Analog Devices

The ADP1053, based on a voltage mode PWM architecture, is a flexible, application dedicated digital controller designed for isolated and non-isolated dc-to-dc power supply applications. The ADP1053 enables highly efficient power supply design and facilitates the introduction of intelligent power management techniques to improve energy efficiency at a system level.The ADP1053 provides control, monitoring, and protection of up to three independent channel outputs. The eight flexible PWM outputs can be configured as three independent channels: two regulated channels with feedback control plus one additional unregulated channel with a fixed duty cycle. The frequency of these three channels can be programmed individually from 50 kHz to 625 kHz; all channels can be synchronized internally or to an external signal.All eight PWM outputs can also be assigned to enable a single-channel solution, which may be required in high power, high efficiency applications.Features include differential voltage sensing, fast current sensing, flexible start-up sequencing and tracking, and synchronization between devices to reduce low frequency system noise. Protection and monitoring features include overcurrent protection (OCP), undervoltage protection (UVP), overvoltage protection (OVP), and overtemperature protection (OTP).APPLICATIONSAC-to-DC power suppliesIsolated dc-to-dc power suppliesIntermediate rail power suppliesNon-isolated dc-to-dc power converter

The ADP1055 is a flexible, feature-rich digital secondary side controller that targets ac-to-dc and isolated dc-to-dc secondary side applications. The ADP1055 is optimized for minimal component count, maximum flexibility, and minimum design time. Features include differential remote voltage sense, primary and secondary side current sense, pulse-width modulation (PWM) generation, frequency synchronization, redundant OVP, and current sharing. The control loop digital filter and compensation terms are integrated and can be programmed over the PMBus™interface. Programmable protection features include overcurrent (OCP), overvoltage (OVP) limiting, undervoltage lockout (UVLO), and external overtemperature (OTP).The built-in EEPROM provides extensive programming of the integrated loop filter, PWM signal timing, inrush current, and soft start timing and sequencing. Reliability is improved through a built-in checksum and programmable protection circuits.A comprehensive GUI is provided for easy design of loop filter characteristics and programming of the safety features. The industry-standard PMBus provides access to the many monitoring and system test functions. The ADP1055 is available in a 32-lead LFCSP and operates from a single 3.3 V supply.APPLICATIONSIsolated dc-to-dc power supplies and modulesRedundant power supply systems

The ADP1071-1/ADP1071-2 are pulse-width modulation (PWM) current mode fixed frequency synchronous flyback controllers designed for isolated dc-to-dc power supplies. Analog Devices proprietaryiCouplers®are integrated in the ADP1071-1/ADP1071-2 to eliminate the bulky signal trans-formers and optocouplers that transmit signals over the isolation boundary. Integrating theiCouplers reduces system design complexity, cost, and component count and improves overall system reliability. With the integrated isolators and metal-oxide semiconductor field effect transistor (MOSFET) drivers on both the primary and the secondary side, the ADP1071-1/ADP1071-2 offer a compact system level design and yield a higher efficiency than a diode rectified flyback converter at heavy loads.Output regulation is achieved by sensing the output voltage on the secondary side, where the feedback and the PWM signals are transmitted between the primary and secondary sides through theiCouplers.The ADP1071-1/ADP1071-2 are offered in a 16-lead SOIC_W package with an isolation voltage rating of 5 kV rms. The ADP1071-2 is designed for isolated dc-to-dc applications typically with an input voltage less than 36 V, and the ADP1071-1 targets high input voltage applications, in which the dc input voltage can exceed 60 V.The ADP1071-1/ADP1071-2 offer features such as input current protection, output overvoltage protection (OVP), undervoltage lockout (UVLO), precision enable with adjustable hysteresis, overtemperature protection (OTP), and power saving light load mode (LLM).ApplicationsIsolated dc-to-dc or ac-to-dc power conversionTelecom, industrialSmall cellPoE powered deviceEnterprise switches and routers

