USB-Compliant Single-Cell Li-Ion Switching Charger with USB-OTG Boost Regulator FAN54015 www.onsemi.com Description The FAN54015 combines a highly integrated switchmode charger, to minimize singlecell Lithiumion (Liion) charging time from a USB power source, and a boost regulator to power a USB peripheral from the battery. The charging parameters and operating modes are programmable 2 through an I C Interface that operates up to 3.4 Mbps. The charger and WLCSP20 1.96x1.87x0.586 CASE 567SL boost regulator circuits switch at 3 MHz to minimize the size of external passive components. The FAN54015 provides battery charging in three phases: MARKING DIAGRAM conditioning, constant current and constant voltage. To ensure USB compliance and minimize charging time, the input 2 current limit can be changed through the I C by the host processor. A9&K &.&2&Z Charge termination is determined by a programmable minimum current level. A safety timer with reset control provides a safety 2 backup for the I C host. Charge status is reported to the host through 2 the I C port. A9 = Specific Device Code &K = 2Digits Lot Run Traceability Code The integrated circuit (IC) automatically restarts the charge cycle &. = Pin One Dot when the battery falls below an internal threshold. If the input source is &2 = 2Digit Date Code Format removed, the IC enters a highimpedance mode, preventing leakage &Z = Assembly Plant Code from the battery to the input. Charge current is reduced when the die temperature reaches 120C, protecting the device and PCB from ORDERING INFORMATION damage. See detailed ordering and shipping information on page 31 of The FAN54015 can operate as a boost regulator on command from this data sheet. the system. The boost regulator includes a softstart that limits inrush current from the battery and uses the same external components used Features (continued) for charging the battery. 3 MHz Synchronous Buck PWM Controller Features with Wide Duty Cycle Range Fully Integrated, HighEfficiency Charger for SingleCell LiIon Small Footprint 1 mH External Inductor and LiPolymer Battery Packs Safety Timer with Reset Control Faster Charging than Linear 1.8 V Regulated Output from VBUS for Charge Voltage Accuracy: +0.5% at 25C Auxiliary Circuits +1% from 0 to 125C Dynamic Input Voltage Control +5% Input Current Regulation Accuracy Low Reverse Leakage to Prevent Battery +5% Charge Current Regulation Accuracy Drain to VBUS 20 V Absolute Maximum Input Voltage 5 V, 500 mA Boost Mode for USB OTG for 3.0 V to 4.5 V Battery Input 6 V Maximum Input Operating Voltage Available in a 1.96 x 1.87 mm, 20bump, 1.45 A Maximum Charge Rate 2 0.4 mm Pitch WLCSP Package Programmable through HighSpeed I C Interface (3.4 Mb/s) with These are PbFree Devices Fast Mode Plus Compatibility Input Current Applications FastCharge / Termination Current Cell Phones, Smart Phones, PDAs Charger Voltage Tablet, Portable Media Players Termination Enable Gaming Device, Digital Cameras Semiconductor Components Industries, LLC, 2012 1 Publication Order Number: November, 2019 Rev. 2 FAN54015DFAN54015 L1 SW VBUS 1 H C BUS C OUT 1 F 0.1 F PGND PMID C MID CSIN 4.7 F R SDA SENSE FAN54015 68 m SCL VBAT Battery DISABLE C + BAT 10 F VREG OTG/USB SYSTEM C REG LOAD STAT 1 F Figure 1. Typical Application Table 1. FEATURE SUMMARY Automatic Special Safety Battery Absent Charge Charger (Note 1) Limits Behavior Part Number Slave Address E2 Pin VREG (E3 Pin) FAN54015UCX 1101010 Yes Yes Yes ON DISABLE 1.8 V 1. A special charger is a currentlimited charger that is not a USB compliant source. VREG 1.8 V / PMID REG C REG PMID PMID 1 F Q1 C Q3 MID 4.7 F Q1A VBUS CHARGE Q1B C PUMP BUS L1 1 F SW Q2 PWM 1 H I IN VBUS MODULATOR CONTROL C R SENSE OUT OVP 0.1 F PGND + VCC Battery CSIN DAC VREF VBAT C BAT SDA PMID SYSTEM 2 I C LOAD SCL STAT 30 mA INTERFACE OSC DISABLE LOGIC PMID Q1A Q1B OTG/USB AND Greater than V ON OFF BAT CONTROL Less than V OFF ON BAT Figure 2. IC and System Block Diagram www.onsemi.com 2