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Parameter Min Typ Max Unit Notes

Efficiency 87 88.4 % Nominal input; full load; 25°C

Ripple and noise 240 300 mV p-p; Nominal input; full load; 20 MHz bandwith

Output OVP setpoint 40.4 41.9 43.4 Volts 25°C; recycle input voltage to restart (>100 ms off)

Dissipation, standby 17.1 19 Watts No load

Load regulation ±0.02 ±0.2 % No load to full load; nominal input

Load current 0 13.9 Amps

Current limit 14.1 16 18.8 Amps Output voltage 95% of nominal

Short circuit current 9.73 16 18.8 Amps Output voltage <250 mV

36 Vout, 500 W (e.g. V300A36C500BL)

Parameter Min Typ Max Unit Notes

Efficiency 87 88.2 % Nominal input; full load; 25°C

Ripple and noise 135 169 mV p-p; Nominal input; full load; 20 MHz bandwith

Output OVP setpoint 40.4 41.9 43.4 Volts 25°C; recycle input voltage to restart (>100 ms off)

Dissipation, standby 11.3 13.2 Watts No load

Load regulation ±0.02 ±0.2 % No load to full load; nominal input

Load current 0 11.1 Amps

Current limit 11.3 12.8 15 Amps Output voltage 95% of nominal

Short circuit current 7.77 12.8 15 Amps Output voltage <250 mV

36 Vout, 400 W (e.g.V300A36C400BL)

Parameter Min Typ Max Unit Notes

Efficiency 87.5 89 % Nominal input; full load; 25°C

Ripple and noise 100 125 mV p-p; Nominal input; full load; 20 MHz bandwith

Output OVP setpoint 53.7 55.7 57.7 Volts 25°C; recycle input voltage to restart (>100 ms off)

Dissipation, standby 12.6 13.3 Watts No load

Load regulation ±0.02 ±0.2 % No load to full load; nominal input

Load current 0 10.4 Amps

Current limit 10.7 12.1 14.1 Amps Output voltage 95% of nominal

Short circuit current 7.35 12.1 15.1 Amps Output voltage <250 mV

48 Vout, 500 W (e.g. V300A48C500BL)

Parameter Min Typ Max Unit Notes

Efficiency 87 88.3 % Nominal input; full load; 25°C

Ripple and noise 280 350 mV p-p; Nominal input; full load; 20 MHz bandwith

Output OVP setpoint 53.7 55.7 57.7 Volts 25°C; recycle input voltage to restart (>100 ms off)

Dissipation, standby 15.4 16.4 Watts No load

Load regulation ±0.02 ±0.2 % No load to full load; nominal input

Load current 0 8.3 Amps

Current limit 8.49 9.58 11.3 Amps Output voltage 95% of nominal

Short circuit current 5.83 9.58 11.3 Amps Output voltage <250 mV

48 Vout, 400 W (e.g. V300A48C400BL)

MODULE SPECIFIC OPERATING SPECIFICATIONS (CONT.)

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Module Enable/Disable

The module may be disabled by pulling PC below 2.3 V with

respect to the –Input. This may be done with an open collector

transistor, relay, or optocoupler. Multiple converters may be

disabled with a single transistor or relay either directly or via

“OR’ing” diodes. See Figure 1.

Primary Auxiliary Supply

At 5.7 V, PC can source up to 1.5 mA. In the example shown

in Figure 3, PC powers a module enabled LED.

Module Alarm

The module contains “watchdog” circuitry which monitors

input voltage, operating temperature and internal operating

parameters. In the event that any of these parameters are

outside of their allowable operating range, the module will

shut down and PC will go low. PC will periodically go high

and the module will check to see if the fault (as an example,

overtemperature) has cleared. If the fault has not been cleared,

PC will go low again and the cycle will restart. The SC pin

will go low in the event of a fault and return to its normal

state after the fault has been cleared. See Figures 2 and 4.

+IN

–IN

Disable

Disable = PC <2.3 V

Figure 1 — Module enable/disable.

Figure 3 — LED on-state indicator.

+IN

–IN

4 kΩ

"Module

Enabled"

+IN

–IN

Optocoupler

4 kΩ

Alarm

1.00V

+OUT

–S

–OUT

Comparator

+OUT

–S

– OUT

+IN

–IN

Input Undervoltage

2-20 ms typ.

f (V

)

Auto

Restart

5.7 Vdc

(0-3 mA)

50 Ω

SW2

SW3

1.23

Vdc

6 K

1 K

SW1

SW1, 2, & 3

shown in

"Fault" position

Input Overvoltage (See Note 1)

Overtemperature

Module Faults

Not applicable for 300 Vdc input family

1 M

Figure 2 — PC/SC module alarm logic.

Figure 5 — Isolated on-state indicator.

2–20 ms typical

Fault

1.23 V

5.7 V

40 μs typ.

Figure 4 — PC/SC module alarm timing.

Figure 6 — Secondary side on-state indicator.

CONTROL FUNCTIONS - PC PIN

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Output Voltage Programming

The output voltage of the converter can be adjusted or

programmed via fixed resistors, potentiometers or voltage

DACs. See Figures 7 and 8.

Figure 8 — Output voltage trim up circuit.Figure 7 — Output voltage trim down circuit.

+OUT

–S

–OUT

Trim Up

Load

Error

Amp

1 kΩ

1.23 V

0.033 μF

1,000 (Vout –1.23) Vnom

1.23 (Vout – Vnom)

(ohms) =

– 1,000

Load

+OUT

–S

–OUT

Trim Down

Error

Amp

1 kΩ

1.23 V

0.033 μF

1,000 Vout

Vnom – Vout

(ohms) =

Trim Down

1. This converter is not a constant power device – it has a

constant current limit. Hence, available output power is

reduced by the same percentage that output voltage is

trimmed down. Do not exceed maximum rated output current.

2. The trim down resistor must be connected to the –Sense pin.

CONTROL FUNCTIONS - SC PIN

Trim Up

1. The converter is rated for a maximum delivered power. To

ensure that maximum rated power is not exceeded, reduce

maximum output current by the same percentage increase in

output voltage.

2. The trim up resistor must be connected to the +Sense pin.

3. Do not trim the converter above maximum trim range

(typically +10%) or the output over voltage protection

circuitry may be activated.

Trim resistor values calculated automatically:

On-line calculators for trim resistor values are available

on the vicor website at:

vicorpower.com/tools.

Resistor values can be calculated for fixed trim up,

fixed trim down and for variable trim up or down.

In addition to trimming information, the web site and

the Applications Manual also include design tips,

applications circuits, EMC suggestions, thermal design

guidelines and PDF data sheets for all available Vicor

products.

Part #	V300A12T400BL
Description	CONVERTER MOD DC/DC 12V 400W
Category	CONVERTER
Availability	In Stock
Qty	1

V300A12T400BL

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