NCP1034DR2G ON Semiconductor

DATA SHEET www.onsemi.com PWM Buck Controller, MARKING DIAGRAM Synchronous, 100V SOIC16 NCP1034DG D SUFFIX NCP1034 AWLYWW CASE 751B Description The NCP1034 is a high voltage PWM controller designed for high A = Assembly Location WL = Wafer Lot performance synchronous Buck DC/DC applications with input Y = Year voltages up to 100 V. The NCP1034 drives a pair of external WW = Work Week N MOSFETs. The switching frequency is programmable from G = PbFree Package 25 kHz up to 500 kHz allowing the flexibility to tune for efficiency and size. A synchronization feature allows the switching frequency to be set by an external source or output a synchronization signal to PIN CONNECTIONS multiple NCP1034 controllers. The output voltage can be precisely regulated using the internally trimmed 1.25 V reference voltage for OCset 1 UVLO 16 low voltage applications. Protection features include user FB RT 2 15 programmable undervoltage lockout and hiccup current limit. Comp 14 GND 3 Features SS/SD 13 OCIN 4 High Voltage Operating up to 100 V SYNC 5 12 VCC Programmable Switching Frequency up to 500 kHz PGND 6 11 VS 2 A Output Drive Capability LDRV HDRV 7 10 Precision Reference Voltage (1.25 V) DRVCC 8 9 VB Programmable SoftStart with Prebiased Load Capability (Top View) Programmable Overcurrent Protection Programmable Undervoltage Protection ORDERING INFORMATION Hiccup Current Limit Using MOSFET R Sensing DS(on) See detailed ordering and shipping information in the package External Frequency Synchronization dimensions section on page 24 of this data sheet. 16 Pin SOIC Package This is a PbFree Device Applications 48 V NonIsolated DCDC Converter Embedded Telecom Systems Networking and Computing Voltage Regulator Distributed Point of Load Power Architectures General High Voltage DCDC Converters Semiconductor Components Industries, LLC, 2015 1 Publication Order Number: November, 2021 Rev. 15 NCP1034/DNCP1034 V : 48 V IN V : 12 V D1 CC C1A C1B R4 2u2 1N4148 2u2 110k C2 C3 C4 89 GND 100n 100n 100n DRVVCC VB 12 10 Q1 VCC HDRV NTD3055 V R10 OUT 5 11 L1 5 V 5 A, 200 kHz SYNC VS R8 10k 15 13 RT OCIN 13 GND C9 C9B C9C 10k 4 7 SS/SD LDRV R9 Q2 47 47 47 1k2 NTD24N06 R1 16 6 UVLO PGND 16k9 1 2 C8 OCSET FB 14 3 1n8 COMP GND C5 C6 R5 R6 R7 IC1 3k9 20k 11k NCP1034 220n 12n R3 R2 4k7 5k6 (For applications operating C7 at cold ambient tempera- 330p GND GND GND GND GND GND tures refer to the softstart section on Page 15) Figure 1. Typical Application Circuit www.onsemi.com 2