Overview
The L6382D5TR, produced by STMicroelectronics, is a power management unit designed for microcontrolled electronic ballasts. It integrates a power factor correction (PFC) stage and a half-bridge stage, making it suitable for both dimmable and non-dimmable ballast applications. This IC is built using high-voltage BCD off-line technology and features advanced power management logic to minimize power losses and enhance application reliability.
Key Specifications
| Parameter | Min | Typ | Max | Unit |
|---|---|---|---|---|
| IC Supply Voltage (VCC) | 8.5 | 13 | 15 | V |
| High Voltage Start-Up Generator Voltage (VHVSU) | -0.3 | - | 600 | V |
| Operating Frequency | 15 | - | 400 | KHz |
| Reference Voltage (VREF) | 4.9 | 5 | 5.1 | V |
| Quiescent Current in Operating Mode | - | 2.1 | - | mA |
| Maximum Thermal Resistance Junction-Ambient | - | 120 | - | °C/W |
| Storage Temperature | -40 | - | 150 | °C |
| Ambient Temperature Operating Range | -40 | - | 125 | °C |
Key Features
- Integrated high-voltage start-up generator
- Four drivers for PFC, half-bridge, and pre-heating MOSFETs
- Fully integrated power management for all operating modes
- 5V microcontroller compatible with internal two-point VCC regulator
- Over-current protection with digital output signal and cross-conduction protection (interlocking)
- Under voltage lock-out and integrated bootstrap diode
- Precise reference voltage (+5V ±2%) capable of supplying up to 30mA
- Advanced power management logic to minimize power losses and increase application reliability
Applications
The L6382D5TR is primarily used in microcontrolled electronic ballasts, including both dimmable and non-dimmable ballast applications. It is designed to support various lamp wattages and types by adjusting the microcontroller software, making it versatile for different lighting systems.
Q & A
- What is the primary function of the L6382D5TR?
The L6382D5TR is a power management unit designed for microcontrolled electronic ballasts, integrating PFC and half-bridge stages.
- What technology is used to build the L6382D5TR?
The L6382D5TR is built using high-voltage BCD off-line technology.
- What are the key drivers included in the L6382D5TR?
The IC includes drivers for the PFC pre-regulator stage, two drivers for the ballast half-bridge stage, and a driver for preheating filaments.
- What is the role of the high-voltage start-up generator?
The high-voltage start-up generator charges the capacitor connected between VCC and GND to start up the IC and is cycled on-off between turn-on and save mode voltages.
- What is the purpose of the internal two-point VCC regulator?
The internal two-point VCC regulator provides a stable supply voltage for the signal part of the IC and the drivers.
- How does the over-current protection work?
The over-current protection is enabled during operating mode and triggers a digital output signal when the current exceeds the internal threshold, disabling the half-bridge drivers.
- What is the significance of the integrated bootstrap diode?
The integrated bootstrap diode replaces the external bootstrap diode, improving the efficiency and reliability of the high-side gate-drive.
- What is the range of the reference voltage provided by the L6382D5TR?
The reference voltage is +5V ±2%, capable of supplying up to 30mA.
- What are the operating temperature ranges for the L6382D5TR?
The ambient temperature operating range is -40°C to +125°C, and the storage temperature range is -40°C to +150°C.
- How does the L6382D5TR support different lamp wattages and types?
The L6382D5TR allows designers to use the same ballast circuit for different lamp wattages and types by simply changing the microcontroller software.
