Overview
The TPS61043DRBTG4, produced by Texas Instruments, is a high-frequency boost converter designed to drive white LEDs or similar lighting components. This device operates as a constant current source, regulating the LED current independently of the input voltage and the number of LEDs connected. It features an internal 400 mA MOSFET switch and integrated overvoltage protection, making it suitable for applications requiring higher LED currents or multiple LEDs in series.
Key Specifications
| Parameter | Value |
|---|---|
| Manufacturer | Texas Instruments |
| Part Number | TPS61043DRBTG4 |
| Topology | Step-Up (Boost) |
| Internal Switch(s) | Yes |
| Number of Outputs | 1 |
| Voltage - Supply (Min) | 1.8 V |
| Voltage - Supply (Max) | 6 V |
| Voltage - Output | 16.9 V |
| Current - Output / Channel | 60 mA |
| Frequency | 1 MHz |
| Dimming | PWM |
| Operating Temperature | -40°C to 85°C |
| Mounting Type | Surface Mount |
| Package / Case | 8-VDFN Exposed Pad |
Key Features
- Current source with 18-V overvoltage protection
- Powers up to 4 LEDs in series
- Input voltage range: 1.8 V to 6 V
- Internal 30-V switch
- Up to 85% efficiency
- Precise brightness control using PWM signal or analog signal
- Switching frequency up to 1 MHz
- Internal power MOSFET switch 400 mA
- Operates with small output capacitors down to 100 nF
- Disconnects LEDs during shutdown
- No load quiescent current 38 µA typical
- Shutdown current 0.1 µA typical
- Available in a small 3-mm × 3-mm QFN package
Applications
The TPS61043DRBTG4 is primarily used in backlighting applications, such as in LCD displays, LED lighting systems, and other devices requiring constant current LED driving. Its high efficiency, precise brightness control, and integrated overvoltage protection make it a reliable choice for various lighting solutions.
Q & A
- What is the input voltage range of the TPS61043DRBTG4?
The input voltage range is from 1.8 V to 6 V.
- How many LEDs can the TPS61043DRBTG4 power in series?
The device can power up to 4 LEDs in series.
- What is the maximum output voltage of the TPS61043DRBTG4?
The maximum output voltage is 16.9 V.
- What is the maximum output current per channel of the TPS61043DRBTG4?
The maximum output current per channel is 60 mA.
- What is the switching frequency of the TPS61043DRBTG4?
The switching frequency is up to 1 MHz.
- How does the TPS61043DRBTG4 control LED brightness?
The LED brightness can be controlled using a PWM signal or an analog signal.
- What is the operating temperature range of the TPS61043DRBTG4?
The operating temperature range is from -40°C to 85°C.
- What type of package does the TPS61043DRBTG4 come in?
The device comes in an 8-VDFN Exposed Pad package.
- Does the TPS61043DRBTG4 have overvoltage protection?
Yes, it has integrated overvoltage protection that limits the output voltage to typically 18 V.
- What happens to the LEDs during shutdown of the TPS61043DRBTG4?
The LEDs are disconnected from ground during shutdown.
