Delta Electronics F48SA Technical Specifications, Parameter, NOTES and CONDITIONS, Efficiency

TECHNICAL SPECIFICATIONS

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

PARAMETER	NOTES and CONDITIONS		F48SA28025 (Standard)
			Min.	Typ.	Max.		Units
ABSOLUTE MAXIMUM RATINGS
Input Voltage
Continuous					80		Vdc
Transient (100ms)	100ms				100		Vdc
Operating Temperature	Please refer to Fig 20 for measuring point		-40		95		°C
Storage Temperature			-55		125		°C
Input/Output Isolation Voltage					2250		Vdc
INPUT CHARACTERISTICS
Operating Input Voltage			36	48	75		Vdc
Input Under-Voltage Lockout
Turn-On Voltage Threshold			33	34.5	36		Vdc
Turn-Off Voltage Threshold			31	32.5	34		Vdc
Lockout Hysteresis Voltage				2			Vdc
Input Over-Voltage Lockout
Turn-On Voltage Threshold			76	78	80		Vdc
Turn-Off Voltage Threshold			78	80	82		Vdc
Lockout Hysteresis Voltage				2			Vdc
Maximum Input Current	100% Load, 36Vin				23		A
Inrush Current(I2t)					1		A2s
Input Reflected-Ripple Current	P-P thru 15µH inductor, 5Hz to 20MHz			20			mA
Input Voltage Ripple Rejection	120 Hz			50			dB
OUTPUT CHARACTERISTICS
Output Voltage Set Point	Vin=48V, Io=Io.max, Tc=25°C		27.44	28.00	28.56		Vdc
Output Voltage Regulation
Over Load	Io=Io,min to Io,max			28	56		mV
Over Line	Vin=36V to 75V			28	56		mV
Over Temperature	Tc=-40°C to 100°C			100	300		mV
Total Output Voltage Range	over all load, line and temperature		27.25	28.00	28.75		V
Output Voltage Ripple and Noise	5Hz to 20MHz bandwidth
Peak-to-Peak	Full Load, 1µF ceramic, 10µF Low ESR cap			200			mV
RMS	Full Load, 1µF ceramic, 10µF Low ESR cap			65			mV
Operating Output Current Range			2		25		A
Output DC Current-Limit Inception	Output Voltage 10% Low			120	150		%
DYNAMIC CHARACTERISTICS
	48V, Tested with a 10µF, a 1µF Ceramic cap and	a
Output Voltage Current Transient	470uF low ESR aluminum load cap,
	ΔIo/Δt=1A/µs
Positive Step Change in Output Current	50% Io.max to 75% Io.max			450			mV
Negative Step Change in Output Current	75% Io.max to 50% Io.max			450			mV
Settling Time (within 1% Vout nominal)				500			us
Turn-On Transient
Start-Up Time, From On/Off Control				20	35		ms
Start-Up Time, From Input				20	35		ms
Output Capacitive Load			470		6000		µF
EFFICIENCY
100% Load				91.5			%
60% Load				91.5		%
ISOLATION CHARACTERISTICS
Input to Output					2250		Vdc
Input to Case					1500		Vdc
Output to Case					1500		Vdc
Isolation Resistance			10				MΩ
Isolation Capacitance				1800			pF
FEATURE CHARACTERISTICS
Switching Frequency				300			kHz
Output overshoot Voltage during start up				0
Power good pin max applied voltage	Max sink current 5mA				35		V
Auxiliary output voltage	Aux pin source current <=20mA		7	10	13		V
	Referenced to Sense(-) pin
Output Voltage Trim Range	Pout ≦ max rated power		-15		+10		%
Output Voltage Remote Sense Range	Pout ≦ max rated power				0.5		V
Output Over-Voltage Protection	Over full temp range; % of nominal Vout		115		140		%
GENERAL SPECIFICATIONS
MTBF	Io=80% of Io, max; Ta=25°C			1.14			M hours
Weight				168			grams
Over-Temperature Shutdown	Please refer to Fig.20 for measuring point			100			°C

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