Overview
The LM36011YKBR from Texas Instruments is an ultra-small, inductorless, single-LED flash driver designed for high-power applications. This device is capable of delivering up to 1.5 A of LED flash current and up to 376 mA of torch current over an input voltage range of 2.5 V to 5.5 V. It features a highly adjustable current source, controlled via an I2C-compatible interface, allowing for precise adjustment of flash and torch current levels, as well as flash time-out duration. The LM36011YKBR is optimized for thermal management with a small total solution size of less than 4 mm^2 and includes various protection features such as thermal scale-back, thermal shutdown, and LED fault detection.
Key Specifications
| Parameter | Min | Max | Unit |
|---|---|---|---|
| Input Voltage (VIN) | 2.5 | 5.5 | V |
| Junction Temperature (TJ) | -40 | 125 | °C |
| Ambient Temperature (TA) | -40 | 85 | °C |
| Flash Current | 11 mA | 1.5 A | |
| Torch Current | 2.4 mA | 376 mA | |
| I2C Clock Frequency | 400 kHz | ||
| I2C Address | 0x64 | ||
| Junction-to-Ambient Thermal Resistance (RθJA) | 117.3 | °C/W |
Key Features
- Highly adjustable current source with 128 programmable current levels for both flash and torch modes.
- Hardware flash enable (STROBE) with an internal 300-kΩ pulldown resistor to GND.
- I2C-compatible interface for controlling features such as flash and torch current levels, flash time-out duration, and status flags.
- Input voltage monitor (IVFM) to adjust flash current based on input voltage.
- Thermal management features including thermal scale-back and thermal shutdown.
- LED fault detection for open or short conditions.
- Undervoltage lockout (UVLO) protection.
- Small total solution size of less than 4 mm^2.
Applications
- Mobile Phones
- Tablets
- IR LED Driver
- Video Surveillance: IP Camera
- Barcode Scanner
- Portable Data Terminal
Q & A
- What is the maximum flash current the LM36011YKBR can deliver?
The LM36011YKBR can deliver up to 1.5 A of LED flash current.
- What is the input voltage range for the LM36011YKBR?
The input voltage range is from 2.5 V to 5.5 V.
- How is the LM36011YKBR controlled?
The device is controlled via an I2C-compatible interface.
- What thermal protection features does the LM36011YKBR have?
The device includes thermal scale-back and thermal shutdown features.
- What is the purpose of the STROBE pin?
The STROBE pin is used for hardware flash enable and has an internal 300-kΩ pulldown resistor to GND.
- How many programmable current levels does the LM36011YKBR have?
The device has 128 programmable current levels for both flash and torch modes.
- What is the junction-to-ambient thermal resistance (RθJA) of the LM36011YKBR?
The RθJA is 117.3 °C/W.
- Does the LM36011YKBR have LED fault detection?
- What is the I2C address of the LM36011YKBR?
The I2C address is 0x64.
- What are some common applications of the LM36011YKBR?
Common applications include mobile phones, tablets, IR LED drivers, video surveillance, barcode scanners, and portable data terminals.
