Overview
The CAT4104VP2-GT3 is a quad-channel constant current LED driver produced by onsemi. This device is designed to drive high-brightness LED strings with each channel capable of sinking up to 175 mA of current. The LED current is set by an external resistor connected to the RSET pin, allowing for flexible current adjustment. The CAT4104VP2-GT3 supports high voltage operation on the LED pins up to 25 V, making it suitable for applications involving long strings of LEDs. The device features thermal shutdown protection, low dropout current sources, and high-frequency PWM dimming capabilities.
Key Specifications
| Parameter | Rating | Unit |
|---|---|---|
| VIN, RSET, EN/PWM Voltages | −0.3 to 6 V | V |
| LED1, LED2, LED3, LED4 Voltages | −0.3 to 25 V | V |
| Storage Temperature Range | −65 to +160 °C | °C |
| Junction Temperature Range | −40 to +150 °C | °C |
| Lead Temperature | 300 °C | °C |
| VIN Operating Voltage | 3.0 to 5.5 V | V |
| Ambient Temperature Range | −40 to +85 °C | °C |
| ILED per LED pin | 10 to 175 mA | mA |
| LED Current Accuracy | ±2 % | % |
| LED Channel Matching | −5 to +5 % | % |
| Dropout Voltage | 400 mV at 175 mA | mV |
| RSET Pin Voltage | 1.17 to 1.23 V | V |
| Quiescent Current | 0.6 to 6 mA | mA |
| Thermal Shutdown | 150 °C | °C |
| Thermal Hysteresis | 20 °C | °C |
Key Features
- Four matched low dropout current sinks up to 175 mA per channel
- Up to 25 V operation on LED pins, supporting long strings of LEDs
- LED current set by an external resistor connected to the RSET pin
- High-frequency PWM dimming via the EN/PWM pin
- 'Zero' current shutdown mode
- Thermal shutdown protection at 150 °C
- Available in TDFN 8-pad 2 x 3 mm and SOIC 8-lead packages
- Pb-free, halogen-free/BFR-free, and RoHS compliant
Applications
- Automotive lighting
- General and architectural lighting
- LCD backlighting
- Automatic light sensor applications (e.g., daylight detection, nightlight detection)
Q & A
- What is the maximum current each channel of the CAT4104VP2-GT3 can sink?
Each channel can sink up to 175 mA of current.
- How is the LED current set in the CAT4104VP2-GT3?
The LED current is set by an external resistor connected to the RSET pin.
- What is the maximum voltage the LED pins can handle?
The LED pins can handle up to 25 V.
- Does the CAT4104VP2-GT3 support PWM dimming?
- What is the thermal shutdown temperature of the CAT4104VP2-GT3?
The device shuts down at a junction temperature of 150 °C.
- In what packages is the CAT4104VP2-GT3 available?
It is available in TDFN 8-pad 2 x 3 mm and SOIC 8-lead packages.
- Is the CAT4104VP2-GT3 RoHS compliant?
- What are some common applications of the CAT4104VP2-GT3?
Automotive lighting, general and architectural lighting, LCD backlighting, and automatic light sensor applications.
- How does the EN/PWM pin function?
The EN/PWM pin enables and disables the device and also controls PWM dimming.
- What happens when the EN/PWM pin is held low for 4 ms?
The device enters a 'zero current' shutdown mode.
