CS51221 ,Enhanced Voltage Mode PWM ControllerELECTRICAL CHARACTERISTICS (continued) (–40°C < T < 85°C; –40°C < T < 125°C; 3.0 V < V < 15 V; 4.7 ..
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CS51221
Enhanced Voltage Mode PWM Controller
CS51221
Enhanced Voltage Mode
PWM Controller
The CS51221 fixed frequency feed forward voltage mode PWM
controller contains all of the features necessary for basic voltage mode
operation. This PWM controller has been optimized for high
frequency primary side control operation. In addition, this device
includes such features as: Soft Start, accurate duty cycle limit control,
less than 50μA startup current, over and under voltage protection, and
bidirectional synchronization. The CS51221 is available in a 16 lead
SO narrow surface mount package.
Features• 1.0 MHz Frequency Capability Fixed Frequency Voltage Mode Operation, with Feed Forward Thermal Shutdown Undervoltage Lock–Out Accurate Programmable Max Duty Cycle Limit 1.0 A Sink/Source Gate Drive Programmable Pulse–By–Pulse Overcurrent Protection Leading Edge Current Sense Blanking 75 ns Shutdown Propagation Delay Programmable Soft Start Undervoltage Protection Overvoltage Protection with Programmable Hysteresis Bidirectional Synchronization 25 ns GATE Rise and Fall Time (1.0 nF Load) 3.3 V 3% Reference Voltage Output
