TPS61070DDCR Detai LED explanation of pin function specifications and circuit principle instructions

The TPS61070DDCR is a part number for a Texas Instruments product. Specifically, the TPS61070 is a boost converter IC (Integrated Circuit) designed for Power ing small devices like O LED displays, sensors, or other portable equipment that require voltage conversion.

The full package type for the TPS61070DDCR is a QFN (Quad Flat No-lead) package with 16 pins.

To ensure clarity, I'll break down the requested information systematically, as requested:

Package Type:

Package Type: QFN-16 (Quad Flat No-lead 16 Pins) Package Dimensions: The TPS61070DDCR package is housed in a small 3mm x 3mm package. Lead Type: No-lead (increased thermal and electrical performance).

Pin Function Specifications:

Pin Number Pin Name Pin Description 1 VIN Input Voltage Pin: Supplies power to the device. Connect to an appropriate voltage source. 2 EN Enable Pin: A logic-high enables the device. A logic-low disables the device. 3 VOUT Output Voltage Pin: This is where the boosted voltage output is taken from. 4 FB Feedback Pin: Used for voltage regulation by comparing output voltage to a reference voltage. 5 GND Ground Pin: Connect to the system ground. 6 LX Switch Node Pin: Connects to the inductor to control current flow during the conversion process. 7 SW Switch Pin: This pin is used to connect to the inductor for the power conversion cycle. 8 PGND Power Ground Pin: Provides return current for the power stage. 9 COMP Compensation Pin: Connects to a capacitor to stabilize the feedback loop and ensure proper operation. 10 NC No Connect: This pin is not connected internally and should be left floating. 11 VOUT- Negative Output Voltage Pin (for inverting configurations, if supported). 12 VDD Positive Supply Pin: Connect to the input power supply. 13 POK Power OK Pin: Indicates whether the output voltage is within acceptable range. 14 VSS System Ground Pin: Connects to the system's ground. 15 OUT- Output Negative Pin (for some specific output configurations). 16 NC No Connect: This pin is not connected internally and should be left floating.

Circuit Principle Explanation:

The TPS61070 is designed as a step-up (boost) converter. It increases a lower input voltage to a higher output voltage. Here's how it works:

Inductor: The IC uses an inductor to store energy during the on-state of the switch and releases it during the off-state to increase the voltage. Switch: The internal switch is periodically turned on and off by the IC to create a pulsed current through the inductor. Feedback and Regulation: The output voltage is regulated by comparing the voltage at the feedback pin (FB) to an internal reference. The feedback mechanism adjusts the switch duty cycle to maintain a constant output voltage. Compensation: The COMP pin provides additional loop compensation to maintain stability under varying load conditions.

FAQ:

What is the input voltage range for the TPS61070? The TPS61070 operates within a voltage range of 0.8V to 3.6V at the input (VIN pin). Can the TPS61070 be used with a 5V input? No, the TPS61070 is not designed to be used with a 5V input. It requires an input voltage between 0.8V and 3.6V. What is the output voltage range of the TPS61070? The output voltage can be configured between 1.8V to 5.5V, depending on the feedback resistor settings. How do I enable the TPS61070? The TPS61070 is enabled by driving the EN pin high (logic-high). It will be disabled if the EN pin is low (logic-low). What is the purpose of the feedback pin (FB)? The feedback pin is used to monitor the output voltage and compare it to an internal reference to regulate the output voltage. Can I connect the feedback pin directly to the output? No, the feedback pin must be connected to a resistor divider to set the desired output voltage. How do I choose the inductor for the TPS61070? The inductor value is typically between 4.7µH and 10µH, depending on your output voltage and current requirements. What is the maximum output current of the TPS61070? The TPS61070 can supply up to 600mA of output current under ideal conditions. Is thermal management required for the TPS61070? Yes, the device has an integrated thermal shutdown feature, but proper PCB layout for heat dissipation is recommended for high-current applications.

Can the TPS61070 be used in a low-power, battery-powered application?

Yes, the TPS61070 is designed to be highly efficient and suitable for battery-powered systems where low quiescent current is important.

What is the typical efficiency of the TPS61070?

The typical efficiency of the TPS61070 is about 85% under standard operating conditions.

Can I use the TPS61070 for a 12V output voltage?

No, the TPS61070 is designed for lower output voltages. For 12V output, a different device would be required.

What should I do if the output voltage is too low?

Ensure that the input voltage is above the minimum required and check the feedback resistor network for correct voltage setting.

Is the TPS61070 suitable for driving an OLED display?

Yes, the TPS61070 is ideal for driving small OLED displays that require a stable, boosted voltage.

What is the maximum switching frequency of the TPS61070?

The switching frequency of the TPS61070 is typically 1.2 MHz.

Can I use the TPS61070 in a 3.3V system?

Yes, the TPS61070 works well in 3.3V systems for powering components that require a higher voltage.

How do I calculate the output voltage of the TPS61070?

The output voltage can be set by adjusting the feedback resistor ratio connected to the FB pin.

What happens if the EN pin is left floating?

If the EN pin is left floating, the device may not operate correctly. It is recommended to pull the EN pin high or low as per the required logic.

What is the function of the POK pin?

The Power OK (POK) pin indicates whether the output voltage is within the acceptable range.

Can the TPS61070 be used for non-boost configurations?

No, the TPS61070 is specifically designed for step-up (boost) voltage conversion and cannot be used in other configurations.

This document covers the pinout, basic circuit principle, and common FAQs for the TPS61070. Would you like more detailed explanations on any specific section?