Overview of chip UCC2807DTR-2
UCC2807DTR-2 is a high-performance power factor correction (PFC) controller, which is widely used in the field of power management, especially in situations where it is necessary to improve the input power factor and reduce power harmonics. Its design purpose is to meet the increasingly stringent requirements of electrical regulations, and improve the effectiveness of the whole system through efficient power conversion. UCC2807DTR-2 is mainly used for switching power supply, LED drive power supply and other applications, providing excellent performance and reliability.
In this chip, advanced control technology and architecture are adopted to enable it to adjust the output voltage and current efficiently and stably, and keep them within the preset range. Its internal integrated functions include current detection, soft start, overvoltage and overtemperature protection, etc., to ensure safety and stability under various working conditions. In order to meet the requirements of inverter or various loads, UCC2807DTR-2 can set different control parameters according to the external circuit to achieve the best operation effect.
Detailed parameters of chip UCC2807DTR-2
The following are some main technical parameters of UCC2807DTR-2:
-Operating voltage range: 4.5V to 35V -Reference voltage: 2.5V -Control current: up to 500 μ A -Frequency range: 100kHz to 200kHz, adjustable -Input current offset: 500 μ A -Maximum starting current: 250 μ A -Input offset voltage: ± 1.5mV -Temperature range: - 40 ° C to 125 ° C -Package type: TSSOP-16
These parameters show that UCC2807DTR-2 has the ability to work at high temperature and in a wide voltage range, and is suitable for a variety of complex power supply structures and application scenarios.
Manufacturer, packaging and packaging of chip UCC2807DTR-2
UCC2807DTR-2 is produced by Texas Instruments. The company is famous for its high-quality analog integrated circuits and digital signal processing units. UCC2807DTR-2 adopts TSSOP package on the package, which makes it more compact in size and suitable for applications with limited space. The 16 pin design provides a wealth of connection options for the integration of external circuits.
Description of pin and circuit diagram of chip UCC2807DTR-2
The pin distribution of UCC2807DTR-2 is as follows:
1. COMP (pin 1): used to compensate network connection and adjust gain characteristics. 2. VREF (pin 2): output reference voltage for external circuit. 3. CSN (Pin 3): current detection pin, connected to the current sensor output. 4. CSP (Pin 4): current detection pin, connected to positive current sensor output. 5. RT (Pin 5): frequency setting, used to adjust pulse width modulation (PWM) frequency. 6. GND (pin 6): ground pin, return path of the circuit. 7. VCC (Pin 7): power supply pin, connected to the main power supply. 8. OUT (pin 8): PWM output to switching elements (such as MOSFET). 9. OC (pin 9): over-current protection pin to monitor abnormal current in the system. 10. START (pin 10): start the control pin to complete the soft start process. 11. SLOPE (pin 11): Connect slope compensation capacitor to improve system stability. 12. ISET (pin 12): Set current for current limitation and adjustment. 13. FMIN (pin 13): minimum frequency setting to ensure the stability of the system under low load. 14. COMP 2 (pin 14): spare compensation pin, increasing design flexibility. 15. BYPASS (pin 15): power bypass pin to improve the suppression of power noise. 16. SENSE (pin 16): input voltage detection pin.
Through this pin distribution, UCC2807DTR-2 can be flexibly applied to various power supply designs to achieve effective PFC and power control.
Use case of chip UCC2807DTR-2
A typical application of UCC2807DTR-2 in power supply design is LED driving power supply. Modern LED lighting systems generally require high power factor to reduce harmonic pollution to the power grid and improve the efficiency of the lighting system.
In this application, UCC2807DTR-2 can be used together with efficient switching power supply circuit to ensure the phase adjustment between input current and input voltage and maintain a high power factor. Designers can use RT pin to set PWM modulation frequency, and adjust compensation network through COMP and SLOPE pin to achieve system stability and response speed. At the same time, the overcurrent protection and soft start function of UCC2807DTR-2 can ensure the safe and continuous operation of the equipment under dynamic load conditions.
In addition, UCC2807DTR-2 also has significant advantages in other application environments such as computer power management and electric vehicle charger. Through its high-performance PFC design, it can achieve optimal power utilization, provide stable power supply for various loads, and make it occupy a place in the broad market demand.
