PSC5425 Datasheet | Prisemi

Description The PSC5425 bines a highly integrated switch-mode charger, to minimize single-cell Lithium-ion (Li-ion) 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 through an I2C interface that operates up to 400kbps. The charger circuits switch at 1.5MHz to minimize the size of external passive ponents. The PSC5425 provides battery charging in three phases: conditioning, constant current, and constant voltage. To ensure USB pliance and minimize charging time, the input current is limited to the value set through the I2C host. The integrated circuit (IC) automatically restarts the charge cycle when the battery falls below an internal threshold. If the input source is removed, the IC enters a high-impedance mode with leakage from the battery to the input prevented. Charge status is reported back to the host through the I2C port. The PSC5425 can operate as a boost regulator on mand from the system. The boost regulator includes a soft-start that limits inrush current from the battery. The PSC5425 is available in a 2.04 x 2.0mm, 20-bump, 0.4mm pitch WLCSP package. VAUX VBUS CBUS 1μF VBUS CMID 10μF PMID SW BOOT 10KΩ 10KΩ 10KΩ 10KΩ 10KΩ PSC5425 CSIN SCL SDA STAT VBAT VREF OTG DISABLE PGND HOST L1 Cboot 33n F 1μH RSNS CCSIN 0.1μF BATTERY CBAT 22μF CREF 4.7μF CCSOUT 0.1μF Figure 1: Typical Application Feature - Fully Integrated, High-Efficiency Charger for Single-Cell Li-lon and Li-Polymer Battery Packs - Faster Charging than Linear - Charge Voltage Accuracy: ±0.5% 25℃ - ±5% Charge Current Regulation Accuracy - 20V Absolute Maximum Input Voltage - 13.5V Maximum Input Operating Voltage - 2.5A Maximum Charge Rate Application - Cellular Phones, Smart Phones, PDAs - Tablet, Portable Media Players - Gaming Device, Digital...