IDP2308
Digital Multi-Mode PFC + LLC Combo Controller
Datasheet 2 Rev. V2.3, 2018-08-13
Digital Multi-Mode PFC + LLC Combo Controller ............................................................................. 1
1 Pin Configuration and Description ................................................................................ 4
2 Representative Blockdiagram ...................................................................................... 6
3 Functional Description ................................................................................................ 7
3.1 Introduction ......................................................................................................................................... 7
3.2 Overview Controller Features ............................................................................................................. 7
3.3 Overview Controller Features ............................................................................................................. 7
3.3.1 System and Device overview ........................................................................................................ 8
3.3.1.1 Processor and memory operations ......................................................................................... 8
3.3.1.2 Communication interface ...................................................................................................... 10
3.3.1.3 Voltage and current sensors .................................................................................................. 10
3.3.2 IC Power Supply and High Voltage Startup Cell ......................................................................... 11
3.3.2.1 Direct AC input monitoring combined with VCC startup function ....................................... 11
3.3.2.2 X-cap discharge function via the integrated HV startup-cell ................................................ 12
3.3.3 Standby Mode with synchronous PFC-LLC burst operation ...................................................... 13
3.3.4 IC protection ................................................................................................................................ 13
3.3.4.1 Undervoltage lockout for VCC ............................................................................................... 13
3.3.4.2 Overvoltage protection for VCC ............................................................................................. 14
3.3.4.3 Over temperature protection ................................................................................................ 14
3.3.4.4 Auto Restart Mode .................................................................................................................. 14
3.3.5 AC detection ................................................................................................................................ 14
3.4 PFC Controller ................................................................................................................................... 14
3.4.1 PFC Softstart................................................................................................................................ 15
3.4.2 PFC Multi-mode operation .......................................................................................................... 15
3.4.3 PFC Protection ............................................................................................................................ 17
3.4.3.1 PFC Open Control Loop Protection (PFCOCLP) .................................................................... 17
3.4.3.2 PFC Inductor Over Current Protection (PFCOCP) ................................................................. 17
3.4.3.3 PFC Output Over Voltage Protection (PFCOVP) .................................................................... 17
3.4.3.4 PFC Output Redundant Over Voltage Protection (PFCROVP) .............................................. 17
3.4.3.5 PFC Output Under Voltage Protection (PFCUVP) .................................................................. 18
3.4.3.6 PFC Brownin Protection for AC Input Line (PFCBIP) ............................................................. 18
3.4.3.7 PFC Brownout Protection for AC Input Line (PFCBOP) ......................................................... 18
3.4.3.8 PFC Long Time Continuous Conduction Mode Protection (PFCCCMP) ............................... 18
3.5 Half-bridge LLC Controller ................................................................................................................ 19
3.5.1 LLC Softstart (Time Controlled Oscillator TCO) ......................................................................... 19
3.5.2 LLC Normal Operation (Voltage Controlled Oscillator VCO) ..................................................... 19
3.5.3 LLC Smooth Transition of Frequency Control from TCO to VCO ............................................... 21
3.5.4 LLC Half-bridge Protection ......................................................................................................... 21
3.5.4.1 LLC Open Control Loop Protection (LLCOCLP) ..................................................................... 21
3.5.4.2 LLC Over Load Protection (LLCOLP) ...................................................................................... 21
3.5.4.3 LLC Over Current Protection Level 1 (LLCOCP1) ................................................................... 21
3.5.4.4 LLC Over Current Protection Level 2 (LLCOCP2) ................................................................... 22
3.6 Operation Flow .................................................................................................................................. 22
3.6.1 IC Initialization ............................................................................................................................ 22
3.6.2 Operation Flow of the PFC Controller ........................................................................................ 23
3.6.3 Operation Flow of the Halfbridge LLC Controller ...................................................................... 24
3.7 Overview Protection Features .......................................................................................................... 25