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DESCRIPTION

The APU3048 IC combines a Dual synchronous Buck Controller and a linear regulator Controller, providing a cost-effective, high performance and flexible solution for multi-output applications. The Dual synchronous Controller is configured as 2-independent PWM Controller.

APU3048 provides a separate adjustable output by driving a switch as a linear regulator.

FEATURES

Dual Synchronous Controller in 16-Pin Package with 1808 out-of-phase operation

LDO Controller with 40mA drive

Configured as 2-Independent PWM Controller

Flexible, Same or Separate Supply Operation

Operation from 4V to 25V Input

Internal 200KHz Oscillator

Soft-Start controls all outputs

Fixed Frequency Voltage Mode

500mA Peak Output Drive Capability

Programmable Outputs

RoHS Compliant

APPLICATIONS

DDR Memory Source Sink Vtt Application

Graphic Card

Hard Disk Drive

Power supplies requiring multiple outputs

General Description

The RT9228 is a 3-in-one power Controller optimized for high-performance microprocessor and computer applications. The IC integrates a synchronous buck PWM Controller, a linear regulator, and a linear Controller as well as monitoring and protection functions into a 24-pin SOP package. The PWM Controller regulates the microprocessor core voltage. The linear regulator provides power for the clock driver circuit and the linear Controller regulates power for the GTL bus.

Features

3-in-one Regulated Voltages for Microprocessor Core, Clock, and GTL

Compatible with HIP6018B

Power-good Output Voltage Monitor

Features

>85% efficiency

- Supports multi Channel System

- 1Ω ~ 8Ω drive capability

- Flat response 20Hz ~ 20Khz - Sets Bridge

- Full Range Amp (250W/4Ω )

- Sub Woofer Amp (850W/1Ω) Application

- Car audio - Home theater - DVD players

- Wireless speakers - Sub woofer system - PDP TV & HDTV - PA Amp

Reference site : PWM-dli4060b-ic.html" target="_blank">http://www.diyaudio.com/forums/car-audio/200557-crossfire-xp600d-need-PWM-dli4060b-ic.html

Introduction
This application note describes step-by-step design considerations for a power supply using the FAN480X Controller. The FAN480X combines a PFC Controller and a PWM Controller. The PFC Controller employs average current mode control for Continuous Conduction Mode (CCM) boost converter in the front end. The PWM Controller can be used in either current mode or voltage mode for the downstream converter. In voltage mode, feed-forward from the PFC output bus can be used to improve the line transient response of PWM stage. In either mode, the PWM stage uses conventional trailingedge duty cycle modulation, while the PFC uses leadingedge modulation. This proprietary leading/trailing-edge modulation technique can significantly reduce the ripple current of the PFC output capacitor.

DESCRIPTION
The US3033 IC combines a switching Controller and a linear regulator Controller all in a compact 8 pin surface mount package, providing a total solution for dual supply processor applications such as an Intel P55C ™, AMD K6™, as well as Cyrix 6X86L™ and the M2™ processors.
   
FEATURES
■ LDO Controller allows the use of a low cost
    pass transistor for the I/O supply
■ 8 pin SOIC combines switching and linear
    Controller
■ Internal Pre-regulator Eliminates Cross talk
    between Switching & Linear regulators
■ Automatic shut down of the linear regulator
    when connected to the Vcc2 Det pin
■ On board MOSFET driver
■ Fastest transient response of any Controller
    method. ( 0 to 100% Duty Cycle in 100 nS )
■ 1% internal voltage reference
■ Internal Under Voltage Lockout protects
    MOSFET during start-up
   
APPLICATIONS
■ Dual supply low voltage processor applications,
    such as: P55C™,CYRIX M2™, POWER PC™ and
    AMD K6™
■ Simple 5V to 3.3V switcher for Pentium with AGP
    or Pentium II™ applications
   

GENERAL DESCRIPTION
The ML4819 is a complete boost mode Power factor Controller (PFC) which also contains a PWM Controller. The PFC circuit is similar to the ML4812 while the PWM Controller can be used for current or voltage mode control for a second stage converter. Since the PWM and PFC circuits share the same oscillator, synchronization of the two stages is inherent. The outputs of the Controller IC provide high current (>1A peak) and high slew rate to quickly charge and discharge MOSFET gates. Special care has been taken in the design of the ML4819 to increase system noise immunity.

