Renesas Electronics simplifies power design for surround view camera systems
To simplify power supply design for use in multiple HD camera modules, Renesas Electronics has developed the ISL78083, a highly integrated power management IC (PMIC). It is claimed to reduce development cycles, bill of materials cost and supply chain risks.
The automotive camera PMIC accepts direct-from-battery (36 to 42V) or power-over-coax (15 to 18V) supply sources and supports output currents up to 750mA per output. This power level allows room for existing image sensors up to 7Mpixel and future sensors with even higher resolution, says Renesas.
Niall Lyne, senior director, automotive business unit at Renesas, said: “Cameras designed with the ISL78083 are smaller and can be conveniently mounted in vehicle locations that provide the desired surround view camera angles without negatively impacting style or aerodynamics.”
The four-channel ISL78083 automotive camera PMIC includes a primary high-voltage synchronous buck regulator, two secondary low-voltage synchronous buck regulators, and a low-dropout (LDO) voltage regulator.
It has integrated feedback and integrated compensation, and requires only the output inductor and capacitors to complete the power supply. Switching at 2.2MHz avoids AM band interference and shrinks the required output capacitance and inductance, adds the company.
The ISL78083 requires seven to 10 less external components compared to competing solutions, claims Renesas. The ISL78083 also features four over-voltage and four under-voltage monitors, three power-good indicators and a reset output/fault indicator. A second reference is supplied for the over-voltage/under-voltage monitors.
An optional spread spectrum feature addresses EMC/EMI interference challenges while the wettable flank package improves reliability of solder connections and enables optical inspection of solder joints for lower cost manufacturing, Renesas maintains.
The AEC-Q100 Grade-1 qualified ISL78083 operates at an ambient temperature range of -40 to +125 degrees C and junction temperature from -40 to +150 degrees C.
Mass production quantities of the ISL78083 automotive camera PMIC are available now in a 4.0 x 4.0mm, 24-lead SCQFN wettable flank package.