ADI LTC3490EDD#TRPBF
| Manufacturer | |
| MPN | LTC3490EDD#TRPBF |
| LCSC Part # | C684825 |
| Packaging | DFN-8-EP(3x3) |
| Customer # | |
| Key Attributes | 2.8V~4V 1.3MHz 1 Boost DC-DC 350mA 1V~3.2V DFN-8-EP(3x3) LED Drivers ICs RoHS |
| Datasheet |  ADI LTC3490EDD#TRPBF |
Products Specifications
Show similar products (0) >| Type | Description | |
|---|---|---|
| Category | Integrated Circuits (ICs)/Power Management (PMIC)/LED Drivers ICs | |
| Manufacturer | ADI | |
| Packaging | DFN-8-EP(3x3) | |
| Output Voltage | 2.8V~4V | |
| Features | Over Voltage Protection;LED open-circuit protection;Over-Temperature Protection (OTP) | |
| Frequency - Switching | 1.3MHz | |
| Switch Tube (Built-In/External) | - | |
| Voltage - Input(AC) | - | |
| Operating temperature | -40℃~+85℃ | |
| Number of Channels | 1 | |
| Topology | Boost | |
| Type | DC-DC | |
| Output Current | 350mA | |
| Constant Current Accuracy | - | |
| Voltage - Input(DC) | 1V~3.2V |
Additional Information
| Type | Details |
|---|---|
| Minimum | 1 |
| Multiple | 1 |
| Standard Packaging | 2500 |
| Sales Unit | Piece |
| EDA Models | EasyEDA Model |
Introduction
The LTC3490 provides constant current drive for 1W LED applications. It is a high-efficiency boost converter capable of operating from 1 or 2 NiMH or alkaline cells, generating a constant current of 350mA with a maximum output voltage of 4V. It incorporates a 100mΩ NFET switch and a 130mΩ PFET synchronous rectifier. The internally set fixed switching frequency is 1.3MHz.
If the output load is disconnected, the LTC3490 limits the output voltage to 4.7V. It also features analog dimming, which proportionally reduces the drive current based on the CTRL/SHDN pin voltage. A low battery logic output signals when the battery voltage falls below 1V per cell. The UVLO circuit shuts down the LTC3490 when the battery voltage drops below 0.85V per cell. The feedback loop is internally compensated to minimize component count.
Features
- 350mA constant current output
- 2.8V to 4V output range
- 1- or 2-cell NiMH or alkaline battery input
- Synchronous rectification: up to 90% efficiency
- Fixed frequency operation: 1.3MHz
- Low quiescent current: <1mA
- Ultra-low shutdown current: <50μA
- Open-circuit LED output clamped to 4.7V
- V_IN range: 1V to 3.2V
- Dimming control
- Undervoltage lockout for battery protection
- Low-profile (0.75mm) 3mm x 3mm thermally enhanced 8-pin DD and S8 packages
Applications
- Portable lighting
- Rechargeable flashlights
| Qty | Unit Price(Reference Only) | Total Amount |
|---|---|---|
| 1+ | $ 3.9745 | $ 3.97 |
| 200+ | $ 1.5389 | $ 307.78 |
| 500+ | $ 1.4849 | $ 742.45 |
| 1,000+ | $ 1.4571 | $ 1457.10 |
Standard Packaging2500/Full Reel | ||
Products Specifications
Show similar products (0) >| Type | Description | |
|---|---|---|
| Category | Integrated Circuits (ICs)/Power Management (PMIC)/LED Drivers ICs | |
| Manufacturer | ADI | |
| Packaging | DFN-8-EP(3x3) | |
| Output Voltage | 2.8V~4V | |
| Features | Over Voltage Protection;LED open-circuit protection;Over-Temperature Protection (OTP) | |
| Frequency - Switching | 1.3MHz | |
| Switch Tube (Built-In/External) | - | |
| Voltage - Input(AC) | - | |
| Operating temperature | -40℃~+85℃ | |
| Number of Channels | 1 | |
| Topology | Boost | |
| Type | DC-DC | |
| Output Current | 350mA | |
| Constant Current Accuracy | - | |
| Voltage - Input(DC) | 1V~3.2V |
Additional Information
| Type | Details |
|---|---|
| Minimum | 1 |
| Multiple | 1 |
| Standard Packaging | 2500 |
| Sales Unit | Piece |
| EDA Models | EasyEDA Model |
Introduction
The LTC3490 provides constant current drive for 1W LED applications. It is a high-efficiency boost converter capable of operating from 1 or 2 NiMH or alkaline cells, generating a constant current of 350mA with a maximum output voltage of 4V. It incorporates a 100mΩ NFET switch and a 130mΩ PFET synchronous rectifier. The internally set fixed switching frequency is 1.3MHz.
If the output load is disconnected, the LTC3490 limits the output voltage to 4.7V. It also features analog dimming, which proportionally reduces the drive current based on the CTRL/SHDN pin voltage. A low battery logic output signals when the battery voltage falls below 1V per cell. The UVLO circuit shuts down the LTC3490 when the battery voltage drops below 0.85V per cell. The feedback loop is internally compensated to minimize component count.
Features
- 350mA constant current output
- 2.8V to 4V output range
- 1- or 2-cell NiMH or alkaline battery input
- Synchronous rectification: up to 90% efficiency
- Fixed frequency operation: 1.3MHz
- Low quiescent current: <1mA
- Ultra-low shutdown current: <50μA
- Open-circuit LED output clamped to 4.7V
- V_IN range: 1V to 3.2V
- Dimming control
- Undervoltage lockout for battery protection
- Low-profile (0.75mm) 3mm x 3mm thermally enhanced 8-pin DD and S8 packages
Applications
- Portable lighting
- Rechargeable flashlights
Compliance & Export Codes
| Type | Details |
|---|---|
| RoHS | |
| ECCN | EAR99 |
| CNHTS | 8542399000 |
| USHTS | 8542390001 |
| TARIC | 8542399000 |
| CAHTS | 8542390000 |
| BRHTS | 85423999 |
| INHTS | 85423900 |
| MXHTS | 8542.39.99 |
| Type | Details |
|---|---|
| RoHS | |
| ECCN | EAR99 |
| CNHTS | 8542399000 |
| USHTS | 8542390001 |
| TARIC | 8542399000 |
| Type | Details |
|---|---|
| CAHTS | 8542390000 |
| BRHTS | 85423999 |
| INHTS | 85423900 |
| MXHTS | 8542.39.99 |