The ADP1071-1/ADP1071-2 are pulse-width modulation (PWM) current mode fixed frequency synchronous flyback controllers designed for isolated dc-to-dc power supplies. Analog Devices proprietaryiCouplers®are integrated in the ADP1071-1/ADP1071-2 to eliminate the bulky signal trans-formers and optocouplers that transmit signals over the isolation boundary. Integrating theiCouplers reduces system design complexity, cost, and component count and improves overall system reliability. With the integrated isolators and metal-oxide semiconductor field effect transistor (MOSFET) drivers on both the primary and the secondary side, the ADP1071-1/ADP1071-2 offer a compact system level design and yield a higher efficiency than a diode rectified flyback converter at heavy loads.Output regulation is achieved by sensing the output voltage on the secondary side, where the feedback and the PWM signals are transmitted between the primary and secondary sides through theiCouplers.The ADP1071-1/ADP1071-2 are offered in a 16-lead SOIC_W package with an isolation voltage rating of 5 kV rms. The ADP1071-2 is designed for isolated dc-to-dc applications typically with an input voltage less than 36 V, and the ADP1071-1 targets high input voltage applications, in which the dc input voltage can exceed 60 V.The ADP1071-1/ADP1071-2 offer features such as input current protection, output overvoltage protection (OVP), undervoltage lockout (UVLO), precision enable with adjustable hysteresis, overtemperature protection (OTP), and power saving light load mode (LLM).ApplicationsIsolated dc-to-dc or ac-to-dc power conversionTelecom, industrialSmall cellPoE powered deviceEnterprise switches and routers

The ADP1074 is a current mode, fixed frequency, active clamp, synchronous forward controller designed for isolated dc to dc power supplies. Analog Devices proprietaryiCouplers®are integrated in the ADP1074 to eliminate the bulky signal transformers and optocouplers that transmit signals over the isolation boundary. Integrating the iCouplers reduces system design complexity, cost, and component count and improves overall system reliability. With the integrated isolators and metal-oxide semiconductor field effect transistor (MOSFET) drivers on both the primary and the secondary side, the ADP1074 offers a compact system level design and yields a higher efficiency than a non-synchronous forward converter at heavy loads.The primary side pins provide functions for programming the switching frequency, maximum duty cycle, external frequency synchronization, and slope compensation.The secondary side pins provide functions for differential output voltage sensing, overvoltage, power good, tracking, and programmable light load mode setting.The feedback signal and timing of synchronous rectifier pulse-width modulations (PWMs) are transmitted from primary to secondary or from secondary to primary sides through theiCouplers using a proprietary transmission scheme.The ADP1074 also offers features such as input current protection, undervoltage lockout (UVLO), precision enable with adjustable hysteresis, overtemperature protection (OTP), and power saving light load mode (LLM).ApplicationsIsolated dc-to-dc power conversionIntermediate bus voltage generationTelecom, industrialBase station and antenna RF powerSmall cellPoE powered deviceEnterprise switches/routersCore/edge/metro/optical routingPower modules

The ADP1111 is part of a family of step-up/step-down switching regulators that operates from an input voltage supply of 2 V to 12 V in step-up mode and up to 30 V in step-down mode. The ADP1111 can be programmed to operate in step-up/stepdown or inverting applications with only 3 external components.The fixed outputs are 3.3 V, 5 V and 12 V; and an adjustable version is also available. The ADP1111 can deliver 100 mA at 5 V from a 3 V input in step-up mode, or it can deliver 200 mA at 5 V from a 12 V input in step-down mode.Maximum switch current can be programmed with a single resistor, and an open collector gain block can be arranged in multiple configuration for low battery detection, as a post linear regulator, undervoltage lockout, or as an error amplifier.APPLICATIONS3 V to 5 V, 5 V to 12 V Step-Up Converters9 V to 5 V, 12 V to 5 V Step-Down ConvertersLaptop and Palmtop ComputersCellular TelephonesFlash Memory VPP GeneratorsRemote ControlsPeripherals and Add-On CardsBattery Backup SuppliesUninterruptible SuppliesPortable Instruments