ADI ADP1055ACPZ-R7

The ADP1055 is a flexible, feature-rich digital secondary side controller that targets ac-to-dc and isolated dc-to-dc secondary side applications. 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.

• -40℃ to +125℃ operation
• PMBus Revision 1.2 compliant with PEC and extended manufacturer specific commands
• 32-bit password protection with command masking
• 64 address selections (16 base addresses, expandable to 64)
• 6 PWM control signals, 625 ps resolution
• Frequency from 48 kHz to 1 MHz
• Duty cycle double update rate
• Digital control loop (PID + additional pole or zero configurability)
• Programmable loop filters (CCM, DCM, low/normal temperature)
• Fast line voltage feedforward
• Adaptive dead time compensation for improved efficiency
• Remote voltage sense
• Redundant programmable OVP
• Current sense: Primary side cycle-by-cycle fast protection, Secondary side cycle-by-cycle fast overcurrent protection, Secondary side averaged reverse current protection using diode emulation mode with fixed debounce
• Synchronous rectifier control for improved efficiency in light load mode
• Nonlinear gain for faster transient response from DCM to CCM
• Frequency synchronization
• Soft start and soft stop functionality
• Average and peak constant current mode
• External PN junction temperature sensing
• 4 GPIOs (2 GPIOs configurable as active clamp snubber PWMs)
• Extended black box data recorder for fault recording
• User trimming on input and output voltages and currents
• Digital current sharing

• Isolated dc-to-dc power supplies and modules
• Redundant power supply systems