Texas Instruments TPS61040DDCR, DC-DC Boost Regulator, 1 MHz switching frequency, 28 V output, 350 mA switch current limit, PWM dimming, SOT-23-5 package, -40 to 85 °C.
| Parameter | Value |
|---|---|
| Type | DC DC Regulator |
| Mounting | Surface Mount |
| Voltage - output | 28V |
| Supply voltage | 1.8V |
| Current - output (Channel) | 350mA (Switch) |
| Frequency | 1MHz |
| I/O channels | 1 |
| Operating temperature | -40°C~85°C(TA) |
| Dimming | PWM |
| Package | Tape & Reel (TR); Cut Tape (CT) |
| Topology | Step-Up (Boost) |
| Applications | Backlight |
| Case | SOT-23-5 Thin, TSOT-23-5 |
| Internal switch | Yes |
The 28 V output ceiling covers series strings of up to six to eight white LEDs, depending on forward voltage. PWM dimming on the enable pin gives clean, flicker-free brightness control without pulling the output down.
The single-output boost topology with internal switch reduces external BOM count to one inductor, one diode, one capacitor, and a couple of resistors.
Yes — the TPS61040DDCR is specifically listed for backlight applications and includes a PWM dimming input, making it suitable for driving series-connected white LEDs up to 28 V total.
Typical applications include white LED backlighting for small LCD panels, bias supplies for portable devices, and general-purpose step-up converters requiring up to 28 V output from a low-voltage battery or rail.