MicroVerter® Series

High Reliability/COTS DC/DC Converters

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

	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. UV48-12-STCRL)

UV48 series

Input Specifications

Input Voltage (+In to -In), (Note 1)	48VDC ± 12VDC, 72VDC max.
Brownout	32VDC min. (75% fulll output)
In Rush Charge	2.6 x 10-4 Coulombs typ.
Input Reflected Ripple	20% typ. (full load, nominal line)
No Load Power Dissipation	2.5 watts
Logic Disabled Power In	1 watt
Input Ripple Rejection	60dB @120Hz, typ.
Input Overvoltage	72VDC min., 100VDC max. (no damage to units)

General Specifications

Environmental Specifications

Operating Temperature	-40°C to +100°C
Thermal Resistance Case to Ambient	4.2/°Cw typ.(single @ Tc=100°C)

Output Specifications

Output Voltage	See Selection Chart Above
Watts	252 Watts
Set Point Accuracy	±1% max. (no load)
Load Regulation	0.02% typ., 0.2% max (0 to Full Load)
Line Regulation	0.02% typ., 0.2% max. (Over Range)
Ripple	1% typ., 3% max. p-p (0 to 20MHz)
Output Power	See Selection Chart Above
Current Limit (auto. recovery)	110-120% typ. (full load)
Current Sharing (automatic)	±5% typ. (full load)
Transient Response Singles	50µs typ. (20-80% load, .5A/µs, Vout 1%)
Transient Response Main Output Triples	200µs min. (10-20A, aux. loads 2.5A, .25A/µs, Vout 1%)
Transient Response Waveforms	See Website: www.roassoc.com
Temp Drift	.02%/°C max.
Trim Range	±10% min. (consult factory for extended range)
Remote Sense Compensation	0.5V total
Over voltage Protection (Non-Shutdown, Auto Recovery)	120% min. (or Vout +5V whichever is greater)
Over Temperature Shut-Down	105°C ± 5°C (Case Temperature)
Turn-On Time	2.5 msec, typ. (input power applied, Vout 1%)
Enable Current (Logic Off)	1.0 mA typ. (sink)
Turn-On Time	1.0 msec, max. (Vout within 1%)

Physical Specifications