Renesas Electronics Corporation

The ISL76671 is a low cost, light-to-voltage silicon optical sensor combining a photodiode array, a non-linear current amplifier and a micro-power op amp on a single monolithic IC. Similar to the human eye, the photodiode array has peak sensitivity at 550nm and spans the wavelength range 400nm to 600nm, rejecting UV and IR light. The input luminance range is from 0.01 lux to 100 lux. The integrated non-linear current amplifier boosts and converts the photodiode signal into a square root output format, extending dynamic range while maintaining excellent sensitivity in dimly lit conditions. As such, the part is ideal for measuring incident daylight when mounted behind heavily smoked bezels used around displays or behind mirrors. The device consumes minimum power. A dark current compensation circuit minimizes the effect of temperature dependent leakage currents in the absence of light, improving the light sensitivity at low lux levels. The output gain has been optimized to require a relatively low value external bias resistor that falls within recommended automotive EMI limits. The built-in 1μA op amp gives the ISL76671 an output voltage driving advantage for heavier loads that can drive an ADC directly. The ISL76671 is housed in an ultra-compact 2mm x 2.1mm ODFN plastic surface mount package. Operation is rated from -40 °C to +105 °C, Grade 2 per AEC-Q100.

The ISL76683 is an integrated light sensor with an internal integrating ADC intended for automotive applications. The ADC provides 16-bit resolution and is capable of rejecting 50Hz and 60Hz flicker caused by artificial light sources. The I2C interface provides four user-programmable lux sensitivity ranges for optimized counts/lux in a variety of lighting conditions. The I2C interface also provides multi-function control of the sensor and remote monitoring capabilities. In normal operation, power consumption is less than 300μA. Furthermore, a software power-down mode controlled with the I2C interface reduces power consumption to less than 1μA. The ISL76683 supports twin (upper and lower) user-programmed thresholds and provides a hardware interrupt that remains asserted low until the host clears it with the I2C control interface. The ISL76683 is designed to operate on supplies from 2.5V to 3. 3V and is AEC-Q100 qualified and specified for operation across the -40 °C to +105 °C (Grade 2) ambient temperature range. To achieve this, the ISL76683 is packaged in a special extended temperature clear package.

The ISL78083 is a versatile multi-rail power IC comprised of a primary high voltage synchronous buck regulator, two secondary low voltage synchronous buck regulators, and an LDO regulator. It also offers four overvoltage and undervoltage monitors, three power-good indicators, and a reset output/fault indicator. To limit common-cause failures, the ISL78083 also includes a second reference for the OV/UV monitors, independent from the reference of the regulators. The ISL78083 is intended for high-density power applications, requiring few external components and minimal board space. It offers an extensive feature set configured using internal One-Time Programmable (OTP) memory. Nearly all device options, such as each output voltage selection, power sequencing, and OV/UV thresholds are internally configured and require no external components for selection. The regulators also offer internal compensation. The bucks are synchronous to achieve high efficiency and are capable of operating in harsh environments requiring high ambient temperature. ISL78083 is available in a 4mmx4mm 24 Ld Step Cut QFN (SCQFN) package with an exposed pad for improved thermal performance. It is AEC-Q100 qualified to Grade 1 and operates across an ambient temperature range of -40°C to 125°C and is electrically specified across a junction temperature range of -40°C to 150°C.

The ISL78100 is a high-power LED backlight driver with an integrated 36V FET designed to drive up to 8 high-power LEDs in series. The PWM converter runs from an internally generated 1MHz clock. With efficiencies over 90%, the regulator provides tight control of LED current and may be configured in either boost or buck topologies, allowing from 3 to 8 series diodes to be driven from wide input voltages. LED light level may be controlled either by:

