Cypress PSoC 3 vs. TI UCD90160 Power Supervision Applications Fail-Safe Supervision for Mission-Critical Systems

Power Supervision is Critical Mission-critical systems require fail-safe power Needed by most FPGA-based and DSP-based systems, including : Telecommunication switches and networking routers Rack-mounted servers and storage arrays Base station infrastructure Industrial automation and medical imaging equipment Power Supervision provides critical reliability functions System power must work flawlessly all the time Power rails must be ramped up and down in proper sequence with proper delays And monitored precisely for irregular activity Fault Detection and recovery must be fast and flawless Your mission-critical systems need fail-safe Power Supervision Storage Arrays Base Stations

TI UCD90160 Overview TI UCD90160 is a 64-pin power supply sequencer and monitor featuring Voltage sequencing for 16 rails 12-bit ADC that allows for voltage monitoring for 16 rails (can be shared to monitor currents using current sensing amplifiers) Closed loop margining/trimming for 10 rails JTAG and I2C/SMBus/PMBus interfaces Non-volatile Flash based fault entries (x12) TI UCD90160

Challenges Using the TI UCD90160 1. Increased # of power rails increases costs and decreases system reliability TI UCD90160 has 26 GPIOs that can be set to different power supervision functions (up to 16 sequencing O/Ps, up to 10 margining O/Ps, etc) and 16 analog inputs (voltage/current monitoring) Newer designs have 20+ power rails that require 2-4 TI UCD90160s for implementing all power supervision capabilities increasing BOM cost Higher # of ICs increases the # of Point of Failures (PoFs) which reduces the system reliability 2. Low-voltage power rails demand better accuracy Accurate voltage and current monitoring is critical to system reliability Trimming voltage accuracy is critical to maintain optimal voltage ranges The latest FPGAs and DSPs have low-voltage rails (1 V and below), requiring sub-0.5% (5-mV) monitoring accuracy and sub-1.0% (10-mV) real-time trimming accuracy TI UCD90160 has a low internal VRef accuracy which leads to a low monitoring and trimming accuracy (>1%) 3. Inflexible I/O system limits customization Not all rails in a system require all power supervision functions and utilize all pins Designers may want to use an unused pin to implement a different/additional function TI UCD90160 has an inflexible I/O system that doesn’t allow an unused pin to be used for another function (e.g. use a sequencing pin to implement temp. sensing) Rack Mounted Servers Each server would require 2-4 TI UCD90160s Have you faced any other challenge ?

Challenges Beyond Power Supervision What else is important to you? System designs need to incorporate additional functions including Temperature monitoring and fan control Communication interfaces like SGPIO I2C multiplexing Glue logic and many more….. These require additional ICs from multiple vendors which increases BOM cost, decreases reliability and increases complexity Ease of design and development Most designs go through long and complex development cycles Designers prefer customizable architectures which allows for last-minute changes during debug and development Solutions need to come with easy-to-use design tools

The Solution You Need A reliable and cost-effective solution that Supports an increased # of rails Offers sub-0.5% monitoring accuracy and sub-1.0% real-time trimming accuracy Offers a flexible and customizable I/O system Integrates additional functions Allows for easy development and debug PSoC 3 solution is the solution you need Supports up to 32 power rails per chip, 2x that of TI UCD90160, and integrates more power supervision capabilities on the same chip; Reduces BOM cost and # of PoFs Monitors voltage and current with 0.26% accuracy and performs real-time trimming with 0.60% accuracy Creates customized power rail configurations that allows for all pins to be utilized Integrates additional functions like fan control, SGPIO, I2C multiplexing etc. on the same chip Enables easy development and debug using the ‘drag-and drop’ PSoC Creator tool Actual PSoC Power Supervision Design with fan controller PSoC 3 creates a One-chip, Customized, Fail-safe Power Supervision Solution

PSoC 3 One-Chip Solution Voltage Sequencer Component PSoC 3 Kit Voltage Sequencer Configuration Tool Power Supervision Kit Ethernet switch by HP PSoC Creator Components integrate typical Power Supervision ICs to create system designs… That are customized in minutes by entering sequencing and monitoring parameters into each of the Component Configuration Tools… And prototyped and validated using the PSoC 3 and Power Supervision Kits… To create a one-chip, customized, fail-safe Power Supervision solution.

