DATA SHEET www.onsemi.com AC-DC Active Clamp MARKING DIAGRAM Flyback PWM IC 1 1568 NCP1568 XXX TSSOP16 ALYW The NCP1568 is a highly integrated acdc PWM controller DT SUFFIX designed to implement an active clamp flyback topology. NCP1568 CASE 948BW 16 employs a proprietary variable frequency algorithm to enable zero voltage switching (ZVS) of SuperJunction or GaN FETs across line, load, and output conditions. The ZVS feature increases power density 1568 = Specific Device Code of a power converter by increasing the operating frequency while XXX = Specific Variant achieving high efficiency. The Active Clamp Flyback (ACF) = (S02, G03, G04) A = Assembly Location operation simplifies EMI filter design to avoid interference with other L = Wafer Lot sensitive circuits in the system. The NCP1568 features a HV startup Y = Year circuit, a strong low side driver, and a 5 V logic level driver for the W = Work Week active clamp FET. The NCP1568 is suitable for a variety of = PbFree Package applications including acdc adapters, industrial, telecom, lighting, (Note: Microdot may be in either location) and other applications where power density is an important requirement. The NCP1568 also features multimode operation and transitions ORDERING INFORMATION from ACF mode to Discontinuous Conduction Mode (DCM) to meet See detailed ordering and shipping information in the package regulatory requirements from around the world. The NCP1568 further dimensions section on page 2 of this data sheet. implements skip in standby mode, resulting in excellent standby power. The combination of flexible control scheme and user programmable features allow the use of NCP1568 with SuperJunction MOSFETs (Si) and Gallium Nitride (GaN) FETs. Features Features (Continued) Topology and Control Scheme Oscillator Active Clamp Flyback Topology Aids in ZVS Programmable Frequency from Proprietary MultiMode Operation to Enhance Light Load 100 kHz to 1 MHz Efficiency Internal SoftStart Timer with 4 Proprietary Adaptive ZVS Allows High Frequency Operation Options while Reducing EMI Protection Inbuilt Adaptive DeadTime for Both Main and Active Clamp Dedicated FLT Pin Compatible with FETs a Thermistor Peak CurrentMode Control with Inbuilt Slope Compensation Adjustable Over Power Protection with Options (OPP) Flexible Control Scheme and Programmability Allow for Option for AutoRecovery and Latched Configuration with Either External Silicon or GaN FETs in Various Faults DCM and Light Load Operation Internal Thermal Shutdown Customer Programmable Optional Transition to DCM Applications Integrated Frequency Foldback with Minimum Frequency USB Power Delivery Clamp for Highest Performance in Standby Mode Minimum Frequency Clamp and Quiet Skip Eliminates Notebook Adapters Audible Noise High Density Chargers Standby Power < 30 mW Industrial Power Supplies Integrated HV and Startup Circuits 700 V Startup Circuit AC Line Brownout Detect Drivers 0.85 A/1.5 A Source/Sink for Low Side 65 mA/150 mA Active Clamp Driver Output Semiconductor Components Industries, LLC, 2018 1 Publication Order Number: August, 2021 Rev. 5 NCP1568/DNCP1568 ORDERING INFORMATION Fixed DeadTime LEB/DTMAX/ ACF FET ACF FET from LDRV OFF to T ZVSA Soft Start Time Soft Stop Time T ZVSB HDRV or ADRV ATH Pin Device (ns) (ns) (ms) (ms) ON (ns) Mapping Package Shipping NCP1568S02DBR2G 179/420/210 150 4 0 20 I = 1.92 E = 1 TSSOP16 2,500 / (PbFree) Tape & Reel NCP1568G03DBR2G 99/240/120 60 4 0.5 0 I = 1.92 E = 1 TSSOP16 2,500 / (PbFree) Tape & Reel NCP1568G04DBR2G 99/240/120 100 4 0.5 0 I = 1.92 E = 1 TSSOP16 2,500 / (PbFree) Tape & Reel For information on tape and reel specifications, including part orientation and tape sizes, please refer to our Tape and Reel Packaging Specifications Brochure, BRD8011/D. L O T1 VOUT L CIN EMI RLED R1 HV SW N D5 Filter NCP1568 C CLAMP U1 NC NC ES1JAF R CO1 CLAMP CO2 RBIAS NC NC V BST CC C1 C BST C HSD D8 NCP51530 Fault C ATH ATH Q2 NCP431 R R2 NTC1 ATH HO C FLT RT RTN RT ADRV HIN HB DTH VSS C DTH T1 R V DTH CC U2 C VCC NCP4306 Q1 FB LDRV U1 C RFB AUX S T1 CSF CS GND R S C CS R CS S Auxiliary C AUX P CSF P Auxiliary Figure 1. Typical Application for the NCP1568 Active Clamp Flyback www.onsemi.com 2