High-Efficiency Charger for Li-Ion ZSPM4521 Batteries with Photovoltaic Sources Datasheet Features Brief Description Temperature-independent photovoltaic maximum The ZSPM4521 is a DC/DC synchronous switching power tracking (MPPT) regulator lithium-ion (Li-Ion) battery charger with fully inte- grated power switches, internal compensation, and VBAT reverse-current blocking full fault protection. It uses a temperature-indepen- Programmable temperature-compensated dent photovoltaic maximum power point tracking termination voltage: 3.94V to 4.18V 1% (MPPT) function to optimize power output from the User programmable maximum charge current: source during Full-Charge Constant-Current (CC) 50mA to 1500mA Mode. Its switching frequency of 1MHz enables the Supervisor for V reported at the NFLT pin BAT use of small filter components, resulting in smaller Input supply under-voltage lockout board space and reduced bill-of material costs. Full protection for VBAT over-current, over- During Full-Charge Constant-Current Mode, the duty temperature, VBAT over-voltage, and charging cycle is controlled by the MPPT regulator. Once the timeout batterys termination voltage is reached, the regula- Charge status indication tor operates in Constant Voltage Mode. In this mode, 2 I C program interface with EEPROM registers 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 Related IDT Smart Power Products 10A (typical) quiescent current (Disabled Mode). ZSPM4523 DC/DC Synchronous Switching The ZSPM4521 includes supervisory reporting Super Capacitor Charger With MPPT Regulator through the NFLT (inverted fault) open-drain output ZSPM4551 High-Efficiency Li-Ion Battery Charger to interface other components in the system. Device ZSPM4121 Ultra-low Power Under-Voltage Switch programming is achieved by an IC* interface ZSPM4141 Ultra-Low-Power Linear Regulator through the SCL and SDA pins. Physical Characteristics Benefits Wide input voltage range: 4.0V to 7.2V Up to 1.5A of continuous output current in Full- Junction operating temperature: -40C to 125C Charge Constant Current (CC) Mode Package: 16-pin PQFN (4mm x 4mm) High efficiency up to 92% with typical loads Available Support ZSPM4521 Application Circuit Evaluation Kit Documentation ZSPM4521 Photovoltaic Cells VIN VTH REF R REF C IN VTHERM GND C R VDD L SENSE OUT Battery VDD SW C OUT R THM SCL VSENSE VDD RPULLUP (optional) SDA VBAT VDD R PULLUP (optional) EN NFLT PGND 2 * I C is a trademark of NXP. 2016 Integrated Device Technology, Inc. 1 January 27, 2016 High-Efficiency Charger for Li-Ion ZSPM4521 Batteries with Photovoltaic Sources Datasheet Photovoltaic ZSPM4521 Block Diagram Cells NFLT EN VIN C IN VIN VIN SCL ZSPM4521 IC* Interface SDA MONITOR & ~5V 450mA Over- CONTROL Voltage VBAT Protection VTH REF Oscillator BATT Thermal R Control REF Ramp Generator BATT Current VBAT VTHERM Control VIN S Vref Gate Backgate Blocking Drive SW Gate Drive L R Typical Applications OUT SENSE BATTERY Control COUT Portable solar chargers R THM Comparator Gate Error Amp Off-grid systems Drive PGND Compensation Wireless sensor VIN Network networks MPP & Current VDD Regulator Control VSENSE HVAC controls VBAT VDD GND C VDD 2 *I C is a trademark of NXP. Ordering Information Ordering Code Description Package ZSPM4521AA1W ZSPM4521 High Efficiency Li-Ion Battery Charger for 16-pin PQFN / 7 Reel (1000 parts) Photovoltaic Sources ZSPM4521AA1R ZSPM4521 High Efficiency Li-Ion Battery Charger for 16-pin PQFN / 13 Reel (3300 parts) Photovoltaic Sources ZSPM4521KIT ZSPM4521 Evaluation Kit Kit Corporate Headquarters Sales Tech Support 6024 Silver Creek Valley Road 1-800-345-7015 or 408-284-8200 www.IDT.com/go/support San Jose, CA 95138 Fax: 408-284-2775 www.IDT.com www.IDT.com/go/sales DISCLAIMER Integrated Device Technology, Inc. (IDT) reserves the right to modify the products and/or specifications described herein at any time, without notice, at IDT s sole discretion. Performance specifications and operating parameters of the described products are determined in an independent state and are not guaranteed to perform the same way when installed in customer products. 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Integrated Device Technology, IDT and the IDT logo are trademarks or registered trademarks of IDT and its subsidiaries in the United States and other countries. Other trademarks used herein are the property of IDT or their respective third party owners. For datasheet type definitions and a glossary of common terms, visit www.idt.com/go/glossary. All contents of this document are copyright of Integrated Device Technology, Inc. All rights reserved. 2016 Integrated Device Technology, Inc. 2 January 27, 2016