Overview
The LT8376RV#PBF is a monolithic, synchronous step-down DC/DC converter designed by Analog Devices Inc. This integrated circuit is specifically tailored for driving LED strings and offers advanced features such as PWM dimming and silent switcher technology. The device operates with a fixed-frequency, peak current control mechanism and supports a wide input voltage range of 3.6V to 60V. It is particularly suited for applications requiring high efficiency and low electromagnetic interference (EMI).
Key Specifications
| Parameter | Min | Typ | Max | Units |
|---|---|---|---|---|
| Input Voltage Range | 3.6 | - | 60 | V |
| Output Current | - | - | 3A | A |
| Switching Frequency | 200kHz | - | 2MHz | Hz |
| EN/UVLO Threshold (Falling) | 1.17 | 1.21 | 1.25 | V |
| EN/UVLO Rising Hysteresis | - | - | 40mV | mV |
| Operating Junction Temperature Range | -40°C | - | 150°C | °C |
| Package Type | - | - | 28-LQFN (4mm × 5mm × 0.94mm) | - |
Key Features
- PWM Dimming: Supports PWM dimming with a 128:1 PWM ratio and an 86Hz PWM frequency.
- Silent Switcher Technology: Reduces EMI through optional spread spectrum frequency modulation, varying the frequency from 100% to 125% of the set frequency.
- Programmable Switching Frequency: The switching frequency can be programmed from 200kHz to 2MHz using an external resistor or an external clock.
- High-Side PMOS Driver: Includes a driver for an external high-side PMOS for PWM dimming.
- Internal PWM Signal Generator: Provides analog control of PWM dimming when an external signal is not available).
Applications
- LED Lighting Systems: Ideal for driving LED strings in various lighting applications, including automotive, industrial, and commercial lighting systems).
- Power Supply Systems: Suitable for use in power supply systems requiring high efficiency and low EMI).
- Automotive Electronics: Can be used in automotive electronics where robust and efficient power management is crucial).
Q & A
- What is the input voltage range of the LT8376RV#PBF?
The input voltage range is from 3.6V to 60V).
- What is the maximum output current of the LT8376RV#PBF?
The maximum output current is 3A).
- How can the switching frequency be adjusted?
The switching frequency can be programmed from 200kHz to 2MHz using an external resistor or an external clock).
- Does the LT8376RV#PBF support PWM dimming?
Yes, it supports PWM dimming with a 128:1 PWM ratio and an 86Hz PWM frequency).
- What is the operating junction temperature range of the LT8376RV#PBF?
The operating junction temperature range is from -40°C to 150°C).
- What package type does the LT8376RV#PBF come in?
The device comes in a 28-LQFN (4mm × 5mm × 0.94mm) package).
- Is the LT8376RV#PBF RoHS and WEEE compliant?
Yes, parts ending with PBF are RoHS and WEEE compliant).
- What is the purpose of the silent switcher technology in the LT8376RV#PBF?
The silent switcher technology reduces EMI through optional spread spectrum frequency modulation).
- Can the LT8376RV#PBF be used in automotive applications?
Yes, it can be used in automotive electronics where robust and efficient power management is crucial).
- How is the LED current programmed in the LT8376RV#PBF?
The LED current is programmed by an analog voltage or the duty cycle of pulses at the CTRL pin).
