ISPPAC-POWR604-01T44E

ISPPAC-POWR604-01T44E FPGAs Overview

The Lattice ispPAC-POWR604 incorporates both insystem programmable logic and in-system programmable analog circuits to perform special functions for power supply sequencing and monitoring. The ispPACPOWR604 device has the capability to be configured through software to control up to four outputs for power supply sequencing and six comparators monitoring supply voltage limits, along with four digital inputs for interfacing to other control circuits or digital logic. Once configured, the design is downloaded into the device through a standard JTAG interface. The circuit configuration and routing are stored in non-volatile E2 CMOS. PAC-Designer, an easy-to-use Windows-compatible software package, gives users the ability to design the logic and sequences that control the power supplies or regulator circuits. The user has control over timing functions, programmable logic functions and comparator threshold values as well as I/O configurations.

The ispPAC-POWR604 device is specifically designed as a fully-programmable power supply sequencing controller and monitor for managing up to four separate power supplies, as well as monitoring up to six analog inputs or supplies. The ispPAC-POWR604 device contains an internal PLD that is programmable by the user to implement digital logic functions and control state machines. The internal PLD connects to two programmable timers, special purpose I/O and the programmable monitoring circuit blocks. The internal PLD and timers can be clocked by either an internal programmable clock oscillator or an external clock source.

The voltage monitors are arranged as six independent comparators each with 192 programmable trip point settings. Monitoring levels are set around the following standard voltages: 1.2V, 1.5V, 1.8V, 2.5V, 3.3V or 5.0V.

All six voltages can be monitored simultaneously (i.e., continuous-time operation). Other non-standard voltage levels can be accounted for using various scale factors.

For added robustness, the comparators feature a variable hysteresis that scales with the voltage they monitor. Generally, a larger hysteresis is better. However, as power supply voltages get smaller, that hysteresis increasingly affects trip-point accuracy. Therefore, the hysteresis is +/-16mV for 5V supplies and scales down to +/-3mV for 1.2V supplies, or about 0.3% of the trip point.

The programmable logic functions consist of a block of 20 inputs with 41 product terms and eight macrocells. The architecture supports the sharing of product terms to enhance the overall usability. The four output pins are open-drain outputs. These outputs can be used to drive enable lines for DC/DC converters or other control logic associated with power supply control. The four outputs are driven from the macrocells.

The Lattice Power Management ICs series ISPPAC-POWR604-01T44E is Supervisory Circuits PROGRAMMABLE PWR SUPPLY CONTR, View Substitutes & Alternatives along with datasheets, stock, pricing from Authorized Distributors at bitfoic.com, and you can also search for other FPGAs products.

Features

■ Monitor and Control Multiple Power Supplies

• Simultaneously monitors and sequences up to six power supplies

• Sequence controller for power-up conditions

• Provides four output control signals

• Programmable digital and analog circuitry

■ Embedded PLD for Sequence Control

• Implements state machine and input conditional events

• In-System Programmable (ISP) through JTAG and on-chip E2 CMOS

■ Embedded Programmable Timers

• Two Programmable 8-bit timers (32µs to 524ms)

• Programmable time delay for pulse stretching or other power supply management

■ Analog Comparators for Monitoring

• Six analog comparators for monitoring

• 192 precise programmable threshold levels spanning 1.03V to 5.72V

• Each comparator can be independently configured around standard logic supply voltages of 1.2V, 1.5V, 1.8V, 2.5V, 3.3V, 5V

• Other user-defined voltages possible

• Six direct comparator outputs

■ Embedded Oscillator

• Built-in clock generator, 250kHz

• Programmable clock frequency

• Programmable timer pre-scaler

• External clock support

■ Programmable Open-Drain Outputs

• Four digital outputs for logic and power supply control

• Expandable with ispMACH 4000 CPLD

■ 2.25V to 5.5V Supply Range

• In-system programmable at 3.0V to 5.5V

• Industrial temperature range: -40°C to +85°C

• Automotive temperature range: -40°C to +125°C

• 44-pin TQFP package

• Lead-free package option