Part Number: PC97551

Function: Embedded Controller for Notebook Systems

Package: LQFP and FBGA176 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. The PC97551 incorporates National’s CompactRISC CR16B core (a high-performance 16-bit RISC processor), internal ROM and RAM memories, system support functions and a Bus Interface Unit (BIU) that directly interfaces with both external memory (such as flash) and I/O devices. 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. The PC97551 interfaces with the host via an LPC interface that provides the host with access to the Keyboard and embedded controller interface channels and to the BIOS flash. Like other members of Winbond’s Advanced I/O family, the PC97551 is PC01 and ACPI compliant.

 

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

7. Software and hardware controlled clock throttling and extremely low current consumption in Idle mode

Block diagram:

Embedded Controller:

1. CompactRISC CR16B Processing Unit – a 16-bit embedded RISC processor core (the “core”)

2. Internal Memory

(1) Boot block for core code in 4 Kbytes of ROM

(2) 4 Kbytes of on-chip RAM with contents protection

(3) ROM and RAM both can hold code and data

PC97551 PDF Datasheet

Part Number: OZ9910

Function: Dual Forward PWM Controller

Package: SOP, DIP 16 Pin Type

Manufacturer: O2 Micro

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Description

The OZ9910 is a high-efficiency pulse-width modulation (PWM) controller designed for both DC/DC and DC/AC high voltage applications. A dual forward PWM controller refers to a specific type of controller circuit that is designed for controlling and regulating power in a forward converter topology

Devices such as magnetrons and traveling wave tubes (TWT) require a bias voltage up to several thousand Volts DC and Cold Cathode Fluorescent Lamp (CCFL) requires several hundred to thousand Volts AC to operate. The OZ9910, dual forward PWM controller, is optimized for such applications OZ9910 operates in a zero-voltage switch mode through the dual forward topology utilizing free-wheeling diodes. The IC operates in a constant frequency mode that minimizes electromagnetic interference (EMI). In addition, OZ9910 achieves a high power-conversion efficiency resulting in lower power dissipation and higher system reliability that are critical for radar transmitters and display systems

The dual forward PWM controller typically incorporates various control and regulation features, such as voltage feedback loops, current sensing, voltage/current mode control, soft-start functionality, and overcurrent/overvoltage protection. These features ensure stable and efficient operation of the forward converter circuits.

Features:

• Controller for high-voltage DC/DC and DC/AC converters

• High-efficiency, zero voltage switching dual forward controller

• Feed forward compensation

• Combined analog and/or PWM control modes for wide-range load regulation

• Supports wide input voltage range

• Constant operating frequency

• Soft start function

• Built-in open-load protection, over-voltage protection and over-current protection

• Built-in under-voltage lockout function

• Low stand-by power

• Toggle ENA pin to reset IC

OZ9910 PDF Datasheet