Delta Electronics Series S48SS Technical Specifications, Parameter, NOTES and CONDITIONS, Units

TECHNICAL SPECIFICATIONS

(TA=25°C, airflow rate=300 LFM, Vin=48Vdc, nominal Vout unless otherwise noted.)

PARAMETER	NOTES and CONDITIONS		S48SS12001NRFA
		Min.		Typ.	Max.	Units
ABSOLUTE MAXIMUM RATINGS
Input Voltage
Continuous					80	Vdc
Transient (100ms)	100ms				100	Vdc
Operating Temperature	Refer to Figure 12 for the measuring point	-40			100	°C
Storage Temperature		-55			125	°C
Input/Output Isolation Voltage	1 minute	1500				Vdc
INPUT CHARACTERISTICS
Operating Input Voltage		36		48	75	V
Input Under-Voltage Lockout
Turn-On Voltage Threshold		33.8		34.5	35.8	V
Turn-Off Voltage Threshold		32.0		33.5	34.5	V
Lockout Hysteresis Voltage		0.5		1.5	2.5	V
Maximum Input Current	100% Load, 36Vin				0.6	A
No-Load Input Current				25		mA
Off Converter Input Current				1		mA
Inrush Current(I2t)				0.01		A2s
Input Reflected-Ripple Current	P-P thru 12µH inductor, 5Hz to 20MHz			5		mA
Input Voltage Ripple Rejection	120 Hz			55		dB
OUTPUT CHARACTERISTICS
Output Voltage Set Point	Vin=48V, Io=50% Io, max, Tc=25℃	11.76		12.00	12.24	V
Output Voltage Regulation
Over Load	Io=Io,min to Io,max			±12	±60	mV
Over Line	Vin=36V to 75V			±12	±36	mV
Over Temperature	Tc=-40℃to 100℃			100	300	ppm/℃
Total Output Voltage Range	Over sample load, line and temperature	TBD			TBD	V
Output Voltage Ripple and Noise	5Hz to 20MHz bandwidth
Peak-to-Peak	Full Load, 1µF ceramic, 10µF tantalum			50	100	mV
RMS	Full Load, 1µF ceramic, 10µF tantalum			15	25	mV
Operating Output Current Range		0			1.25	A
Output DC Current-Limit Inception	Output Voltage 10% Low	1.5		2	2.5	A
DYNAMIC CHARACTERISTICS
Output Voltage Current Transient	48V, 10µF Tan & 1µF Ceramic load cap, 0.1A/µs
Positive Step Change in Output Current	50% Io, max to 75% Io, max			100	240	mV
Negative Step Change in Output Current	75% Io, max to 50% Io, max			100	240	mV
Setting Time to 1% of Final Value				600		µs
Turn-On Transient
Start-Up Time, From On/Off Control				35	50	ms
Start-Up Time, From Input				35	50	ms
Maximum Output Capacitance	Full load; 5% overshoot of Vout at startup				47	µF
EFFICIENCY
100% Load		84		86.5		%
ISOLATION CHARACTERISTICS
Isolation Voltage		1500				V
Isolation Resistance		100				MΩ
Isolation Capacitance				500		pF
FEATURE CHARACTERISTICS
Switching Frequency				260		kHz
ON/OFF Control, (Logic Low-Module ON)
Logic Low	Von/off at Ion/off=1.0mA	0			0.8	V
Logic High	Von/off at Ion/off=0.0 µA				15	V
ON/OFF Current	Ion/off at Von/off=0.0V				1	mA
Leakage Current	Logic High, Von/off=15V				50	µA
Output Voltage Trim Range	Across Trim Pin & +Vo or -Vo, Pout≦max rated power	-10			+10	%
Output Over-Voltage Protection	Over full temp range; % of nominal Vout	115		125	140	%
GENERAL SPECIFICATIONS
Calculated MTBF	Io=80% of Io, max; Tc=40°C			3		M hours
Weight				12.5		grams

2

DS_s48SS12001_06082006