Chip Features Pure digital control loop, 3p3z optimization algorithm, fast dynamic response Minimal external hardware circuitry Symmetrical half-bridge PWM output, operating frequency 50kHz Integrated two serial communication modules for data transmission and reception Integrated two low-side MOSFET drivers, drive capability ±2A Integrated one high-speed comparator for overload and short-circuit protection Integrated one operational amplifier for current detection Charging management and protection functions: Multi-stage charging strategy; Output voltage and current soft start; LED indicator; Battery detection and reverse connection protection; input DC bus overvoltage and undervoltage protection; Fan and relay control; overtemperature protection and temperature compensation; Output overload and short-circuit protection;

Chip Description

The EG1155 is a mixed analog-digital chip specifically designed for multi-functional, high-power charging applications. It comes in an LQFP64 package and integrates a pure digital 3p3z algorithm, pure digital charging management, a serial communication module, a digital PWM module, a high-current MOS driver, a comparator, and an operational amplifier.

The EG1155 internally uses an optimized pure digital 3p3z constant-voltage constant-current dual-loop algorithm, completing calculations within a single PWM cycle. Compared to traditional PID algorithms, this significantly improves the system's dynamic response speed, reducing voltage and current stress on power components and enhancing product reliability.

The EG1155 integrates a pure digital charging management system, including multi-stage charging strategies, voltage and current soft start, LED indication, battery detection and activation, reverse polarity detection, over-temperature protection, and temperature compensation. It meets industry standards for various lead-acid and lithium-ion battery chargers.

The EG1155 integrates two serial communication modules, which can be used for communication with a host computer and an external display. Users only need to use the dedicated host software "EG1155 Debugging Assistant" to achieve quick and convenient parameter configuration, program upgrades, and batch production voltage and current calibration.

The EG1155 integrates two low-side MOS tube drivers with a drive capability of ±2A, used to drive symmetrical half-bridge MOS tubes to achieve power conversion. It integrates a comparator for MOS tube peak current detection, enabling output overload and short-circuit protection. It also integrates an operational amplifier for output current signal detection and amplification, enabling charging current control.