Overview
The L6599ADTR is an improved high-voltage resonant controller from STMicroelectronics, designed for series-resonant half bridge topology. This IC is a revision of the previous L6599 model, offering enhanced features and protections. It provides a 50% complementary duty cycle, ensuring that the high-side and low-side switches are driven ON/OFF 180° out-of-phase for exactly the same time. The controller regulates the output voltage by modulating the operating frequency, which can go up to 500 kHz. It is particularly useful in applications requiring high efficiency and robust protection mechanisms.
Key Specifications
| Parameter | Value | Unit |
|---|---|---|
| Operating Frequency | Up to 500 kHz | |
| Duty Cycle | 50% complementary | |
| IC Supply Voltage (Vcc) | 8.85 - 16 V | V |
| Junction Temperature Range | -40 to 150 °C | °C |
| Storage Temperature Range | -55 to 150 °C | °C |
| Thermal Resistance (Junction to Ambient) | 120 °C/W (SO16) | °C/W |
| Package Type | SO16N | |
| Gate Drive Current (High-Side/Low-Side) | -300/800 mA | mA |
Key Features
- High-accuracy oscillator with up to 500 kHz operating frequency
- 50% duty cycle, variable frequency control of resonant half bridge
- Two-level Overcurrent Protection (OCP): frequency-shift and latched shutdown
- Interface with PFC controller for fault conditions and burst mode operation
- Latched disable input for OTP and/or OVP implementation
- Burst mode operation at light load
- Non-linear soft-start for monotonic output voltage rise
- 600 V-rail compatible high-side gate driver with integrated bootstrap diode and high dv/dt immunity
- UVLO pull-down for high-side and low-side gate drivers
Applications
- LCD and PDP TV power supplies
- Desktop PC and entry-level server power supplies
- Telecom SMPS (Switch-Mode Power Supplies)
- High efficiency industrial SMPS
- AC-DC adapters and open frame SMPS
Q & A
- What is the operating frequency range of the L6599ADTR?
The L6599ADTR operates up to 500 kHz.
- What is the duty cycle of the L6599ADTR?
The duty cycle is 50% complementary.
- What are the key protection features of the L6599ADTR?
The IC includes two-level OCP (frequency-shift and latched shutdown), latched disable input, and interface with PFC controller for fault conditions.
- What is the junction temperature range of the L6599ADTR?
The junction temperature range is -40 to 150 °C.
- What package types are available for the L6599ADTR?
The L6599ADTR is available in SO16N package.
- What are the typical applications of the L6599ADTR?
Typical applications include LCD and PDP TV power supplies, desktop PC and entry-level server power supplies, telecom SMPS, high efficiency industrial SMPS, and AC-DC adapters.
- How does the L6599ADTR regulate output voltage?
The output voltage is regulated by modulating the operating frequency.
- Does the L6599ADTR support burst mode operation?
- What is the thermal resistance of the SO16N package?
The thermal resistance (junction to ambient) for the SO16N package is 120 °C/W.
- What are the gate drive current capabilities of the L6599ADTR?
The gate drive current is -300/800 mA for high-side and low-side drivers, respectively.
