ALLEGRO APEK81800-1 Evaluation Board User Manual
- June 10, 2024
- ALLEGRO
Table of Contents
ALLEGRO APEK81800-1 Evaluation Board User Manual
GENERAL SPECIFICATIONS
| Specification | Min | Nom. | Max. | Units |
|---|---|---|---|---|
| Absolute Maximum Input Voltage | –0.3 | − | 40 | V |
| Operating Input Voltage Range | 3.5 | 12 | 36 | V |
| VIN START Threshold, VIN rising | 3.35 | 3.55 | 3.80 | V |
| VIN STOP Threshold, VIN falling | 3.10 | 3.30 | 3.50 | V |
| Output Voltage (FB: 732k/140k, ±1%) | 4.85 | 4.98 | 5.11 | V |
| Steady-State Output Current (12 VIN) | − | 0.5 | 0.6 | A |
| Pulse-by-Pulse Current Limit @ tON(MIN) | 0.85 | 1.0 | 1.15 | A |
OPERATING INSTRUCTIONS
Input Power Connection:
Connect a 12 V power supply from VIN to GND that is capable of at least 1 A.
Once operational, VIN can fall as low as 3.55 VTYP (3.8 VMAX) before the
ARG81800-1 is reset.
Output Load Connections:
Connect a load from VOUT to GND. The steady-state load current can be as high
as 0.5 A. Pulse-by-pulse current limit and/or thermal shutdown will occur if
the load is greater than 0.6 A.
EVALUATION BOARD SCHEMATIC
BILL OF MATERIALS
Designator| Description| Value| Footprint| Quantity|
Manufacturer| Manufacturer P/N| Source| Purchase P/N
---|---|---|---|---|---|---|---|---
C1| Capacitor, X7R| 0.1 µF, 50 V| 0603| 1| Murata| GCM188R71H104KA57D|
Digikey| 490-4779-2-ND
C2| Capacitor, X7R| 4.7 µF, 50 V| 1206| 1| Murata| GRJ31CR71H475KE11L|
Digikey| 490-10944-1-ND
C3| Capacitor, X7R| 0.1 µF, 50 V| 0603| 1| Murata| GCM188R71H104KA57D|
Digikey| 490-4779-2-ND
Cs| Capacitor, C0G (NP0)| DNP| 0603| 0| | | |
Cb| Capacitor, X7R| 2.2 µF, 16 V| 0603| 1| Taiyo Yuden| EMK107BB7225KA-T|
Digikey| 587-5835-1-ND
C4| Capacitor, X7R| 0.47 µF, 50 V| 0603| 1| Taiyo Yuden| UMK107B7474KA-TR|
Digikey| 587-3170-1-ND
C5| Capacitor, X7R| 0.1 µF, 50 V| 1206| 1| Murata| GCM319R71H104KA37J|
Digikey| 490-14745-2-ND
C6| Capacitor, X7R| 22 µF, 16 V| 1210| 1| Murata| GRM32ER71C226MEA8L| Digikey|
490-14539-1-ND
C7| Capacitor, X7R| 10 µF, 16 V| 1210| 1| Murata| GRM32DR71C106KA01L| Digikey|
490-1875-2-ND
C8| Capacitor, C0G (NP0)| 4.7 pF, 50 V| 0603| 1| Murata| GCM1885C1H4R7BA16D|
Digikey| 490-14430-2-ND
C9| Capacitor, X7R| 4.7 µF, 16 V| 0805| 1| Murata| GCJ21BR71C475KA01L|
Digikey| 490-10557-1-ND
C9a| Capacitor, X7R| DNP| 0603| 0| | | |
C10| Capacitor,X7R| 22 nF, 50 V| 0603| 1| Murata| GRM188R71H223KA01D| Digikey|
490-5851-1-ND
C11| Capacitor, X7R| 2.2 nF, 50 V| 0603| 1| Murata| GCM188R71H222KA37D|
Digikey| 490-4931-2-ND
C12| Capacitor, C0G (NP0)| 10 pF, 50 V| 0603| 1| Kemet| C0603C100J5GACTU|
