MOSFET power switches for automotive lighting applications

Freescale Semiconductor has introduced new four high-side power switches for automotive lighting applications. The features include the ability to drive high-intensity discharge xenon, halogen and light-emitting diode (LED) light sources with a single IC device.
The new eXtreme Switch Gen III models are N-channel MOSFET switches with low on-resistance, ranging from 10 milliohms to 35 milliohms per channel that can simultaneously control the high sides of up to four light sources.
The devices use performance profiles for each type of light source to precisely track its operation and deliver optimal efficiency and greatest protection.
The light source is dimmed using a pulse width modulation (PWM) technique that varies the average power to the bulb to control the light intensity. This technique also extends the bulb life, while providing full protection features.
The new device provides diagnostics for the switch, light source and wiring harness, as well as comprehensive fault management and control of the loads without complex software.
The latched overcurrent shutdown protection technique used minimizes the thermal stress within the device during an over-load condition, thus reducing the junction temperature rise.

Some of the other key features are listed below:

1. Four protected high-side switches (at 25°C) with varying milliohms per channel:
    MC15XS3400 - four 15-milliohm channels
    MC35XS3400 - four 35-milliohm channels
    MC10XS3412 - two 10- and two 12-milliohm channels
    MC10XS3435 - two 10- and two 35-milliohm channels
2. Operating voltage range of 6.0V to 20V with sleep current < 5.0µA, extended mode from 4.0V to 28V.
3. 8MHz 16-bit 3.3V and 5V SPI control and status reporting with daisy chain capability.
4. PWM module using external clock or calibratable internal oscillator with programmable outputs delay     management.
5. Over-current shutdown, severe short-circuit, over-temperature protections with time limited auto-retry     and fail-safe mode in case of MCU damage.
6. Output OFF or ON open-load detection compliant to bulbs or LEDs and short to battery detection.
7. Analog current feedback with selectable ratio and board temperature feedback.

Packaging: PQFN package
Size: 12 x 12 mm
Availability: The devices are sampling now, and full production is
expected later this quarter.

For more information please visit: http://www.freescale.com/files/pr/analog