LB11697V-W-AH

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Being permanently invested in the research of Printed Circuit Board (PCB), Intersil Corporation has designed the LB11697V-W-AH integrated circuit (IC), a precious chip produced with the aim to facilitate the board designers when creating digital power systems dedicated to automotive application areas. Examples of these are the door mirror inside a car and the steering wheel.

The LB11697V-W-AHIC belongs to the PMIC – Motor Drivers, Controllers, a category of integrated circuits which refers to all active components able to sustain and manage a certain electric charge. This charge is created and it travels is through the PCB, which needs to be controlled and managed through the PMICs.

The specific application field of LB11697V-W-AH supports a wide gamut of automotive components such as ECUs, engine-cooling fans and remote chamber pumps. The primary objective of this IC is accurate current consumption monitoring and control, used to avoid the excess current use which can lead to PCB damaging.

The LB11697V-W-AH offers three distinct control methods, typical of the PMIC category devices. These are Speed Closed Loop (SCL), Direct Drive PWM (DDP) and P.I.D. Closed Loop (CL). SCL is the most common control used while the other two are used in specific applications. For example, if a low noise, low (subsonic) frequency drivesystem is needed, the DDP mode is exactly the right choice.

The core of LB11697V-W-AH is based on a sensing and trackingvoltage error amplifier (SATEA) and uses a Darlington output module and a Lossless IsolatedControl Circuit (LICC) and an oscillator, which both together regulate the current feeding in the PCB.

The SATEA consists of two complementary FET Power transistors, two adjustable voltage regulators and two pull-up current sources.The pull-up current sources, combined with the Darlington outputs, provide a stable supply of current in both directions.

The LICC regulates the current in the PCB by means of an opto-isolator. It operates as a series transistor and delivers an shielded current to the PCB. Both the concentration of the current and the regulation of it are managed by an oscillator that is able to accurately adjust the voltage of the FETs and the voltage regulators, providing a smooth regulation of the current within the board.

The actual control system of LB11697V-W-AH is optimized for low-speed, low-power motor control applications. The IC helps to optimize, in real-time, the current by monitoring the power demands and loads, switching modes if necessary. Moreover, it can offer up to 8 different current ranges in order to match load requirements.

The operating temperature range of LB11697V-W-AH is very wide, covering -40°C to +120°C, making it suitable for a wide range of applications. The packagingavailable is 16-pin PDIP, making it a very practical tool for development groups. In addition, the chip size is relatively small, meeting the miniature PCB requirements.

To summarize, the LB11697V-W-AH integrated circuit is PMIC – Motor Drivers, Controllers created to facilitate digital power management in automotive component such as ECUs and pumps in order to avoid PCB (Printed Circuit Board) damages. The integrated circuit consists of a special voltage error amplifier with Darlington outputs, Lossless Isolated Control Circuit (LICC) and oscillator for regulating the current. The additional features and the wide temperature range make it the perfect choice for motor control applications.

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