Catalog
Automotive 30V, 1MHz current mode PWM controller
Key Features
• Qualified for Automotive ApplicationsAEC-Q100 Qualified With the Following Results:Device Temperature Grade 1: –40°C to 125°CAmbient Operating Temperature RangeDevice HBM Classification Level 2: ±2 kVDevice CDM Classification Level C4B: 750 VUltra Low Start-up Current (25 µA maximum)Current Mode ControlSkip Cycle Mode for Low Standby PowerSingle Resistor Programmable OscillatorSynchronizable OscillatorAdjustable Soft-StartIntegrated 0.7 A Peak Gate DriverDirect Opto-Coupler InterfaceMaximum Duty Cycle Limiting (80% for LM5021-1 or 50%for LM5021-2)Slope Compensation (LM5021-1 Only)Under Voltage Lockout (UVLO) with HysteresisCycle-by-Cycle Over-Current ProtectionHiccup Mode for Continuous Overload ProtectionLeading Edge Blanking of Current Sense SignalPackage: VSSOP-8Qualified for Automotive ApplicationsAEC-Q100 Qualified With the Following Results:Device Temperature Grade 1: –40°C to 125°CAmbient Operating Temperature RangeDevice HBM Classification Level 2: ±2 kVDevice CDM Classification Level C4B: 750 VUltra Low Start-up Current (25 µA maximum)Current Mode ControlSkip Cycle Mode for Low Standby PowerSingle Resistor Programmable OscillatorSynchronizable OscillatorAdjustable Soft-StartIntegrated 0.7 A Peak Gate DriverDirect Opto-Coupler InterfaceMaximum Duty Cycle Limiting (80% for LM5021-1 or 50%for LM5021-2)Slope Compensation (LM5021-1 Only)Under Voltage Lockout (UVLO) with HysteresisCycle-by-Cycle Over-Current ProtectionHiccup Mode for Continuous Overload ProtectionLeading Edge Blanking of Current Sense SignalPackage: VSSOP-8
Description
AI
The LM5021 off-line pulse width modulation (PWM) controller contains all of the features needed to implement highly efficient off-line single-ended flyback and forward power converters using current-mode control. The LM5021 features include an ultra-low (25 µA) start-up current, which minimizes power losses in the high voltage start-up network. A skip cycle mode reduces power consumption with light loads for energy conserving applications (ENERGY STAR®, CECP, and so forth). Additional features include under-voltage lockout, cycle-by-cycle current limit, hiccup mode overload protection, slope compensation, soft-start and oscillator synchronization capability. This high performance 8-pin IC has total propagation delays less than 100 ns and a 1-MHz capable oscillator that is programmed with a single resistor.
The LM5021 off-line pulse width modulation (PWM) controller contains all of the features needed to implement highly efficient off-line single-ended flyback and forward power converters using current-mode control. The LM5021 features include an ultra-low (25 µA) start-up current, which minimizes power losses in the high voltage start-up network. A skip cycle mode reduces power consumption with light loads for energy conserving applications (ENERGY STAR®, CECP, and so forth). Additional features include under-voltage lockout, cycle-by-cycle current limit, hiccup mode overload protection, slope compensation, soft-start and oscillator synchronization capability. This high performance 8-pin IC has total propagation delays less than 100 ns and a 1-MHz capable oscillator that is programmed with a single resistor.
