Part Datasheet Review and Specification Mismatch

flux

I reviewed the part against the datasheet using the part-project sync approach: verify the official Datasheet URL, then use the datasheet as the source of truth for pin count, pin naming, and metadata
Datasheet URL
  • Official Kinetic Technologies PDF: https://www.kinet-ic.com/uploads/web/KTD2027/KTD2026-7-04h.pdf
  • Your project already had that same URL in context, and it now matches the official PDF URL.
Reviewed part info
  • MPN: KTD2027BEWE-TR
  • Manufacturer: Kinetic Technologies
  • Part Type: Integrated Circuit
  • Designator Prefix: U
  • Package in project assets: SON40P150X150X55-9N.kicad_mod
  • Official package from datasheet/product page: UTDFN 1.5x1.5-8, package code WE
  • Current symbol terminals found: D4, D3, D2, D1, VIN, SCL, SDA, GND, EXP
  • Current footprint pads found: 9 total pads
Key datasheet specs
  • 4-channel programmable constant-current RGBW LED driver with I²C control
  • VIN operating range: 2.7 V to 5.5 V
  • Output current: 0.125 mA to 24 mA per channel
  • Shutdown current: 0.1 µA typ, 1.0 µA max
  • Current accuracy: ±5%
  • Dropout at Dx pins: 75 mV typ, 120 mV max at 20 mA
  • Operating temp: -40 °C to +85 °C
  • Thermal shutdown: 140 °C typ
  • Package: UTDFN 1.5 x 1.5 mm, 8-pin, exposed center pad to GND plane
Cross-check results 1) Project description / metadata mismatches
I found several content mismatches in the project description:
  • Project says WLCSP → datasheet says UTDFN-8 / UTDFN 1.5x1.5-8
  • Project says triple-channel RGB in places → datasheet says 4-channel RGBW
  • Project says “up to three LED channels” → datasheet supports four current-sink outputs on KTD2027
  • The current description is generally for the KTD2026/2027 family, but parts of it describe the wrong package/family details
2) Symbol / pin naming
The core 8 named pins match the KTD2027 pin table well:
  • 1 D4
  • 2 D3
  • 3 D2
  • 4 D1
  • 5 VIN
  • 6 SCL
  • 7 SDA
  • 8 GND
So the main symbol pin names and numbering look mostly correct.
3) Pin-type mismatches
I found these issues in the current symbol properties:
  • GND is currently typed as Power In → should be Ground
  • EXP is currently typed as Passive → should likely be treated as Ground/exposed pad tied to ground plane
  • SCL is currently typed as Input → acceptable
  • SDA is currently typed as Bi-Directional → acceptable
  • D1/D2/D3/D4 are typed as Output → correct
  • VIN is typed as Power In → correct
4) Pin count / exposed pad
This is the main structural issue:
  • Datasheet pin table shows 8 numbered pins
  • Your symbol/footprint use 9 pads/terminals, including EXP
  • The datasheet also says the center exposed pad underneath the package should be soldered to ground
So:
  • Physical footprint with 9 pads is plausible and likely correct for an 8-pin UTDFN with exposed pad
  • But the exposed pad is not clearly shown as numbered “9” in the extracted datasheet text
  • That means the current EXP pin number = 9 should be treated as needs confirmation
  • If you want strict datasheet consistency, this pad should be explicitly documented as exposed pad / center pad tied to GND, not silently treated as a normal signal pin
5) Footprint cross-check
The footprint name SON40P150X150X55-9N is mechanically consistent with:
  • ~1.5 mm x 1.5 mm body
  • 0.40 mm pitch
  • 9 lands total including center pad
That aligns well with the datasheet’s UTDFN 1.5x1.5-8 with exposed center pad. So I do not see an obvious footprint-package mismatch; it looks more like a naming convention difference than a bad footprint.
Summary of flagged mismatches
  1. Description/package text mismatch: says WLCSP, should be UTDFN-8
  2. Channel-count mismatch in description: says 3-channel/triple-channel in places, should be 4-channel RGBW
  3. GND pin type wrong: should be Ground
  4. EXP pad handling is ambiguous: present in symbol/footprint, but datasheet evidence supports it as grounded exposed pad, not a generic passive pin
  5. EXP pin number “9” needs confirmation/documentation since datasheet pin table is 8-pin, though the exposed pad clearly exists
Overall assessment
  • MPN / manufacturer / designator prefix: good
  • Official datasheet URL: good
  • Main 8-pin symbol mapping: good
  • Footprint: likely good
  • Description and some pin semantics: need cleanup
If you want, I can make the next pass and fix the project description plus the terminal properties for GND and EXP.
Fix all mismatches
Check decoupling issues
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    Assets