2KB EEPROM (up to 62 faults) PSoC 3 v/s TI UCD 90160 Feature PSoC 3 CY8C36xxxx TI UCD 90160 Sequencer – # of Rails Up to 32* Up to 16** ADC – # of Voltage Inputs 16 ADC – # of Current Inputs Up to 24* 16 (Shared with voltage inputs; uses external CSAs) ADC – Accuracy (@1.8V) 0.26% >1%*** Trim/Margin - # of Rails Up to 10** EEPROM Fault Logging - Size 2KB EEPROM (up to 62 faults) None – Flash-based only (12 faults) Sequencer – State Change Time Normal Sequence: 250 μs**** Fault Response: 50 ns Not Specified ADC – Resolution 8-20b 12b ADC – INL 1 LSB 4 LSB ADC – Scan Speed per Rail (@12b resolution) 55 μs (V) 110 μs (I) ~25μs (V) Reference Voltage Accuracy 0.10% 1.00% (*) For a 100 pin TQFP PSoC3, there are 72 GPIOs that can be set to different functions (**) For 64 pin VQFN UCD90160, there are 26 GPIOs that can be set to different functions (***) For operation at -40 to125 C, the accuracy varies from 1.62% at 0.5Vin to 1.14% at 2.2Vin (****) Times are shown for Cypress standard sequencer. Custom sequencer can be developed that can change states in nano sec

PSoC 3 v/s TI UCD 90160 (cont.) Feature PSoC 3 CY8C36xxxx TI UCD 90160 Trim/Margin - H/W Block 24x PWMs, 4x DACs 10x PWMs OV/UV Comparator – # of Rails Up to 32* 6 OV/UV Comparator – Fault Response Time 2 μs per rail ~80μs OV/UV Comparator – Threshold Accuracy 0.8-1.0% Not specified Host Comms Interface - Type I2C, SMBus, PMBus, SPI, USB, UART, CAN, Custom interfaces* I2C,SMBus,PMBus Host Comms Interface - # >1 1 Supply Voltage - Range 1.8 – 5.0V 3.3V IO Pins – HV FET Gate Drivers Yes** No Device Package 100 TQFP, 68 QFN, 48 QFN,48 SSOP 64 VQFN Operating Temperature Industrial: -40 to +85C Extended: -40 to +125C -40 to +110C Integrate Other Features Analog or digital temp sensors,Fan Control, I2C mux, logic functions, etc. (*) For a 100 pin TQFP PSoC3, there are 72 GPIOs that can be set to different functions (**) PSoC can integrate a charge pump using a few external discrete components

PSoC 3 Design Win Example – Desktop Network Switch PSoC Value Block Diagram Design Challenges Improve system reliability while reducing component count Support non-standard Point-of-Loads(PoLs) Support analog temperature sensor like RTDs PSoC Solution Reduces 8 ICs to 1 IC which eliminates 7 PoFs Supports non-standard PoL converters Integrates analog front end for RTD temperature sensors PSoC One-Chip Solution 8 POL Enables Voltage Sequencer Power Good Host 4 Trim/ Margin PMBus 8051 MCU 8 PoLs/ Regulators Fault Detector 8 7 Voltage Power Monitor EEPROM SRAM Flash 4 Current 2 Fan Control 2 Vref Suggested Collateral RTD Power Supervisor Components ADC + PGA M U X App Notes: Fan Controller, Voltage Sequencer Kits: PSoC 3 Kit (CY8CKIT-030) PSoC Power Supervisor Kit (CY8CKIT-035) PSoC Thermal Management Kit (CY8CKIT-036) IDAC Desktop Network Switch by HP With sequencing and monitoring for 8 power rails, fan control for 2 fans and RTD temperature sensing Competition TI UCD90160