Overview
The CAT4002ASD-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, providing two and four matched low dropout current sources, respectively. The CAT4002ASD-GT3 is specifically packaged in a 6-lead SC-70 package and is designed to drive LEDs with high accuracy and efficiency.
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 |
| Quiescent Current (No load, RSET = Float) | 0.2 - 0.5 | mA |
| Shutdown Current (VEN/DIM = 0 V) | 1 μA | |
| LED Current Setting (RSET = 3.0 kΩ) | 25 | mA |
| LED Current Accuracy (1 mA ≤ ILED ≤ 40 mA) | ±1% | |
| LED Channel Matching | ±5% | |
| RSET Pin Regulated Voltage | 0.57 - 0.63 | V |
| Dropout Voltage (90% of nominal LED current) | 50 mV at 20 mA | |
| Thermal Shutdown | 150 °C | |
| Undervoltage Lockout (UVLO) Threshold | 2.0 V | |
| Operating Input Voltage Range | 2.4 to 5.5 | V |
| Ambient Temperature Range | −40 to +85 | °C |
Key Features
- 2 matched low dropout current sources for driving LEDs
- 32 linear dimming levels via 1-wire EZDim interface
- Low dropout driver with 50 mV at 20 mA
- No switching noise
- Shutdown current less than 1 μA
- LED current set by external resistor
- Thermal shutdown protection
- Pb-free, halogen-free/BFR-free, and RoHS compliant
- Available in 6-lead SC-70 and 8-pad UDFN 2 mm x 2 mm packages
Applications
- LCD display backlight
- Digital still cameras
- Cellular phones
- Handheld devices
Q & A
- What is the CAT4002ASD-GT3 used for? The CAT4002ASD-GT3 is used as a constant current LED driver to drive LEDs with high accuracy and efficiency.
- What are the key features of the CAT4002ASD-GT3? Key features include 2 matched low dropout current sources, 32 linear dimming levels, low dropout driver, no switching noise, and thermal shutdown protection.
- How is the LED current set in the CAT4002ASD-GT3? The LED current is set by an external resistor connected between the RSET pin and ground.
- What are the dimming capabilities of the CAT4002ASD-GT3? The device supports 32 linear dimming levels via the 1-wire EZDim interface.
- What is the operating input voltage range of the CAT4002ASD-GT3? The operating input voltage range is from 2.4 V to 5.5 V.
- What is the thermal shutdown temperature of the CAT4002ASD-GT3? The thermal shutdown temperature is 150 °C.
- Is the CAT4002ASD-GT3 RoHS compliant? Yes, the device is Pb-free, halogen-free/BFR-free, and RoHS compliant.
- What are the typical applications of the CAT4002ASD-GT3? Typical applications include LCD display backlight, digital still cameras, cellular phones, and handheld devices.
- How does the EN/DIM pin function in the CAT4002ASD-GT3? The EN/DIM pin enables and disables the device and controls the LED current dimming with 32 different levels.
- What is the quiescent current of the CAT4002ASD-GT3 when no load is applied? The quiescent current is between 0.2 mA and 0.5 mA when no load is applied.
