L6599DTR Technical Parameters, Working Principle, Characteristics and L6599DTR vs L6599D
18 February 2024
Ⅱ. Technical parameters of L6599DTR
Ⅲ. Working principle of L6599DTR
Ⅴ. What are the characteristics of L6599DTR?
Ⅵ. How does the output current protection of L6599DTR work?
Ⅶ. L6599DTR vs L6599D comparison
The L6599DTR is a double-ended controller manufactured by STMicroelectronics specifically designed for resonant half-bridge topology. In this article, we will introduce it in terms of parameters, characteristics, working principle and applications.
The L6599DTR is a double-ended controller designed for resonant half-bridge topology. It provides fifty percent complementary duty cycle to drive the high-side and low-side switches ON or OFF 180°out-of-phase at exactly the same time. output voltage regulation is achieved by modulating the operating frequency. To ensure soft switching and enable high-frequency operation, the controller inserts a fixed dead time between one switch being off and the other being on. To drive the high-side switches, the IC incorporates a high-voltage floating structure capable of withstanding more than 600V and employs a synchronously-driven, high-voltage DMOS, which replaces the external fast-recovery bootstrap diode. In addition, the IC allows the designer to set the converter's operating frequency range with an external programmable oscillator.
At startup, to prevent uncontrolled inrush currents, the switching frequency starts at a programmable maximum and gradually decays until it reaches a steady-state value determined by the control loop. This frequency offset is nonlinear and is designed to minimize output voltage overshoot. Its duration is also programmable. In addition, it can be forced into controlled-burst mode operation at light loads, thus keeping the converter's input consumption to a minimum. The IC's features include a non-latching activated low-disable input with current hysteresis that can be used for power sequencing or brownout protection. It also provides current sense inputs for overcurrent protection with frequency shift, and delayed shutdown with auto-restart.
Alternatives and equivalents:
• L6599AD
• L6599ATD
• L6599D
• L6699DTR
• L6599DTR is manufactured by STMicroelectronics.
• It belongs to the category of switching controllers.
• Its topology is half bridge.
• Its switching frequency is 500kHz.
• Its installation method is SMD or SMT.
• Its length is 10 mm and height is 1.65 mm.
• It dissipates 830 mW of power.
• It has 16 pins and comes in SOIC-16 package and tape and reel packaging.
• The soft switching controller has a maximum duty cycle of 52 percent.
• The device operates from a minimum supply voltage of 8.85 V and a maximum supply voltage of 16 V.
• This soft switching controller has a minimum operating temperature of -40°C and a maximum of 150°C.
The L6599DTR regulates the power switches in the half-bridge topology by means of PWM control. The period of the PWM signal determines the operating frequency of the switches, while the duty cycle determines the on-time and off-time of the switches. By adjusting the duty cycle of the PWM signal, it can control the magnitude of the output voltage. To ensure the stable operation of the system, the L6599DTR integrates an intelligent deadband control circuit internally, which is used to avoid short-circuit problems caused by simultaneous conduction of power switches. The deadband control mechanism ensures that when one switch is turned off, the other switch will have enough time delay before it is turned on, thus effectively avoiding current conflict and safeguarding the safety of the system. In addition, the chip contains a resonant frequency control circuit, which can dynamically adjust the resonant frequency according to the operating conditions. This helps optimize system performance and stability. In addition, the chip contains a feedback mechanism, which can adjust the duty cycle of the PWM signal by comparing it with the voltage at the output to maintain the output voltage near the set value. This feedback mechanism helps to achieve a stable output voltage.
• This is a high precision oscillator.
• Latched disable input
• lnterface with PFC controller
• Burst-mode operation at light load
• It operates at frequencies up to 500 kHz.
