CD5021 & LM5021 Current-Mode PWM Controller Chip
Update date：2024/5/10 Number of views：
Brand： CD5021 model： LM5021 market value： 96 concessional rate： 92
Trait：CD5021 off-line Pulse-width Modulation (PWM)controller contains all of the features needed toimplement highly efficient off-line single-endedflyback and forward power converters usingcurrent-mode control.The CD5021 features include an ultra-low start-upcurrent, which minimizes power losses in the highvoltage start-up network. A skip cycle modereduces power consumption with light loads forenergy
Product introduction
CD5021 off-line Pulse-width Modulation (PWM)controller contains all of the features needed toimplement highly efficient off-line single-endedflyback and forward power converters usingcurrent-mode control.The CD5021 features include an ultra-low start-upcurrent, which minimizes power losses in the highvoltage start-up network. A skip cycle modereduces power consumption with light loads forenergy conserving applications. Additional featuresinclude under-voltage lockout, cycle-by-cyclecurrent limit, hiccup mode overload protection,slope compensation, soft-start and oscillatorsynchronization capability. CD5021 has totalpropagation delays less than 100 ns and a 1 MHzcapable oscillator that is programmed with a singleresistor.
Ultra-low Startup Current (25 μA Maximum)
Current Mode Control
Skip Cycle Mode for Low Standby Power
Single Resistor Programmable Oscillator
Synchronizable Oscillator
Adjustable Soft-Start
Integrated 0.7A Peak Gate Driver
Direct Opto-Coupler Interface
Maximum Duty Cycle Limiting 80%
Slope Compensation
Cycle-by-Cycle Overcurrent Protection
Hiccup Mode for Continuous Overload Protection
Leading Edge Blanking of Current Sense Signal
Packages: VSSOP8
