Overview
The LT3796EFE#TRPBF is a DC/DC controller from Analog Devices Inc., designed to regulate constant-current or constant-voltage outputs. It is particularly suited for driving LEDs and other high-power applications. This controller offers a wide range of features and specifications that make it versatile and reliable in various power management scenarios.
Key Specifications
| Parameter | Min | Typ | Max | Units |
|---|---|---|---|---|
| VIN Minimum Operating Voltage | 6 | V | ||
| VIN Shutdown IQ (EN/UVLO = 0V, PWM = 0V) | 1 | 12 | µA | |
| VIN Operating IQ (Not Switching) | 2.5 | 3 | mA | |
| VREF Voltage | 1.97 | 2.015 | 2.06 | V |
| VREF Pin Line Regulation (6V < VIN < 100V) | 1.5 | m%/V | ||
| SENSE Current Limit Threshold | 100 | 113 | 125 | mV |
| Gate Driver tr (NMOS GATE Driver Output Rise Time, CL = 3300pF) | 20 | ns | ||
| Gate Driver tf (NMOS GATE Driver Output Fall Time, CL = 3300pF) | 18 | ns | ||
| Operating Temperature Range | –40 | 125 | °C |
Key Features
- Constant-current or constant-voltage regulation, ideal for driving LEDs and other high-power devices.
- Wide input voltage range: 6V to 100V.
- High accuracy VREF with line and load regulation.
- Integrated gate drivers with fast rise and fall times.
- Current sense input for control loop, sensing the negative terminal of the current sense resistor.
- Internal 7V clamp to protect the PMOS gate.
- Multiple ground pins and an exposed pad for improved thermal performance.
- Operating temperature range: –40°C to 125°C.
Applications
- LED lighting systems, including high-brightness LED drivers.
- Power supplies requiring constant-current or constant-voltage outputs.
- Battery charging systems where precise current control is necessary.
- Industrial and automotive lighting applications.
- General-purpose DC/DC conversion where high reliability and accuracy are required.
Q & A
- What is the primary function of the LT3796EFE#TRPBF?
The LT3796EFE#TRPBF is a DC/DC controller designed to regulate constant-current or constant-voltage outputs, particularly for driving LEDs.
- What is the input voltage range of the LT3796EFE#TRPBF?
The input voltage range is from 6V to 100V.
- What is the operating temperature range of the LT3796EFE#TRPBF?
The operating temperature range is from –40°C to 125°C.
- How does the LT3796EFE#TRPBF protect the PMOS gate?
The LT3796EFE#TRPBF has an internal 7V clamp to protect the PMOS gate.
- What is the purpose of the ISP and ISN pins?
The ISP and ISN pins are connection points for the positive and negative terminals of the current feedback resistor (RLED), respectively.
- What is the function of the TG pin?
The TG pin is the top gate driver output, which drives a series PMOS device between VISP and (VISP – 7V) if VISP > 7V.
- How many ground pins does the LT3796EFE#TRPBF have?
The LT3796EFE#TRPBF has multiple ground pins, including an exposed pad that must be soldered directly to the ground plane.
- What is the typical shutdown current of the LT3796EFE#TRPBF?
The typical shutdown current (IQ) when EN/UVLO = 0V and PWM = 0V is 12 µA.
- What is the VREF voltage of the LT3796EFE#TRPBF?
The VREF voltage is typically 2.015 V.
- What are some common applications of the LT3796EFE#TRPBF?
Common applications include LED lighting systems, power supplies, battery charging systems, and industrial and automotive lighting.
