NXP SSL4120

Description

The SSL4120 integrates a Power Factor Corrector (PFC) controller and a controller for a Half-Bridge resonant Converter (HBC) in a multi-chip IC. It provides the drive function for the discrete MOSFET in an up-converter and for the two discrete power MOSFETs in a resonant half-bridge configuration.Efficient PFC operation is achieved by implementing functions for Quasi-Resonant (QR) operation at high-power levels and QR with valley skipping at lower power levels.OverCurrent Protection (OCP), OverVoltage Protection (OVP) and demagnetization sensing ensure safe operation under all conditionsThe HBC module is a high-voltage controller for a zero-voltage switching LLC resonant converter. It contains a high-voltage level shift circuit and several protection circuits including OCP, open-loop protection, capacitive mode protection and a general purpose latched protection input.The high-voltage chip is fabricated using a proprietary high-voltage Bipolar-CMOS-DMOS power logic process enabling efficient direct start-up from the rectified universal mains voltage. The low-voltage Silicon-On-Insulator (SOI) chip is used for accurate, high-speed protection functions and control.The SSL4120 controlled PFC circuit and resonant converter topology is very flexible. It can be used for a broad range of applications over a wide mains voltage range.Combining PFC and HBC controllers in a single IC makes the SSL4120 ideal for controlling compact power supplies in lighting applications, such as LED drivers.Using the SSL4120, highly efficient and reliable power supplies providing over 100 W can be designed easily which use the minimum of external components.Remark: Unless otherwise stated, all values are typical.

Features

• Integrated PFC and HBC controllers
• Universal mains supply operation from 85 V to 305 V (AC)
• High level of integration resulting in a low external component count and a cost
• effective design
• Enable input to enable only the PFC or both the PFC and HBC controllers
• On-chip high-voltage start-up source
• Stand-alone operation or IC supplied from external DC source
• 2.2 PFC controller features
• Boundary mode operation with on-time control
• Valley/zero-voltage switching for minimum switching losses
• Frequency limiting to reduce switching losses
• Accurate boost voltage regulation
• Burst mode switching with soft-start and soft-stop
• 2.3 HBC controller features
• Integrated high-voltage level shifter
• Adjustable minimum and maximum frequency
• Maximum 500 kHz half-bridge switching frequency
• Adaptive non-overlap time
• Burst mode switching
• 2.4 Protection features
• Safe restart mode for system fault conditions
• General latched protection input for output overvoltage protection or external
• temperature protection
•  Protection timer for time-out and restart
• Overtemperature protection
• Soft (re)start for both controllers
• Undervoltage protection for mains (brownout), boost, IC supply and output voltage
• Overcurrent regulation and protection for both controllers
• Accurate overvoltage protection for the boost voltage
• Capacitive mode protection for the HBC controller

Typical applications

• The IC is used in all LED lighting applications that require very efficient, low Total
• The SSL4120 provides a cost-effective power supply solution between 25 W and 400 W.

More information

• Datasheet
• IC product information