The HV9910B includes a PWM dimming input that can accept an external control signal with a duty ratio of 0 - 100% and a frequency of up to a few kilohertz. It also includes a 0 - 250mV linear dimming input which can be used for linear dimming of the LED current. The HV9910B is ideally suited for buck LED drivers.
The oven temperature used to cook a beef roast is usually set somewhere between 300 degrees and 450 degrees Fahrenheit. The recommended cooking temperature for your roast is usually determined by the type of beef cut that you plan to roast.
Place the roast on a rack in a roasting pan, fat side up, and put the roast in the 450 degree preheated oven. Roast for 10 minutes, then RE-SET THE OVEN TEMPERATURE TO 250 DEGREES. Continue cooking for about 50-80 minutes or until the meat registers 150 degrees on a meat thermometer.lace the roast on a rack in a roasting pan, fat side up, and put the roast in the 450 degree preheated oven. Roast for 10 minutes, then RE-SET THE OVEN TEMPERATURE TO 250 DEGREES. Continue cooking for about 50-80 minutes or until the meat registers 150 degrees on a meat thermometer.