L-ASC10 - Lattice Macnica

Product Summary

L-ASC10 is a power management device capable of integrated monitoring and control of voltage/current/temperature. If there are small CPLDs or medium-sized FPGAs in the system, Lattice FPGAs (XO2/XO3/XO3D/ECP5) and L-ASC10 can be used together to reduce the space and cost of the entire system while achieving power management. Solution proposal is possible. Feasible functions of L-ASC10 are the same as those of Platform Manager 2.

Installed hardware and functions

PLD

Designed to be compact and low cost, L-ASC10 does not have a PLD area. Various controls are performed from Lattice FPGA (XO2/XO3/XO3D/ECP5) via Lattice's unique ASC-I/F. The controlling FPGA can operate in parallel with arbitrary user logic at the same time as power supply control. (The power supply control unit is designed with a GUI on the sub-development tool Platform Designer, and integrated with the user logic on the design development tool Diamond.)

Voltage Monitor Input

10ch analog voltage input is possible. A comparator for voltage monitoring is connected to each input port. By incorporating the comparator output into the sequence, it is possible to create a sequence based on the actual voltage and monitor voltage abnormalities during system operation. It can monitor from 0V to 5.75V, the comparator can be set up to 368 trip points, and the monitoring can be set with a high resolution of 15-20mV. In addition, it has two comparators per channel and can monitor in a window. In addition, it is possible to monitor voltages outside the specified range (including negative voltages) by installing an external circuit, and reference documents are posted on the Lattice website.

Fault Log

By setting any monitoring signal as a trigger, it is possible to detect system anomalies/symptoms and record the comparator output values of various monitoring signals in the built-in EEPROM. By reading the record via the I2C interface, it is useful for various analyzes such as failure. It also supports recording to any external SPI Flash, allowing you to increase the number of recordings.

Current Monitor Input

2ch current monitoring is possible. Both ends of the several milliΩ sense resistor in the power supply circuit are connected to the L-ASC10, but since the device has a built-in amplifier circuit, there is no need for an amplifier circuit on the board, and it is possible to monitor the current in a small space. is.

Temperature Monitor Input

2ch temperature monitoring is possible. The Thermal Diode on the board is connected to the Port of L-ASC10.

Fan control

If a cooling fan is installed in the system, by inputting the PWM signal output from the L-ASC10 to the fan driver, etc., it is possible to easily control fan rotation according to system power consumption and board temperature. is. On the sub-development tool Platform Designer, you can set the frequency/duty of the PWM signal for fan rotation only by GUI operation. In addition, Duty can have 3 types of settings, and it is possible to switch settings with any signal, including the Current/Temperature Monitor signal mentioned above.

Open Drain Output

It has 10ch 5V tolerant Open Drain output ports. Sequence control is possible by inputting to the Enable Port of the DC/DC converter. In addition, it has 4ch 12V tolerant Open Drain output port and MOSFET drive is also possible.

ADC

Equipped with 10bit ADC, each input value of voltage/current/temperature can be read externally via I2C interface.

TRIM Control

It has 4ch trim output. By connecting to a DC/DC converter with a trim port, it is possible to stabilize the output voltage with an accuracy of ±1% or less. Since the L-ASC10 reads the monitored voltage with an ADC and feeds it back, stable output can be expected under temperature and over time while using an inexpensive DC/DC. In addition, since 4 sets of output values can be held per channel, it can also be used for upper and lower limit inspections in shipping inspections.

Example of product use

The figure below is just an example, so please feel free to contact us from the inquiry button at the bottom of this page regarding the feasibility.
An example of system configuration. While using Lattice XO3 with IO Expand or I/F Conversion, power management with small size and low cost is possible by using L-ASC10.

Product lineup

	Hardware Management Controller
parameter	L-ASC10
Voltage Monitoring Inputs	10
Current Monitioring Inputs	2
Temperature Monitioring Inputs	2
Number of Trimming Channels	4
MOSFET Drives	4
On-Chip Non-Volatile Fault Log	✔
Number of LUTs	ー
Distributed RAM (kbits)	ー
EBR SRAM (kbits)	ー
Number of EBR Blocks (9 kbits)	ー
User Flash Memory (kbits)	ー
Number of PLLs	ー
Communication interface	^I2C
Programming Interface	I2C
Operation voltage	3.3V
48-pin QFN (7x7)	9 (Number of Digital Inputs)