The part number ICL7660AIBAZA-T is a voltage converter IC, specifically from Intersil, which is now part of Monolithic Power Systems (MPS). It is typically used for generating negative voltages from a positive voltage input.
Pinout and Function of the ICL7660AIBAZA-T
IC Package: The ICL7660AIBAZA-T comes in an 8-pin SOIC package (Small Outline Integrated Circuit). Pin Functions: Pin Number Pin Name Pin Function Description 1 VOUT Output voltage (Negative Voltage). This pin provides the negative output voltage that is generated from the positive input voltage. The typical output is -5V if the input is +5V. 2 GND Ground. This is the reference voltage level for the IC. It is connected to the ground of the system in which the IC is used. 3 IN Input voltage (Positive Voltage). This pin is used to supply the positive input voltage to the IC. The input voltage must be higher than the output voltage, typically +5V to +12V depending on the application. 4 NC No connection. This pin is not used and is internally left floating. 5 CAP+ capacitor connection pin. This pin is connected to the positive terminal of the external capacitor (typically 10 µF) that helps to form the charge pump circuit for voltage conversion. 6 CAP- Capacitor connection pin. This pin is connected to the negative terminal of the external capacitor that works in conjunction with the CAP+ pin for generating the negative voltage. 7 REF Reference pin. This pin is used for the internal voltage reference generation for the operation of the internal oscillator that drives the charge pump. It is typically tied to ground in normal usage. 8 ON/OFF Control pin for turning the IC on or off. It controls the operation of the IC. When driven low, the IC is disabled (OFF). When driven high, the IC is enabled (ON). This pin is internally pulled up, so the IC operates normally when left unconnected.Circuit Principle:
The ICL7660AIBAZA-T works based on a charge pump principle. It uses an internal oscillator and capacitors to invert the input voltage and create a corresponding negative output voltage. This process is controlled by the internal switching mechanism between the two capacitors connected to the CAP+ and CAP- pins.
The capacitor at CAP+ is charged by the input voltage at IN. The charge from CAP+ is then transferred to CAP-, and the voltage at CAP- is inverted with respect to the input voltage. The VOUT pin provides the negative voltage, typically -5V for a +5V input.FAQ (Frequently Asked Questions)
Q: What is the maximum input voltage for the ICL7660AIBAZA-T? A: The maximum input voltage for the ICL7660AIBAZA-T is 12V. Q: What is the typical output voltage of the ICL7660AIBAZA-T? A: The typical output voltage is -5V when the input is +5V. Q: What are the recommended capacitors for the ICL7660AIBAZA-T? A: The recommended capacitors for the ICL7660AIBAZA-T are 10µF ceramic capacitors for both CAP+ and CAP- pins. Q: How does the ICL7660AIBAZA-T generate a negative voltage? A: The ICL7660AIBAZA-T uses a charge pump mechanism, where capacitors charge and discharge to invert the input voltage, generating a negative output. Q: What is the purpose of the REF pin on the ICL7660AIBAZA-T? A: The REF pin is used internally for generating the voltage reference required for the internal oscillator to drive the charge pump. Q: Can the ICL7660AIBAZA-T generate both positive and negative voltages? A: No, the ICL7660AIBAZA-T can only generate negative voltages from a positive input. Q: What happens if the input voltage is too low for the ICL7660AIBAZA-T? A: If the input voltage is too low, the IC may fail to generate the required negative voltage at the output. Q: What happens when the ON/OFF pin is driven low? A: When the ON/OFF pin is driven low, the ICL7660AIBAZA-T is disabled and will not operate. Q: What is the internal switching frequency of the ICL7660AIBAZA-T? A: The internal switching frequency of the ICL7660AIBAZA-T is typically around 10 kHz.Q: How much output current can the ICL7660AIBAZA-T supply?
A: The ICL7660AIBAZA-T can supply a maximum output current of 20mA.Q: What is the power efficiency of the ICL7660AIBAZA-T?
A: The power efficiency of the ICL7660AIBAZA-T is typically around 70% depending on the load and input voltage.Q: Is the ICL7660AIBAZA-T suitable for battery-powered applications?
A: Yes, the ICL7660AIBAZA-T is often used in battery-powered applications due to its low current consumption.Q: How can I reduce noise in the output voltage of the ICL7660AIBAZA-T?
A: Adding a bypass capacitor (e.g., 0.1µF) near the VOUT pin can help reduce noise and ripple.Q: What is the role of the ground pin (GND) in the ICL7660AIBAZA-T?
A: The ground pin (GND) is the reference point for the input and output voltages, ensuring proper operation of the IC.Q: Can I use the ICL7660AIBAZA-T for high-power applications?
A: No, the ICL7660AIBAZA-T is designed for low-power applications, typically providing a few milliamps of current.Q: What is the operating temperature range of the ICL7660AIBAZA-T?
A: The operating temperature range of the ICL7660AIBAZA-T is from -40°C to +85°C.Q: Can the ICL7660AIBAZA-T be used with unregulated inputs?
A: Yes, the ICL7660AIBAZA-T can work with unregulated inputs, but the input voltage should still be within the specified range.Q: How do I connect the capacitors to the ICL7660AIBAZA-T?
A: Connect the positive terminal of the capacitors to CAP+ and the negative terminal to CAP- for proper charge pump operation.Q: What is the purpose of the NC pin on the ICL7660AIBAZA-T?
A: The NC pin has no connection and does not serve any function in the circuit.Q: Can the ICL7660AIBAZA-T work with a single-ended power supply?
A: Yes, the ICL7660AIBAZA-T can operate from a single-ended positive voltage supply and generate a negative output.This covers the detailed pinout, functionality, and FAQs for the ICL7660AIBAZA-T.
