EVAL-CN0190-EB1Z Overview

CN0190 is a reference solution for multivoltage power systems. The design can easily be adapted to customer requirements and provides the most popular system voltages. The circuit uses an optimum combination of switching and linear regulators to provide an overall efficiency of approximately 78% when the outputs are fully loaded. Output power delivered under full load is approximately 25 W.

The circuit supplies most of the typical power rails required for digital and analog circuits and also demonstrates an easy way to realize overvoltage, undervoltage, and overcurrent detection and protection. In addition, this module shows how to implement sequencing and power margining control.

The circuit is flexible and can accept a wide input voltage range from 6 V to 14 V. This is possible because the highly efficient switching controllers and regulators used in the first stage of each power rail have correspondingly wide input ranges. The ADM1178 block provides overvoltage and overcurrent detection and protection for the input supply, as well as hotswap control for the whole system. The ADM1066 offers a single-chip solution for power supply monitoring and sequencing control for all of the 12 power rails and also margining control for the 3.3V(2A) rail.

Equipment Needed (Equivalents Can be Substituted)

* Tektronix TDS3034B 4-channel 300 MHz color digital phosphor oscilloscope
* Tektronix P6139A, 500 MHz, 8 pF, 10 MΩ, 10× passive prob
* Agilent N3302A, 150 W, 0 A to 30 A, 0 V to 60 V electronic load module combined with N3300A
* Agilent E3631A, 0 V to 6 V, 5 A; 0 V to ±25 V, 1 A, triple output dc power supply
* Agilent 3458A, 8.5 digit digital multimeter
* Fluke 15B digital multimeter
* USB-SMBUS-CABLE Z (USB-to-I2C interface dongles), or CABLE-SMBUS-3PINZ (parallel port to I2C interface cables)
* PC (Windows 2000 or Windows XP) with USB interface

General Setup

Test Setup Functional Block Diagram

Power Rails Efficiency Measurements

Efficiency = POUT/PIN = (VOUT × IOUT) ÷ (VIN × IIN)
- POUT can be calculated by multiplying VOUT by IOUT
- VIN and IIN can be read directly from the display window of the Agilent E3631A dc power supply
- Electronic load should be set to constant current mode

Ripple and Transient Response Measurements

- Channel A of the oscilloscope monitors the output voltage of the module
- Channel B monitors the voltage across the 0.1 Ω current sense resistor, which is proportional to the load current
- Electronic load should be set to “switch” mode with preset amplitude and frequency

Connectors and Jumper Configurations

Description
1 - +6V to +14V input power supply
2 - +3.3V (2A) power rail based on synchronous buck topology
3 - +1.8V (1A) power rail based on synchronous buck topology
4 - +1.5V (1A) power rail based synchronous buck topology
5 - +1.0V (2A) power rail supplied by LDO
6 - +1.2V (0.5A) power rail based on synchronous buck topology
7 - +3.0V (0.1A) power rail supplied by LDO
8 - -5V (0.2A) power rail generated from 5V (1A) using inverting buck boost topology
9 - +5V (1A) power rail based on synchronous buck topology
10 - +2.5V (1A) power rail based on synchronous buck topology
11 - +3.3V (0.1A) power rail supplied by LDO
12 - Can be set to four different positive analog power rail (+2.5V, +5V, +12V, +15V) (0.1 A) based on sepic-cuk topology
13 - Can be set to four different negative analog power rail (-2.5V, -5V, -12V, -15V) (0.1 A) based on sepic-cuk topology
14 - Switch settings for different positive and negative analog power rail

15 - I2C serial interface connected to PC (1- SCLK, 2 - SDA, 3 - GND)

You can design your own control strategy and download it into the ADM1066 through this I2C bus connector JP1 to make the power monitoring and sequencing control for your own application using the ADM106x Super Sequencer Evaluation Board Software

Software and Driver Installation

1. Install USB-SDP-CABLEZ driver
1.1 Open the file setup.exe located at the path \ADMxxxx Run-Time Installer\Installer\Volume\setup.exe

It is recommended that you install the software to the default directory.

1.2 Follow the on-screen prompts to install the software

1.3 After installing the driver successfully, Windows can automatically find new hardware when you plug the USB- SDP-CABLEZ into the PC.

2. Install the SuperSequencer Application Software
2.1 Open the file setup.exe located at the path \SuperSequencer Apps SW Installer\Volume\setup.exe

It is recommended that you install the SuperSequencer Evaluation Software to the default directory path C:\Program Files\

2.2 Follow the on-screen prompts to install the software

2.3 Install Graphviz

2.4 Upon completion, follow the on-screen promps to install the prog106x Setup Application Software