Resonant power supply controller IC with PFC for LED lighting

Topologie: PFC
Eingangsspannung (min.): 90.00 V
Eingangsspannung (max.): 300.00 V
Schaltfrequenz (min.): 300.00 kHz
Schaltfrequenz (max.): 460.00 kHz
Ausgang 1: 60.00 V / 1.500 A
Ausgang 2: 48.00 V / 1.900 A

Erstveröffentlichung am 21.06.2012, Version 2..1 vom


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.


  • 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


  Artikel Nr. SPEC Produktserie IR 1
RDC1 max.
(V (AC))
(V (AC))
IR 1
Montageart LR
fres 1
744841247 PDF WE-CMB NiZn Stromkompensierte Netzdrossel 2 47 40 250 1500
744823220 PDF WE-CMB Stromkompensierte Netzdrossel 1.5 20 270 250 1500
750312186 PDF MID-LLIT Inductors for Lighting Applications 90 696 0.128 2 20.83 24.64 11.43 THT
750313715 PDF Power Inductor
760806110 PDF PFC Transformer
7446122001 PDF WE-LF Stromkompensierte Netzdrossel 2 1 0.06 250 1500
7446221012 PDF WE-LF Stromkompensierte Netzdrossel 1.2 12 0.28 250 1500
744131 PDF WE-SI Speicherdrossel 5.2 34 0.038 17 11 12 19 1.8 11
744136 PDF WE-SI Speicherdrossel 3.8 346 0.14 31 15 12 215 1.5 3.3