Overview
The CAT4002ATD-GT3 is a constant current LED driver produced by onsemi. This device is part of the CAT400XA series, which includes the CAT4002A and CAT4004A models. The CAT4002ATD-GT3 specifically provides two matched low dropout current sources to drive LEDs, making it suitable for various LED lighting applications. It features a compact design, available in the SC-70-6 package, and supports a wide range of LED forward voltages while maintaining tight current matching.
Key Specifications
| Parameter | Rating/Value | Unit |
|---|---|---|
| VIN, LEDx, RSET | 6 | V |
| EN/DIM Voltage | 6 | V |
| Storage Temperature Range | −65 to +160 | °C |
| Junction Temperature Range | −40 to +125 | °C |
| Lead Temperature | 300 | °C |
| Operating Input Voltage Range | 2.4 to 5.5 | V |
| Ambient Temperature Range | −40 to +85 | °C |
| LED Current per Pin | 0 to 40 | mA |
| Undervoltage Lockout (UVLO) Threshold | 2.0 | V |
| Thermal Shutdown | 150 | °C |
| Thermal Hysteresis | 20 | °C |
Key Features
- 2 matched low dropout current sources for driving LEDs
- 32 linear dimming levels via the EN/DIM one-wire interface
- Low dropout voltage of 50 mV at 20 mA
- No switching noise
- Shutdown current less than 1 μA
- LED current set by an external resistor (RSET)
- Thermal shutdown protection
- Available in SC-70-6 and UDFN-8 (2 mm x 2 mm) packages
- Pb-free, halogen-free, and RoHS compliant
Applications
- LCD display backlight
- Digital still cameras
- Cellular phones
- Handheld devices
Q & A
- What is the CAT4002ATD-GT3 used for? The CAT4002ATD-GT3 is used as a constant current LED driver to drive LEDs in various applications.
- How many LED channels does the CAT4002ATD-GT3 support? The CAT4002ATD-GT3 supports two LED channels.
- What is the operating input voltage range of the CAT4002ATD-GT3? The operating input voltage range is from 2.4 V to 5.5 V.
- How is the LED current set in the CAT4002ATD-GT3? The LED current is set by an external resistor (RSET) connected between the RSET pin and ground.
- What is the thermal shutdown temperature of the CAT4002ATD-GT3? The thermal shutdown temperature is 150 °C.
- Does the CAT4002ATD-GT3 support dimming? Yes, it supports 32 linear dimming levels via the EN/DIM one-wire interface.
- What are the package options for the CAT4002ATD-GT3? It is available in SC-70-6 and UDFN-8 (2 mm x 2 mm) packages.
- Is the CAT4002ATD-GT3 RoHS compliant? Yes, it is Pb-free, halogen-free, and RoHS compliant.
- What is the maximum LED current per pin for the CAT4002ATD-GT3? The maximum LED current per pin is 40 mA.
- How does the CAT4002ATD-GT3 handle thermal issues? It features thermal shutdown protection and thermal hysteresis to manage thermal issues.
