Series AC3

Power Factor Corrected
Three-Phase AC Input: 208 VAC +/-20%
47 - 440 Hz Input Frequency
Hi Reliability Isolated Regulated
Fixed Operating Frequency: 100Khz
AC-DC Converter to 300 Watts

 

3 Phase Input Delta-Connection.
Meets all specifications even with loss of one phase.

3 Phase Input Voltage: 208 VAC +/-20% (line to line), no neutral connection.
Power Factor Corrected: 0.95 typical (50 - 100% Full Load) at 60Hz; 0.92 typical (50 - 100% Full Load) at 400Hz
Space Saving Design: One module replaces two
Special Output Voltages Available
Regulated Output Voltage
Made in the USA, Fully Encapsulated

For 360 to 800Hz Input Frequency - Consult Factory at 800-431-1064

 

TYPICAL FEATURES/ELECTRICAL CHARACTERISTICS:

AC Line Input Voltage: Three-Phase, 208 VAC +/-20% 47-440 Hz
Output Power: 150 to 300 watts, see chart

Output Voltage Ripple: 75-500 mV, See chart

Operating Temperature: 0 to 85º C, case temperature. See application notes for proper thermal considerations. Availabe 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: 2121 VDC
    From AC Input to Auxiliary 380 VDC Output: Non-Isolated
Capacitor Requirement: External at Auxiliary 380 VDC Pins: 220uf, 450 Volt Electrolytic * MUST BE INSTALLED
Current Limit Setpoint: 130 % of full load rating (Typical)
Operating Frequency: 100Khz: Fixed

 

 

For Output Voltages of up to and including 48V

Weight: 340 Grams Typical
All dimensions are in Inches
NOTE: The torque for mounting screws must be 6 to 9 In-Lbs.
PIN No. FUNCTION
1 AC IN
2 AC IN
3 AC IN
4 +380 V BUS
5 -V BUS
6 -V OUT
7 +V OUT
8 -SENSE
9 + SENSE

NOTE: Pins 8 and 9 are for models with output voltages up to and including 48 Volts. They are not on the higher voltage models (Those greater than 48 Volts)

For Output Voltages over 48V

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

 

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
Regulation
(±%)*
Price
(US $)
AC3-5S
5
30
150
76
100
1.0
1.5
0.2
347.22
AC3-9S
9
27.8
250
78
100
1.0
1.5
0.2
347.22
AC3-12S
12
25
300
80
150
0.5
1.5
0.2
347.22
AC3-15S
15
20
300
80
150
0.5
1.5
0.2
347.22
AC3-24S
24
12.5
300
81
250
0.5
1
0.2
347.22
AC3-28S
28
10.71
300
82
300
0.5
1
0.2
347.22
AC3-48S
48
6.25
300
82
500
0.5
1
0.2
382.53
AC3-100S
100
2.50
250
85
250
1.0
1
0.2
473.16
AC3-125S
125
2.00
250
85
250
1.0
1
0.2
473.16
AC3-150S
150
1.67
250
85
350
1.0
1
0.2
473.16

AC3-175S

175
1.43
250
85
350
1.0
1
0.2
473.16
AC3-200S
200
1.25
250
85
400
1.0
1
0.2
509.49
AC3-225S
225
1.11
250
85
400
1.0
1
0.2
509.49
AC3-250S
250
1.00
250
85
500
1.0
1
0.2
509.49
AC3-275S
275
0.91
250
85
500
1.0
1
0.2
509.49
AC3-300S
300
0.83
250
85
500
1.0
1
0.2
545.16

External Capacitor Required:  220µF, 450 V Aluminum Electrolytic Capacitor
*All specifications are typical at nominal (208 VAC, 60 Hz) three-phase 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
$24.00
TYPE CV
$24.00
TYPE TI
$3.00

 
 
 

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

AC3 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 AC3-24S 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 AC3-24S 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 AC3-24S module be used if 200 Watts of output power is required?

 

 

 

 

 

 

For output voltages up to and including 48V

Sense Pins must be connected
(see application note for remote sense)

For output voltages above 48V

Remote Sense Terminals (only on models with output voltages below and including 48V)

Remote Sense terminals must be connected for unit to operate properly. When conncected in local sense (+S connected to +V output terminal and -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 theis by compensating for up to 1V of drop in the load wires. This means that the output voltage of the unit will ge 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 AC3-12S 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

LOCAL SENSE CONNECTION

REMOTE SENSE CONNECTION

With local sense, Vout is regulated at 12V
So, Vout = 12V
Vload = Vout - Vwire1 - Vwire2
Vload = 12V - .2V - .2V = 11.8 Volts
With remot sense, Vload is regulated at 12V
So, Vload = 12V
Vout = Vload + Vwire1 + 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 10803-1810
Tel: 914-738-1400
Fax: 914-738-8225