New-Tech Europe Magazine | July 2017

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input voltage range and can produce output currents in multiple 10s of amps, depending on the topology and choice of external components. It can be configured for a 2:1 step-down ratio from an input voltage up to 72V. Two of the LTC7820 IC’s can be cascaded for a 4:1 step- down ratio. For even higher step-down ratios, such as a 6:1, the Dickson converter topology is recommended and is ideal for 54V input to a 9V outputs, requiring only a single LTC7820. The LTC7820 can also be configured for a 1:2 step-up ratio or a 1:1 inverter ratio from an input voltage as high as 36V. External MOSFETs switch at a fixed frequency, programmable from 100kHz to 1MHz. The LTC7820’s powerful 1.1Ω N-channel MOSFET gate drivers maximize efficiency and can drive multiple MOSFETs in parallel for higher power applications. The LTC7820 monitors system voltage, current and temperature for faults, and uses a sense resistor for overcurrent protection. It stops switching and pulls the /FAULT pin low when a fault condition occurs. An onboard timer can be set for appropriate restart/retry times. The EXTVCC pin permits the LTC7820 to be powered from the lower voltage output of the converter or other available sources up to 40V, reducing power dissipation and improving efficiency. Additional features include soft switching for low EMI, a power good output signal, undervoltage lockout and internal charge balance circuitry.

space as possible. Infineon Technologies AG (FSE: IFX / OTCQX: IFNNY) supports this trend with its new power IC manufacturing technology SMART7. Infineon designed it specifically for automotive applications such as Body Control Modules or Power Distribution Centers. SMART7 power ICs drive, diagnose and protect loads in applications like heating, power distribution, air-conditioning, exterior and interior lighting, seat and mirror adjustment. They also provide a cost- effective and robust replacement of electromechanical relays and fuses. SMART7 is based on thin-wafer technology that reduces power losses and chip sizes. Based on SMART7, Infineon now introduces the two high- side power switch families PROFET™+2 and High Current PROFET™. The SPOC™+2 multichannel SPI high-side power controllers will follow within a year. “In this decade, we have delivered one billion PROFET+ switches, the predecessor family to PROFET+2,” saidAndreas Doll, Vice President and General Manager, Body Power Automotive at Infineon. “The SMART7 power ICs enable body and convenience applications with further enhanced protection schemes, lower power dissipation in smaller packages at less overall system cost for our customers.” PROFET+2 for double-digit reduction in power dissipation and PCB space The PROFET+2 family was developed for automotive 12 V lighting load applications and capacitive loads. These comprise e. g. halogen bulbs in external lighting control, interior lighting and dimming, as well as LED lighting. PROFET+2 devices provide state-of-the-art diagnostics and protection features. They maintain pin-out compatibility with their predecessor family PROFET+ for zero-cost migration. There is no ECU layout change needed, if single-channel devices are replaced by dual-channel variants and vice versa. Compared to their predecessor family, the PROFET+2 devices are up to 40 percent smaller in package size and improve energy efficiency with 50 percent lower current consumption. The lowest ohmic PROFET+2 device is the 8 mΩ dual-channel switch BTS7008- 2EPA with protection functions and diagnosis. High Current PROFETs for load currents up to 20 A DC in benchmark footprint The new High Current PROFETs extend the flexible family approach of PROFET+2 to on-state resistances R DS(ON) from 8 mΩ down to 2 mΩ in the same TSDSO-14 package. A High Current PROFET in a TSDSO-14 package with pin pitch of only 0.65 mm offers today’s world-lowest R DS(ON)

Infineon extends industry-leading smart power switches with PROFET™+2 and High Current PROFET™ for improved energy efficiency and miniaturization Car makers want in-vehicle electronic systems to provide a large number of energy-efficient functions in as little

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