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SY3511 Sample Application
General Description

SY3511 is a single-chip IC specially designed for portable power sources, highly integrating charging module, LED battery display cell and synchronous boost output, minimizing the peripheral circuits and components. and providing the simplest, low-cost solution for power bank applications such as large-capacity single-cell or multi-cell connected lithium battery (lithium ion or lithium polymer).  SY3511 is available in a ESOP8 package.

Features

Linear charging, synchronous boost output, built-in charge & discharge power MOSs

1A default charging current

KEY-based boost output, automatic end-of-discharge when the load is fully charged

1A synchronous boost output current

Original temperature management technology for boost

Charging in trickle current / constant current / constant voltage mode with thermal regulation for realizing the maximum charge rate without overheat risk

C/10 charge termination and automatic recharging

Preset 4.2V charge voltage with ±1% accuracy

Over-current, short-circuit, over-voltage and over-temperature protections during the discharge output

4 LEDs display to indicate the battery fuel gauge, charge/discharge and abnormality

Double click to turn on/off torch

Typical Application Circuit Diagram
Applications

Mobile devices such as mobile phones, tablets, GPS, and electric tools