FRDM-BC3770-EVM

NXP Semiconductors Document Number: MC32BC3770 Rev. 1.0, 7/2016 Advance Information 2.0 A switch-mode charger with intelligent power-path for 1-cell BC3770 li-ion battery The BC3770 is a fully programmable switching charger with dual-path output for BATTERY CHARGER single-cell Li-Ion and Li-Polymer battery. This dual-path output allows mobile applications with fully discharged battery or dead battery to boot up the system. High-efficiency and switch-mode operation of the BC3770 reduce heat dissipation and allow for higher current capability for a given package size. In addition, the BC3770 features single input with a 20 V withstanding input and charges the battery with the current up to 2.0 A. The charging parameters and 2 operating modes are fully programmable over an I C Interface that operates up to 400 kHz. The BC3770 is a highly integrated synchronous switch-mode charger, featuring integrated OVP and Power FETs. The charger and boost regulator circuits CS SUFFIX switch at 1.5 MHz to minimize the size of external passive components. The 98ASA00848D BC3770 is able to operate as a boost regulator for USB-OTG function via either 25 WLCSP 2 I C command or an external pin from the host/processor. The BC3770 is available in a 25-bump, 2.27 mm x 2.17 mm, WLCSP package. Applications Features Internet of things (IoT) Dual-path output to power-up system in dead battery Handheld consumer devices Single input for USB/TA Wearable application High-efficiency synchronous switching regulator mPOS terminals 20 V maximum withstanding input voltage Medical portable equipment Minimize the charging time with remote sense Consumer tablets Up to 2.0 A load current for system or battery 2 Programmable charge parameters via I C compatible interface 2 400 kHz full-speed I C interface 1.5 MHz switching frequency Charge reduction mode for maximizing charging efficiency BC3770 USB/TA PMID VBUS VBUS D- PGND Charge D+ Detector ID GND BOOT VL GND System LX Load System I/O VIO INT INTB VSYS SDA SDA CHGOUT SCL SCL MCU BATREG GPIO CHGENB + Optional 1-Cell VF GPIO SHDNB NOBAT Li-Ion Battery - ADC BATSNSN connected on the PCB Figure 1. BC3770 simplified application diagram * This document contains certain information on a new product. Specifications and information herein are subject to change without notice. 2016 NXP B.V.1 Orderable parts Table 1. Orderable part variations Part number Temperature (T ) Package A MC32BC3770CSR2 -40 C to 85 C 25 WLCSP, 2.27 mm x 2.17 mm, 0.4 pitch BC3770 NXP Semiconductors 2