Instrukcja obsługi Microchip MIC23451-AAAYFL
Microchip
nieskategoryzowany
MIC23451-AAAYFL
Przeczytaj poniżej 📖 instrukcję obsługi w języku polskim dla Microchip MIC23451-AAAYFL (7 stron) w kategorii nieskategoryzowany. Ta instrukcja była pomocna dla 8 osób i została oceniona przez 4.5 użytkowników na średnio 4.4 gwiazdek
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MIC23451 Evaluation Board
3MHz PWM Triple 2A Buck Regulator with
HyperLight Load
®
and Power Good
HyperLight Load is a trademark of Micrel, Inc.registered
Micrel Inc. • 2180 Fortune Drive • Jose, CA 95131 • USA • tel +1 (408) 944 0800 • fax + 1 (408) 474 1000 • San - - http://www.micrel.com
October 14, 2013
Revision 1.0
General Description
This board allows the customer to evaluate the MIC23451,
a fully- -integrated, triple output, 2A, 3MHz switching
regulator that features HyperLight Load® mode and Power
Good output indicators. The MIC23451 is highly efficient
throughout the output range, drawing just 24current µA of
quiescent current for each channel in operation. The tiny
4mm × 4mm DFN package saves precious board space
and requires few external components. The MIC23451
provides accurate output voltage regulation under the most
demanding conditions, each channel respondwith ing
extremely quickly to a load transient with exceptionally
small output voltage ripple.
Requirements
This board needs a single bench power source 20W
adjustable from 2.7V to 5.5V. The loads can be either
active (electronic load) or passive (resistor), and must be
able to dissipate 10 . It is ideal, but not essential, to have W
an oscilloscope available to view the circuit waveforms.
The simplest tests require two voltage meters to measure
input and output voltage. Efficiency measurements for a
single channel require two voltage meters and two
ammeters to prevent errors caused by measurement
inaccuracies.
Precautions
There is no reverse input protection on this board. Be
careful when connecting the input source to make sure
correct polarity is observed.
Datasheets and support documentation are available on
Micrel’s web site at: www.micrel.com.
Getting Started
1. Connect an external supply to the VIN (J1) terminal
and GND (J ).2
With the output of the power supply disabled, set its
voltage to the desired input test voltage (2.7V ≤ VIN ≤
5.5V). An ammeter may be placed between the input
supply and the VIN (J1) terminal. Be sure to monitor
the supply voltage at the VIN (J1) terminal, as the
ammeter and/or power lead resistance can reduce the
voltage supplied to the device.
2. Connect a load to the VOUT terminals (J6, J7, J8)
and ground (J3, J4, J5) terminals.
The load can be either passive (resistive) or active
(electronic load). An ammeter may be placed between
the loads and the output terminal sure the s. Make
output voltage is monitored at the VOUT (J6, J7, J8)
terminals.
3. Enable the MIC23451.
The MIC23451 evaluation board has a pull-up resistor
to VIN for each channel. By default, output voltage each
is enabled when an input supply of > V is applied. 2.7
To disable the device, apply a voltage below 0.4V to
the EN (J10, J12, J14) terminals.
4. Power Good.
The board provides a ood test point 9, J11, GPower (J
J13) to monitor the Power Good function for each
individual channel. The Power Good output goes high
(VOUT) approximately after the output voltage 60µs
reaches 90% of its nominal voltage.
Ordering Information
Part Number Description
MIC23451-AAAYFL EV Adjustable Output Evaluation Board
Specyfikacje produktu
| Marka: | Microchip |
| Kategoria: | nieskategoryzowany |
| Model: | MIC23451-AAAYFL |
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