Overview
The CAT4101TV-T75 is a 1 A constant-current LED driver produced by onsemi. This device is designed to drive high-brightness LEDs with high accuracy and efficiency. It features a low dropout voltage of 0.5 V at full load, ensuring minimal power loss. The CAT4101TV-T75 operates without the need for an inductor, reducing the overall component count and noise in the system. The LED current is set by an external resistor connected to the RSET pin, allowing for flexible current adjustment. The device supports PWM dimming and has a thermal shutdown protection mechanism to prevent overheating.
Key Specifications
| Parameter | Rating | Units |
|---|---|---|
| VIN Voltage | 3.0 to 5.5 | V |
| LED Pin Voltage | Up to 25 | V |
| LED Pin Current | Up to 1 A | A |
| Dropout Voltage | 500 mV at 1 A | mV |
| RSET Pin Voltage | 1.17 to 1.23 | V |
| Quiescent Current | 0.8 mA (No LED, RSET = Floating) | mA |
| Thermal Shutdown | 150°C | °C |
| Thermal Hysteresis | 20°C | °C |
| Undervoltage Lockout (UVLO) Threshold | 2.0 V | V |
Key Features
- Accurate 1 A current sink
- Up to 25 V operation on LED pin
- Low dropout voltage of 500 mV at 1 A
- LED current set by external resistor
- High resolution PWM dimming via EN/PWM pin
- 'Zero' current shutdown mode
- Thermal shutdown protection
- TO-263 (D2PAK) 5-lead package
- Pb-free, halogen-free/BFR-free, and RoHS compliant
Applications
- High power LED lighting up to 1 A
- Architectural and general lighting
- Automotive lighting
Q & A
- What is the maximum current the CAT4101TV-T75 can drive?
The CAT4101TV-T75 can drive up to 1 A of current.
- What is the maximum voltage the LED pin can handle?
The LED pin can handle up to 25 V.
- How is the LED current set in the CAT4101TV-T75?
The LED current is set by an external resistor connected to the RSET pin.
- Does the CAT4101TV-T75 support PWM dimming?
Yes, the CAT4101TV-T75 supports high resolution PWM dimming via the EN/PWM pin.
- What is the thermal shutdown temperature of the CAT4101TV-T75?
The thermal shutdown temperature is 150°C.
- What package type is the CAT4101TV-T75 available in?
The CAT4101TV-T75 is available in a TO-263 (D2PAK) 5-lead package.
- Is the CAT4101TV-T75 RoHS compliant?
Yes, the CAT4101TV-T75 is Pb-free, halogen-free/BFR-free, and RoHS compliant.
- How does the undervoltage lockout (UVLO) work in the CAT4101TV-T75?
The device disables the LED channel if the input supply falls below the UVLO threshold of 2.0 V.
- Can multiple CAT4101TV-T75 devices be connected in parallel for higher current applications?
Yes, multiple devices can be connected in parallel to achieve higher current levels.
- What is the recommended layout for thermal dissipation of the CAT4101TV-T75?
The board layout should provide good thermal dissipation through the PCB, with the tab of the CAT4101 soldered down to the PCB and connected to a large ground plane.
