5 Bit Programmable, Pulse-Width Modulator: 1kHz, 5kHz, 10kHz, and 25kHz

The DS1050 is a programmable, 5-bit, pulse-width modulator featuring a 2-wire addressable controlled interface. The DS1050 operates from power supplies ranging from 2.7V up to 5.5V. The PWM output provides a signal that swings from 0V to VCC. The DS1050 requires a typical operating current of 50µA and a programmable shutdown supply current of 1µA.

Four standard PWM output frequencies are offered and include 1kHz, 5kHz, 10kHz, and 25kHz. The 2-wire addressable interface allows operation of multiple devices on a single 2-wire bus and provides compatibility with other Dallas Semiconductor 2-wire devices such as real-time clocks (RTCs), digital thermometers, and digital potentiometers.

The device is ideal for low-cost LCD contrast and/or brightness control, power supply voltage adjustment, and battery charging or current adjustment. The DS1050 is offered in standard integrated circuit packaging including the 8-pin (150-mil) SOIC and space-saving 8-pin (118-mil) µSOP.

Applications

* Automated Test Equipment (ATE) * Battery Chargers * Building Energy Management (HVAC) * LCD Displays and Panels * Motor and Motion Control * Power Supplies * Sensors - Temperature

* Single 5-bit, programmable, pulse-width modulator (PWM)

* Adjustable Duty Cycle: 0% to 100%

* 2.7V to 5.5V Operation

* Standard Frequency Values: 1kHz, 5kHz, 10kHz, and 25kHz

* 2-Wire Addressable Interface

* Packages: 8-Pin (150-mil) SOIC and 8-Pin (118-mil) µSOP

* Operating Temperature: -40°C to +85°C