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Overview
| Topology | Flyback Converter |
| Input voltage | 36-72 V |
| Switching frequency | 40-650 kHz |
| Output 1 | 15 V / 0.05 A |
| Output 2 | 15 V / 0.1 A |
| Output 3 | 24 V / 0.06 A |
| Output 4 | 3.3 V / 0.4 A |
| Output 5 | 5 V / 0.3 A |
| Output 6 | -15 V / 0.05 A |
| Output 7 | 12 V / 0.1 A |
| IC revision | C |
Description
The LT3511 is a high voltage monolithic switching regulator specifically designed for the isolated flyback topology. No third winding or opto-isolator is required for regulation as the part senses output voltage directly from the primary-side flyback waveform. The device integrates a 240mA, 150V power switch, high voltage circuitry, and control into a high voltage 16-lead MSOP package with four leads removed.
The LT3511 operates from an input voltage range of 4.5V to 100V and delivers up to 2.5W of isolated output power. Two external resistors and the transformer turns ratio easily set the output voltage. Off-the-shelf transformers are available for several applications. The high level of integration and the use of boundary mode operation results in a simple, clean, tightly regulated application solution to the traditionally tough problem of isolated power delivery.
Features
- 4.5V to 100V Input Voltage Range
- Internal 240mA, 150V Power Switch
- Boundary Mode Operation
- No Transformer Third Winding or
- Opto-Isolator Required for Regulation
- Improved Primary-Side Winding Feedback Load Regulation
- VOUT Set with Two External Resistors
- BIAS Pin for Internal Bias Supply and Power Switch Driver
- No External Start-Up Resistor
- 16-Lead MSOP Package
Remarks:-Refer Table 1.Predesigned Transformers page no.10
Typical applications
- Automotive Power Supplies
- Isolated Industrial Power Supplies
- Isolated Telecom Power Supplies
- Housekeeping Power Supplies
- Medical Power Supplies
More information
Products
Order Code | Datasheet | Simulation | Downloads | Status | Product series | VIN | VOut1(V) | IOut1(mA) | VOut2(V) | IOut2(mA) | Vaux(V) | L(µH) | n | ISAT(A) | LS(µH) | VT(V (AC)) | Size | IC Reference | Samples | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
 | WE-FLYLT Flyback Transformers for Linear Technology, 35 - 75 V (DC), 3.3 V | Status Activei| Production is active. Expected lifetime: >10 years. | Product seriesWE-FLYLT Flyback Transformers for Linear Technology | Input Voltage 35 - 75 V (DC) | Output Voltage 13.3 V | Output Current 1600 mA | – | – | Auxiliary Voltage6.6 V | Inductance400 µH | Turns Ratio6:1:2 | Saturation Current0.75 A | Leakage Inductance8 µH | Insulation Test Voltage1500 V (AC) | SizeEP7 | IC ReferenceLT8300 | ||||
| WE-FLYLT Flyback Transformers for Linear Technology, 35 - 75 V (DC), 5 V | Status Activei| Production is active. Expected lifetime: >10 years. | Product seriesWE-FLYLT Flyback Transformers for Linear Technology | Input Voltage 35 - 75 V (DC) | Output Voltage 15 V | Output Current 1400 mA | – | – | Auxiliary Voltage5 V | Inductance300 µH | Turns Ratio4:1:1 | Saturation Current0.5 A | Leakage Inductance3 µH | Insulation Test Voltage1500 V (AC) | SizeEP7 | IC ReferenceLT8300 | ||||
| WE-FLYLT Flyback Transformers for Linear Technology, 36 - 72 V (DC), 24 V | Status Activei| Production is active. Expected lifetime: >10 years. | Product seriesWE-FLYLT Flyback Transformers for Linear Technology | Input Voltage 36 - 72 V (DC) | Output Voltage 124 V | Output Current 180 mA | – | – | Auxiliary Voltage5 V | Inductance300 µH | Turns Ratio5:5:1 | Saturation Current0.56 A | Leakage Inductance3 µH | Insulation Test Voltage1500 V (AC) | SizeEP7 | IC ReferenceLT8300 | ||||
| WE-FLYLT Flyback Transformers for Linear Technology, 36 - 72 V (DC), 15 V | Status Activei| Production is active. Expected lifetime: >10 years. | Product seriesWE-FLYLT Flyback Transformers for Linear Technology | Input Voltage 36 - 72 V (DC) | Output Voltage 115 V | Output Current 1140 mA | – | – | Auxiliary Voltage5 V | Inductance350 µH | Turns Ratio6:3:1 | Saturation Current0.52 A | Leakage Inductance4.5 µH | Insulation Test Voltage1500 V (AC) | SizeEP7 | IC ReferenceLT8300 | ||||
| WE-FLYLT Flyback Transformers for Linear Technology, 36 - 72 V (DC), 15 V | Status Activei| Production is active. Expected lifetime: >10 years. | Product seriesWE-FLYLT Flyback Transformers for Linear Technology | Input Voltage 36 - 72 V (DC) | Output Voltage 115 V | Output Current 170 mA | Output Voltage 215 V | Output Current 270 mA | – | Inductance350 µH | Turns Ratio2:1:1 | Saturation Current0.52 A | Leakage Inductance4.5 µH | Insulation Test Voltage1500 V (AC) | SizeEP7 | IC ReferenceLT8300 | ||||
750313930 | Offline Transformer, –, – | Simulation– | Downloads– | Status Activei| Production is active. Expected lifetime: >10 years. | Product series Offline Transformer | – | – | – | – | – | – | – | – | – | – | – | – | – |