Part Number: BIT3252A

Function: Low Cost PWM Controller

Package: SOP-8 Type

Manufacturer: Beyond Innovation Technology

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Description

The BIT3252A is a high frequency PWM controller which integrates the required functions for a boost converter in a small SOP-8 package. A low 0.2V feedback voltage makes the system with high efficiency and its over voltage protection function makes the system reliable. Built-in 55V/1.2A NMOS save the space of PCB and simplify the circuit design.

Features

1. Voltage Mode PWM Controller

2. Low 0.2V reference Voltage

3. 330KHz Operation

4. Over Voltage Protection

5. Internal Soft-Start

6. Built-in 55V NMOS

7. Internal UVLO (Under Voltage Lock Out)

8. Limited Output Duty Cycle

9. Low Shutdown current (0.1uA)

1. The PWM Controller:

The pulse width modulation control circuit includes a ramp wave generator, an error amplifier and a comparator. These devices provide the required functions for the PWM feedback control application. The inverting input of the error amplifier is pulled high to reduce its output CMP when VDD<3.6V. The maximum duty cycle of the PWM controller is limited to 93%

2. The Over Voltage Protection:

BIT3252A has an OVP pin that is used to detect the converter output voltage, when there is a voltage higher than 1.5V sensed in this pin, BIT3252A will latch off its output This latch off function can make system operation more reliable. The latched off status can be released by reducing the supply voltage to lower than 3.6V.

BIT3252A PDF Datasheet

An embedded controller, also known as an embedded microcontroller or embedded system controller, is a specialized type of microcontroller that is designed to perform specific tasks within a larger system. It is a compact and self-contained computing unit that integrates processing, memory, input/output interfaces, and often other components, all within a single chip or package.

Part Number: PC97551-VPC

Function: Embedded Controller

Package: 176-pin LQFP and FBGA Type

Manufacturer: Winbond Electronics

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Description

The Winbond PC97551 is an embedded controller (EC) for mainstream notebook applications. It includes a highly optimized set of functions, which provide a hardware/firmware partition that enables the implementation of flexible solutions; and its high-performance CPU core enables EC functionality to be extended via the firmware.

System support functions include: watchdog, PWM, timers, interrupt control, General-Purpose I/O (GPIO) with internal keyboard matrix scanning, PS/2 Interface, SMBus interface, analog-to-digital (ADC) and digital-to-analog (DAC) converters for battery charging circuitry, system monitoring
and analog controls.

[…]

 

Features

1. Host interface, based on Intel’s LPC Interface Specification Revision 1.1, August 2002

2. PC2001 Rev 1.0, and ACPI 3.0 compliant

3. 16-bit RISC core, with 2 Mbytes address space, running at up to 20 MHz

4. Shared BIOS flash memory (external)

5. 92 GPIO ports (including keyboard scanning) with a variety of wake-up events

6. JTAG-based debugger interface

Applications:

1. Embedded controllers are used in a wide range of applications

2. Including consumer electronics (smartphones, appliances),

3. Automotive systems (engine control, infotainment)

4. Industrial automation (factory machinery, robots), medical devices, aerospace systems, and more.

PC97551-VPC PDF Datasheet