CS51023

Features:

`75A Max. Startup Current
`Fixed Frequency Current Mode Control
`1MHz Switching Frequency
`Undervoltage Protection Monitor
`Overvoltage Protection Monitor with Programmable Hysteresis
`Programmable Dual Threshold Overcurrent Protection with Delayed Restart
`Programmable Soft Start
`Accurate Maximum Duty Cycle Limit
`Programmable Slope Compensation
`Leading Edge Current Sense Blanking
`1A Sink/Source Gate Drive
`Bidirectional Synchronization (CS51021/23)
`50ns PWM Propagation Delay
`100A Max Sleep Current (CS51022/24)


Pinout




Specifications

Power Supply Voltage, V_CC ............................................................................................-0.3V, 20V
Driver Supply Voltage, V_C ..............................................................................................-0.3V, 20V
SYNC, SLEEP, R_TC_T, SOFT START, V_FB, SLOPE, I_SENSE, UV, OV, I_SET (Logic Pins)......-0.25V to VREF
Peak GATE Output Current.........................................................................................................1A
Steady State Output Current..............................................................................................± 0.2A
Operating Junction Temperature, T_J...................................................................................150°C
Storage Temperature Range, T_S..............................................................................-65 to 150°C
ESD (Human Body Model).........................................................................................................2kV
Lead Temperature Soldering: Reflow (SMD styles only)..60 sec. max above 183°C, 230°C peak


Description

The CS51021/22/23/24 Fixed Frequency PWM Current Mode Controller family provides all necessary features required for AC-DC or DC-DC primary side control. Several features are included eliminating the additional components needed to implement them externally. In addition to low start-up current (75A) and high frequency operation capability, the CS51021/ 22/23/24 family includes overvoltage and undervoltage monitoring, externally programmable dual threshold overcurrent protection, current sense leading edge blanking, current slope compensation, accurate duty cycle control and an externally available 5V reference. The CS51021 and CS51023 feature bidirectional synchronization capability, while the CS51022 and CS51024 offer a sleep mode with 100A maximum IC current consumption. The CS51021/22/23/24 family is available in a 16 lead narrow body SO package.