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

2. 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

3. 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

4. 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 ?

5. 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

6. 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

7. 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.

8. 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
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 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

9. 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 %
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

10. 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