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UV28T 28 Watt Power Converters

MicroVerter® Series

High Reliability/COTS DC/DC Converters

	Miniature Size
	High Density- Up to 58 W/in.3
	Constant Frequency- 370 kHz
	Parallelable with Current Sharing
	Fault Tolerant - n+m Redundancy
	Non-Shutdown OVP
	Extremely Low Thermal Resistance

Model Number	Output Voltage	Output Amps
UV28-T512	5 Volts / 12 Volts / -12 Volts (DC)	35 Amps* / 3 Amps* / 3 Amps*
UV28-T515	5 Volts / 15 Volts / -15 Volts (DC)	35 Amps* / 3 Amps* / 3 Amps*

*Maximum Total Output Power 185 Watts

	Multiple Configurations Available
S=	Synchronization 330-400KHz
T=	-55°C to 100°C Operating Temperature
C=	Conformal Coating
E=	-55°C to 125°C Operating Temperature (Consult tech@astrodyne.com for output power rating)
RL=	No Pure Tin
LF=	RoHS Compliant
	(ex. UV28-T515-STCRL)

UV28 Triple series

Input Specifications

Input Voltage (+In to -In)	28VDC ± 8VDC, 32VDC max.
Brownout	18VDC min. (75% full output)
In Rush Charge	2.6 x 10-4 Coulombs typ.
Input Reflected Ripple	20% typ. (full load, nominal line singles)
No Load Power Dissipation	7.5 watts typ.
Logic Disabled Power In	.35 watts typ.
Input Ripple Rejection	60dB @120Hz, typ.
Input Overvoltage	32VDC min, 60VDC max. (no damage to units)

General Specifications

Input/Output Isolation	1000VDC, min. (consult factory for procedure)
Input/Baseplat Isolation	1000VDC, min.
Output/Baseplate Isolation	200VDC, min.
Input-to-Output Capacitance	2200pF typ.

Environmental Specifications

Operating Temperature	-40°C to +100°C
Thermal Resistance Case to Ambient	3.3°C/w typ. (triple @ Tc=100°C )

Output Specifications

Watts	252 watts
Output Voltage	See Selection Chart Above
Set Point Accuracy	±0.5% typ., ±1% max.(10A on main, no load auxiliaries)
Load Regulation	0.2% typ., 0.5% max (0 to Full Load)
Line Regulation	0.01% typ., 0.1% max. (Over Range)
Ripple	.25 typ., 0.5% max. p-p (0 to 20 mHz)
Output Power	See Selection Chart Above
Current Limit (auto. recovery)	110-120% typ. (full load)
Transient Response	200µs typ. (20-80% load, Vout within 1%), 200µs typ. (low line to high line, Vout 1%), 200µs typ. (50-100% load, Vout 1%)
Temp Drift	.06%/°C typ.
Over Temperature Shut-Down	105°C ± 5°C (Case Temperature)
Turn-On Time	2.5 msec, typ. (input power aplied, Vout 1%)
Enable Current (Logic Off)*	1.0 mA, typ. (sink)
Turn-On Time*	1 msec, typ. (Vout within 1%)

Physical Specifications

Size (mm)	1.3 x 6.1 x 11.7 mm
Size (Inches)	0.5”x 2.4”x 4.6”
Weight (g)	255.1 g
Weight (oz)	9 oz