UCC3804DTRG4 Overview
UCC3804DTRG4 is a high-performance PWM (pulse width modulation) controller, mainly used for DC-DC converters and other power management applications. The chip integrates many functions, including current mode control, programmable frequency and switching time, over-current protection and feedback voltage regulation. These characteristics make it widely used in the design of high efficiency and high reliability switching power supply.
Detailed parameters
When analyzing the detailed parameters of UCC3804DTRG4, we can consider the power supply voltage, power consumption, operating frequency, output current, overcurrent protection, operating temperature range and other aspects.
1. Power supply voltage range: The working voltage range of UCC3804DTRG4 is usually between 4.5V and 30V, and the voltage fluctuation within this range has little impact on the performance of the chip. 2. Power consumption: The power consumption of this chip is very low when working, and the efficiency can usually reach more than 90%, so it is very suitable for high efficiency power supply design. 3. Operating frequency: The frequency range supported by UCC3804DTRG4 is generally 100kHz to 1MHz, which can be flexibly adjusted by the designer according to the system requirements.
4. Output current: The chip has a strong output current capability, which can support loads up to 1.5A and adapt to a variety of application scenarios.
5. Over current protection: the built-in over current protection function can effectively prevent damage to the circuit caused by abnormal conditions, and ensure the stability and safety of the system.
6. Operating temperature range: UCC3804DTRG4 works stably in the temperature range of - 40 ° C to+125 ° C, so that it can still maintain good performance in various harsh environments.
Manufacturer, packaging and packaging
The manufacturer of UCC3804DTRG4 is Texas Instruments, which enjoys a high reputation and market share in the fields of analog circuits, digital signal processing and power management. The packaging mode of the chip is VQFN (Flat Pinless Package), specifically 16 pins. This packaging mode not only improves the physical strength, but also reduces the occupied area of the circuit board, which is suitable for high-density wiring applications.
Pin and circuit diagram description
UCC3804DTRG4 has 16 pins, and the specific pin functions are as follows:
1. VCC (pin 1): power supply pin, connected to power supply. 2. GND (pin 2): ground pin. 3. CSN (pin 3): current sensing input, which needs to be connected to the current detection resistance. 4. CSN (pin 4): current sensing input, determine the feedback of output current together with CSN. 5. COMP (Pin 5): Compensation pin of error amplifier, used to stabilize current feedback loop. 6. RAMP (pin 6): used to connect slope signal to ensure output stability. 7. SW (pin 7): switch pin, connected to the switching element of the converter. 8. OUT (pin 8): drive the output pin of the external power transistor. 9. VP (Pin 9): Feedback regulation input, connected to output voltage feedback loop. 10. FREQ (pin 10): frequency setting pin, adjust the operating frequency through external resistance. 11. RT (pin 11): time setting pin, set PWM duty cycle. 12. TR/SYNC (pin 12): trigger and synchronization pin. 13. PGA (Pin 13): Gain adjustment pin. 14. CREF (pin 14): reference voltage, guiding the internal voltage regulation of the system. 15. ZC (pin 15): zero crossing monitoring pin, used to optimize switch control. 16. LATCH (pin 16): pin used to latch status.
Use Cases
UCC3804DTRG4 is widely used in many situations in the field of power electronics. Here are some typical use cases:
1. DC-DC converter
In the design of DC-DC regulated power supply, UCC3804DTRG4 is often used as a controller for boosting or reducing voltage. When designing a buck converter with an input voltage of 12V and an output voltage of 5V, designers can use the current mode control function of the chip to achieve efficient energy conversion. By using pin VP to connect output voltage for feedback, the matching compensation network can also be configured through the COMP pin to ensure the steady and dynamic performance of the current loop.
2. Flow control system
UCC3804DTRG4 also shows excellent performance in flow control systems that require high precision and fast response. For example, if it is necessary to control the flow of gas or liquid, the chip can be used as the driver of the flow sensor. By setting appropriate PWM frequency and duty cycle, users can accurately control the drive of flow equipment, thus achieving accurate adjustment of flow control.
3. Battery management system
In the battery management system (BMS), UCC3804DTRG4 can be used as the control core of charging equipment. The system can use UCC3804 to precisely control the charging process by monitoring the charging state, temperature, voltage and other parameters of the battery, so as to ensure the safety and performance optimization of the battery. Higher charging efficiency and intelligent monitoring capability can be achieved through this chip.
4. LED drive
In the LED lighting system, UCC3804DTRG4 is responsible for adjusting the brightness of LED. By adjusting the duty cycle of PWM, users can effectively control the luminous intensity of LED, extend its service life and improve energy efficiency. In addition, the chip's over-current protection features are also applicable, which can effectively prevent LED damage due to over-current.
It can be seen from the above cases that UCC3804DTRG4 has important application value in modern power supply design. With its efficient control characteristics, designers can develop more intelligent, efficient and safe power supply solutions.
