NCN8025AMNGEVB ON Semiconductor, NCN8025AMNGEVB Datasheet - Page 2

• Manufacturer Part Number: NCN8025AMNGEVB
• Description: Power Management IC Development Tools NCN8025AMNTXG
• Manufacturer: ON Semiconductor
• Type: Other Power Managementr

Specifications of NCN8025AMNGEVB

• Rohs: yes
• Product: Evaluation Boards
• Tool Is For Evaluation Of: NCN8025A

TEST PROCEDURE
Initial Setups
starting measurements on the board.
•
•
•
•
DC Power Supplies
V
Table 1. CVCC Programming
DDP
See Figure 2.
The initial setups given here are recommended before
Two power supplies are used to bias the demo board.
Set the CMDVCC/ in the OFF position (High).
Set CLKDIV1 and CLKDIV2 into low position (lowest
frequency Fclkin)
2 pins are used to change the Card V
or the smart card interface mode which can be 1.8 V,
3.0 V or 5.0 V. These 2 pins are VSL0 and VSEL1 and
on the board, changing VSEL0 and VSEL1 is done
using 2 corresponding switches (see Figure 2)
according to the below Table 1. When VSEL0 = 0 then
VSEL1 is in the mode 5 V/3 Vbar, when VSEL0=1
then VSEL1 is in the mode 1.8 V / 3 Vbar. The initial
setup can be VSEL0 = 0 and VSEL1 = 1 for selecting
the 5 V mode. The card V
cannot be changed on the fly when the smart card
interface is active (/CMDVCC = Low). For changing
card V
reconfigure the card V
VSEL0 and VSEL1 finally the smart can be activated
again with this new smart card power supply voltage.
As a precaution, turn the 1 kW potentiometer to obtain a
resistor output value of 1 kW, and then connect the
jumper.
VSEL0
0
0
1
1
is the input voltage of LDO Regulator. V
CC
it is necessary to deactivate the device then to
VSEL1
0
1
0
1
CC
by setting the appropriate
CC
(CVCC) output voltage
CC
CVCC
3.0 V
5.0 V
3.0 V
1.8 V
power supply
DD
http://onsemi.com
is the
2
“digital” power supply which biases the input stages of the
NCN8025A device (control and signal inputs).
correct operation. Connect the V
supplies using the 2 pin male connectors J2 and J1
respectively.
Clock Frequency
according to the table given below.
Card Presence
chosen; nevertheless the PRES and PRES/ test points can
also be used for signaling the presence of a card and starting
up the circuit.
The Clock
Start the Measurement
•
•
•
•
Table 2. Clock Division Ratio Programming
V
CLKDIV1 and CLKDIV2 select the frequency divider
The socket we use is a normally open, so PRES/ has been
The clock is applied externally (SMB connector).
To start the measurments, set the board as it follows:
Set CLKDIV1 and CLKDIV2 to select the correct
frequency.
Set 5 V / 3 Vbar to select the correct output voltage.
Jumpers:
the measure.
Finally, toggle /CMDVCC from High to Low to start
the device (activation sequence run).
CLKDIV1
DD
− 1 kW potentiometer jumper: not connected to start
1
1
0
0
and V
DDP
CLKDIV2
must be connected to the board to ensure
0
1
1
0
DD
and V
Divider
DIV 1/1
DIV 1/2
DIV 1/4
DIV 1/8
DDP
power