Microchip Technology Intros MCP1630 PWM Controller
Microchip Technology Inc. (Chandler, AZ), a provider of microcontroller (MCU) and analog semiconductors, introduced its new MCP1630 power supply pulse-width modulation (PWM) controller, which enables power system designers to add precision control, digital communication and programmability for initial settings or an "on-the-fly" adjustment or calibration. It is suited for applications requiring medium-to-high levels of intelligence and operating at frequencies exceeding 200 kHz.
Typical applications include battery chargers for lithium-ion and nickel-metal hydride chemistries, intelligent power systems, brick dc-dc converters, ac power-factor correction, multiple output-power supplies and multiple-phase power supplies. The MCP1630 is comprised of a high-speed comparator with an error amplifier and a PWM latch to perform the analog power-supply PWM function. The device, when used in conjunction with a MCU, can support the development of high-speed, intelligent, power system controllers. The MCU adjusts the output voltage, switching frequency, maximum duty cycle and other features, making the power system intelligent and adaptable.
The MCP1630 can yield a power supply with advanced features, communications and programmability, and it supports all switch-mode power supply topologies. The device has internal protection, including under-voltage lockout, output short-circuit and over-temperature protection. It has a low operating current of 2.8 mA (typical) and fast output rise and fall times of 5.9 nsec and 6.2 nsec, respectively. In addition, the device has a precise peak-current limit of ±5% and a peak-current mode operation to 1 MHz.
Available in eight-pin MSOP package, the MCP1630 is priced at $0.98 in 1,000-unit quantities.
