Overview
The L6574D, produced by STMicroelectronics, is a CFL/TL ballast driver designed to drive two power MOSFETS in a classical half-bridge topology. This device is manufactured using BCD OFF LINE technology, making it suitable for applications requiring voltage ratings in excess of 600V, particularly in lamp ballast applications. The L6574D includes a dedicated timing section for preheat and ignition of the lamp, as well as an OP AMP for closed-loop control of the lamp current during normal operation. It also features an integrated bootstrap section, eliminating the need for a bootstrap diode and zener clamping on Vs, which is beneficial for low-cost, high-performance ballast designs.
Key Specifications
| Parameter | Value |
|---|---|
| Package | SO-16, PDIP 16 |
| Marketing Status | Active (L6574D), Not Recommended for New Design (L6574) |
| Grade | Industrial |
| RoHS Compliance Grade | Ecopack2 |
| High Voltage Rail | Up to 600V |
| Driver Current Capability | 250mA Source, 450mA Sink |
| dV/dt Immunity | ± 50 V/ns in full temperature range |
| Switching Times | 80/40ns Rise/Fall |
| Operating Temperature (°C) | -40 to 150 |
Key Features
- High accuracy current controlled oscillator
- Sense OP AMP for closed-loop control or protection features
- Clamping on Vs
- Integrated bootstrap diode
- Under voltage lock out
- CMOS shut down input
- Preheat and frequency shifting timing
- High dV/dt immunity
Applications
The L6574D is primarily used in fluorescent and tubular lamp ballast applications. It is designed to ensure proper control and driving of the lamp, including preheat, ignition, and stable operation. The device's features make it suitable for various lighting systems where high voltage and precise current control are necessary.
Q & A
- What is the primary function of the L6574D?
The L6574D is a CFL/TL ballast driver designed to drive two power MOSFETS in a half-bridge topology for fluorescent and tubular lamp applications. - What technology is used in the manufacture of the L6574D?
The L6574D is manufactured using BCD OFF LINE technology. - What are the key features of the L6574D's timing section?
The timing section allows for setting parameters for proper preheat and ignition of the lamp, as well as frequency shifting timing. - Does the L6574D include an integrated bootstrap section?
Yes, the L6574D includes an integrated bootstrap section, eliminating the need for a bootstrap diode and zener clamping on Vs. - What are the package options for the L6574D?
The L6574D is available in SO-16 and PDIP 16 packages. - What is the high voltage rail capability of the L6574D?
The L6574D can handle high voltage rails up to 600V. - What is the driver current capability of the L6574D?
The L6574D has a driver current capability of 250mA source and 450mA sink. - What is the dV/dt immunity of the L6574D?
The L6574D has a dV/dt immunity of ± 50 V/ns in the full temperature range. - What are the switching times of the L6574D?
The switching times are 80/40ns rise/fall. - What is the operating temperature range of the L6574D?
The operating temperature range is -40 to 150°C.
