1.Wide range of input voltage 2.Strong protection function 3.High reliability, safety and credibility

DC48V20A High Frequency Switching Power Supply 

Model: AD4820

Introduction:

The 48V series high frequency switching power supply / telecom switching power supply, which is a high efficient, high performance and high reliable communication power supply. switching power supply specially designed for all kinds of communication and electronic equipments such as electronic program-controlled exchanger, microwave equipment, optical fiber communication equipment, etc. switching power supply adopts the most advanced international PWM technique and stable & reliable circuit topological structure. The switching power supply has many good points, including small volume, light weight, high efficiency, wide working temperature range, strong capacity of resisting disturbance, strong electric fence adaptive faculty, fast dynamic response, high stability, low noise and ripple, strong protection function, etc.

The 48V series high frequency switching power supply / telecom switching power supply still should be applied to NC machine tool, data processing and other equipments; they also can be used as the charge/discharge equipment of storage battery and automatically implement the protection to the storage battery.

The AD4820 is with N+1 combination of modules structure, which can be used in parallel.

Features:

N+1 combination of modules structureWide range of input voltageContinuously adjustable DC output voltageHigh precision of voltage stabilizingLow output noise rippleWith Intelligent fanStrong protection (Limiting protection of output power; Overcurrent and shortcircuit protection; Input overvoltage and low-voltage protection; Input overvoltage and low-voltage protection; Overtemperature protection)

Technical Parameter:

Technical Index		Performance Parameter	Test Conditions
Input Voltage (optional)	AC	220Vac / 160V-290V	Output half load
	DC	220Vdc / 180V-280V	Output half load
Module Start up Surge		<12A	Output half load
Module Input Current		5.7A	Output half load
Output Floating Charge Voltage		53.5V	Factory settings
Modules Equalized Charge Voltage		56.5V	Factory settings
Output Voltage Range		48V: 40-59VDC (adjustable)	If locking 59.0V overvoltage protection, need to restart
Output Current		20A	Output Current-limiting (101%-105%)
Power Grid Regulation		±0.1%max	Output from no-load to full load
Modules Load Regulation		±0.5%max	Output from no-load to full load
Dynamic Response		100usmax	20%~100% load
Output Phone Weighted Noise		<2mV	Noise meter
Output Peak Noise		≤200mV	0~20MHz
Efficiency		>88%
Working Frequency		160KHz
Start up Delay Time		≤5S
Equalized-current Deviation		<5%	<1.25A
Temperature Coefficien		0.02%°C
Working Temperature		-10°C~+45°C	Radiator will shut off when temperature is  over 85°C, and which can restore.
Storage Temperature		-40°C~+85°C
Working Humidity		5%~95%RH	Non-condensing
Insulation Strength		Leakage Current <10mA,1min	I    Input —output       1500 Vac Input—Shell(Ground) 1500 Vac Output—Shell(Ground) 500Vac
Insulation Resistance		>10MΩ	DC: 1000V
Weight		8kg	Net Weight
Dimension (W×H×D)		483mm×88mm×325mm	Rack-mounted (19inch, 2U )

48V20A Switching Power Supply

Verified Information This information is Verified by Bureau Veritas and validity period is 2012/06/28 --- 2013/06/28 All the information below may covers both Gold Supplier and its related companies , Their Relationship will be affirmed according to china laws and regulations , also it will be clearly display in the full report >> Production Capacity: Product line name Production Line Capacity Actual Units Produced(Previous Year)

Communication Power Supply	Communication Power Supply: 100,000pcs	Communication Power Supply: 45,000pcs

Export Market Distribution: Market Revenue(Previous Year) Total Revenue (%)

Domestic Market	confidential	81.27
North America	confidential	0.38
South America	confidential	0.08
Eastern Europe	confidential	0.51
Southeast Asia	confidential	0.38
Oceania	confidential	1.54
Eastern Asia	confidential	15.38
Western Europe	confidential	0.23
Northern Europe	confidential	0.23

Production Machinery: Machine Name Brand & Model No. Quantity Number of Year(s) Used Condition

Four-Point Welding Machine	PW500J	2	5.0	Acceptable
Electric Oven	101-4	4	8.0	Acceptable
Pressure Needle Machine	TD1500	5	6.0	Acceptable
ABB Robot	ZRCS	1	3.0	Acceptable

Testing Machinery: Machine Name Brand & Model No. Quantity Number of Year(s) Used Condition

Digital Power Meter	YOKOGAWA/2531	9	8.0	Acceptable
Dual Trace Oscilloscope	2215 60MHZ , 2215 20MHZ	18	6.0	Acceptable
Leakage Current Tester	3182, 3185	5	6.0	Acceptable

Production Flow: 1.Four-point welding 2.Proofreading focal length 3.Xenon bulb aging 4.Color temperature inspection 5.HID finished product inspection 6.Packaging production line Certification: Certified Picture Certification Name Certified By Certificate No. Product Name & Model No. Available Date-Expired Date

	ISO9001:2008	WIT Assessment	15/09Q6534R31	Design and Manufacture of DA Inverter Power Supply Series, DAXDKE HID Power Series, DAX HID Power Series, AD and DD High-Frequency Switching Power Supply Series, etc	2009/12/04 --- 2012/12/03

Testing Report: Report Picture Report Name Report By Product Name & Model No. Report Date

	Test Report	Guangdong Meizhou Quality Supervision and Testing	Xenon Lamp Power Supply & DAXDKE-35P9D	2012/06/04