CS51221
CS51221 is PWM Controller manufactured by onsemi.
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 50 m A startup current, over and undervoltage protection, and bidirectional synchronization. The CS51221 is available in a 16 lead SOIC 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 n F Load)
- 3.3 V 3% Reference Voltage Output
- These Devices are Pb- Free and are Ro HS pliant
DATA SHEET .onsemi.
16 1
SOIC- 16 D SUFFIX CASE 751B- 05
PIN CONNECTIONS AND MARKING DIAGRAM
1 GATE ISENSE SYNC
UV OV
RTCT ISET
CS51221 AWLYWW
16 VC PGND VCC VREF LGND SS
VFB x
= Specific Device Code
= Assembly Location
WL = Wafer Lot
= Year
WW = Work Week
= Pb- Free Package
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