    step

    KTD2027BEWE-TR

    KTD2027BEWE-TR.step3D Model
    KTD2027BEWE-TR

    KTD2027BEWE-TR

    KTD2027BEWE-TR Symbol.svgDefault
    kicad_mod

    KTD2027BEWE-TR

    SON40P150X150X55-9N.kicad_modFootprint
    KTD2027BEWE-TR-thumb.png

    KTD2027BEWE-TR-thumb.png

    KTD2027BEWE-TR-thumbThumbnail

    KTD2027BEWE-TR

    KTD2027BEWE-TR thumbnail
    LED Lighting Driver ICs LED Lighting Drivers 4-Channel RGBW Driver, I2C, 1.5x1.5mm TDFN
    The KTD2027BEWE-TR is a highly integrated, low-power RGB LED driver designed for portable and battery-powered applications. It features a compact WLCSP package and provides precise current control for up to three LED channels. The device includes an I²C-compatible interface, enabling flexible control of brightness, color mixing, and lighting effects. Integrated features such as programmable current sinks, dimming control, and built-in protection mechanisms make it suitable for indicators, backlighting, and decorative lighting in consumer electronics.
    Key Features Triple-channel constant current LED driver (RGB support) I²C-compatible digital interface Independent brightness control per channel Programmable current up to ~24 mA per channel Built-in PWM dimming and pattern generation Low quiescent current for power-sensitive applications Wide input voltage range Thermal shutdown and overcurrent protection Small WLCSP package (suitable for compact designs) Applications Mobile devices and wearables Status indicators and notification LEDs Backlighting and decorative lighting IoT and portable electronics Absolute Maximum Ratings Supply Voltage (VDD): −0.3 V to +6.0 V Logic Input Voltage: −0.3 V to VDD + 0.3 V Operating Temperature Range: −40°C to +85°C Storage Temperature Range: −55°C to +150°C Recommended Operating Conditions Supply Voltage (VDD): 1.8 V to 5.5 V LED Forward Voltage: Dependent on external LEDs Ambient Temperature: −40°C to +85°C Electrical Characteristics (Typical) Supply Current (Idle): < 1 µA (shutdown mode) Channel Current Accuracy: ±5% (typical) Maximum Output Current: ~24 mA per channel I²C Clock Frequency: Up to 400 kHz (Fast Mode) Functional Description
    The KTD2027BEWE-TR operates as a constant-current sink driver for RGB LEDs. Each channel can be independently programmed via the I²C interface to control brightness and enable dynamic lighting effects. Internal PWM generators allow smooth dimming without requiring continuous microcontroller intervention. The device also integrates protection features such as thermal shutdown and current limiting to ensure reliable operation.
    Pin Configuration (Typical WLCSP) VDD – Power supply GND – Ground SDA – I²C data line SCL – I²C clock line LED1 – Current sink output (Red) LED2 – Current sink output (Green) LED3 – Current sink output (Blue) Package Information Package Type: WLCSP (Wafer-Level Chip Scale Package) Mounting: Surface mount Tape & Reel: Yes (TR suffix) Ordering Information KTD2027BEWE-TR: Tape and reel packaging for automated assembly
    #commonpartslibrary #integratedcircuit #leddriver

    Properties

    KTD2027BEWE-TR

    Kinetic Technologies

    Integrated Circuit

    kinet-ic.com/uploads/web/KTD2027/KTD2026-7-04h.pdf

    U

    creativecommons.org/licenses/by/4.0/

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