The ISL78171 is a 6-channel, 50mA, LED driver capable of very high dynamic range dimming. It offers an integrated boost converter, six high precision, adjustable current sinks and a SMBus/I2C interface for digital programmability and extensive diagnostics. These features provide the ISL78171 with the capabilities to design a compact, highly versatile LED backlight for a wide variety of ambient lighting conditions. The integrated peak current mode PWM boost converter operates with a constant frequency and can boost an input voltage range of 4. 5V - 26. 5V to an output up to 40V and supply six strings of LEDs with up to 50mA each. A dynamic headroom control circuit detects and regulates the highest voltage string to improve efficiency in multistring configurations. The six high precision adjustable current sinks offer typical current matching better than ±1% and a dimming ratio capable of exceeding 60, 000:1. The dimming ratio can be adjusted with either or both the I2C/SMBus and an external PWM signal. They also feature an optional channel phase shift control which helps to reduce the input and output capacitance and ripple, to improve efficiency and to prevent audible noise. The SMBus/I2C interface offers a wide range of programmability that includes the boost FET slew rate control, individual string enabling, and converter switching frequency selections. It offers a wide range of protection features and diagnostics that cover all perceivable faults, enabling the system to self-diagnose the functioning of the backlight and react to such conditions as failed LEDs. The ISL78171 is offered in a compact and thermally efficient 20 Ld QFN package with an ambient temperature range of -40°C to +105°C.

The ISL78200 is a synchronous buck controller with a 90mΩ high-side MOSFET and low-side driver integrated. The ISL78200 supports wide input range of 3V to 40V in buck mode. It supports 2. 5A continuous load under conditions of 5V VOUT, VINrange of 8V to 36V, 500kHz and +85°C ambient temperature with still air. For any specific application, the actual maximum output current depends upon the die temperature not exceeding +125°C with the power dissipated in the IC, which is related to input voltage, output voltage, duty cycle, switching frequency, ambient temperature and board layout, etc. Refer to section "Output Current" on page 14 for more details. The ISL78200 has flexible selection of operation modes of forced PWM mode and PFM mode. In PFM mode, the quiescent input current is as low as 300µA and can be further reduced to 180µA with AUXVCC connected to VOUTunder 12V VIN and 5V VOUTapplication. The load boundary between PFM and PWM can be programmed to cover wide applications. The low-side driver can be either used to drive an external low-side MOSFET for a synchronous buck, or left unused for a standard non-synchronous buck. The low-side driver can also be used to drive a boost converter as a pre-regulator that greatly expands the operating input voltage range down to 2. 5V or lower (refer to "Typical Application Schematic III - Boost Buck Converters" on page 5). The ISL78200 offers the most robust current protections. It uses peak current mode control with cycle-by-cycle current limiting. It is implemented with frequency foldback under current limit condition; in addition, the hiccup overcurrent mode is also implemented to guarantee reliable operations under harsh short conditions. The ISL78200 has comprehensive protections against various faults including overvoltage and over-temperature protections, etc.

The ISL78201 is an AEC-Q100 qualified 40V, 2. 5A synchronous buck or boost buck controller with a high-side MOSFET and low-side driver integrated. In Buck mode, the ISL78201 supports a wide input range of 3V to 40V. In Boost-Buck mode, the input range can be extended down to 2. 5V and output regulation can be maintained when VINdrops below VOUT, enabling sensitive electronics to remain on during cold-cranking and start-stop applications. The ISL78201 has a flexible selection of operation modes including forced PWM mode and an optional switch to PFM mode for light loads. In PFM mode, the quiescent input current is as low as 300µA and can be further reduced to 180µA with AUXVCC connected to VOUTunder 12V VINand 5V VOUTapplication. The load boundary between PFM and PWM can be programmed to cover wide applications. The low-side driver can be either used to drive an external low-side MOSFET for a synchronous buck, or left unused for a standard non-synchronous buck. The low-side driver can also be used to drive a boost converter as a preregulator that greatly expands the operating input voltage range down to 2. 5V or lower. The ISL78201 offers the most robust current protections. It uses peak current mode control with cycle-by-cycle current limiting. It is implemented with frequency foldback undercurrent limit condition; in addition, the hiccup overcurrent mode is also implemented to guarantee reliable operations under harsh short conditions. The ISL78201 has comprehensive protections against various faults including overvoltage and over-temperature protections, etc.