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ZSPM4521 Datasheet(PDF) 1 Page - Integrated Device Technology |
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ZSPM4521 Datasheet(HTML) 1 Page - Integrated Device Technology |
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1 / 30 page  High-Efficiency Charger for Li-Ion Batteries with Photovoltaic Sources ZSPM4521 Datasheet © 2016 Integrated Device Technology, Inc. 1 January 27, 2016 COUT LOUT RSENSE RREF Photovoltaic Cells Battery RTHM RPULLUP (optional) VDD RPULLUP (optional) VDD CIN CVDD GND EN VTHERM SW NFLT VBAT SCL PGND VIN SDA VTH_REF VSENSE VDD ZSPM4521 Brief Description The ZSPM4521 is a DC/DC synchronous switching lithium-ion (Li-Ion) battery charger with fully inte- grated power switches, internal compensation, and full fault protection. It uses a temperature-indepen- dent 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 regula- tor 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). 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. Benefits • Up to 1.5A of continuous output current in Full- Charge Constant Current (CC) Mode • High efficiency – up to 92% with typical loads Available Support • Evaluation Kit • Documentation * I 2C™ is a trademark of NXP. Features • 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, over- temperature, VBAT over-voltage, and charging timeout • Charge status indication • I 2C™ program interface with EEPROM registers Related IDT Smart Power Products • 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 Physical Characteristics • 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 |
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