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歷史記錄
瀏覽器自帶分享功能也很好用哦~Typical Application
General Description
LZC3103 is a high performance, resonant mode double-ended controller specific for DCDC application using LLC half-bridge resonant converter. It provides 50% complementary duty cycle: the high-side switch and the low-side switch are driven on/off 180° out-of-phase for exactly the same time. The controller modulates the operation frequency to perform output voltage regulation. A novel method of MOSFETS zero voltage detection and adaptive deadtime inserted between the turn-off of either MOSFET and the turn-on of the other one, which can guarantee the soft-switching, low EMI emissions and high efficiency. LZC3103 provides process of soft-start, which make the switching frequency starts from a preset maximum value and then decays to the steady-state value determined by the control loop, to prevent hard-switchingduring start up. Programable burst-mode control with no or very light load，which can minimizing magnetizing current losses and frequency-related losses, to realized energy saving specifications. The special function of current foldback with temperature is to keep the system working in high temperature environment. This highly integrated controller implements frequency modulation control with SOP16 package, it simplifies the system design. The internal oscillator supports the switching frequencies from 40kHz to 400kHz. The LZC3103 provides complete system protection functions including capacitive-mode detection, half-bridge line under voltage protection, load over current protection (OCP), VCC under voltage lock-out(UVLO), VCC over voltage protection, and over temperature protection.
Main Features
Symmetrical duty cycle, variable frequency control of LLC converter
High accuracy oscillator
Adaptive dead-time for best efficiency
Programable soft-start
Programable minimum and maximum work frequency
Primary-side constant current mode
Capacitive-mode detection
Burst-mode for light load
Programmable current foldback function
Provides complete protection functions:
? Input under voltage protection
? VDD over voltage protection
? Output over voltage protection
? Output short circuit protection
? Capacitance mode protection
? High-side gate driver under voltage protection
?Over temperature protection with hysteresis
Application
◆100-W to 1-kW Power Supplies
◆ LCD supplies
◆ LED lighting
◆High power battery charger.
Typical Application
General Description
LZC3103 is a high performance, resonant mode double-ended controller specific for DCDC application using LLC half-bridge resonant converter. It provides 50% complementary duty cycle: the high-side switch and the low-side switch are driven on/off 180° out-of-phase for exactly the same time. The controller modulates the operation frequency to perform output voltage regulation. A novel method of MOSFETS zero voltage detection and adaptive deadtime inserted between the turn-off of either MOSFET and the turn-on of the other one, which can guarantee the soft-switching, low EMI emissions and high efficiency. LZC3103 provides process of soft-start, which make the switching frequency starts from a preset maximum value and then decays to the steady-state value determined by the control loop, to prevent hard-switchingduring start up. Programable burst-mode control with no or very light load，which can minimizing magnetizing current losses and frequency-related losses, to realized energy saving specifications. The special function of current foldback with temperature is to keep the system working in high temperature environment. This highly integrated controller implements frequency modulation control with SOP16 package, it simplifies the system design. The internal oscillator supports the switching frequencies from 40kHz to 400kHz. The LZC3103 provides complete system protection functions including capacitive-mode detection, half-bridge line under voltage protection, load over current protection (OCP), VCC under voltage lock-out(UVLO), VCC over voltage protection, and over temperature protection.
Main Features
Symmetrical duty cycle, variable frequency control of LLC converter
High accuracy oscillator
Adaptive dead-time for best efficiency
Programable soft-start
Programable minimum and maximum work frequency
Primary-side constant current mode
Capacitive-mode detection
Burst-mode for light load
Programmable current foldback function
Provides complete protection functions:
? Input under voltage protection
? VDD over voltage protection
? Output over voltage protection
? Output short circuit protection
? Capacitance mode protection
? High-side gate driver under voltage protection
?Over temperature protection with hysteresis
Application
◆100-W to 1-kW Power Supplies
◆ LCD supplies
◆ LED lighting
◆High power battery charger.
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