ZSPM4521 High-Efficiency Charger for Li-Ion Batteries with Photovoltaic Sources Features Brief Description The ZSPM4521 is a DC/DC synchronous switching lithium-ion (Li-Ion) battery charger with fully integrated power switches, internal compensation, and full fault protection. It uses a temperature-independent photovoltaic maximum power point tracking (MPPT) function to optimize power output from the source during Full-Charge Constant-Current (CC) Mode. Its switching frequency of 1MHz enables the use of small filter components, resulting in smaller board space and reduced bill-of material costs. During Full-Charge Constant-Current Mode, the duty cycle is controlled by the MPPT regulator. Once the battery’s termination voltage is reached, the regulator operates in Constant Voltage Mode. In this mode, the ZSPM4521 modulates the charging current until the battery reaches full charge. When the regulator is disabled (the EN pin is low), the device draws 10µA (typical) quiescent current (Disabled Mode). Temperature-independent photovoltaic maximum power tracking (MPPT) regulator VBAT reverse-current blocking Programmable temperature-compensated termination voltage: 3.94V to 4.18V ± 1% User programmable maximum charge current: 50mA to 1500mA Supervisor for VBAT reported at the NFLT pin Input supply under-voltage lockout Full protection for VBAT over-current, overtemperature, VBAT over-voltage, and charging timeout Charge status indication 2 I C™ program interface with EEPROM registers Related ZMDI Smart Power Products The ZSPM4521 includes supervisory reporting through the NFLT (inverted fault) open-drain output to interface other components in the system. Device programming is achieved by an I²C™* interface through the SCL and SDA pins. ZSPM4523 DC/DC Synchronous Switching Super Capacitor Charger With MPPT Regulator ZSPM4551 High-Efficiency Li-Ion Battery Charger ZSPM4121 Ultra-low Power Under-Voltage Switch ZSPM4141 Ultra-Low-Power Linear Regulator Benefits Physical Characteristics Up to 1.5A of continuous output current in FullCharge Constant Current (CC) Mode High efficiency – up to 92% with typical loads Available Support Wide input voltage range: 4.0V to 7.2V Junction operating temperature: -40°C to 125°C Package: 16-pin PQFN (4mm x 4mm) ZSPM4521 Application Circuit Evaluation Kit Documentation ZSPM4521 Photovoltaic Cells VIN VTH_REF RREF CIN VTHERM GND CVDD RSENSE LOUT VDD Battery SW COUT VDD RPULLUP (optional) SCL VSENSE SDA VBAT RTHM VDD EN NFLT RPULLUP (optional) PGND * I2C™ is a trademark of NXP. For more information, contact ZMDI via [email protected] © 2014 Zentrum Mikroelektronik Dresden AG — Rev. 1.01— October 3, 2014. All rights reserved. The material contained herein may not be reproduced, adapted, merged, translated, stored, or used without the prior written consent of the copyright owner. The information furnished in this publication is subject to changes without notice. ZSPM4521 High-Efficiency Charger for Li-Ion Batteries with Photovoltaic Sources ZSPM4521 Block Diagram EN NFLT Photovoltaic Cells VIN VIN CIN VIN ZSPM4521 SCL I²C™* Interface MONITOR & CONTROL OverVoltage Protection Oscillator SDA ~5V @ 450mA VBAT VTH_REF BATT Thermal Control Ramp Generator BATT Current Control RREF VTHERM VBAT VIN Vref Gate Drive Typical Applications Backgate Blocking Gate Drive Control Portable solar chargers Off-grid systems Comparator Wireless sensor networks HVAC controls LOUT RSENSE BATTERY COUT Compensation Network RTHM Gate Drive Error Amp SW PGND VIN VDD Regulator MPP & Current Control VSENSE VBAT VDD GND CVDD *I2C™ is a trademark of NXP. Ordering Information Ordering Code Description Package ZSPM4521AA1W ZSPM4521 High Efficiency Li-Ion Battery Charger for Photovoltaic Sources 16-pin PQFN / 7” Reel (1000 parts) ZSPM4521AA1R ZSPM4521 High Efficiency Li-Ion Battery Charger for Photovoltaic Sources 16-pin PQFN / 13” Reel (3300 parts) ZSPM4521KIT ZSPM4521 Evaluation Kit Kit Sales and Further Information www.zmdi.com [email protected] Zentrum Mikroelektronik Dresden AG Global Headquarters Grenzstrasse 28 01109 Dresden, Germany ZMD America, Inc. 1525 McCarthy Blvd., #212 Milpitas, CA 95035-7453 USA Central Office: Phone +49.351.8822.306 Fax +49.351.8822.337 USA Phone 1.855.275.9634 Phone +1.408.883.6310 Fax +1.408.883.6358 European Technical Support Phone +49.351.8822.7.772 Fax +49.351.8822.87.772 DISCLAIMER: This information applies to a product under development. Its characteristics and specifications are subject to change without notice. Zentrum Mikroelektronik Dresden AG (ZMD AG) assumes no obligation regarding future manufacture unless otherwise agreed to in writing. The information furnished hereby is believed to be true and accurate. However, under no circumstances shall ZMD AG be liable to any customer, licensee, or any other third party for any special, indirect, incidental, or consequential damages of any kind or nature whatsoever arising out of or in any way related to the furnishing, performance, or use of this technical data. ZMD AG hereby expressly disclaims any liability of ZMD AG to any customer, licensee or any other third party, and any such customer, licensee and any other third party hereby waives any liability of ZMD AG for any damages in connection with or arising out of the furnishing, performance or use of this technical data, whether based on contract, warranty, tort (including negligence), strict liability, or otherwise. European Sales (Stuttgart) Phone +49.711.674517.55 Fax +49.711.674517.87955 Zentrum Mikroelektronik Dresden AG, Japan Office 2nd Floor, Shinbashi Tokyu Bldg. 4-21-3, Shinbashi, Minato-ku Tokyo, 105-0004 Japan ZMD FAR EAST, Ltd. 3F, No. 51, Sec. 2, Keelung Road 11052 Taipei Taiwan Phone +81.3.6895.7410 Fax +81.3.6895.7301 Phone +886.2.2377.8189 Fax +886.2.2377.8199 Zentrum Mikroelektronik Dresden AG, Korea Office U-space 1 Building 11th Floor, Unit JA-1102 670 Sampyeong-dong Bundang-gu, Seongnam-si Gyeonggi-do, 463-400 Korea Phone +82.31.950.7679 Fax +82.504.841.3026 © 2014 Zentrum Mikroelektronik Dresden AG — Rev. 1.01— October 3, 2014 All rights reserved. The material contained herein may not be reproduced, adapted, merged, translated, stored, or used without the prior written consent of the copyright owner.