DC1540A Linear Technology, DC1540A Datasheet - Page 14

• Manufacturer Part Number: DC1540A
• Description: LTC2978 Demoboard (includes DC1360A + DC1361A), Requires DC1613A
• Manufacturer: Linear Technology
• Series: -r

Specifications of DC1540A

• Design Resources: DC1540 Design File
• Main Purpose: Power Management, Power Supply Supervisor/Tracker/Sequencer
• Embedded: No
• Utilized Ic / Part: LTC2978
• Primary Attributes: Voltage Detector & Supervisor
• Secondary Attributes: -
• Kit Application Type: Power Management
• Application Sub Type: Power Supply Controller
• Features: Demonstration System For The LTC2978 Octal I2C / SMBus / PMBus Power Supply Monitor & Controller
• Lead Free Status / Rohs Status: Not applicable / Not applicable

DEMO MANUAL DC1540A
DC1361A – ADJUSTING THE MARGIN/TRIM RANGE AND RESOLUTION
The resolution and range can be adjusted for any output
on the DC1361A by simply replacing the below resistors.
Use the LTC2978 Resistor Selection Tool (spreadsheet)
for calculating resistors values and proper DAC range
settings.
The design tool refers to R20. This is the upper divider
resistor which is 60.4kΩ inside the LTM4603.
The design tool refers to R10. This is the lower divider
resistor which is R
14
SET
(See Figure 9).
CHANGE THESE RESISTORS TO ADJUST THE MARGIN RANGE/RESOLUTION
R55
R80
Figure 10. Margin/Trim Resistor Locations
R56
R74
The design tool refers to R30. This is the margin/trim
adjustment resistor.
On the DC1361A, the lower divider resistors (R10) are =
R
R73, R79.
On the DC1361A, the adjustment resistors (R30) are =
R55, R56, R57, R58, R59, R68, R74 and R80.
SET
R57
for each channel = R21, R26, R29, R38, R48, R67,
R68
R58
R59
dc1540af