Chip Features A programmable switching power supply chip combining analog and digital circuits. The chip has a built-in encrypted ID code to protect the customer's MCU development program. Built-in Buck step-down module, Boost step-up module, and power PMOS and NMOS drivers, driving current ±100mA. Analog circuits constitute the voltage loop, current loop, and cycle-by-cycle current limiting functions of the switching power supply. After the digital circuit configures the reference value of the analog loop, it automatically completes the functions of voltage regulation, constant current, current limiting, and short-circuit protection. Configurable synchronous current recirculation function. Configurable MOS tube dead-time generator, adjustable dead-time range: 30nS～350nS. 2.5V reference voltage source, accuracy ±1%. Configurable PWM clock oscillator, configurable range: 42KHz～500KHz. 2 configurable cycle-by-cycle current limiting comparators, effectively protecting the peak current of the power PMOS and NMOS, configurable range: 50mV～250mV. 1 configurable voltage loop op-amp reference, configurable range: 4.2V～5.5V. 2 configurable constant current loop op-amp references, configurable range: 1mV～122mV. 1 configurable current loop amplifier and slope compensation circuit. Configurable short-circuit protection controller, configurable short-circuit detection delay time and release method, delay time configurable range: 3uS～213uS. The external MCU configures the internal registers of the chip through the I²C bus. 8-channel input, 10-bit ADC analog-to-digital converter, 1 selectable configurable gain input preamplifier. Built-in chip temperature sensor, supports external MCU reading of the internal chip temperature. 5 configurable LED constant current drivers, no need for external current-limiting resistors, constant current configurable range: 0.5mA～6mA. 1 high-power LED driver, with an external current-limiting resistor, maximum current 100mA. Wide operating voltage range: +2.5V～+5.5V. Package: SSOP24

Chip Description

The EG1503 chip integrates a high-precision 2.5V reference voltage source, a configurable 42KHz～500KHz wide-frequency oscillator, a configurable multi-channel error amplifier, a Buck/Boost step-up/step-down switching power supply control module, an 8-channel input 10-bit ADC, an I²C bus controller, a digital circuit control module, an LED constant current driver, and a power MOSFET driver, etc.

The EG1503 is a programmable switching power supply chip combining analog and digital functions. It features low power consumption and high flexibility. With an inexpensive 8-pin microcontroller (ADC function not required), it can implement a high-end power management system, making it ideal for mobile devices and battery management applications.