ATmega328P PDF Datasheet – 8-bit AVR Microcontroller

This is one of the Microcontroller types. An 8-bit AVR microcontroller is a type of microcontroller from the AVR (Alf and Vegard’s RISC processor) family developed by Atmel (now a part of Microchip Technology). These microcontrollers are characterized by their 8-bit CPU architecture, making them suitable for a wide range of embedded system applications where moderate computational power and low power consumption are required.

The Part Number is ATmega328P.

The function of this semiconductor is 8-bit AVR Microcontroller.

Manufacturer: ATMEL, Microchip

Preview images :

ATmega328P pdf

Description

ATmega328P is a low-power CMOS 8-bit microcontroller based on the AVR® enhanced RISC architecture. By executing powerful instructions in a single clock cycle, the ATmega328/P achieves throughputs close to 1MIPS per MHz. This empowers system designer to optimize the device for power consumption versus processing speed.

This IC is a popular microcontroller chip that is part of the AVR microcontroller family produced by Atmel (now a part of Microchip Technology). This Microcontroller is widely used in various embedded systems and is known for its versatility and ease of use.

Block Diagram

ATmega328P pinout datasheet

Features

1. High Performance, Low Power Atmel®AVR® 8-Bit Microcontroller Family

2. Advanced RISC Architecture

– 131 Powerful Instructions

– Most Single Clock Cycle Execution

– 32 x 8 General Purpose Working Registers

– Fully Static Operation

– Up to 20 MIPS Throughput at 20MHz

– On-chip 2-cycle Multiplier

3. High Endurance Non-volatile Memory Segments

– 32KBytes of In-System Self-Programmable Flash program Memory

– 1KBytes EEPROM

– 2KBytes Internal SRAM

– Write/Erase Cycles: 10,000 Flash/100,000 EEPROM

– Data Retention: 20 years at 85°C/100 years at 25°

 

ATmega328P PDF Datasheet

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SD4841 PDF Datasheet – Current Mode PWM Controller

This post explains for the PWM Controller. A current mode PWM (Pulse-Width Modulation) controller is a type of electronic control circuit used in various applications, especially in power electronics and switch-mode power supplies (SMPS). This controller regulates the output voltage or current by adjusting the duty cycle of a PWM signal based on the feedback from the load current.

The Part Number is SD4841.

The function of this semiconductor is Current Mode PWM Controller.

The package is DIP 8 Pin Type

Manufacturer: Silan Microelectronics

Preview images :

1 page
SD4841 pdf controller

Description

SD4840, SD4841, SD4842, SD4843, SD4844 is a current mode PWM controller with low standby power and low start current for power switch. In standby mode, the circuit enters burst mode to reduce the standby power dissipation.

The switch frequency is 67KHz with ±2.5 KHz jitter frequency for low EMI. stress on transformer during power on is reduced by the builtin 15ms soft start circuit to avoid the saturation of transformer.

Block Diagram
SD4841 pinout datasheet

1. PWM Generation: The error signal is fed into a comparator that compares it with a sawtooth waveform (typically generated by an oscillator). The output of this comparator generates the PWM signal.

2. Duty Cycle Adjustment: The duty cycle of the PWM signal is adjusted to control the power delivered to the load. If the sensed current is below the setpoint, the duty cycle is increased, and if it’s above the setpoint, the duty cycle is decreased.

Features

1. Lower start-up current (Typ.6μA)

2. Frequency jitter for low EMI

3. Overcurrent protection

4. Overvoltage protection

5. Undervoltage lockout

6. Built-in temperature protection

7. Built-in high voltage MOSFET

8. Auto restart mode

9. Built-in soft start

10. Burst mode operation

 

Applications:

1. Switch power

 

Other data sheets are available within the file:

SD4840P67K65, SD4841P67K65, SD4842P67K65, SD4843P67K65, SD4844P67K65

SD4841 PDF Datasheet