News Release

iC-MFL: 8-channel fail-safe FET driver 04.05.2009
with AEC Q100 qualification
MFL_Q100_web-motiv.jpg
iC-MFL is a monolithically integrated, 8-channel level shifter to drive Logic FETs. The internal circuit blocks have been designed in such a way that with single errors, such as open pins or the short-circuiting of two outputs, the iC-MFL output stages switch to a predefined, safe state. Externally connected FETs therefore shut down safely in the event of a single error. The device is now qualified for typical SIL/ASIL applications according to AEC Q100.

The typical applications are driving FETs from 1.8 V, 3.3 V or 5 V TTL- and CMOS-compatible systems such as FPGAs, modern microcontroller and microprocessor with "fail safe"-requirements of the device to achieve functional safety at the sub-system level in the automotive area. A device related FMEA analysis has been the base for the development and is available for the userís own end equipment SIL/ASIL-qualification.

The inputs of the eight channels consist of a Schmitt trigger with a pull-down current source and are compatible with TTL and CMOS levels (1.8 V, 3.3 V or 5 V) and are voltage-proof up to 18 V. Pull-down resistors provide the safe low-level at open inputs and have two stages in order to minimize power dissipation with enhanced noise immunity. The eight channels have a current limiting Push-Pull output stage and a pull-down resistor.

Should the supply voltage at VB drop below a predefined threshold, the voltage monitor causes the outputs to be actively tied to the off state. If the supply voltage or one ground connection ceases, the outputs regardless reach the safe off state.

Even with two outputs shorted and one driving a FET with a high signal, the off state driver predominates, keeping the connected FETs in a safe shutdown state.

The devices are protected against destruction by ESD. Temperature monitoring protects the devices from too high power dissipation. The devices operate from -40 °C to 125 °C and are available in a ROHS conform QFN24 package.
Product iC-MFL, iC-MFLT
Press Release iC-MFL (Q100) (3734 kb)
Presseinformation iC-MFL (Q100) (3734 kb)
 
Product Overview
Application Guide