Specifications
| Attribute | Value |
| Package | Tube |
| Series | True Color PWM™ |
| ProductStatus | Obsolete |
| Type | DC DC Regulator |
| Topology | Step-Up (Boost) |
| InternalSwitch(s) | Yes |
| NumberofOutputs | 1 |
| Voltage-Supply(Min) | 2.5V |
| Voltage-Supply(Max) | 12V |
| Voltage-Output | 27V |
| Current-Output/Channel | 350mA (Switch) |
| Frequency | 2.3MHz |
| Dimming | PWM |
| Applications | Backlight |
| OperatingTemperature | -40°C ~ 85°C (TA) |
| MountingType | Surface Mount |
| Package/Case | 8-VFSOP (0.049, 1.25mm Width) |
Overview
Description
LT3491ESC8 is an Evaluation Circuit (EC/ESC) board for the LT3491 LED driver from Analog Devices/Linear Technology. It is a ready-made demonstration/design reference that shows how to drive LEDs with a constant current using the LT3491’s buck converter topology.
Key points:
- Demonstrates constant-current LED driving, with current set by a sense resistor.
- Supports dimming via PWM and/or analog dimming inputs.
- Useful for validating performance (current accuracy, ripple, efficiency) and as a starting point for production designs.
- Includes typical application circuitry, connectors, and BOM references to help you implement your own LED driver solution.
For exact pinout, resistor values, and configuration options, consult the LT3491 datasheet and the LT3491-ESC8 evaluation board page on Analog Devices’ website. This will provide schematics, BOM, and testing guidance.
Key points:
- Demonstrates constant-current LED driving, with current set by a sense resistor.
- Supports dimming via PWM and/or analog dimming inputs.
- Useful for validating performance (current accuracy, ripple, efficiency) and as a starting point for production designs.
- Includes typical application circuitry, connectors, and BOM references to help you implement your own LED driver solution.
For exact pinout, resistor values, and configuration options, consult the LT3491 datasheet and the LT3491-ESC8 evaluation board page on Analog Devices’ website. This will provide schematics, BOM, and testing guidance.
Features
LT3491ESC8 features (concise):
- Single-channel, constant-current boost LED driver in an 8-pin ESC8 package
- Wide input range suitable for battery, USB, and automotive applications
- External sense resistor sets LED current with tight regulation
- Boosts input to drive high-voltage LED strings
- Dimming: PWM and analog/DC dimming via DIM/CTRL input
- Comprehensive protection: open-LED, short-circuit, overvoltage, undervoltage, thermal shutdown
- Fixed-frequency switching with high efficiency and soft-start
- Enable/disable control and fault reporting
- Robust in compact design with minimal external components (inductor, Schottky diode, sense resistor, input capacitor)
- Single-channel, constant-current boost LED driver in an 8-pin ESC8 package
- Wide input range suitable for battery, USB, and automotive applications
- External sense resistor sets LED current with tight regulation
- Boosts input to drive high-voltage LED strings
- Dimming: PWM and analog/DC dimming via DIM/CTRL input
- Comprehensive protection: open-LED, short-circuit, overvoltage, undervoltage, thermal shutdown
- Fixed-frequency switching with high efficiency and soft-start
- Enable/disable control and fault reporting
- Robust in compact design with minimal external components (inductor, Schottky diode, sense resistor, input capacitor)
Pinout
- Pin count: 8 pins (MSOP-8/ESC8 package).
- Function: High-efficiency constant-current LED driver with a boost/step-up regulator to drive LED strings (e.g., white LEDs); supports dimming (PWM/analog) and protections.
- Function: High-efficiency constant-current LED driver with a boost/step-up regulator to drive LED strings (e.g., white LEDs); supports dimming (PWM/analog) and protections.
Manufacturer
- Manufacturer: Analog Devices, Inc. (ADI). The LT prefix comes from Linear Technology, which ADI acquired in 2017; ADI continues to market LT-branded parts.
- What kind of company: A global semiconductor company that designs and manufactures analog, mixed-signal, and DSP integrated circuits (e.g., power management, sensors, data converters). Publicly traded (Nasdaq: ADI), headquartered in Norwood, Massachusetts, serving automotive, industrial, communications, and consumer markets.
- What kind of company: A global semiconductor company that designs and manufactures analog, mixed-signal, and DSP integrated circuits (e.g., power management, sensors, data converters). Publicly traded (Nasdaq: ADI), headquartered in Norwood, Massachusetts, serving automotive, industrial, communications, and consumer markets.
Application
- LED backlighting for LCDs, keyboards, and signage (constant-current drive)
- Automotive lighting and indicators (wide input range, rugged operation)
- Portable/battery-powered devices (handhelds, cameras) needing efficient buck/boost power with current regulation
- General DC-DC power supplies requiring high efficiency, constant-current LED drive
- Dimmable LED applications using PWM control for brightness management
Note: LT3491ESC8 refers to the LT3491 in an 8-pin package; all use cases rely on its constant-current LED drive with buck/boost capability.
- Automotive lighting and indicators (wide input range, rugged operation)
- Portable/battery-powered devices (handhelds, cameras) needing efficient buck/boost power with current regulation
- General DC-DC power supplies requiring high efficiency, constant-current LED drive
- Dimmable LED applications using PWM control for brightness management
Note: LT3491ESC8 refers to the LT3491 in an 8-pin package; all use cases rely on its constant-current LED drive with buck/boost capability.
Package
LT3491ESC8 is available in an 8-pin MSOP package (MSOP-8).