• Two-level OCP: frequency-shift and latched shutdown
• Input for power-ON/OFF sequencing or brownout protection
• Non-linear soft-start for monotonic output voltage rise
• 50 percent duty cycle, variable frequency control of resonant half-bridge
• -300/800 mA high-side and low-side gate drivers with UVLO pull-down
• 600 V-rail compatible high-side gate driver with integrated bootstrap diode and high dV/dt immunity
The output current protection of the L6599DTR is realized by its internal OCP (Over Current Protection) circuit. When the output current exceeds the preset limit value, the OCP circuit triggers the protection mechanism to turn off the high side and low side switches to prevent the overload current from damaging the power supply. Once the OCP is activated, the L6599DTR intelligently enters a stall state, suspending all operations and waiting for subsequent commands. At this point, the power supply system is equipped with an automatic restart function, or the user can manually place the power supply in shutdown mode by disabling the latching input. This flexible control provides users with more options and room for maneuver. In addition, the L6599DTR offers frequency shift and latching shutdown functions. These two functions play a vital role in minimizing the scope of fault impact, especially in the event of a serious fault, they can quickly and decisively shut down the power supply, effectively preventing the scope of the fault from expanding. These protective features enable the L6599DTR to ensure the safe and stable operation of the power supply.
The differences between the L6599DTR and the L6599D are shown below.
• Lighting driver: The L6599DTR is suitable for implementation in LED drivers and various lighting applications, enabling efficient conversion and dimming control within LED lighting systems through the adjustment of control parameters and peripheral circuit design. At the same time, it can increase power conversion efficiency to the highest level and effectively reduce energy waste.
• Switching mode power supplies (SMPS): The L6599DTR can be used to design various types of SMPS, including offline and DC-DC applications. It integrates overcurrent protection, overvoltage protection and undervoltage protection circuits, which can effectively prevent the power system from being damaged due to abnormal conditions. At the same time, L6599DTR also has a precise feedback mechanism that adjusts the duty cycle of the PWM signal in real time by comparing it with the voltage at the output terminal to ensure that the output voltage is always maintained near the set value. This closed-loop feedback control not only improves the stability of the power supply output, but also helps reduce the fluctuation of the output voltage, making the power supply system more reliable.
• Power adapter: In power adapters such as notebook computers and mobile phone chargers, L6599DTR can be used to achieve efficient power conversion and stable output voltage. Its design flexibility and adjustability make it suitable for adapter designs across a wide range of power ranges and output requirements. L6599DTR can adopt a variety of different input voltage and output voltage configurations, and its output voltage accuracy is adjustable, thus meeting users' different voltage and power needs.
• Motor drive: In industrial and automotive motor drive systems, the L6599DTR is a new motor driver with a wide range of applications. Compared with traditional motor driving methods, the advantages of L6599DTR are that it is efficient, flexible and easy to control. By controlling the switching frequency and duty cycle of the motor driver, it can achieve efficient control and speed regulation of the motor.
• Inverter: In applications such as solar inverters and variable frequency air conditioners, L6599DTR can be used as an inverter controller. Among solar inverters, L6599DTR, through its advanced PWM control technology, can accurately manage the DC power generated by solar panels and convert it into AC power for home or industrial use. Its efficient energy conversion capability ensures efficient utilization of solar energy while reducing energy loss during the conversion process. In inverter air conditioners, L6599DTR also plays an important role. Inverter air conditioners adjust the cooling or heating effect by changing the speed of the motor, and the L6599DTR can accurately control the speed of the motor to achieve efficient energy conversion and frequency adjustment.
Frequently Asked Questions
1. What is the operating temperature range of L6599DTR?
The operating temperature of L6599DTR ranges from -40°C to 150°C.
2. What is L6599DTR?
L6599DTR is a specific type of IC (integrated circuit) commonly used in power factor correction (PFC) applications.
3. What is the replacement and equivalent of L6599DTR?
You can replace the L6599DTR with L6599AD, L6599ATD, L6599ATDTR, L6599D, L6699DTR or NCP1396ADR2G.
4. Can you explain how L6599DTR achieves power factor correction?
L6599DTR achieves power factor correction by controlling the timing and shaping of the current drawn from the AC mains, ensuring it aligns better with the input voltage waveform, thus improving the power factor.
