Synchronous PWM controllers
26 May 2010
Analogue, Mixed Signal, LSI
ON Semiconductor recently introduced three new flexible synchronous pulse width modulation (PWM) controller devices – the NCP3020A, NCP3020B and NCP3011. Offering a wide input voltage range from 4,7 V to 28 V, these devices enable the flexibility to be used with a variety of input sources in consumer electronic equipment such as set-top-boxes and LCD televisions, as well as industrial and computing applications including printers, scanners and telecom systems.
The devices provide a 1 A integrated gate drive and are capable of producing output voltages as low as 0,6 V (NCP3020A and NCP3020B) and 0,8 V (NCP3011).
The NCP3011 also provides a buffered +1,25 V reference voltage which can be used as a low dropout (LDO) controller for one or two additional outputs. An internal oscillator sets the operating frequencies of 300 kHz (NCP3020A), 600 kHz (NCP3020B) and 400 kHz (NCP3011). A regulated digital soft-start limits in-rush current.
All three of the new PWM controllers feature an externally compensated transconductance error amplifier capable of being used with all ceramic output capacitors or electrolytic capacitors. Also included are an integrated boost diode that helps to reduce overall system size and cost, and an integrated boost drive clamp to regulate the driver supply voltage to 7,6 V to allow the use of lower voltage/higher efficiency MOSFETs. An enhanced suite of protection features includes lossless current limit, short circuit protection, output over-voltage protection, output under-voltage protection and input under-voltage lockout.
The NCP3011 includes a number of additional features such as dual level power-good, an enable/disable pin and external synchronisation. The external synchronisation allows two controllers to operate 180° out of phase for reduced input capacitance and system cost savings, as well as offering the ability to synchronise to a higher switching frequency.
For more information contact Robin Scholes, Avnet Kopp, +27 (0)11 809 6100, [email protected], www.avnet.co.za
Further reading:
High-performance IMU
RS South Africa
Analogue, Mixed Signal, LSI
TDK Corporation has announced availability of the new InvenSense SmartMotion ICM-536xx family of high-performance 6-axis IMUs.
Read more...
High-temperature closed-loop MEMS accelerometer
RS South Africa
Analogue, Mixed Signal, LSI
This sensor from TDK is a high-temperature MEMS accelerometer with ±14 g input range and a digital interface for measurement while drilling applications.
Read more...
Dual accelerometers on the same die
Altron Arrow
Analogue, Mixed Signal, LSI
The LSM6DSV320X is the first mainstream inertial sensor to house a gyroscope alongside two accelerometers, one capable of sensing up to ±16 g and one sensing up to a staggering ±320 g.
Read more...
Dual-range IMU with edge processing
EBV Electrolink
Analogue, Mixed Signal, LSI
ST’s innovative LSM6DSV80X combines two accelerometer structures for 16 g and 80 g full-scale sensing, a gyroscope up 4000 dps, and embedded intelligence in a single component.
Read more...
High-reliability isolation amplifiers
EBV Electrolink
Analogue, Mixed Signal, LSI
The VIA series of isolation amplifiers from Vishay are designed to deliver exceptional thermal stability and precise measurement capabilities.
Read more...
Mibbo QT2C Series signal isolators
Conical Technologies
Analogue, Mixed Signal, LSI
The Mibbo QT2C Series isolators support a rich combination of input and output signals, working with either current loops or voltage levels.
Read more...
IMU with dual-sensing capability
EBV Electrolink
Analogue, Mixed Signal, LSI
ST’s 6-axis inertial measurement unit integrates a dual accelerometer up to 320g and embedded AI for activity tracking and high-impact sensing.
Read more...
Plural data converter series
Analogue, Mixed Signal, LSI
Silanna Semiconductor has announced the launch of Plural, a new generation of data converters for customers eager to find a more available, affordable, high-performance alternative to existing brands.
Read more...
Precision JFET op-amp
Altron Arrow
Analogue, Mixed Signal, LSI
The specifications of the ADA4620 make it optimal as a front-end amplifier in a data-acquisition system, or for a TIA circuit with high input impedance.
Read more...
A new era in modular I/O solutions
Rugged Interconnect Technologies
Analogue, Mixed Signal, LSI
Aerospace and defence system designers are demanding scalable and high-performance I/O solutions and while traditional mezzanine standards have proven reliable, they often fall short of meeting modern bandwidth, size, and flexibility requirements.
Read more...
printer friendly version