LED driver IC – Hamtech Electronics Technologies https://hamtechtechnologies.com Sun, 21 Jun 2026 07:51:14 +0000 en-US hourly 1 https://wordpress.org/?v=7.0.3 https://hamtechtechnologies.com/wp-content/uploads/2025/11/h-100x100.webp LED driver IC – Hamtech Electronics Technologies https://hamtechtechnologies.com 32 32 ULN2003 Darlington Driver IC https://hamtechtechnologies.com/product/uln2003-darlington-driver-ic/ https://hamtechtechnologies.com/product/uln2003-darlington-driver-ic/#respond Thu, 20 Nov 2025 03:28:24 +0000 https://hamtechtechnologies.com/?post_type=product&p=272 The ULN2003 is a versatile 7-channel NPN Darlington transistor array designed to interface microcontrollers—such as Arduino, ESP32, ESP8266, and Raspberry Pi—with high-current and high-voltage loads. Each of the seven channels can sink up to 500mA, making it suitable for driving relays, indicators, lamps, solenoids, and especially stepper motors such as the 28BYJ-48.

The IC includes integrated flyback diodes, offering built-in protection when switching inductive loads. It accepts both 3.3V and 5V logic, making it perfect for modern embedded systems. The ULN2003 is widely used in automation systems, robotics, vending machines, automotive projects, and industrial control circuits.

Key Features:

  • 7-channel NPN Darlington driver

  • Up to 500mA current sinking per channel

  • Handles load voltages up to 50V

  • Built-in freewheeling diodes for inductive protection

  • Compatible with 3.3V/5V logic

  • Ideal for stepper motors, relays, solenoids, LED drivers

  • Companion to shift registers (74HC595) and microcontrollers

]]> https://hamtechtechnologies.com/product/uln2003-darlington-driver-ic/feed/ 0 UDN2981 High-Side Driver https://hamtechtechnologies.com/product/268/ https://hamtechtechnologies.com/product/268/#respond Thu, 20 Nov 2025 03:17:39 +0000 https://hamtechtechnologies.com/?post_type=product&p=268 The UDN2981 is an 8-channel source driver IC commonly used to interface low-voltage logic systems (Arduino, ESP32, Raspberry Pi) with higher-voltage loads such as LED arrays, relays, lamps, small motors, and solenoids.

Each channel can source up to 500mA peak current, allowing safe control of demanding loads. The chip includes built-in clamp diodes for switching inductive loads, reducing the need for external protection circuitry.

Unlike typical low-side drivers like ULN2803, the UDN2981 is a high-side driver, meaning it switches the positive voltage line — ideal for powering common-cathode LED matrices and displays.

Key Features:

  • 8-channel high-side driver

  • Handles up to 50V output

  • Up to 500mA peak current per channel

  • Built-in output clamp diodes for inductive loads

  • Compatible with TTL and CMOS logic

  • Perfect for LED matrices, displays, relays, solenoids, and high-voltage loads

  • Drop-in alternative: TD62783, MIC2981

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