GENEVA /Marketwire -- STMicroelectronics, a global semiconductor leader serving customers across the spectrum of electronics applications and a top supplier of automotive semiconductors, has revealed the latest generation of its pace-setting switch ICs for vehicle electronics such as lights and body modules. The new devices provide enhanced intelligent features, improve protection and reliability, and up to 40% smaller form factors than competing alternatives.
Pioneered by ST, intelligent high-side switches provide a more reliable and efficient replacement for conventional relays. For several generations, ST's VIPower family has offered advantages such as a common package style for many devices in the range. This allows tier-one suppliers to build several module variants using the same basic hardware and software so carmakers can address differing requirements in international markets and offer various model specifications and options cost-effectively. The common-package approach has become widely adopted among high-side switch vendors.
In the seventh generation of ST's VIPower family, the M0-7 series announced recently, 75% of family members are available in a 5 by 4 mm package, which is 40% smaller than the smallest competing devices. This allows car electronics designers to save PC-board space and aim for smaller module sizes. Moreover, various internal design changes increase precision, enhance diagnostic feedback, and improve reliability. Specifically, performance improvements include greater protection against short circuits, more accurate voltage and temperature feedback, increased current-sense precision, and best-in-class electromagnetic emission performance.
Samples of all models are available now. The first device to enter production will be the dual-channel VND7020AJ-E, in Q2 2013, priced from $1.10 for orders over 1,000 pieces. The full range of package types available across the new family will include PowerSSO-16, PowerSSO-36, Octapak, and SO-8.
Major Features of the M0-7 Series
- Precise load-current, voltage, and temperature monitor feedback
- Integrated sense multiplexer
- Power-limitation and over-temperature latch-off
- Bulb/LED mode (quad channel)
- Flexible fault-reset management
- Reverse-polarity protection
- Full on- and off-state diagnostics capability
- Ultra-low quiescent current
Background to Automotive High-Side Switches
The intelligent high-side switch has an important role in the development of advanced automotive electronics. It combines a power MOSFET as the main electronically controlled switch with logic, control, and sensing circuitry in a single package. It is connected between a microprocessor and loads such as lights, motors, heaters, or valves, allowing the microprocessor to control the loads in response to inputs such as dashboard switches or sensors, as well as information from the intelligent circuitry in the high-side switch. The sensors may be ambient-light sensors, rain sensors, cabin-temperature sensors, wheel-speed sensors, or others, depending on the type of subsystem.
By integrating sensing, control, and logic circuitry, the intelligent high-side switch can operate reliably with different types of loads, such as highly inductive loads like motors or resistive loads like heaters. Moreover, these intelligent features allow the switch to perform many functions without intervention from the microprocessor, which helps engineers simplify software and use processor resources efficiently. Built-in protection against conditions such as over-voltage, over-temperature, and open or short circuits helps prevent damage to subsystems, modules, or wiring and allows the switch to restart when safe.
Since it is specially designed to operate on the high side of the load, connected directly to the battery voltage, the high-side switch allows the negative terminal of the load to be connected directly to the vehicle chassis. This cuts significant cost and weight from the vehicle by reducing wiring and connectors.
STMicroelectronics is a global leader in the semiconductor market, serving customers across the spectrum of sense and power and automotive products and embedded processing solutions. From energy management and savings to trust and data security, from healthcare and wellness to smart consumer devices, in the home, car, and office, at work and at play, ST is found everywhere microelectronics make a positive and innovative contribution to people's life. By getting more from technology to get more from life, ST stands for life.augmented. In 2011, the company's net revenues were $9.73 billion.