The model "TPS61165DRVR" is a product from Texas Instruments (TI). It is a DC-DC boost converter used for driving LED s with features like dimming and adaptive control. The following will include a detailed explanation of the pin function specifications, circuit principles, and a complete list of pin functions for the specific package.
1. Package Type
The TPS61165DRVR is housed in a VQFN (Very Thin Quad Flat No-lead) package with 16 pins. The VQFN package is compact and has no leads, offering excellent thermal and electrical performance.
2. Pin Function Specifications and Circuit Principle Instructions
Here is a detailed breakdown of the 16 pins for TPS61165DRVR in the VQFN package:
Pin Number Pin Name Pin Type Pin Description 1 VIN Power Input This pin connects to the power supply input. The input voltage range is typically 4.5V to 24V. 2 SW Output Switching This pin connects to the switching node of the inductor. It is used for controlling energy storage and release. 3 PGND Ground This pin is the power ground for the switching circuit. It should be connected to the ground plane. 4 EN Logic Input This pin enables or disables the operation of the device. A logic-high level enables operation. 5 GND Ground This is the ground reference pin for the entire IC and must be connected to the system ground. 6 FB Feedback Input This pin receives feedback from the output and adjusts the regulator to maintain a constant output voltage. 7 VOUT Output This pin connects to the LED string or the load. It is the regulated output voltage. 8 VDD Power Supply This is the input voltage pin for the IC and connects to the main power source. Typically 5V or higher. 9 CT Timing capacitor This pin connects to an external capacitor to set the timing frequency for internal control circuits. 10 OVP Overvoltage Protection This pin detects if the output voltage exceeds the set threshold and triggers protective measures. 11 IADJ Current Adjustment This pin allows for adjusting the current through the LED string. It adjusts the LED current regulation. 12 DIM Dimming Control This pin is used to control the brightness of the LED by modulating the current. It supports PWM dimming. 13 ISEN Current Sense This pin is used for current sensing to regulate the current through the LEDs. 14 TREF Reference Voltage This pin provides a reference voltage for internal regulation circuits. 15 NC No Connection This pin has no electrical function and is left floating or unconnected. 16 PG Power Good This pin indicates whether the output voltage is within the desired range. It is a logic output pin.3. Pin Function 20 FAQ (Frequently Asked Questions)
FAQ:Q1: What is the input voltage range for the TPS61165DRVR? A1: The input voltage range for the TPS61165DRVR is 4.5V to 24V.
Q2: How can I enable the TPS61165DRVR device? A2: The device is enabled by applying a logic-high level to the EN pin (pin 4).
Q3: What is the purpose of the SW pin? A3: The SW pin (pin 2) connects to the switching node of the inductor and is used for energy storage and release during operation.
Q4: What is the function of the FB pin? A4: The FB pin (pin 6) is the feedback input that adjusts the regulator to maintain a constant output voltage.
Q5: How do I adjust the current in the LED string? A5: You can adjust the LED current through the IADJ pin (pin 11).
Q6: What is the recommended operating temperature range for the TPS61165DRVR? A6: The operating temperature range is -40°C to 125°C.
Q7: What should I do if the output voltage exceeds the desired threshold? A7: The OVP pin (pin 10) will trigger overvoltage protection if the output voltage exceeds the set threshold.
Q8: Can I use the DIM pin for controlling LED brightness? A8: Yes, the DIM pin (pin 12) allows you to control the LED brightness via PWM dimming.
Q9: What is the role of the CT pin in the circuit? A9: The CT pin (pin 9) connects to a timing capacitor to set the internal control frequency.
Q10: What is the PG pin used for? A10: The PG pin (pin 16) indicates whether the output voltage is within the correct range, functioning as a power good signal.
Q11: How can I monitor the current through the LEDs? A11: The ISEN pin (pin 13) is used for current sensing to regulate the LED current.
Q12: What is the significance of the VDD pin? A12: The VDD pin (pin 8) is the power supply input to the device, usually connected to a 5V or higher voltage source.
Q13: How should I connect the ground pins (PGND and GND)? A13: Both the PGND (pin 3) and GND (pin 5) pins should be connected to the ground plane to ensure proper operation.
Q14: Does the TPS61165DRVR support dimming control? A14: Yes, the DIM pin (pin 12) supports PWM dimming control for LED brightness adjustment.
Q15: Can the TPS61165DRVR be used in automotive applications? A15: Yes, the device is designed to be used in a wide range of applications, including automotive lighting, as it supports a wide input voltage range.
Q16: What happens if the EN pin is held low? A16: If the EN pin (pin 4) is held low, the TPS61165DRVR will be disabled, and no output voltage will be generated.
Q17: Can I use the TPS61165DRVR with a capacitor on the CT pin? A17: Yes, a capacitor should be connected to the CT pin to set the timing frequency for internal regulation.
Q18: What is the power supply voltage for the TPS61165DRVR? A18: The power supply voltage is typically 5V, but the input voltage range is from 4.5V to 24V.
Q19: How do I connect the VOUT pin? A19: The VOUT pin (pin 7) should be connected to the LED string or the output load to provide the regulated output voltage.
Q20: What is the significance of the NC pin? A20: The NC pin (pin 15) has no electrical function and can be left unconnected.
This information should provide a complete overview of the TPS61165DRVR and its usage with all 16 pins and their functionalities. The FAQ section helps clarify common questions about the operation of the IC in different circuit configurations.
