Renesas Electronics Corporation

The ISL15102 is a single port differential line driver developed for Power Line Communication (PLC) applications. The device is designed to drive heavy line loads while maintaining a high level of linearity required in Orthogonal Frequency Division Multiplexing (OFDM) PLC modem links. The ISL15102 has a disable control pin (DIS). In Disable mode, the line driver goes into Low Power mode and the outputs maintain a high impedance in the presence of high receive signal amplitude, improving TDM receive signal integrity. The ISL15102 has built-in thermal protection. When the internal temperature reaches +150°C (typical) the driver shuts down to prevent damage to the device. An internal input CM buffer maximizes the dynamic range and reduces the number of external components in the application circuit. The ISL15102 is supplied in a thermally-enhanced small footprint (4mmx5mm) 24 Ld QFN package. The ISL15102 is specified for operation across the -40°C to +105°C operating ambient temperature range.

The ISL1539A provides 4 internal wideband op amps intended to be used as two pairs of differential line drivers. The ISL1539As high bandwidth, 240MHz, and ultra low distortion, -89dBc @ 1MHz, 2VP-P, support the demanding MTPR requirements of emerging VDSL2 line driver designs. Less demanding requirements can be met at very low quiescent powers using the supply current adjustment features. Each of the 4 internal op amps is a wideband current feedback amplifier offering very high slew rate intrinsic to that design using low quiescent current levels. Each of the two pair of amplifiers (ports) can also be power optimized to the application using two external quiescent control logic pins. Full power is nominally 27. 2mA/port with options of medium power cutback to 23mA/port, a low power condition at 13. 5mA/port, and an off state at 0. 5mA/port. Added quiescent power flexibility is provided through an external IADJpin. Grounding the pin gives the nominal currents listed above while inserting a resistor from this pin to ground can be used to scale each of the settings downward. High power push/pull line driver applications as illustrated in the example below are best supported using a low headroom, high output current device. On ±12V supplies, the ISL1539A offers a 1. 1V headroom with >360mA peak output current. Driving differentially this gives >41. 8VP-Pswing to as low as 58Ω differential load. High SFDR operation is also supported for supplies as low as ±7. 5V. Intended to be used as differential pairs, this two port device includes special circuitry to minimize common mode loop peaking while also reducing the common mode output noise spectrum. That circuitry links the two sides of each port, precluding their application as individual amplifiers.

The ISL1557A is a dual operational amplifier designed for VDSL2 and ADSL line driving in DMT based solutions. This device features a high drive capability of 750mA while consuming only 6mA of supply current per amplifier and operating from a single 4. 5V to 12V supply. The driver achieves a typical distortion of -80dBc at 150kHz into a 25Ω load. The ISL1557A is designed with stronger output clamps to enhance protection against lightning transients. The ISL1557A is available in the thermally-enhanced 16 Ld QFN and 10 Ld HMSOP package and is specified for operation over the full -40°C to +85°C temperature range. The ISL1557A has two control pins (C0and C1) for controlling the bias and enable/disable of the outputs. These controls allow for lowering the power to fit the performance/power ratio for the application. The ISL1557A is ideal for ADSL2+, SDSL, HDSL2, and VDSL line driving applications, including both 14. 5dBm and 21dBm applications.

The ISL1571 is a dual operational amplifier designed for PLC line driving in Orthogonal Frequency-Division Multiplexing (OFDM) and Spread Spectrum Communication (SSC) based solutions. This device features a high drive capability of 750mA while consuming only 6mA of supply current per amplifier and operating from a single 4. 5V to 12V supply. The driver achieves a typical distortion of -80dBc, at 150kHz into a 25Ω load. The ISL1571 is available in the thermally-enhanced 16 Ld QFN or 10 Ld HMSOP package and is specified for operation across the full -40°C to +85°C temperature range. The ISL1571 has control pins BIAS0 and BIAS1 for controlling the bias and enable/disable of the outputs. These controls allow for lowering the power to fit the performance/power ratio for the application. The ISL1571 is ideal for line driving applications following the Homeplug 1. 0, Homeplug AV and UPA standard based PLC.

The ISL1591 provides 4 internal wideband op amps intended to be used as two pairs of fixed gain differential line drivers. The ISL1591s high bandwidth, and ultra low distortion enables the support of VDSL2 8b, 17a, and 30a in central office modem applications. This highly versatile line driver allows for operation from +14V to +24V nominal power supplies, while delivering exceptional MTPR distortion performance. Using a single +24V supply, the ISL1591 MBPR distortion is below -62dBc in VDSL2 8b, -63dBc in VDSL2 17a, and -60dBc in VDSL2 30a profiles. Using a single +14V supply, ISL1591 supports 14. 5dBm VDSL2 17a and 30a profiles at only a power consumption of 425mW. This capability is ideal for short loop, high bit rate VDSL2 applications where 14. 5dBm transmit power is all that is required. For full power VDSL2 8b profile with 20dBm of transmit power, the line driver will require +24V single supply. Each of the 4 internal op amps is a wideband current feedback amplifier offering very high slew rate intrinsic to that design using low quiescent current levels. Each of the two pair of amplifiers (ports) can also be power optimized to the application using two external quiescent control logic pins. Full power is nominally 14mA/port with options of medium power cutback to 9. 7mA/port, a low power condition at 7. 4mA/port, and an off state at 0. 5mA/port. High power push/pull line driver applications are best supported using a low headroom, high output current device. On +24V supplies, the ISL1591 offers a 1. 6V headroom with >360mA peak output current. Driving differentially, this gives >42. 4VP-Pswing to as low as 58Ω differential load. The four amplifiers in ISL1591 are intended to be used as differential pairs and not as individual amplifiers.

The ISL1801 is a power management IC (PMIC) optimized for solar array micro converters and other systems operating from a high voltage DC supply. The ISL1801 can be used in buck, boost or buck-boost microconverter topologies in order to maximize the energy harvest from a solar array. In addition to the power stage and main controller, the ISL1801 includes the bias regulators, gate drivers, current sense amplifier and comparators needed for micro converters. The ISL1801 integrates two switching regulators that can be used to generate the driver and the micro-controller (MCU) power supplies. In addition, it has a low offset, low drift amplifier for current sensing, two comparators for overvoltage and overcurrent protection plus a watchdog timer to reset the MCU if necessary. This single IC solution offers high integration and dramatically reduces the total number of components in the microconverter system improving the system reliability and reducing cost. The first regulator takes input voltages ranging from 9V to 90V from the solar panel and outputs a regulated supply for drivers and the secondary regulator. The secondary regulator converts the output of the first regulator to a programmable micro-controller supply, typically 3. 3V. A high voltage start-up LDO provides the necessary bias voltage until the switching regulator is operating. The ISL1801 integrates two high-speed MOSFET drivers for buck, flyback or boost converters configured as shown in the application schematics. The Drive3 also has the integrated peak current limiting capabilities. The ISL1801 includes comprehensive start-up, shutdown and fault logic to ensure reliable operation of micro converters in solar applications.