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Analog Devices LT3799-1 franjic rev | Demoboard DC1816A
LT3799-1 Offline Isolated Flyback LED Driver with PFC
Overview
| Topology | Flyback Converter |
| Input voltage | 90-305 V |
| Output 1 | 36 V / 3 A |
| IC revision | B |
Description
Demonstration circuit 1816A is an off-line isolated flyback LED driver featuring LT®3799-1. The demo board provides a single constant current output of 3A over an LED string voltage from 22V to 38V. It is optimized to operate over a wide AC input voltage range (90VAC to 305VAC, 47Hzto 63Hz). LED current typically stays within ±5% over the whole input voltage range. 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 ClassC 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 1816A.
Features
Remarks:L1=10mH L2=10mH L3=150uHAnd 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) | fswitch(kHz) | NPRI : NSEC : NAUX | ISAT(A) | VT(V (AC)) | L(mm) | W(mm) | H(mm) | Mount | Size | L(µH) | IR(A) | RDC max.(Ω) | SamplesAvailability & Sample | ||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
 | SPECWE-OLLT Offline Flyback Transformers, 85 - 265 V (AC), 36 V | Availability – | Status Activei| Production is active. Expected lifetime: >10 years. | Product seriesWE-OLLT Offline Flyback Transformers | Input Voltage 85 - 265 V (AC) | Output Voltage 136 V | Output Current 13 A | Auxiliary Voltage25 V | DC Resistance 10.135 Ω | DC Resistance 20.027 Ω | DC Resistance 30.055 Ω | Switching Frequency 75 | Turns Ratio4:1:0.67 | Saturation Current7.4 A | Insulation Test Voltage4500 V (AC) | Length39.6 mm | Width43.18 mm | Height30.48 mm | MountTHT | SizeETD34 | Inductance180 µH | – | – | –Check availability | |||
 | SPECWE-FI Leaded Toroidal Line Choke, –, – | Simulation– | Availability – | Status Activei| Production is active. Expected lifetime: >10 years. | Product seriesWE-FI Leaded Toroidal Line Choke | – | – | – | – | – | – | – | – | – | – | – | Length16.5 mm | Width10.7 mm | – | MountTHT | – | Inductance150 µH | Rated Current2.5 A | DC Resistance0.1 Ω | –Check availability |
| Expected Availability | Opening inventory | Quantity |
|---|---|---|
| Current Availability | – | – |