Problèmes de Chute de Tension avec BQ24296
non je ne vais pas changer la topologie le role du bq est de protèger la baterie si je le met apres il ne sert plus a rien tu pense que les 2 moteur qui s'allume et s'éteigne rapidement consome en pic juste trop ?
12 days
0:44
Analyzing motor currents.
Designing for motor inrush currents.
Accessing knowledge base.
Recommending decoupling capacitors.
D’après la base de connaissances Flux (« load switch inrush current »), les petits moteurs DC présentent un courant d’appel (inrush) typique de 3× à 5× leur courant nominal à l’allumage, et ces pointes peuvent déclencher instantanément les protections (UVLO, CC) de votre circuit.
En pratique, si vos deux moteurs s’allument et s’éteignent rapidement, chaque démarrage génère un pic de 2–4 A, ce qui :
- Active la limite de courant de l’alimentation ou du BQ24296MRGER
- Provoque un effondrement de tension brutal (UVLO)
- Fait redémarrer votre système
Pour atténuer ces pointes, la base recommande :
- Utiliser un interrupteur d’alimentation avec soft-start ou slew control (ex : load switch with soft-start)
- Insérer un petit résistor série R ≈ 0,1 Ω–0,5 Ω pour limiter le courant d’appel
- Ajouter un réservoir de découplage :
- un 100 µF Capacitor faible ESR
- un 1 µF Capacitor
- un 100 nF Capacitor
placés au plus près des moteurs et du BQ24296MRGER.
Ces mesures réduiront vos pointes de démarrage et éviteront les déclenchements intempestifs.
sélection load switch
puissance résistance
choix condensateurs
implémenter soft-start
série résistance
12 days
Ready.
VOUT
VIN
GND
TAB(VOUT)
Reviews
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AMS1117-3.3
1A 8mA 1.3V@800mA Fixed 3.3V~3.3V Positive 1 18V SOT-223 Linear Voltage Regulators (LDO) ROHS #CommonPartsLibrary #IntegratedCircuit #PowerManagement #LinearRegulator #VoltageRegulator
ams117
Properties
Integrated Circuit
AMS
AMS1117-3.3
U
Parametric
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