ADP1055 Digital Controller for Power Supply Applications with PMBus Interface
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 moni-toring and system test functions. The ADP1055 is available in a 32-lead LFCSP and operates from a single 3.3 V supply.
Applications
- Isolated dc-to-dc power supplies and modules
- Redundant power supply systems
Features and Benefits- −40°C to +125°C operation with EEPROM data retention of 15 years at 125°C
- PMBus Revision 1.2 compliant
- 32-bit password protection with command masking
- 64 address selections (16 base addresses, expandable to 64)
- 6 PWM control signals, 625 ps resolution
- Duty cycle double update rate
- Digital control loop (PID + additional pole or zero configurability)
- Programmable loop filters (CCM, DCM, low/normal temperature)
- 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)
- Fast line voltage feedforward
- Adaptive dead time compensation for improved efficiency
- Extended black box data recorder for fault recording
- See datasheet for additional features
| Software & Systems Requirements |
Data Sheets
Application Notes
User Guides
Order Information
| Part Number | Package | Packing Qty | Temp Range | Price 100-499 | Price 1000+ | RoHS |
|---|
| ADP1055ACPZ-R7 Production | 32 ld LFCSP (5x5x.75mm) w/3.6exposed pad | REEL 1500 | -40 to 125C | 0 | 4.6 | Y |
| ADP1055ACPZ-RL Production | 32 ld LFCSP (5x5x.75mm) w/3.6exposed pad | REEL 5000 | -40 to 125C | 0 | 4.6 | Y |
Evaluation Boards
| Part Number | Description | Price | RoHS |
|---|
| ADP1055DC1-EVALZ | ADP1055 Daughter Card | 100 | Y |
| ADP1055-EVALZ | ADP1055 Evaluation Board | 300 | Y |
| ADP-I2C-USB-Z | USB to I2C Adapter | 250 | Y |
Reference Materials
