Intersil Multiphase 55V Synchronous Boost Controller Simplifies Automotive Power System Design

MILPITAS, CA - March 2, 2016 — Intersil, Inc. (Nasdaq: ISIL), a leading provider of innovative power management and precision analog solutions, today announced the launch of two integrated high-side and low-side MOSFETs The drive's new 55V dual-phase synchronous boost controllers - ISL78227 and ISL78229. As the industry's most reliable and highly integrated boost controller, these two products can help simplify the design of high-power automotive applications. Powered by a 12V battery, the devices can boost the output voltage to 24V, 36V or 48V, making them a premium 200W - 800W trunk audio amplifier, start-stop system and headlight LED string. These controllers also meet the demanding requirements of industrial and telecom applications where step-up DC/DC converters must deliver high power in small sizes.

The ISL78227 and ISL78229 support a modular design that meets the system's scalability requirements for power and thermal management. They support a wide 5V-55V input/output voltage range and provide efficiencies greater than 95% to reduce power loss and heat dissipation. Interleaving two-phase applications for four-phase applications effectively doubles output power and reduces input/output ripple, enabling power supply designers to use smaller capacitors, saving board space and reducing bill of materials. Numerous protection features allow the ISL78227 and ISL78229 to adapt to almost any operating condition. Its unique soft-on function ensures smooth transition from discontinuous conduction mode (DCM) to continuous conduction mode (CCM) after soft-start is completed, ensuring that the power supply can safely start under all conditions. .

The ISL78227 and ISL78229 also offer a unique envelope tracking feature that dynamically adjusts or "lifts" the output voltage on the fly to meet all system load requirements. For example, as long as the battery power is low, the power consumption of various components such as audio amplifiers must be limited, especially if the engine is turned off and the radio is still on. Transient events such as starting-stop system restarting the engine also require voltage adjustment during operation. To simplify the task of obtaining the ISO 26262 Automotive Safety Integrity Level (ASIL) rating, the ISL78229 provides a digital PMBusTM interface for advanced control, telemetry and diagnostics. Having an on-chip PMBus interface eliminates the need for dedicated telemetry circuitry for configuring fault types, system recovery, and monitoring. Watch the ISL78227/29 solution video.

Philip Chesley, senior vice president of precision products at Intersil, said: "The ISL78227 and ISL78229 are suitable for high-power step-up applications, offering high efficiency in small sizes and multi-layer power protection. Unique features of innovative features, integrated tracking and PMBus options , providing customers with a reliable and easy to use solution for high voltage design."

Key features and specifications of the ISL78227 and ISL78229

· Provides 5V - 55V input / output voltage range, and can withstand transient voltages up to 60V;

· Supports synchronous or standard boost topologies with peak current mode control for fast line response with adjustable slope compensation;

· Configurable for single-phase, two-phase and four-phase operation modes to help achieve high efficiency;

· 50kHz - 1.1MHz adjustable switching frequency and external synchronization;

· Two-layer overcurrent protection to prevent system damage caused by inductor current run-away;

· Negative current protection to prevent high current from damaging the high-side FET;

· The average current limit allows for large currents during brief heavy loads and prevents overheating for long periods of time;

· Soft-on function provides a smooth transition from soft start to full working state in CCM mode;

· Adaptive and programmable dead time control to prevent breakdown current;

· Optional diode emulation and phase drop to optimize light load efficiency;

· AEC-Q100 certified, -40 ° C to +125 ° C operating temperature range;

· Wettable flank QFN package supports optical inspection (opTIcal inspecTIon) solder joints to help reduce manufacturing costs

PowerNavigatorTM GUI simplifies digital power design

Intersil's PowerNavigator software simplifies PMBs configuration, verification, monitoring and telemetry for the ISL78229. This tool makes it easy to change the features and functionality of a digital power supply design without writing any code. To download the PowerNavigator GUI and watch the instructional videos please log in:

The ISL78227 and ISL78229 can be combined with the ISL78206 40V/2.5A synchronous buck controller, the ISL78310 1A LDO, and the ISL78233 3A synchronous buck regulator to provide a complete power solution for automotive audio amplifier power supplies.

Supply

The ISL78227 55V Synchronous Boost Controller is available now in a 5mm x 5mm 32-lead WFQFN package. The ISL78227EV1Z evaluation board is also available. For more information please visit:

The ISL78229 55V Synchronous Boost Controller with PMBus is available now in a 6mm x 6mm 40-lead WFQFN package. The ISL78229EV1Z evaluation board is also available. For more information please visit:

About Intersil

Intersil is a leading provider of innovative power management and precision analog solutions. The company's products are used in increasingly intelligent, mobile and power-hungry electronic devices to help advance power management to increase efficiency and extend battery life.

With a strong intellectual property portfolio and a rich history of design and process innovation, Intersil is a trusted partner to some of the world's largest markets in industrial and infrastructure, mobile computing, automotive and aerospace. For more information on Intersil, please visit our website.

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