DC2467A Analog Devices

DEMO MANUAL DC2467A LTC2970 Dual Power Supply Monitor Linduino Shield with LTC3604 and LT3581 Regulators Description The DC2467 Linduino shield is a demonstration system configured to step down the +12V input to +5V at 1A. The for the LTC 2970 dual power supply monitor and margin- LT3581 is a multifunction switching regulator, configured ing controller. The LTC2970 provides a rich set of features here as an inverting DC/DC converter producing 5V at 1A. for monitoring and controlling two power rails, including DC2467 Features monitoring supply voltage and current, detecting faults in voltage and current, margining the supply voltage high or n Demonstrate the Capabilities of the LTC2970 low, measuring temperature, and turning the supplies on n Two Onboard Power Supplies: +5V and 5V and off through GPIO pins. It is fully accessible through n Monitor Supply Voltage and Current 2 the built-in I C bus, which allows it to communicate with n Adjust Supply Voltage Higher or Lower on Command 2 an external microcontroller or other I C bus master. n Monitor Voltage and Current Faults with Adjustable Thresholds The DC2467 Linduino shield operates in conjunction with n Monitor LTC2970 Die Temperature a Linduino One (DC2026) and with a DC1613 controller. n Connect to both Linduino and LTpowerPlay The Linduino is a microcontroller that comes with a full n Demonstrate C Code Available for the LTC2970 library of existing C code examples, as well as the capa- bility to run custom C code to control the LTC2970. The DC2467 Hardware Required DC1613 enables a PC running LTpowerPlay to access n DC2467 Shield the LTC2970 on the DC2467. Linduino and LTpowerPlay n Linduino One (DC2026) cooperate to enable code development and debugging in 2 n USB-to-I C/SMBus/PMBus Controller (DC1613) one convenient system. n +12V Power Supply On the DC2467 board, two DC/DC switching regulators n 2 USB Cables provide +5V and 5V power outputs and demonstrate Design files for this circuit board are available at how the LTC2970 monitors and controls power supplies DEMO MANUAL DC2467A Description 2 I C ACTIVITY LED 2 2 I C ALERT LED I C TURRETS DC1613 +5V OUTPUT CONNECTOR GPIO LEDS LTC2970 5V OUTPUT POWER LEDS DC2467 BOARD performance s ummary Table 1. LTC2970 Performance Summary PARAMETER CONDITIONS VALUE 12VIN Supply Input Voltage Range 8V to 15V VDD Regulator Voltage Range 4.75V to 5.25V ADC Total Unadjusted Error V = 3V 0.5% IN ADC Input Range 0V to 6V ADC Resolution Resolution = 8.192V/16384 500V/LSB ADC Conversion Time 33.3ms Margining DAC Resolution 8-bits Temperature Sensor Resolution 0.25C/LSB 2 I C Serial Clock Frequency 10kHz to 400kHz Table 2. DC2467 Performance Summary PARAMETER CONDITIONS VALUE VOUT CH0 Untrimmed +5V 50mV IOUT CH0 (Max) T = 25C 1A VOUT CH0 Servo Range 0.8V VOUT CH1 Untrimmed 5V 50mV IOUT CH1 (Max) T = 25C 1A VOUT CH1 Servo Range 0.75V dc2467af 2