TLC7135CDW

TLC7135CDW is a small, Texas Instruments LED driver IC that functions as a constant-current regulator. It’s designed to power one or more LEDs from a DC supply with a simple external resistor that sets the LED current. The device maintains a constant LED current over variations in supply voltage and LED forward voltage, and it includes protections such as short-circuit and thermal shutdown. The CDW suffix typically denotes an 8-pin surface-mount package.
Key points:
- Purpose: simple constant-current LED driver for portable/low‑cost lighting.
- How it works: LED current set by an external sense resistor; regulates to keep current steady.
- Protections: current limit and thermal protection.
- Package: 8-pin (CDW family).
- Applications: LED indicators, backlighting, flash/torch, automotive lighting.
Note: exact current regulation range, input voltage, LED string voltage limits, and pinout depend on the specific variant. Refer to the TI TLC7135CDW datasheet for precise specs and usage formulas.

TLC7135CDW Features (concise)
- Constant-current LED driver for string backlights; typical output current up to 350 mA
- External resistor (Rset) programs the LED current
- Wide input-voltage range suitable for battery/USB operation (approx 2.7–5.5 V)
- Low dropout/high efficiency for single-cell or low-voltage designs
- Internal current regulation with good line/load accuracy and temperature stability
- Protection features: overcurrent/short-circuit protection and thermal shutdown
- Simple, compact surface-mount package (CDW) for space-constrained applications
- Suitable for driving multiple LEDs in series with a single current source (and easy parallel usage with multiple devices)
Note: For exact electrical parameters (typical current, voltage ranges, accuracy, temps), consult the current TLC7135CDW datasheet.

- Pin count: 8 pins (MSOP-8/SO-8 package).
- Function: TLC7135CDW is a fixed‑current LED driver/regulator (≈350 mA typical) that sources a regulated current through an LED string; the current is set by an external resistor and it includes protection features (short‑circuit/overcurrent).

Manufacturer: Texas Instruments (TI).
TI is a multinational semiconductor company that designs and manufactures analog and mixed-signal ICs, embedded processors, and other semiconductor products for a wide range of electronics markets.

- Constant-current LED driver for single- or multi-LED strings (low- to mid-power)
- LCD/keypad and display backlighting
- Indicator and decorative lighting in consumer electronics
- Portable lighting, flashlights, toys and DIY projects
- Automotive interior/instrument cluster illumination
- Signage and display backlighting
- Any battery-powered application needing stable LED current despite supply variation
Note: Check the datasheet for exact current range and wiring recommendations.

8-pin wide-body surface-mount package: SOIC-8 (the “DW” package, wide SOIC).