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Analog Devices LT3799EMSE-1 | Demoboard DC1947A
LT3799EMSE-1 Demo Board u Offline Isolated Flyback LED Driver with PFC
Overview
| Topology | Flyback Converter |
| Input voltage | 90-277 V |
| Output 1 | 48 V / 1 A |
| IC revision | 2 |
Description
Demonstration circuit 1947A is an off-line isolated flyback LED driver featuring LTC®3799-1 . The demo board provides a single constant current output of 1A over an LED string voltage from 30V to 50V. It is optimized to operate over a wide AC input voltage range (90VAC to 277VAC, 47Hz to63Hz). It provides a high power factor (>0.9) enabling a single design to be used worldwide. It is also designed to comply with the IEC 61000-3-2 Class C harmonics standard and the EN55015B conducted EMI standard.
The LT3799-1 controls an isolated flyback converter in boundary mode. Its novel current sensing scheme delivers a well-regulated output current to the secondary side without using an opto-coupler. Open- and shorted-LEDprotection ensures long term reliability.
The LT3799-1 is available in a low profile, thermallyenhanced 16-lead MSOP package.
The LT3799-1 data sheet gives a complete description of the device, operation and application information. The data sheet must be read in conjunction with this quick start guide for demo circuit 1947A.
Features
Remarks:L1=1mH L2=27mH And Transformer T1 UsedRefer page no.7
More information
Products
Order Code | Datasheet | Simulation | Downloads | Status | Product series | VIN | VOut1(V) | IOut1(A) | Vaux(V) | RDC 1(Ω) | RDC 2(Ω) | RDC 3(Ω) | RDC 4(Ω) | fswitch(kHz) | L(µH) | NPRI : NSEC : NAUX | ISAT(A) | VT(V (AC)) | L(mm) | W(mm) | H(mm) | Mount | Size | SamplesAvailability & Sample | ||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
 | SPECWE-OLLT Offline Flyback Transformers, 85 - 305 V (AC), 48 V | Availability – | Status Activei| Production is active. Expected lifetime: >10 years. | Product seriesWE-OLLT Offline Flyback Transformers | Input Voltage 85 - 305 V (AC) | Output Voltage 148 V | Output Current 11 A | Auxiliary Voltage24 V | DC Resistance 10.12 Ω | DC Resistance 20.1 Ω | DC Resistance 30.05 Ω | DC Resistance 40.05 Ω | Switching Frequency 60 | Inductance250 µH | Turns Ratio2:2:1:1:1 | Saturation Current4.5 A | Insulation Test Voltage4500 V (AC) | Length31 mm | Width31 mm | Height25 mm | MountTHT | SizeER28/14 | –Check availability |
| Expected Availability | Opening inventory | Quantity |
|---|---|---|
| Current Availability | – | – |