NXP公司的SSL4120是一款集成功率因數(shù)修正控制器和半橋諧振轉(zhuǎn)換器控制器的多芯片集成電路芯片。它提供的驅(qū)動(dòng)功能包括一個(gè)上升變換器驅(qū)動(dòng)分立MOSFET和一個(gè)諧振半橋驅(qū)動(dòng)兩個(gè)分立功率MOSFET的配置。本文首先介紹芯片的簡介、特性、內(nèi)部框圖及應(yīng)用領(lǐng)域，并給出相應(yīng)設(shè)計(jì)方案的設(shè)計(jì)原理圖、元器件列表及PCB元件布局圖。
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 conditions
The 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.
SSL4120主要特性：
General 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
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
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
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
SSL4120應(yīng)用：
The IC is used in all LED lighting applications that require very efficient, low Total Harmonic Distortion (THD), high Power Factor (PF) and a universal mains input voltage.
The SSL4120 provides a cost-effective power supply solution between 25 W and 400 W.
圖1. SSL4120內(nèi)部方框圖
SSL4120方案介紹：
The SSL4120DB1123 is a dimmable global mains 90 W LED driver demo board featuring the NXP Semiconductors SSL4120T IC.
The board has a two-stage (PFC + resonant) topology to achieve good THD performance (mains current class C compliance) over a wide mains input voltage range and output power range.
The SSL4120DB1123 can drive a large LED voltage/current range.
Features and benefits
• Efficient PFC and LLC topology
• Large input voltage range
• Short turn-on delay time
• Low mains current harmonics
• LLC stage with large output voltage range
• Dimmable
• Single layer PCB 146 x 60 mm, wave soldering
SSL4120方案原理圖：
圖2. SSL4120方案原理圖
SSL4120方案材料清單：
PCB元件布局圖：
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