Delta Electronics Series S48SA, 33W Family manual Technical Specifications, Parameter

TECHNICAL SPECIFICATIONS

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

PARAMETER	NOTES and CONDITIONS		S48SA1R812NRFA
		Min.		Typ.	Max.	Units
ABSOLUTE MAXIMUM RATINGS
Input Voltage
Continuous					80	Vdc
Transient (100ms)	100ms				100	Vdc
Operating Temperature	Refer to Figure 18 for 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		32.5		34	35.5	V
Turn-Off Voltage Threshold		30.5		32	33.5	V
Lockout Hysteresis Voltage		1		2	3	V
Maximum Input Current	100% Load, 36Vin				0.85	A
No-Load Input Current				30		mA
Off Converter Input Current				7		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			50		dB
OUTPUT CHARACTERISTICS
Output Voltage Set Point	Vin=48V, Io=50%Io.max, Ta=25℃	1.77		1.80	1.83	V
Output Voltage Regulation
Over Load	Io=Io,min to Io,max			±2	±10	mV
Over Line	Vin=36V to75V			±2	±5	mV
Over Temperature	Ta=-40C to 85C			100	300	ppm/℃
Total Output Voltage Range	Over sample load, line and temperature	1.73			1.87	V
Output Voltage Ripple and Noise	5Hz to 20MHz bandwidth
Peak-to-Peak	Full Load, 1µF ceramic, 10µF tantalum			30	75	mV
RMS	Full Load, 1µF ceramic, 10µF tantalum			5	20	mV
Operating Output Current Range		0			12	A
Output DC Current-Limit Inception	Output Voltage 10% Low	13.2		15.6	18	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			35	100	mV
Negative Step Change in Output Current	75% Io,max to 50% Io.max			35	100	mV
Settling Time to 1% of Final value				200		µs
Turn-On Transient
Start-Up Time, From On/Off Control				6	12	ms
Start-Up Time, From Input				6	12	ms
Maximum Output Capacitance	Full load; 5% overshoot of Vout at startup				2200	µF
EFFICIENCY
100% Load		86		88		%
ISOLATION CHARACTERISTICS
Isolation Voltage		1500				V
Isolation Resistance		10				MΩ
Isolation Capacitance				1500		pF
FEATURE CHARACTERISTICS
Switching Frequency				330		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	uA
Output Voltage Trim Range	Across Trim Pin & +Vo or –Vo, Pout≦max rated	-10			+10	%
Output Over-Voltage Protection(Hiccup)	Over full temp range; % of nominal Vout	115		125	140	%
GENERAL SPECIFICATIONS
MTBF	Io=80% of Io, max; Tc=40°C			6.29		M hours
Weight				18		grams
Over-Temperature Shutdown	Refer to Figure 18 for measuring point			115		°C

DS_S48SA1R812_06012006

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