Datasheet 2 Cell / 3 Cell Narrow VDC Charger with SMBus Interface BD99950MUV General Description Key Specifications The BD99950MUV is a high-efficiency, synchronous Input Voltage Range: 6.0V to 24.0V Narrow VDC system voltage regulator and battery Output Voltage Range: 3.072V to 16.384V charger controller. It has two charge pumps which Charge Voltage Accuracy: 0.5% separately drive N-channel MOSFETs for automatic Switching Frequency: 600kHz to 1.2MHz system power source selection. Charge voltage, charge Battery Standby Current: 17A (Typ) current, AC adapter current and minimum system Operating Temperature Range: -10C to +85C voltage can be programmed through SMBus. With a small inductor, PWM switching frequency can also be Structure programmed by SMBus up to 1.2MHz. Silicon Monolithic Integrated Circuit Features Package W(Typ) x D(Typ) x H(Max) N-channel MOSFETs available for Battery or VQFN20PV3535 3.50mm x 3.50mm x 1.00mm Adapter Selection via Internal Charge Pumps Fast DPM Transient Response under Turbo Mode(<100s) Linear Mode Trickle Charge via BGATE Charge Pump Low Operating Current BGATE Charge Pump at 17A(typical) MLCC Output Capacitor High Light Load Efficiency for Energy Star and ErP Lot6 Fast Load Current Transient Response under No Battery or Dead Battery conditions NMOS-NMOS Synchronous Step-Down Controller Programmable 600kHz-1.2MHz Switching Frequency Programmable Charge Voltage (16mV resolution), VQFN20PV3535 Charger Current (64mA resolution), Input Current (64mA resolution), Minimum System Voltage (64mV resolution) 0.5% Charge Voltage Accuracy 3% Charge Current Accuracy 3% Input Current Accuracy 0.5% Minimum System Voltage Accuracy 2% 20x Input Current Amplifier Output Accuracy Integrated Loop Compensation Battery Learn Function AC Adapter Operating Range: 6.0V to 24.0V Off-State Battery Discharge Current at 15A 20pin 3.5mm3.5mm QFN Package Applications Ultrabook, Notebook PC, Ultra-mobile PC, Tablet PC Product structure : Silicon monolithic integrated circuit This product has no designed protection against radioactive rays .w ww.rohm.com TSZ02201-0A1A0A700570-1-2 2019 ROHM Co., Ltd. All rights reserved. 1/34 TSZ22111 14 001 25.Jan.2019.Rev.005 BD99950MUV Typical Application Circuit ADAPTER + ACP ACN BOOT ACGATE VCC HDRV PHASE SYSTEM ACDET LDRV REGN BD99950MUV SRP SRN BATTRM HOST ACOK BGATE SCL SMBus SDA BATT BATTERY+ IOUT GND Figure 1. Typical Application Circuit Pin Configuration (TOP VIEW) 15 14 13 12 11 16 10 REGN BATT BOOT 17 9 SCL HDRV 18 BD99950MUV 8 SDA 19 7 PHASE IOUT 20 6 ACDET VCC 1 2 3 4 5 www.rohm.com TSZ02201-0J1J0A700570-1-2 2019 ROHM Co., Ltd. All rights reserved. 2/34 TSZ22111 15 001 25.Jan.2019.Rev.005 ACN LDRV ACP GND ACGATE SRP BATTRM SRN ACOK BGATE