Delta Electronics Q48SR manual Technical Specifications, Parameter

TECHNICAL SPECIFICATIONS

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

PARAMETER	NOTES and CONDITIONS		Q48SR1R840NR A
		Min.		Typ.	Max.	Units
ABSOLUTE MAXIMUM RATINGS
Input Voltage
Continuous					80	Vdc
Transient (100ms)	100ms				100	Vdc
Operating Temperature	Refer to Figure 24 for the measuring point	-40			114	°C
Storage Temperature		-55			125	°C
Input/Output Isolation Voltage	1 minute	1500				Vdc
INPUT CHARACTERISTICS
Operating Input Voltage		36		48	75	Vdc
Input Under-Voltage Lockout
Turn-On Voltage Threshold		33		34	35	Vdc
Turn-Off Voltage Threshold		31		32	33	Vdc
Lockout Hysteresis Voltage		1		2	3	Vdc
Maximum Input Current	100% Load, 36Vin				2.7	A
No-Load Input Current				50	100	mA
Off Converter Input Current				10	20	mA
Inrush Current(I2t)				0.03		A2S
Input Reflected-Ripple Current	P-P thru 12µH inductor, 5Hz to 20MHz			20		mA
Input Voltage Ripple Rejection	120 Hz			70		dB
OUTPUT CHARACTERISTICS
Output Voltage Set Point	Vin=48V, Io=Io.max, Ta=25C	1.75		1.8	1.85	Vdc
Output Voltage Regulation
Over Load	Io=Io,min to Io,max			±2	±5	mV
Over Line	Vin=36V to 75V			±2	±5	mV
Over Temperature	Ta=-40C to 85C			±30	±100	mV
Total Output Voltage Range	over sample load, line and temperature	1.69			1.91	V
Output Voltage Ripple and Noise	5Hz to 20MHz bandwidth
Peak-to-Peak	Full Load, 1µF ceramic, 10µF tantalum			20	100	mV
RMS	Full Load, 1µF ceramic, 10µF tantalum			10	20	mV
Operating Output Current Range		0			40	A
Output DC Current-Limit Inception	Output Voltage 10% Low	105			130	%
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			50	150	mV
Negative Step Change in Output Current	75% Io,max to 50% Io,max			50	150	mV
Settling Time (within 1% Vout nominal)				100		uS
Turn-On Transient
Start-Up Time, From On/Off Control				15	30	mS
Start-Up Time, From Input				15	30	mS
Maximum Output Capacitance	Full load; 5% overshoot of Vout at startup				20000	µF
EFFICIENCY
100% Load				87		%
60% Load				88.5		%
ISOLATION CHARACTERISTICS
Input to Output		1500				Vdc
Isolation Resistance		10				MΩ
Isolation Capacitance				2000		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	uA
Output Voltage Trim Range	Across Pins 9 & 5, Pout <= max rated power	0.8			1.9	V
Output Voltage Remote Sense Range	Pout <= max rated power				10	%
Output Over-Voltage Protection	Over full temp range; % of nominal Vout	115		130	145	%
GENERAL SPECIFICATIONS
MTBF	Io=80% of Io, max; Ta=25°C, airflow rate=300 LFM			2.3		M hours
Weight				32		grams
Over-Temperature Shutdown	Refer to Figure 24 for the measuring point			125		°C

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