
Allicdata Part #: | ISL95870BIRZ-T-ND |
Manufacturer Part#: |
ISL95870BIRZ-T |
Price: | $ 1.36 |
Product Category: | Integrated Circuits (ICs) |
Manufacturer: | Intersil |
Short Description: | IC CTRLR PWM 1PHASE GPU 20QFN |
More Detail: | Robust Ripple Regulator™ (R3) Controller, GPU Core... |
DataSheet: | ![]() |
Quantity: | 1000 |
1 +: | $ 1.36000 |
10 +: | $ 1.31920 |
100 +: | $ 1.29200 |
1000 +: | $ 1.26480 |
10000 +: | $ 1.22400 |
Series: | Robust Ripple Regulator™ (R3) |
Packaging: | Tape & Reel (TR) |
Part Status: | Active |
Applications: | Controller, GPU Core Power |
Voltage - Input: | 3.3 V ~ 25 V |
Number of Outputs: | 1 |
Voltage - Output: | 0.5 V ~ 5 V |
Operating Temperature: | -40°C ~ 100°C |
Mounting Type: | Surface Mount |
Package / Case: | 20-VFQFN Exposed Pad |
Supplier Device Package: | 20-QFN (3x4) |
Base Part Number: | ISL95870 |
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PMIC - Voltage Regulators - Special Purpose
The ISL95870BIRZ-T integrated circuit is a power management integrated circuit (PMIC) designed with special purpose voltage regulators. Specifically, it is designed as an advanced single-phase Totem-pole PFC controller, allowing for a single-stage power factor correction. This technology, in turn, is used for harmonizing the AC current and improving the efficiency of power conversion.
This PMIC features two different operating modes, accommodating the user’s needs regarding the size of the passive filter and the output voltage range. The two modes are often referred to as “Mode 1” and “Mode 2,” which both feature their own set of parameters. In Mode 1, a small filter is used, allowing for higher efficiency and the possibility of increased output voltage range. In Mode 2, the IC offers a higher switch current and lower external component count for smaller, cost effective systems. In addition to the two modes, ISL95870BIRZ-T’s input currents and output voltages are adjustable. The input voltage range, however, is dependent on the individual application.
The advanced single-phase Totem-pole PFC regulator IC is primarily applied in applications such as LED lighting, automotive electronics, inductive charging and point of load (POL) converters. Due to this integrated circuit’s excellent line and load regulation characteristics that produce consistent output, it can be utilized in applications such as low-power DC/DC supplies and linear converters. As the IC switches between two modes, it includes protection features such as complete protection against over current, over voltage, and thermal overload.
The ISL95870BIRZ-T comprises of several components that are key in its functionality. Firstly, the integrated circuit has a voltage sensor circuit and an oscillator. The voltage sensor is responsible for monitoring the output voltage, whilst the oscillator is responsible for generating the clock main control signal for the circuit. In addition, there is an analog control block which controls the peak current of the converter. Furthermore, circuitry for current sensing and thermal protection is included, allowing for the prompt shut down of the voltage regulator if conditions become hazardous.
Upon this circuitry structure, several transistors - such as Insulated Gate Bipolar Transistors (IGBTs) - are applied. When the IGBTs are switched on, a voltage drop occurs and the current flow is maintained by continual replenishing by incoming pulses. This occurs as the IGBTs switch off, when the leaking current stored in the magnetic field of the inductor is used to maintain the current flow. It is on these principles, of switching on and off in alternating intervals, that the ISL95870BIRZ-T voltage regulator works.
In conclusion, the ISL95870BIRZ-T integrated circuit is an advanced single-phase Totem-pole PFC controller applied in PMIC devices. It functions by alternating switching on and off cycles of the IGBT transistors in order to maintain a consistent voltage source. This integrated circuit is suitable for applications such as LED lighting, automotive electronics, inductive charging and POL converters due to its excellent line and load regulation characteristics. Furthermore, the IC provides excellent protection against over current, over voltage and overheating, making it a reliable and safe choice.
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