Overview
The TPS61194PWPR is a high-performance, four-channel LED driver produced by Texas Instruments. This device is designed for medium-sized LCD backlight applications and other industrial lighting systems. It features an integrated DC-DC converter that supports both boost and SEPIC modes, allowing for flexible and efficient operation. The TPS61194PWPR includes four high-precision current sinks, each capable of driving up to 100 mA per channel, with a current matching of 1% typical. The device also incorporates extensive fault detection features, including input voltage overvoltage and undervoltage protection, open and shorted LED detection, and thermal shutdown. This makes it a robust and reliable choice for various industrial and automotive applications.
Key Specifications
| Parameter | Value | Unit |
|---|---|---|
| Input Voltage Range | 4.5 V to 40 V | V |
| Output Voltage | Up to 45 V | V |
| Switching Frequency | 300 kHz to 2.2 MHz | Hz |
| Current per Channel | Up to 100 mA | mA |
| Current Matching | 1% (typical) | % |
| Dimming Ratio | 10,000:1 at 100 Hz | - |
| Package Type | HTSSOP (20 pins) | - |
| Body Size | 6.50 mm × 4.40 mm | mm |
| Junction-to-Ambient Thermal Resistance | 44.2 °C/W | °C/W |
Key Features
- Four high-precision current sinks with current matching of 1% typical.
- LED current up to 100 mA per channel, with outputs combinable for higher current per string.
- Integrated boost/SEPIC DC-DC converter with adaptive output voltage control.
- High dimming ratio of 10,000:1 at 100 Hz.
- Spread spectrum for EMI reduction and external synchronization input.
- Extensive fault detection features including input voltage OVP and UVLO, open and shorted LED detection, and thermal shutdown.
- Minimum number of external components required.
- PWM brightness control with input frequency range from 100 Hz to 20 kHz.
Applications
- Industrial backlighting systems in control panels.
- Industrial PCs.
- Test and measurement equipment.
- Automotive infotainment and lighting systems.
- Medium-sized LCD backlight applications.
Q & A
- What is the input voltage range of the TPS61194PWPR?
The input voltage range is from 4.5 V to 40 V.
- What is the maximum output voltage of the TPS61194PWPR?
The maximum output voltage is up to 45 V.
- How many channels does the TPS61194PWPR have, and what is the current per channel?
The device has four channels, each capable of driving up to 100 mA.
- What is the dimming ratio of the TPS61194PWPR?
The dimming ratio is 10,000:1 at 100 Hz.
- Does the TPS61194PWPR support external synchronization for the DC-DC converter?
Yes, it supports external synchronization through the SYNC pin.
- What fault detection features are integrated into the TPS61194PWPR?
The device includes input voltage OVP and UVLO, open and shorted LED detection, and thermal shutdown.
- How is the brightness controlled in the TPS61194PWPR?
Brightness is controlled using the PWM input with a frequency range from 100 Hz to 20 kHz.
- What is the package type and body size of the TPS61194PWPR?
The package type is HTSSOP (20 pins) with a body size of 6.50 mm × 4.40 mm.
- What is the junction-to-ambient thermal resistance of the TPS61194PWPR?
The junction-to-ambient thermal resistance is 44.2 °C/W.
- Can the outputs of the TPS61194PWPR be combined for higher current per string?
Yes, the outputs can be combined externally for higher current per string.