FEATURES
■ Two 1A peak current totem-pole output drivers
■ Precision buffered 5V reference (±1%)
■ Large oscillator amplitude for better noise immunity
■ Precision duty cycle limit for PWM section
■ Current input gain modulator improves noise immunity
■ Programmable Ramp Compensation circuit
■ Over-Voltage comparator helps prevent output “runaway”
■ Wide common mode range in current sense compensators for better noise immunity
■ Under-Voltage Lockout circuit with 6V hysteresis

DESCRIPTION
The US3036 IC provides an 8 pin low cost switching Controller with true short circuit protection all in a compact 8 pin surface mount package, providing a low cost switching solution for applications that require a simple switching regulator from the 5V input where there is no other supply available. One type of such application is generating 2.5V standby from the dual 5V(5V and 5V standby) for the next generation processors.
   
FEATURES
■ 8 pin SOIC Switching Controller with
    HICCUP Current Limiting Reduces Diode Power
    Dissipation to Less than 1% of Normal Operation
■ Soft Start Capacitor allows for smooth Output
    Voltage ramp up
■ On board MOSFET driver
■ Fastest transient response of any Controller
    method. ( 0 to 100% Duty Cycle in 100 nS )
■ 1% internal voltage reference
■ Internal Under Voltage Lockout protects
    MOSFET during start-up
   
APPLICATIONS
■ Single input Switching Regulators such as Simple
    5V to 2.5V switcher for RDRAM regulator
   

3-Phase Synchronous PWM Controller IC Provides an Integrated Solution for Intel VRM 9.0 Design Guidelines

The fundamental reason for the rapid change and growth in information technology power requirements is the increase in volume of data processed, stored, transmitted, and displayed. As a result, power requirements have grown very rapidly. To control the increase in power dissipation, operating voltages have been reduced. Power scales as the square of the voltage: cut the voltage in half, and the power dissipation is reduced to one fourth. As circuit output voltages approach the one-volt mark, operating currents are increasing exponentially. Today, feeding this much “ultraclean” current at these low voltages with tremendous transient response capability is the key technology driver of power management for IT.

GENERAL DESCRIPTION
The ML4819 is a complete boost mode Power factor Controller (PFC) which also contains a PWM Controller. The PFC circuit is similar to the ML4812 while the PWM Controller can be used for current or voltage mode control for a second stage converter. Since the PWM and PFC circuits share the same oscillator, synchronization of the two stages is inherent. The outputs of the Controller IC provide high current (>1A peak) and high slew rate to quickly charge and discharge MOSFET gates. Special care has been taken in the design of the ML4819 to increase system noise immunity.

FEATURES
■ Two 1A peak current totem-pole output drivers
■ Precision buffered 5V reference (±1%)
■ Large oscillator amplitude for better noise immunity
■ Precision duty cycle limit for PWM section
■ Current input gain modulator improves noise immunity
■ Programmable Ramp Compensation circuit
■ Over-Voltage comparator helps prevent output “runaway”
■ Wide common mode range in current sense compensators for better noise immunity
■ Under-Voltage Lockout circuit with 6V hysteresis

DESCRIPTION
The US3034 IC provides an 8 pin low cost switching Controller with true short circuit protection all in a compact 8 pin surface mount package, providing a low cost switching solution for dual supply processor applications that require switching regulator for the 3.3V supply such as the applications with AGP on board.
   
FEATURES
■ 8 pin SOIC Switching Controller with
    HICCUP Current Limiting Reduces Diode
    Power Dissipation to Less than 1% of Normal
    Operation
■ Soft Start Capacitor allows for smooth Output
    Voltage ramp up
■ On board MOSFET driver
■ Fastest transient response of any Controller
    method. ( 0 to 100% Duty Cycle in 100 nS )
■ 1% internal voltage reference
■ Internal Under Voltage Lockout protects
    MOSFET during start-up
   
APPLICATIONS
■ Dual supply low voltage processor applications,
    such as: P55Cä,CYRIX M2ä, POWER PCä and
    AMD K6ä
■ Simple 5V to 3.3V switcher for Pentium with AGP
    or Pentium IIä applications