperature range - Consult Factory

Isolation:
From Input to DC Output: 4242 VDC
From Input or DC Output to Case: 2121VDC

Current Limit Setpoint: 130% of full load rating (Typical)

Overtemperature Shutdown

Operating Frequency: 100 Khz Fixed

UNDERVOLTAGE SETPOINT IS 670VDC (TYP)

OVERVOLTAGE SETPOINT IS 1230VDC (TYP)

 

Weight: 340 Grams Typical
All dimensions are in Inches
NOTE: The torque for mounting screws must be 6 to 9 In-Lbs.

Weight: 340 Grams Typical
All dimensions are in Inches
NOTE: The torque for mounting screws must be 6 to 9 In-Lbs.

 

Note: Pins 6 and 7 are for models with output voltages up to and including 48 Volts. They are not on the higher voltage models (greater that 48 Volts)
PIN NO. FUNCTION
1 DC IN +
2 DC IN -
3 No Connection
4 -V Out
5 + V Out
6 - Sense (See Note)
7 + Sense (See Note

 

 

 
Pico
Part
No.		 Output
Voltage
VDC

Max.
Load
Current
(A)
**

Max.
Output
Power
(watts)
**

 EFF @
Full
Load
(%)*		 Output
Ripple
Full
Load
1-1 MHz BW
mv p-p*		 Output Voltage
Toler-
ance
(±%)*		 V Ld.
Reg
10-100%
Load
(±%)*		 Line
Regu-
lation
(±%)*		 Price
(US $)
DC2B-5S 5 30 150 76 100 1.0 1.5 0.2 270.33
DC2B-9S 9 27.8 250 78 100 1.0 1.5 0.2 270.33
DC2B-12S 12 25 300 80 150 0.5 1.5 0.2 270.33
DC2B-15S 15 20 300 80 150 0.5 1.5 0.2 270.33
DC2B-24S 24 12.5 300 81 250 0.5 1.0 0.2 270.33
DC2B-28S 28 10.71 300 82 300 0.5 1.0 0.2 270.33
DC2B-48S 48 6.25 300 82 500 0.5 1.0 0.2 325.71
DC2B-100S 100 2.50 250 85 250 1.0 1.0 0.2 372.47
DC2B-125S 125 2.00 250 85 250 1.0 1.0 0.2 372.47
DC2B-150S 150 1.67 250 85 350 1.0 1.0 0.2 372.47
DC2B-175S 175 1.43 250 85 350 1.0 1.0 0.2 372.47
DC2B-200S 200 1.25 250 85 400 1.0 1.0 0.2 465.60
DC2B-225S 225 1.11 250 85 400 1.0 1.0 0.2 465.60
DC2B-250S 250 1.00 250 85 500 1.0 1.0 0.2 465.60
DC2B-275S 275 0.91 250 85 500 1.0 1.0 0.2 465.60
DC2B-300S 300 0.83 250 85 500 1.0 1.0 0.2 465.60
* All specifications are typical at nominal (900Vdc) input, full load and 25°C baseplate temperature unless otherwise stated.
** Using proper thermal considerations as outlined in the application notes.

 

CH HEATSINK
CV HEATSINK

All dimensions are in inches  ()=mm
Approx. weight = 145 grams


NOTE:  Additional Heatsink options, consult factory
Approx. Weight = 145 grams

 

 
TYPE CH
$26.40
TYPE CV
$26.40
TYPE TI
$3.30


 
 
 

THERMAL INTERFACE
PART  TI

Alloy Aluminum Substrate

Thermal Conductivity, (BTU-in/hr ft²  ºF) ----1530
Coefficient of Thermal Expansion (25-100ºC, 10-6 in./in. ºF ---13.1
Hardness, Brinnell B ----23
Endurance Limit, psi. ----5000
Standard Thickness (inches) ---.002

Thermal Considerations

  DC2B Series
.
Baseplate
Heatsink
CV
Heatsink CH
Free Air
4.8
3.3
2.8
200 LFM
2.6
1.6
0.9
400 LFM
1.6
1.0
0.6
600 LFM
1.3
0.7
0.5
800 LFM
1.1
0.6
0.4
1000 LFM
0.9
0.5
0.35


 
 

EXAMPLE 1:
An DC2B-24S module has an efficiency of 81%. What is themaximum ambient temperature if 100 Watts of power is needed?

 

 

 

 

EXAMPLE 2:
What would be the maximum output power
for an DC2B-24S module at an ambient temperature of 50°C with an efficiency of 81%?

 

 

 

EXAMPLE 3:
At a maximum ambient temperature of
50°C and an efficiency of 81%, how could an DC2B-24S module be used if 200 Watts of output power is required?

 

 

 

 

 

APPLICATION NOTES

Remote Sense terminals (only on models with output voltages of 48V and below):

Remote Sense terminals must be connected for the unit to operate properly. When connected in local sense (+S connected to +V output terminal and -S connected to -V output terminal), the output voltage is regulated at the output terminals.

If your load is connected more than a few inches away from the unit and you want to regulate the output voltage ON the load, remote sense is required. This means connecting the +S connection at the end of the +V wire (at the load), and the -S connection at the end of the -V wire (at the load). Since the load wires have current flowing through them and they have a certain resistance, there will be a voltage drop in them so that the output voltage at the load will be lower than the output voltage of the unit. Remote sense will prevent this be compensating for up to 1V of drop in the load wires. This means the output voltage of the unit will be up to 1V higher than the nominal value, so that at the load, the voltage will be the nominal value.

Example of local and remote sense connections, using the DC2B-12S with a 0.2V drop in the wires connecting the +V and -V output terminals to the load.

Vout = Voltage on the output voltage terminals of the unit.

Vload = Voltage on the load where the wires are connected.

Vout = Vload + Vwire1 + Vwire2

So, Vload = Vout - Vwire1 - Vwire2

With local sense, Vout is regulated at 12V
So, Vout = 12V
Vload = Vout -Vwire1 - Vwire2
Vload = 12V - .2V - .2V

With remote sense, Vload is regulated at 12V
So, Vload = 12 V
Vout = Vload + Vwire + Vwire2
Vout = 12V +.2V + .2V = 12.4 Volts
The voltage drops in the wires connecting the +V and -V output terminals of the unit and the load depend on the size of the wire )or pcboard trace) and the current flowing through them.

 

For immediate engineering assistance or to place an order:
Call Toll Free: 800-431-1064

PICO Electronics, Inc.

143 Sparks Ave. Pelham, NY 10803
Tel: 914-738-1400
Fax: 914-738-8225