Overview
The L6599ADTR, produced by STMicroelectronics, is an improved high-voltage resonant controller designed for series-resonant half-bridge topology. It is an enhanced version of the previous L6599 controller, offering several key improvements. The device operates with a 50% complementary duty cycle, where the high-side and low-side switches are driven ON/OFF 180° out-of-phase for exactly the same time. This configuration ensures soft-switching and enables high-frequency operation up to 500 kHz. The controller is particularly useful in applications requiring high efficiency and reliability.
Key Specifications
| Parameter | Value | Unit |
|---|---|---|
| Package Style | SO-16N | |
| Mounting Method | Surface Mount | |
| Operating Frequency | Up to 500 kHz | |
| High-Side Gate Driver | 600 V-rail compatible with integrated bootstrap diode | |
| Gate Driver Current | -300/800 mA | |
| UVLO Pull-Down | Yes | |
| Junction Operating Temperature Range | -40 to 150 °C | |
| Storage Temperature Range | -55 to 150 °C | |
| Max. Thermal Resistance (SO16) | 120 °C/W | |
| Recommended Max. Power Dissipation @TA = 50 °C (SO16) | 0.83 W |
Key Features
- 50% duty cycle, variable frequency control of resonant half bridge
- High-accuracy oscillator
- Up to 500 kHz operating frequency
- Two-level OCP: frequency-shift and latched shutdown
- Interface with PFC controller
- Latched disable input
- Burst mode operation at light load
- Input for power-ON/OFF sequencing or brownout protection
- 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
- -300/800 mA high-side and low-side gate drivers with UVLO pull-down
Applications
- LCD and PDP TV
- Desktop PC, entry-level server
- Telecom SMPS
- High efficiency industrial SMPS
- AC-DC adapter, 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 high-side and low-side switches?
The duty cycle is 50%, with the switches driven ON/OFF 180° out-of-phase for exactly the same time.
- What type of protection does the L6599ADTR offer against overcurrent?
The L6599ADTR offers two-level OCP: frequency-shift and latched shutdown.
- Does the L6599ADTR support burst mode operation?
Yes, it supports burst mode operation at light load.
- What is the voltage rating of the high-side gate driver?
The high-side gate driver is 600 V-rail compatible with an integrated bootstrap diode.
- What are the typical applications of the L6599ADTR?
Typical applications include LCD and PDP TV, desktop PC, entry-level server, telecom SMPS, high efficiency industrial SMPS, and AC-DC adapters.
- What is the junction operating temperature range of the L6599ADTR?
The junction operating temperature range is -40 to 150 °C.
- Does the L6599ADTR have an interface with PFC controllers?
Yes, it has an interface with PFC controllers.
- What is the maximum thermal resistance for the SO16 package?
The maximum thermal resistance for the SO16 package is 120 °C/W.
- What is the recommended maximum power dissipation at TA = 50 °C for the SO16 package?
The recommended maximum power dissipation at TA = 50 °C for the SO16 package is 0.83 W.
