NCP81391, NCP81391A Advance Information Integrated Driver and MOSFET The NCP81391/A integrates a MOSFET driver, highside www.onsemi.com MOSFET and lowside MOSFET into a single package. The driver and MOSFETs have been optimized for highcurrent DCDC buckboost power conversion applications. The NCP81391/A MARKING integrated solution greatly reduces package parasitics and board space DIAGRAM compared to a discrete component solution. 81391 Features ALYW QFN31 5x5 Capable of Average Currents up to 25 A CASE 485FG Capable of Peak Currents up to 65 A 81391 = Specific Device Code Over 97% PeakEfficiency A = Assembly Location L = Wafer Lot Compatible with 3.3 V and 5 V PWM Inputs, with TriState Y = Year Zero Current Detection for Improving Light Load Efficiency W = Work Week Optional Thermal Shutdown Protection = PbFree Package NCP81391: With Thermal Shutdown (Note: Microdot may be in either location) NCP81391A: No Thermal Shutdown Internal Bootstrap Diode PINOUT DIAGRAM Undervoltage Lockout This is a PbFree Device Applications NC9 9 31 GLD31 ECigarettes Unmanned Aerial Vehicles BST 10 30 GLD30 GH 11 29 GLF29 32 34 PGND 5V 12V 5V 12V GLF FLAG VOUT VIN NC12 12 28 GLF28 4.5V 20V VIN13 13 27 VSWH27 33 VIN VCCD VCC VIN VIN VCC VCCD FLAG VIN14 14 26 VSWH26 DRVON from DRVON from GH GH controller controller EN BST BST EN VIN15 15 25 VSWH25 VIN16 16 24 VSWH24 PWM PHASE PHASE PWM PWM1 from PWM2 from controller controller VSW VSW ZCD EN ZCD EN GLD GLD ZCD EN1 ZCD EN2 from controller CGND PGND GLF GLF PGND CGND from controller (Top View) Figure 1. Application Diagram (BuckBoost) ORDERING INFORMATION This document contains information on a new product. Specifications and information Device Package Shipping herein are subject to change without notice. NCP81391MNTXG QFN31 2500 / Tape & (PbFree) Reel NCP81391AMNTXG For information on tape and reel specifications, including part orientation and tape sizes, please refer to our Tape and Reel Packaging Specification Brochure, BRD8011/D. Semiconductor Components Industries, LLC, 2017 1 Publication Order Number: August, 2017 Rev. P0 NCP81391/D VIN17 17 8 VCCD VIN18 18 7 VCC VIN19 19 6 ZCD EN 5 PWM PGND20 20 4 EN PGND21 21 3 CGND PGND22 22 2 PGND2 PGND23 23 1 PHASENCP81391, NCP81391A GH VCCD BST VIN VCC PHASE LEVEL 45k SHIFT UVLO 3.84V SHUTDOWN Clip Temp DEAD PWM Sense VSWH TIME CNTRL 3.84V For NCP81391/ No TSD for NCP81391A ZCD EN LOGIC LEVEL SHIFT VSWH 45k PGND EN For NCP81391/ No resistor for NCP81391A GLD GLF CGND Figure 2. Simplified Block Diagram Table 1. PIN LIST AND DESCRIPTIONS Pin No. Symbol Description 1 PHASE Bootstrap Capacitor Return 2 PGND2 Power Ground 3 CGND Signal Ground 4 EN Enable. There is a pulldown resistor to CGND for the NCP81391. No pulldown resistor for NCP81391A. 5 PWM PWM Control Input: PWM = High HS FET is on, LS FET is off PWM = Mid HS FET is off, LS FET is off PWM = Low, ZCD EN = High HS FET is off, LS FET is on PWM = Low, ZCD EN = Low HS FET is off, LS FET is off when zero current is detected 6 ZCD EN Zero Current Detect Control. When this pin is at logic low, lowside FET will turn off when zero inductor current is detected (after a minimum blanking/debounce time). There is an internal pullup resistor. 7 VCC Control Power Supply Input 8 VCCD Driver Power Supply Input 9 NC9 No Connect 10 BST Bootstrap Supply Voltage. Connect a MLCC capacitor of at least 0.1 F from this pin to PHASE. 11 GH HighSide MOSFET Gate Access. Leave floating. 12 NC12 No Connect 13 VIN13 Conversion Supply Power Input 14 VIN14 Conversion Supply Power Input 15 VIN15 Conversion Supply Power Input www.onsemi.com 2