Overview
The TPS61195RUYR is a highly integrated white LED driver IC designed by Texas Instruments for large-size LCD backlighting applications. This device features a built-in high-efficiency boost regulator with an integrated 2.5A/50V power MOSFET, making it suitable for powering up to 96 white LEDs. The TPS61195RUYR supports multiple brightness dimming methods, including PWM, SMBus, and analog dimming, and it includes various protection mechanisms such as over-current, over-voltage, and thermal protection.
Key Specifications
| Parameter | Value | Unit |
|---|---|---|
| Input Voltage Range | 4.5 to 21 | V |
| Output Voltage Range | Vin to 45 | V |
| Switching Frequency | 600 kHz to 1 MHz | |
| Current Sink Regulators | 8 channels, 30 mA each | |
| Current Matching | 1% | |
| Operating Ambient Temperature | -40 to 85 | °C |
| Operating Junction Temperature | -40 to 125 | °C |
| Package Type | 28-pin WQFN (RUY) |
Key Features
- PWM and SMBus brightness control interface
- 8-bit (256 steps) brightness level control
- Integrated 2.5A/50V power MOSFET
- Programmable over-voltage threshold
- Internal loop compensation
- Over-current, short-circuit, and thermal protection
- Adaptive boost output for best efficiency
- Support for up to 96 LEDs with 1% current matching
- Soft-start circuit to avoid inrush current during startup
- Built-in linear regulator for IC supply
Applications
- Notebook and netbook LCD display backlighting
- Large-size LCD backlighting
- General LED lighting applications requiring high precision current regulation
Q & A
- What is the input voltage range of the TPS61195RUYR?
The input voltage range is from 4.5V to 21V.
- How many LEDs can the TPS61195RUYR support?
The device can support up to 96 white LEDs.
- What are the dimming methods supported by the TPS61195RUYR?
The device supports PWM, SMBus, and analog dimming methods.
- What is the switching frequency range of the TPS61195RUYR?
The switching frequency is programmable between 600 kHz and 1 MHz.
- Does the TPS61195RUYR have built-in protection mechanisms?
Yes, it includes over-current, short-circuit, and thermal protection mechanisms.
- How does the TPS61195RUYR adjust its output voltage for efficiency?
The boost output voltage is automatically adjusted to minimize the voltage drop across the IFB pins, ensuring best efficiency.
- What is the package type of the TPS61195RUYR?
The device is packaged in a 28-pin WQFN (RUY) package.
- How does the TPS61195RUYR handle unused current sink regulators?
Unused IFB pins can be left open or shorted to ground to disable them.
- Does the TPS61195RUYR have a soft-start feature?
Yes, it includes a soft-start circuit to avoid inrush current during startup.
- What is the operating ambient temperature range of the TPS61195RUYR?
The operating ambient temperature range is from -40°C to 85°C.
