FF type 20W series

• Compact size and lightweight.

• High reliability and low price.

• Wide input voltage range.

• High conversion efficiency and low operating temperature rise.

• Built-in filter circuit, minimizing external radiated interference.

• Basic protection circuitry, providing good environmental adaptability.

• 4-hour, 100% full load aging and full-series functional testing.

Features
Model
Parameters

SFFD-

020-1E

SFFD-

020-1G

SFFD-

020-1F

SFFD-

020-1A

SFFD-

020-1H

SFFD-

020-1K

SFFD-

020-1I

SFFD-

020-1B

SFFD-

020-1J

SFFD-

020-1C

Rated Output Voltage

DC 3V

DC 5V

DC 7.5V

DC 10V

DC 12V

DC 15V

DC 18V

DC 24V

DC 36V

DC 48V

Output Interface Location

The five 5.0-M4 connectors are labeled DC+ and DC-.

Output Voltage Range

Setting error: ±2%; Adjustable range: ±10%

Rated Output Current

0～6A

0～4A

0～3A

0～2.2A

0～2A

0～1.4A

0～1.2A

0～1A

0～0.6A

0～0.5A

Output Voltage Ripple

Vnor<0.1%Uout ；Vp-p100Hz<0.5%Uout；Vp-pmax<1%Uout

Li;Lo Regulation

Line:±0.5%；LoAD:±0.5%

Overall Voltage Regulation Accuracy

±1%

Rated Output Power

≈18W

≈20W

≈22W

≈22W

≈24W

≈22W

≈22W

≈24W

≈24W

≈24W

Rated Operating Efficiency

≈72%

≈75%

≈76%

≈78%

≈79%

≈79%

≈81%

≈82%

≈83%

≈86%

Rated Input Voltage

Rated voltage: AC85～265V or DC120～380V; Operating voltage: AC76～280V. Interface position: Five-pin 5.0-M4 interface, labeled AC-L, AC-N, FG.

Rated Input Current

Rated current: AC130mA (AC220V) / AC260mA (AC110V), current range AC100mA～300mA

AC Input Frequency

Rated AC voltage frequency range 47～63Hz, sine wave

Inrush Current

The surge current on the power grid at the moment of power-on: the maximum value during cold start is 20A/10ms.

Input Overvoltage Protection

        Input allowable range: AC0～280V; Overvoltage protection point: AC300V±5V, power supply enters irreversible shutdown state.

Output Overload Protection

The overload protection point is approximately 120% of the rated output power; the overload protection is a power-limiting voltage-dropping method; the short-circuit protection is an output power-limiting method.

Output Overvoltage Protection

------

Overheat protection

The protection point is set when the casing temperature is above +85℃±3℃; the automatic recovery setting is when the casing temperature is below +65℃±3℃; the overheat protection is a voltage drop mode.

Multi-unit series/parallel operation

Multiple power supplies of the same series are allowed to be used in series or in parallel (parallel use may result in uneven current distribution).

Power supply timing parameters

Setup time ≈ 200ms; Settlement time ≈ 50ms; Hold-up time ≈ 20ms

Isolation voltage parameters

[Input-Output: AC1.5KV, Input-Casing: AC1.5KV, Output-Casing: AC0.5KV] 50Hz, Power-on for 1 minute: Leakage current <5mA

Operating temperature parameters

The operating temperature drift coefficient is approximately ±0.05 [%/℃]; the absolute temperature rise coefficient is approximately 1.0 [℃/W]; the absolute temperature rise of the chassis when operating at rated power is 25℃±5℃.

Environmental conditions parameters

Storage environment: -20℃ to +85℃; 10% to 95%RH. Operating environment: -10℃ to +50℃; 20% to 90%RH. (Varies depending on the operating environment and power consumption)

Cooling method

Continuous operation mode, with natural cooling of the machine body (power consumption is affected by differences in the operating environment and installation location).

External dimensions and mounting dimensions

Specifications: L88×W70×H32mm3; Maximum size: L90×W85×H32mm3; Installation dimensions: Bottom L78×W75mm2, Side L78×W0mm2

Net weight and color

Total weight 180g; bottom shell is 1.5mm thick aluminum with a sandblasted black finish; top shell is 0.7mm thick iron with an electroplated black finish.

Design standards

National Standards GB-4943 and GB-9254

Note: 1) All the above test indicators were measured under the following conditions: within the rated input voltage and rated output load range, the environment was 25℃, 85%RH, and there was no wind.

2) Output DC voltage ripple test: A parallel stranded wire with a length of 30cm and a cross-section of 1mm², with 0.1μF and 0.47μF capacitors connected to one end, was bypassed at the test point. The maximum peak-to-peak value of the main frequency ripple Vp-p100Hz and the maximum peak-to-peak value of the combined ripple Vp-pmax were measured respectively.

3) Li voltage regulation rate: When the load is at the rated value, the input voltage varies within the rated range; Lo load regulation rate: When the input is at the rated voltage value, the load varies from zero to the rated value.