Part Datasheet Review and Specification Mismatch

4:09

Evaluating schematic design needs.

Planning parallel tasks.

Reviewing the bill of materials.

Analyzing the schematic.

Analyzing the PCB layout.

Searching the project.

Searching web for: "KTD2027BEWE-TR datasheet PDF Kinetic Technologies official"

Searching for project properties.

Searching properties.

Found 1 results.

Searching for project properties.

Searching 3 domains.

Gathering project data.

Search complete — 106 results across 5 domains.

Fetching web page.

Found 1 results.

Looking for "pin configuration" in KTD2026-7-04h.pdf

Looking for "pin description" in KTD2026-7-04h.pdf

Looking for "electrical characteristics" in KTD2026-7-04h.pdf

Looking for "absolute maximum ratings" in KTD2026-7-04h.pdf

Looking for "mechanical data" in KTD2026-7-04h.pdf

Looking for "exposed pad" in KTD2026-7-04h.pdf

Looking for "recommended footprint exposed pad electrical connection" in KTD2026-7-04h.pdf

Looking for "UTDFN 1.5x1.5 8-pin package center pad" in KTD2026-7-04h.pdf

Evaluating naming and specifications.

Citing sources and procedural accuracy.

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

Description/package text mismatch: says WLCSP, should be UTDFN-8
Channel-count mismatch in description: says 3-channel/triple-channel in places, should be 4-channel RGBW
GND pin type wrong: should be Ground
EXP pad handling is ambiguous: present in symbol/footprint, but datasheet evidence supports it as grounded exposed pad, not a generic passive pin
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

Save review notes

a day

Set Datasheet URL to "https://www.kinet-ic.com/uplo..."

Set Datasheet URL to "https://www.kinet-ic.com/uploads/web/KTD2027/KTD2026-7-04h.pdf"

a day

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Project Name

KTD2027BEWE-TR

Description

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

Manufac… Number

KTD2027BEWE-TR

Manufac…er Name

Kinetic Technologies

Part Type

Integrated Circuit

Datasheet URL

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

Designator Prefix

License