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LRS-75W Switching Power Supply
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Product: Views:412LRS-75W Switching Power Supply 
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Delivery date: Since the payment date Days delivery
Valid until: Long-term effective
Last updated: 2019-05-15 03:30
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Details

LRS-75W Series Ultra Thin Single Switching Power Supply


Model

LRS-75-5

LRS-75-12

LRS-75-15

LRS-75-24

LRS-75-36

LRS-75-48

Output

DC voltage

5V

12V

15V

24V

36V

48V

Rated current

14A

6A

5A

3. 2A

2. 1A

1. 6A

Current range

0~14A

0~6A

0~5A

0~3. 2A

0~2. 1A

0~1. 6A

Rated power

70W

72W

75W

76. 8W

75. 6W

76. 8W

Ripple & noise

100mVp-p

120mVp-p

120mVp-p

150mVp-p

200mVp-p

200mVp-p

DC voltage ADJ. range

±10%

±10%

±10%

±10%

±10%

±10%

Voltage tolerance Note. 3

±3%

±2%

±1%

±1%

±1%

±1%

Line regulation Note. 4

±0. 5%

±0. 5%

±0. 5%

±0. 5%

±0. 5%

±0. 5%

Load regulation Note. 5

±2%

±1%

±0. 5%

±0. 5%

±0. 5%

±0. 5%

Setup, rise, hold up time

800ms, 30ms, 30ms/ 230VAC (full load)

Input

Voltage range

90~264VAC, 127~373VDC

Frequency range

47~63HZ

AC current

1. 4A/ 115VAC 0. 85A/ 230VAC

Inrush current

Cold start 45A/ 230VAC

Efficiency

86%

88%

89%

90%

91%

91%

Leakage current

<0. 75mA/ 240VAC

Protection

Overload

Rated output power 110%~150% start over load protection

Protection type: hiccup mode, auto-recovery after fault condition is removed

Over voltage

Rated output voltage 115%~135% Start over voltage protection

Protection type: hiccup mode,auto-recovery after fault condition is removed

Environment

Working temp, humidity

-30℃~+70℃ (Please refer to"derating curve")

20%~90% RH Non-condensing

Storage temp, humidity

-40℃~+85℃, 10%~95% RH non-condensing

Withstand vibration

10~500HZ, 2G 10min/ 1cycle, period for 60 minutes, each axes

Safety

Withstand voltage

I/P-O/P: 1. 5KVAC I/P-FG: 1. 5KVAC O/P-FG: 0. 5KVAC

Isolation resistance

I/P-O/P, I/P-FG, O/P-FG: 100M ohms/ 500VDC

Fit standard

Safety standards

Compliance to UL60950-1, TUV EN60950-1, GB4943

EMC emission

Compliance to EN55022 (CISPR22) Class A, GB9254 Class B, EN55014, EN61000-3-2, 3

EMC immunity

Compliance to EN61000-4-2, 3, 4, 5, 6, 8, 11, EN55024, EN61000-6-1

Others

Dimension

99*97*30mm (L*W*H)

Weight / packing

0. 25kg/ 45pcs/ 12. 3kg/ 0. 023m³/ 0. 82CUFT

MTBF

≥660K hrs min. MIL-HDBK-217F (25℃)

Note

1. All parameters NOT specially mentioned are measured at 230VAC input, rated load and 25℃ of ambient temperature.
2. Ripple & noise are measured at 20MHz of bandwidth by using a 12" twisted pair-wire terminated with a 0. 1uf & 47uf parallel capacitor.
3. Tolerance : includes set up tolerance, line regulation and load regulation.



By circuit structure


(1) voltage step-down mode of resistance and capacitor: when using the capacitor, the instantaneous current through LED is extremely large due to the charging and discharging effect, which is easy to damage the chip. Vulnerable to power grid voltage fluctuations, low efficiency and reliability of power supply.


(2) resistance voltage step-down: it is not easy to make voltage stabilizing power supply due to the large interference caused by the voltage change of the power grid. The step-down resistance consumes a large part of energy, so the power efficiency of this power supply mode is very low, and the reliability of the system is also low.


(3) conventional transformer step-down mode: the power supply is small in size, heavy in weight, and low in power efficiency, generally only 45% ~ 60%, so it is rarely used and has low reliability.


(4) step-down mode of electronic transformer: the power supply efficiency is low, the voltage range is not wide, generally 180 ~ 240V, ripple interference is large.


(5) RCC step-down switching power supply: wide voltage range, high power efficiency, generally can achieve 70% ~ 80%, wide application. As the oscillation frequency of this control mode is discontinuous, the switching frequency is not easy to control, the ripple coefficient of load voltage is relatively large, and the adaptability of abnormal load is poor.


(6) PWM control mode switching power supply: it is mainly composed of four parts: input rectification and filtering part, output rectification and filtering part, PWM voltage stabilizing control part, and switching energy conversion part. The basic working principle of PWM switching voltage stabilizer is changes in input voltage, the parameters of internal and external load, the control circuit by the control signal and reference signal difference of closed loop feedback, adjust the main circuit switching device turn-on, the pulse width of the makes switch power supply output voltage or current stability (i.e., the corresponding regulated power supply and constant current power supply). High efficiency of power supply, generally 80% ~ 90%, stable output voltage and current. Generally this kind of circuit has perfect protection measures, belongs to the high reliability power supply.


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