The US3004/5 series of Controller ICs are specifically designed to meet Intel specification for Pentium IIIä microprocessor applications as well as the next generation P6 family processors. The IC provides a single chip Controller IC for the Vcore , GTL+ and clock supplies required for the Pentium III applications.
■ Meets Latest VRM 8.4 Specification for PIII
■ Provides Single Chip Solution for Vcore, GTL+ and Clock Supply
■ On board DAC programs the output voltage from 1.3V to 3.5V. The US3004/5 remains on for VID code of (11111).
■ Dual linear regulator Controller on board for 1.5V GTL+ and 2.5V clock supplies
■ Loss less Short Circuit Protection
■ Synchronous operation allows maximum efficiency
■ Patented architecture allows fixed frequency operation as well as 100% duty cycle during dynamic load
■ Min part count, No external Compensation
■ Soft Start
■ High current totem pole driver for direct driving of the external POWER MOSFET
■ POWER Good function
■ Pentium III & next generation processor DC to DC converter application
■ Low cost Pentium with AGP
POWER Factor Controller IC for High POWER Factor and Active Harmonic Filtering
Features ● IC for sinusoidal line-current consumption ● POWER factor approaching 1 ● Controls boost converter as an active harmonics filter ● Direct drive of SIPMOS transistor ● Zero crossing detector for discontinuous operation mode with variable frequency ● 110/220 V AC operation without switchover ● Standby current consumption of 0.5 mA
General description The SSL4120 integrates a POWER Factor Corrector (PFC) Controller and a Controller for a Half-Bridge resonant Converter (HBC) in a multi-chip IC. It provides the drive function for the discrete MOSFET in an up-converter and for the two discrete POWER MOSFETs in a resonant half-bridge configuration.
Features and benefits General features ■ Integrated PFC and HBC Controllers ■ Universal mains supply operation from 85 V to 305 V (AC) ■ High level of integration resulting in a low external component count and a cost effective design ■ Enable input to enable only the PFC or both the PFC and HBC Controllers ■ On-chip high-voltage start-up source ■ Stand-alone operation or IC supplied from external DC source
PFC Controller features ■ Boundary mode operation with on-time control ■ Valley/zero-voltage switching for minimum switching losses ■ Frequency limiting to reduce switching losses ■ Accurate boost voltage regulation ■ Burst mode switching with soft-start and soft-stop
HBC Controller features ■ Integrated high-voltage level shifter ■ Adjustable minimum and maximum frequency ■ Maximum 500 kHz half-bridge switching frequency ■ Adaptive non-overlap time ■ Burst mode switching
Protection features ■ Safe restart mode for system fault conditions ■ General latched protection input for output overvoltage protection or external temperature protection ■ Protection timer for time-out and restart ■ Overtemperature protection ■ Soft (re)start for both Controllers ■ Undervoltage protection for mains (brownout), boost, IC supply and output voltage ■ Overcurrent regulation and protection for both Controllers ■ Accurate overvoltage protection for the boost voltage ■ Capacitive mode protection for the HBC Controller
Applications The IC is used in all LED lighting applications that require very efficient, low Total Harmonic Distortion (THD), high POWER Factor (PF) and a universal mains input voltage. The SSL4120 provides a cost-effective POWER supply solution between 25 W and 400 W.
INTRODUCTION STR-A6300 series is a hybrid IC with a built-in POWER MOSFET and a Controller IC, designed for fly-back converter type SMPS(Switching Mode POWER Supply) applications, packaged into DIP8, applicable for PRC operation only for small POWER SMPS. This IC realizes downsizing and standardizing of a POWER supply system that reduces external components count and simplifies circuit designs. (Note) PRC is abbreviation of “Pulse Ratio Control”(On-width control with fixed OFF-time).
FEATURES ● Small sized 8-pin DIP type full molded package, optimum IC for low-height SMPS ● Oscillator is incorporated in the monolithic control IC with adopting On-Chip-Trimming technology. ● Small temperature characteristics variation by adopting a comparator compensated for temperature in the control part ● Low start-up circuit current(50uA max) ● Built-in Active Low-Pass Filter for stabilizing the operation at light load ● Avalanche energy guaranteed MOSFET with high VDSS • The built-in POWER MOSFET simplifies the surge absorption circuit since the MOSFET guarantees the avalanche energy. • No VDSS de-rating is required. ● Built-in constant voltage drive circuit ● Various kinds of protection functions • Pulse-by-pulse Overcurrent Protection(OCP) • Overvoltage Protection with latch mode (OVP) • Thermal Shutdown with latch mode (TSD)
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.
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
DDR Memory Source Sink Vtt Application
Hard Disk Drive
Power supplies requiring multiple outputs
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
DESCRIPTION The APU3046 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 can be configured as 2-independent or 2-phase Controller. In 2-phase configuration, the APU3046 provides a programmable current sharing which is ideal when the output power exceeds any single input power budget.
FEATURES ■ Dual Synchronous Controller in 24-Pin Package with 1808 out-of-phase operation ■ LDO Controller with Independent Bias Supply ■ Can be configured as 2-Independent or 2-Phase PWM Controller ■ Programmable Current Sharing in 2-Phase Configuration ■ Flexible, Same or Separate Supply Operation ■ Operation from 4V to 25V Input ■ Programmable Switching Frequency up to 400KHz ■ Soft-Start controls all outputs ■ Precision Reference Voltage Available ■ 500mA Peak Output Drive Capability ■ Short Circuit Protection for all outputs ■ Power Good Output ■ Synchronizable with External Clock ■ RoHS Compliant
APPLICATIONS ■ Dual-Phase Power Supply ■ DDR Memory Source Sink Vtt Application ■ Graphic Card ■ Hard Disk Drive ■ Power supplies requiring multiple outputs
The R2A20111 is a POWER-factor correction (PFC) Controller IC. This IC adopts continuous conduction mode as PFC operation. Various functions such as constant POWER limit, overvoltage detection, overcurrent detection, soft start, feedback-loop disconnection detection, and holding function of PFC operation through momentary outage (PFC hold function) are incorporated in a single chip. These functions reduce external circuitry.
The constant POWER limit function allows to eliminate a significant amount of coil noise which is generated due to overcurrent detection operation in case of conventional overload. The PFC hold function enables quick recovery by continuing PFC operation after momentary outage. The hold time can be adjusted by an external capacitance. Overcurrent detection pin is separately provided. Latch mode shutdown function is incorporated. A soft-start control pin provides for the easy adjustment of soft-start operation, and can be used to prevent overshooting of the output voltage.
• Maximum ratings
⎯ POWER-supply voltage Vcc: 24 V
⎯ Operating junction temperature Tjopr: – 40 to 125°C
• Electrical characteristics
⎯ VREF output voltage VREF: 5.0 V ± 3%
⎯ UVLO operation start voltage VH: 10.5 ± 0.9 V
⎯ UVLO operation stop voltage VL: 9.0 ± 0.7 V
⎯ PFC output maximum ON duty Dmax-out: 95% (typ.)
⎯ Constant POWER limit function
⎯ Continuous conduction mode
⎯ Hold function of PFC operation on momentary outage (PFC hold function)
⎯ Overvoltage detection
⎯ Overcurrent detection
⎯ Soft start
⎯ Feedback loop disconnection detection
⎯ IC shutdown function
⎯ Package lineup: SOP-16 and DILP-16
• Flat panel display
• Desktop PC
• White goods