The CAT4008 is a constant current LED driver manufactured by Catalyst Semiconductor. It is designed to drive up to eight LEDs with independently adjustable current. The CAT4008 uses an I2C interface to control the current for each LED, making it suitable for applications requiring precise and dynamic LED brightness control. This device is marked as END-OF-LIFE.
Applications
- LED displays: Backlighting for LCD screens, LED matrices, and other display applications.
- Indicator lights: Driving indicator LEDs in industrial equipment, consumer electronics, and automotive applications.
- Mood lighting: Creating dynamic lighting effects in architectural and decorative lighting systems.
- Automotive lighting: Interior and exterior lighting control in automotive applications.
- Portable devices: Driving LEDs in handheld devices such as cell phones and MP3 players.
Features
- 8-channel constant current LED driver: Drives up to eight LEDs with independent current control.
- I2C interface: Allows for easy control of LED current levels via I2C communication.
- Individual current adjustment: Each LED channel can be programmed with a different current level.
- Wide voltage range: Operates over a wide input voltage range (e.g., 3V to 5.5V).
- Built-in thermal shutdown: Protects the device from overheating.
- PWM dimming control: Supports PWM dimming for precise brightness control.
Benefits
- Precise LED current control: Ensures consistent brightness and color across all LEDs.
- Flexible dimming capabilities: Allows for dynamic adjustment of LED brightness.
- Easy to use: Simple I2C interface simplifies system design and control.
- Reliable operation: Built-in protection features ensure reliable performance.
- Compact size: Small package options allow for use in space-constrained applications.
- Cost-effective: Offers a cost-effective solution for multi-channel LED driving.
Additional Details
The CAT4008 features an I2C interface consisting of a serial data line (SDA) and a serial clock line (SCL). The device supports both standard (100 kHz) and fast (400 kHz) I2C communication modes. Each LED channel can be programmed with a current level ranging from a few milliamps up to 25mA or more, depending on the specific device version. The CAT4008 also includes a built-in thermal shutdown feature that protects the device from overheating in case of excessive power dissipation. Because it is END-OF-LIFE, consider modern LED driver ICs with similar or improved features for new designs.
