Overview
The TPS61193PWPR from Texas Instruments is a high-performance, three-channel LED driver designed for medium-sized LCD backlight applications and other industrial lighting needs. This device integrates a DC-DC converter that supports both boost and SEPIC modes, along with three high-precision current sinks. It offers a wide input voltage range of 4.5 V to 40 V, making it versatile for various power sources. The TPS61193 features adaptive output voltage control, which minimizes power consumption by adjusting the output voltage to the minimum necessary level. It also includes extensive fault detection capabilities, such as open and shorted LED detection, input voltage overvoltage and undervoltage protection, and thermal shutdown.
Key Specifications
| Parameter | Minimum | Typical | Maximum | Unit |
|---|---|---|---|---|
| Input Voltage Range | 4.5 | - | 40 | V |
| Output Voltage Range | - | - | 45 | V |
| LED Current per Channel | - | - | 100 | mA |
| Switching Frequency Range | 300 | - | 2200 | kHz |
| Dimming Ratio at 100 Hz | - | - | 10,000:1 | - |
| Package Type | - | - | HTSSOP (20) | - |
| Body Size | - | - | 6.50 mm × 4.40 mm | - |
| Junction-to-Ambient Thermal Resistance | - | - | 44.2 | °C/W |
Key Features
- Three high-precision current sinks with current matching of 1% (typical) and up to 100 mA per channel.
- Integrated boost/SEPIC DC-DC converter with adaptive output voltage control.
- Wide input voltage range from 4.5 V to 40 V.
- High dimming ratio of 10,000:1 at 100 Hz PWM frequency.
- Spread spectrum for lower EMI and optional external synchronization.
- Extensive fault detection features including open and shorted LED detection, input voltage OVP, UVLO, and thermal shutdown.
- PWM brightness control with input frequency range from 100 Hz to 20 kHz.
- Minimum number of external components required.
Applications
- Industrial backlighting systems in control panels.
- Industrial PCs.
- Test and measurement equipment.
- Medium-sized LCD backlight applications.
Q & A
- What is the input voltage range of the TPS61193?
The input voltage range of the TPS61193 is from 4.5 V to 40 V.
- How many current sinks does the TPS61193 have, and what is their maximum current capability?
The TPS61193 has three high-precision current sinks, each capable of up to 100 mA.
- What is the maximum output voltage of the DC-DC converter in the TPS61193?
The maximum output voltage of the DC-DC converter is up to 45 V.
- What is the dimming ratio of the TPS61193 at 100 Hz PWM frequency?
The dimming ratio is 10,000:1 at 100 Hz PWM frequency.
- Does the TPS61193 support external synchronization for the DC-DC converter?
Yes, the TPS61193 supports external synchronization through the SYNC pin.
- What fault detection features are integrated into the TPS61193?
The TPS61193 includes fault detection for open and shorted LEDs, input voltage overvoltage and undervoltage protection, and thermal shutdown.
- How is the brightness controlled in the TPS61193?
Brightness is controlled using PWM input with a frequency range from 100 Hz to 20 kHz.
- What is the package type and body size of the TPS61193PWPR?
The package type is HTSSOP (20) with a body size of 6.50 mm × 4.40 mm.
- What is the junction-to-ambient thermal resistance of the TPS61193?
The junction-to-ambient thermal resistance is 44.2 °C/W.
- What are some typical applications of the TPS61193?
Typical applications include industrial backlighting systems, industrial PCs, and test and measurement equipment.
