VICOR FlatPAC Family AC, FlatPAC Family DC, FlatPAC Family U-Series, FlatPAC Series Application Notes

FlatPAC Family

50 to 600 Watt
AC-DC Switchers

Application Notes

Functional and Mechanical Layout

Installation and Operation Guidelines

Product Description

The FlatPAC family of user-definable offline power supplies provides a complete
power solution that incorporates one, two, or three standard Vicor DC-DC
converters and a front-end subassembly in a modular package. FlatPAC is available
with one, two, or three outputs and total output ratings of 50–600 W. These power
supplies feature an autoranging input, which automatically senses the input line
voltage and sets the power supply’s input range accordingly. FlatPAC’s unique
modular design accommodates over 10,000 different configurations.

FlatPAC power supplies that contain BatMod current source modules instead of
VI-200 converters are indicated by the suffix -BM following the FlatPAC part
number. BatMod converters provide a programmable output current, rather than a
regulated output voltage. Consequently, the output supervisory terminal functions
differ on FlatPACs with BatMod modules.

U-Series

Product is internally fused

Application Notes

MOD DIS Input. Apply a current of
1–30 mA to disable output. Forward
voltage drop of internal opto diode is

1.65 V max. at 30 mA max.

AC OK and BUS OK Status Outputs.

Outputs low when OK.
Vce sat. = < 0.4 V @ 1.5m A. Maximum
external pullup is 70 Vdc. AC OK and
BUS OK signals are isolated and can
have different reference levels.

V

+

r

AC OK

+

–

1.5mA
max.

V

+

r

BUS OK

+

–

30mA max.

Disable

MOD DIS

V

+

+

–

1.5mA
max.

FlatPAC

AC Mains and Supervisory Connections

External Supervisory Functions (2-up and 3-up models only)

MOD DIS –
MOD DIS +
AC OK –
AC OK +
BUS OK –
BUS OK +

Internal
Supervisory
Circuits
(Optocouplers)

AC Mains

Earth Ground

L1

L2/N

GND

2-Up

and

3-Up

1-Up

2

3

+Sense and –Sense must be connected locally or remotely (shown).

RESISTOR VALUES FOR TRIMMING STANDARD OUTPUT VOLTAGES

Nominal

5 V 12 V 15 V 24 V 28 V 48 V Trim Range

Output Voltage

R1(KΩ) .953 15.8 22.1 41.2 48.7 90.9 +10%, -10%

R2(KΩ) 90 90 90 90 90 90 +10%, -10%

V

LINE

> 90 (180)Vac

AC Line

Interrupted

AC

Line

AC OK

BUS OK

T0

T1 T2

T3

T4

Conditions: Full Load 90 (180)Vac, AC Line

Timing Diagram—Status Signals (2-up and 3-up models only)

Output Sense and Trim (All models with VI-200s)

Load

+

–

Battery

Charger

External
Control
Functions

Programmable Current

or Voltage Source

12–48V
Battery

+

–

+Out

V

TRIM

I

TRIM

I

MON

–Out

External
Control
Functions

+Out

V

TRIM

I

TRIM

I

MON

–Out

Typical Applications (Models with BatMods only)

Time Interval Min Typ Max Units Notes

T1-T0 0 0.1 1.0 ms

T3-T2 0 – – ms Ride-through time

T4-T2 5 – – ms Hold-up time

T4-T3 5 – – ms AC fail warning time

+Out

+Sense

Trim

–Sense

–Out

R2

R1

10K

+ V

V

OUT

OUT

RTN