Digikey| 399-1049-1-ND
Cb1| Capacitor : Alu Electrolytic SMT| 47 µF, 50 V| 6 mm or 8 mm| 1| Nichicon|
UBT1H470MPD1TD| Digikey| 493-4507-1-ND
Ccpl1| Capacitor, X7R| DNP| 0805| 0| | | |
Cf1| Capacitor, X7R| DNP| 1210| 0| | | |
Cf2, Cf3| Capacitor, X7R| DNP| 1210| 0| | | |
Bias, Dither, Enable| Jumper Header : Male 2-pin| | 0.1″ pitch| 3| Omron|
XJ8B-0211| Mouser| 653-XJ8B-0211
Mode, PGOOD_Jmpr, SYNCINsel| Jumper Header : Male 3-pin| | 0.1″ pitch| 3|
Molex| 22-28-5030| Mouser| 653-XJ8B-0211
Bias, Dither, Enable, Mode, PGOODJmpr, SYNCINsel| Jumper Shunt: 2 positions|
| 0.1″ pitch| 6| TE Connectivity| 382811-6| Mouser| 571-382811-6
BOOT, CLKOUT, EN, FSET, MODEsel, PGOOD, SS, SW, SYNCIN, VIN, VOUT, VPGD, VREG,
X, Y| Test Points – Red| | 0.063″, diameter| 15| Keystone Electronics| 5010|
Digikey| 36-5010-ND
PGND| Test Points – Black| | 0.063″, diameter| 2| Keystone Electronics| 5011|
Digikey| 36-5011-ND
FB1| Ferrite Bead : Chip Impeder| DNP| 0805| 0| | | |
GND1, GND2| Ground Bar : Tinned Copper Wire| | GROUNDBAR 15MMP_20SWG| 2| | |
|
L1| Inductor| 47 µH, 2.2 A| 10 mm × 10 mm| 1| Wurth Electronics| 7447714470|
Digikey| 732-2994-1-ND
Lf1| Inductor| DNP| 8.2 mm × 8.2 mm| 0| | | |
MF1, MF2, MF3, MF4| Mount Foot : Adhesive Rubber| | Clear| 4| 3M| SJ-5303
(CLEAR)| Digikey| SJ5303-7-ND
PL1, PL2, PL3| Terminal Block| | 5.08 mm pitch, Vertical, 2 position| 3|
Phoenix Contact| 1715721| Digikey| 277-1263-ND
R1| Resistor, 1%,1/10 W| 10 kΩ| 0603| 1| Panasonic| ERJ-3EKF1002V| Digikey|
P10.0KHCT-ND
R2| Resistor, 1%,1/10 W| 732 kΩ| 0603| 1| Panasonic| ERJ-3EKF7323V| Digikey|
P732KHCT-ND
R3| Resistor, 1%,1/10 W| 140 kΩ| 0603| 1| Panasonic| ERJ-3EKF1403V| Digikey|
P140KHCT-ND
R4| Resistor, 1%,1/10 W| 90.9 kΩ| 0603| 1| Panasonic| ERJ-3EKF7152V| Digikey|
P71.5KHCT-ND
R5| Resistor, 1%,1/10 W| 34.0 kΩ| 0603| 1| Panasonic| ERJ-3EKF3402V| Digikey|
P34.0KHCT-ND
R6| Resistor, 1%,1/10 W| 10 kΩ| 0603| 1| Panasonic| ERJ-3EKF1002V| Digikey|
P10.0KHCT-ND
R7| Resistor, 1%,1/10 W| 0 Ω| 0603| 1| Panasonic| ERJ-3GEY0R00V| Digikey| P0
.0GCT-ND
RB| Resistor, 1%,1/10 W| 49.9 Ω| 0603| 1| Panasonic| ERJ-3EKF49R9V| Digikey|
P49.9HCT-ND
Rs| Resistor, 1%, 0.25 W| DNP| 1206| 0| | | |
U1| Allegro IC| ARG81800-1| QFN20 4×4| 1| Allegro| ARG81800KESJSR-1| |
Label:| 5.0 Vout, 0.5 A, 400 kHz| | | | | | |
DNP – Do Not Populate
EVALUATION BOARD PERFORMANCE
PCB LAYOUT
Revision History
| Number | Date | Description |
|---|---|---|
| – | December 16, 2019 | Initial Release |
| 1 | December 2, 2022 | Minor editorial updates |
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