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Texas Instruments LP8550TLX-A/NOPB — Discrete Semiconductors

LP8550TLX-A/NOPB TI Boost LED Driver, 6 Outputs, 40V

MPNLP8550TLX-A/NOPB
End of Life

Texas Instruments LP8550TLX-A/NOPB DC-DC boost regulator, 6 outputs, 40V, 1.25MHz, PWM dimming, 25-DSBGA.

$1.12Ref. price · indicative, final on quote
Texas Instruments LP8550TLX-A/NOPB datasheet (PDF)
Packaging25-WFBGA, DSBGA
Sourced new & surplus through independent channelsAuthenticity-screened · ESD-safe packingListing updated Aug 2026

Specifications

LP8550TLX-A/NOPB specifications
ParameterValue
TypeDC DC Regulator
MountingSurface Mount
Voltage - output40V
Voltage2.7V
Current - output (Channel)450mA (Switch)
Frequency1.25MHz
I/O channels6
Operating temperature-30°C ~ 85°C (TA)
DimmingPWM
PackageBulk
TopologyStep-Up (Boost)
ApplicationsBacklight, Lighting
Case25-WFBGA, DSBGA
Internal switchYes

Product details

Boost regulator with six independent outputs

The LP8550TLX-A/NOPB: This is a DC-DC step-up (boost) regulator with an integrated switch, driving up to six LED channels from a single inductor. The 40V output ceiling means it can power series strings of LEDs — common in backlight panels where each string needs a consistent current. The 450 mA switch current limit sets the total power budget: at 40 V output, that is about 18 W before derating.

PWM dimming and supply range

Dimming is controlled via a PWM input — the internal logic modulates the switch duty cycle to adjust LED brightness without audible noise. The supply range spans 2.7 V to 22 V, covering single-cell Li-ion up to a 12 V rail. Operating temperature is -30°C to 85°C, which covers most indoor and automotive cabin applications but not under-hood extremes. The 25-DSBGA package (2.46 x 2.46 mm) is a fine-pitch BGA — a 4-layer PCB with micro-vias is recommended for fan-out.

Texas Instruments provides RoHS and REACH compliance documentation for this part.

Frequently asked questions

How can I order LP8550TLX-A/NOPB or check availability?

This part is sourced to order through independent distribution.

What is the closest functional second-source for LP8550TLX-A/NOPB — TLC5940RHBR?

The TLC5940RHBR is a linear LED driver with a shift-register interface, not a boost regulator — it requires an external boost stage. The TLC69611RTWR is also a linear constant-current driver. Neither is a drop-in replacement for the LP8550TLX-A/NOPB; the topology (boost vs linear) and pinout differ. A board redesign would be needed.

What is LP8550TLX-A/NOPB's listed type and dimming method?

It is a DC-DC Regulator (boost topology) with PWM dimming control. The internal switch handles up to 450 mA, and the six outputs can be independently controlled.