VICOR AC-DC, F-Series, A-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 up to 600 W. The two-up and
three-up models (maximum output 400 W and 600 W) 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 switchers 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 controlled
output voltage. Consequently, the output supervisory terminal functions differ on
FlatPACs with BatMod modules.
F-Series
(Strappable Input)
A-Series
(Autoranging Input)
12
Application Notes
2
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. @
30 mA max.
AC-OK and BUS-OK Status Outputs. Output transistors saturated
if OK. Vce sat. = < 0.4 V @ 1.5 mA. Maximum voltage is 70 Vdc.
30 mA max.
Disable
MOD DIS +
MOD DIS –
V
+
AC OK –
AC OK +
BUS OK –
Status
1.5mA max.
V
+
r
r
AC Mains Connections
Supervisory Connections (2-up and 3-up models)
AC Mains
Earth Ground
MOD DIS –
MOD DIS +
AC OK –
AC OK +
BUS OK –
BUS OK +
Internal
Supervisory
Circuits
(Optocouplers)
Autoranging models:
Do not connect
Manual strap models:
Connect for 115 Vac
Open for 230 Vac
ST2
ST1
L2/N
L1
GND
3
+Sense and –Sense must be connected locally or remotely (shown).
+ V
OUT
To Load
– V
OUT
R1
10K
R2
+ OUT
+ SENSE
TRIM
– SENSE
– OUT
RESISTOR VALUES FOR TRIMMING STANDARD OUTPUT VOLTAGES
Nominal Output Voltage 5 V 12 V 15 V 24 V 28 V 48 V Trim Range
R1(kΩ) .953 15.8 22.1 41.2 48.7 90.9
R2(kΩ)909090909090
+10%, -10%
V
LINE
> 90 (180) Vac
AC Line
Interrupted
AC
Line
AC OK
DC OK
T0
T1 T2
T3
T4
Conditions: Full Load 90 (180) Vac, AC Line
Timing Diagram—Status Signals (2-up and 3-up models)
Output Trimming (All models with VI-200s)
Battery
Charger
External
Control
Functions
+ OUT
V
TRIM
I
TRIM
I
MON
– OUT
Programmable
Current Source
12–48V
Battery
+
–
➧
➧
Load
+
–
OR
Typical Applications (FlatPACs with BatMods only)
Time Interval Min Typ Max Units Notes
T1-T0 0 0.1 1.0 ms
T3-T2 0 – – ms
T4-T2 5 – – ms Ride-through time
T4-T3 5 – – ms AC fail warning time
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