Texas Instruments LP55231SQX/NOPB DC-DC Regulator LED Driver, 9 outputs, 25.5mA per channel, PWM dimming, Switched Capacitor (Charge Pump) topology, 1.25MHz, 2.7V-5.5V supply, 24-WFQFN Exposed Pad, Tape & Reel.
| Parameter | Value |
|---|---|
| Type | DC DC Regulator |
| Mounting | Surface Mount |
| Supply voltage | 5.5V |
| Current - output (Channel) | 25.5mA |
| Frequency | 1.25MHz |
| I/O channels | 9 |
| Operating temperature | -30°C ~ 85°C (TA) |
| Dimming | PWM |
| Package | Tape & Reel (TR); Cut Tape (CT) |
| Topology | Switched Capacitor (Charge Pump) |
| Applications | Backlight |
| Case | 24-WFQFN Exposed Pad |
| Internal switch | Yes |
The Texas Instruments LP55231SQX/NOPB is a DC-DC regulator-type LED driver using a switched-capacitor (charge pump) topology, delivering 25.5 mA per channel across 9 outputs with PWM dimming.
The -30°C to 85°C ambient temperature grade fits indoor and portable backlight environments.
It is a 9-channel DC-DC regulator LED driver designed for backlight applications. The charge pump topology generates the LED drive voltage without an external inductor, and the 25.5 mA per channel output is suitable for small- to medium-sized LCD backlight arrays.
No. The TLC69611RTWR is a 16-channel linear LED driver with 60 mA per channel and no internal switch, while the LP55231SQX/NOPB is a 9-channel charge-pump regulator with 25.5 mA per channel. They are not pin-compatible and serve different topologies — a board redesign is required to swap between them.