Analog Devices ADP1614 Evaluation Board ADP1614-1.3-EVALZ ADP1614-1.3-EVALZ Hoja De Datos
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ADP1614-1.3-EVALZ
Evaluation Board User Guide
UG-437
Rev. 0 | Page 3 of 8
EVALUATION BOARD HARDWARE
evaluation board is fully assembled and tested.
The following sections describe the various connectors on the
board, the proper evaluation setup, and the testing capabilities
of the evaluation board.
board, the proper evaluation setup, and the testing capabilities
of the evaluation board.
INPUT/OUTPUT CONNECTORS
EN Test Bus
The EN connector is used to enable/disable the converter via
the EN pin. Use one of the following methods to enable the
converter. Do not leave the EN pin floating.
• Use a jumper to connect the top two pins of the EN test
the EN pin. Use one of the following methods to enable the
converter. Do not leave the EN pin floating.
• Use a jumper to connect the top two pins of the EN test
bus. This connects EN to VIN and enables the converter
(see Figure 2).
(see Figure 2).
PLACE
JUMPER
HERE
10859-
002
Figure 2. Enabled Jumper Position
• Use a jumper to connect the bottom two pins of the EN test
bus. This connects EN to GND and disables the converter
(see Figure 3).
(see Figure 3).
PLACE
JUMPER
HERE
10859-
003
Figure 3. Disabled Jumper Position
• Alternatively, connect a voltage between VIN and GND to the
center pin of the EN test bus for independent control of the
EN pin voltage (see Figure 4).
EN pin voltage (see Figure 4).
CONNECT
EXTERNAL
DEVICE
HERE
10859-
004
Figure 4. EN Pin Direct Connection
VIN Test Bus
The VIN test bus connects the positive input supply voltage to
the VIN pin. Connect the power supply to this bus and keep the
wires as short as possible to minimize the EMI transmission.
the VIN pin. Connect the power supply to this bus and keep the
wires as short as possible to minimize the EMI transmission.
SW Test Point
The SW test point is for monitoring the switch node (SW pin)
behavior and switching frequency. Connect a BNC cable to this
test point to measure the
behavior and switching frequency. Connect a BNC cable to this
test point to measure the
switching frequency.
VOUT Test Bus
The output voltage at the VOUT test bus is set by the resistive
voltage divider network, R1 and R2. A load can be attached
from the VOUT test bus to the GND test bus.
voltage divider network, R1 and R2. A load can be attached
from the VOUT test bus to the GND test bus.
GND Test Bus
The GND test bus is the power ground connection for the part
via the GND pin as well as the bypass capacitors. Connect ground
connections from external equipment to this bus.
via the GND pin as well as the bypass capacitors. Connect ground
connections from external equipment to this bus.
EVALUATION SETUP
To ensure proper operation of the
evaluation board:
1. Connect the input supply ground to GND.
2. Connect the positive input supply to VIN.
3. Connect the desired load between VOUT and GND. The
2. Connect the positive input supply to VIN.
3. Connect the desired load between VOUT and GND. The
maximum continuous output current of the
dependent upon the input and output voltage conditions.
4. Apply a voltage between 2.5 V and 5.5 V to the VIN test bus.
5. Move the jumper on the EN test bus to the enabled position.
If the feedback resistors, R1 and R2, are adjusted to change the
output voltage, recalculate the recommended values for the external
components (L1, R
5. Move the jumper on the EN test bus to the enabled position.
If the feedback resistors, R1 and R2, are adjusted to change the
output voltage, recalculate the recommended values for the external
components (L1, R
CL
, C
OUT
, R
COMP
, and C
COMP
) using the applications
information from the
data sheet.
PERFORMANCE EVALUATION
The following sections discuss tests and the resulting oscilloscope
waveforms. Oscilloscope waveforms and typical performance
characteristics are provided in the
waveforms. Oscilloscope waveforms and typical performance
characteristics are provided in the
data sheet.
Line Regulation
The line regulation is observed and measured by monitoring
the output voltage (VOUT) while varying the input voltage (VIN).
the output voltage (VOUT) while varying the input voltage (VIN).
Load Regulation
The load regulation is observed and measured by monitoring the
output voltage (VOUT) while sweeping the applied load between
VOUT and GND. To minimize voltage drop, use short low
resistance wires, especially for heavy loads.
output voltage (VOUT) while sweeping the applied load between
VOUT and GND. To minimize voltage drop, use short low
resistance wires, especially for heavy loads.
Efficiency
The efficiency, η, is measured by comparing the input power to
the output power
the output power
IN
IN
OUT
OUT
I
V
I
V
×
×
=
η
Line Transient
The line transient performance is evaluated by generating a high
speed voltage transient on the input (VIN) and observing the
behavior of the evaluation board at the output (VOUT.)
speed voltage transient on the input (VIN) and observing the
behavior of the evaluation board at the output (VOUT.)
Load Transient
The load transient performance is evaluated by generating a fast
current transient on the output (VOUT) and observing the
behavior of the evaluation board at the output (VOUT.)
current transient on the output (VOUT) and observing the
behavior of the evaluation board at the output (VOUT.)
Oscillator Frequency
The oscillator frequency can be measured by connecting an
oscilloscope to the SW pin.
oscilloscope to the SW pin.
Inductor Current
The inductor current is made accessible by removing one side
of the inductor from its pad and connecting a current loop in
series. Place an oscilloscope current probe on the loop to view
the current waveform.
of the inductor from its pad and connecting a current loop in
series. Place an oscilloscope current probe on the loop to view
the current waveform.