The TPS61088RHLR is part of the Texas Instruments (TI) product line. It is a boost converter IC, designed for various applications where high-efficiency Power conversion is needed.
Package Type:
The model TPS61088RHLR is in a VQFN-16 package. This stands for Very Thin Quad Flat No-lead (QFN) package with 16 pins.
Pin Function Specifications and Circuit Principle:
Here is a detailed explanation of the pin functions for the TPS61088RHLR package, which has 16 pins:
Pin Pin Name Description 1 VIN Input Voltage Pin: This is where the input voltage (typically 2.3V to 5.5V) is applied to the IC. 2 EN (Enable) Enable Pin: This pin is used to enable or disable the device. A logic low on this pin disables the IC. 3 SW1 Switch Node: This pin connects to the external inductor and is used for the switching element. 4 GND Ground Pin: The ground reference for the device. All voltage measurements are referenced to this pin. 5 FB1 (Feedback) Feedback Pin: This is the feedback pin for the regulator. It monitors the output voltage for regulation. 6 VOUT Output Voltage Pin: This is where the regulated output voltage is provided. 7 SW2 Switch Node 2: Another switching pin connected to the external inductor for the boost converter. 8 NC (No Connection) No Connection: This pin is not connected internally and is typically used for mechanical reasons. 9 SW3 Switch Node 3: This pin is used in the boost converter architecture for switching. 10 SS (Soft-Start) Soft-Start Pin: This pin controls the soft-start time for the output voltage to ramp up gradually. 11 PGND Power Ground: This is the ground reference for high-current signals related to power management. 12 VCC Supply Voltage Pin: The VCC pin typically connects to the 5V supply voltage rail for internal circuitry. 13 SENSE Current Sensing Pin: This pin is used to sense the inductor current for regulation and protection. 14 C1+ ( capacitor +) Capacitor Positive Pin: This pin is connected to the positive terminal of the input filter capacitor. 15 C1- (Capacitor-) Capacitor Negative Pin: This pin is connected to the negative terminal of the input filter capacitor. 16 PG (Power Good) Power Good Pin: This pin indicates whether the output voltage is within the desired range.Pin Function FAQs:
1. What is the input voltage range for the TPS61088RHLR? The input voltage range for the TPS61088RHLR is from 2.3V to 5.5V.
2. How can I disable the TPS61088RHLR IC? You can disable the IC by pulling the EN (Enable) pin low.
3. What is the function of the SW1 pin? The SW1 pin is the main switch node and is used to connect the external inductor to the IC for the switching operation.
4. What should I connect to the GND pin? The GND pin should be connected to the ground reference of the system to ensure proper voltage measurements.
5. How does the feedback pin (FB1) work? The FB1 pin monitors the output voltage. The IC uses the voltage at this pin to regulate the output voltage through feedback control.
6. Can I use the VOUT pin directly to power a device? Yes, the VOUT pin provides the regulated output voltage, which can be used to power other components or devices.
7. What is the purpose of the SW2 and SW3 pins? SW2 and SW3 are additional switch nodes used to connect external components, such as inductors, for the boost converter operation.
8. What is the function of the SS (Soft-Start) pin? The SS pin controls the soft-start function, allowing for a gradual ramp-up of the output voltage to avoid sudden surges.
9. How do I connect the Power Ground (PGND) pin? PGND should be connected to the ground of the power circuitry. It handles higher current and should be separate from the low-current ground to avoid noise.
10. What is the maximum output voltage for the TPS61088RHLR? The TPS61088RHLR can regulate an output voltage up to 15V, depending on the configuration.
11. Can I use the TPS61088RHLR for charging batteries? Yes, it can be used for charging applications, but the output voltage must be tailored to the battery's voltage requirements.
12. How does the Power Good (PG) pin work? The PG pin indicates whether the output voltage is within the acceptable range. A high signal means the output is within specifications.
13. What happens if I leave the EN pin floating? Leaving the EN pin floating could result in unpredictable behavior. It is recommended to pull it to a defined logic level (high or low).
14. Can I use a higher input voltage than 5.5V for this IC? No, the TPS61088RHLR should not be used with an input voltage higher than 5.5V as it may damage the IC.
15. How do I select the inductor for this IC? The inductor should be selected based on the output current requirements and the operating frequency. Refer to the datasheet for recommended inductance values.
16. What is the maximum current that the TPS61088RHLR can provide at the output? The maximum current depends on the input voltage and output voltage configuration. It can typically provide up to 1A at the output.
17. Is there a way to adjust the output voltage? Yes, the output voltage can be adjusted using external resistors connected to the feedback pin.
18. What is the thermal shutdown feature for? The thermal shutdown protects the IC from overheating. If the junction temperature exceeds a certain threshold, the IC will shut down to prevent damage.
19. How do I calculate the soft-start time? The soft-start time can be calculated based on the external capacitor connected to the SS pin. Refer to the datasheet for calculation details.
20. Can I use the TPS61088RHLR in automotive applications? Yes, the TPS61088RHLR is suitable for automotive applications, as it can handle a wide input voltage range and is designed for high efficiency.
Summary:
This detailed explanation covers the functions of the 16 pins of the TPS61088RHLR boost converter IC and answers common questions regarding its use. This IC is designed for efficient power management applications, and understanding each pin's function is crucial for proper integration in electronic systems.