PCB Power Management

flux

La arquitectura queda validada con BQ24075RGTT, MAX17048G+T10, STM6600CS25DM6F, TPS63070RNMR para 3,3 V y TPS61236PRWLR para 5 V. También seleccioné el conector USB4215-03-A, el termistor TX08F103F3435ER y protección de celda basada en BQ29700DSER.
Corrección importante: 604 Ω es correcto para ISET ≈ 1,47 A, pero 1,05 kΩ no es válido para ILIM porque el mínimo recomendado es 1,10 kΩ; usaré 1,10 kΩ, que programa aproximadamente 1,46 A con el factor típico actual. Además, el NTC directo produce aproximadamente una ventana de 0–50 °C, por lo que hará falta un corte adicional si 45 °C es obligatorio.
Pendiente
  • Cerrar el circuito exacto de corte térmico a 45 °C y comprobar disipación del cargador.
  • Documentar la BOM completa y construir/verificar el esquemático.
  • No pude continuar porque ya no hay ACUs disponibles.

flux

Aceptado. Verificaré las relaciones TS exactas del BQ24075 para calcular la red 0–45 °C y sustituiré el elevador de 5 V por una opción de bajo consumo evaluada también por su impacto EMI sobre GNSS L1/L5.

flux

Acepto el cambio del riel de 5 V a TPS61099DRVR, con 2,2 µH, 10 µF de entrada y ≥20 µF efectivos de salida. Tiene ~1 µA de reposo y soporta el margen requerido, aunque su control histérico/burst implica frecuencia variable; habrá que contener EMI mediante colocación y filtrado.
Corrección importante: la red TS pasiva del BQ24075 no puede estrechar la ventana nominal de 0–50 °C a 0–45 °C; TI indica que Rs/Rp solo permite ampliarla. Al resolver 0 °C/45 °C con 75 µA, 2,1 V y 0,3 V se obtiene Rs negativa (~−0,85 kΩ), físicamente imposible. Para garantizar 45 °C necesitaremos un comparador/interruptor térmico adicional, otro cargador con umbrales configurables, o aceptar el corte nominal cercano a 50 °C.
Comparador térmico externo
Evaluar otro cargador
EMI del elevador 5 V
Documentar decisiones térmicas
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  • Generic Inductor
    Generic Inductor
    A generic fixed inductor suitable for rapid circuit topology development. The footprint automatically adapts based on the selected package, supporting standard SMD sizes (e.g., 0402, 0603, 0805) as well as well-known inductor packages such as SDR1806, PA4320, SRN6028, and SRR1260. Standard inductor values: 1.0 nH, 10 nH, 100 nH, 1.0 µH, 10 µH, 100 µH, 1.0 mH 1.2 nH, 12 nH, 120 nH, 1.2 µH, 12 µH, 120 µH, 1.2 mH 1.5 nH, 15 nH, 150 nH, 1.5 µH, 15 µH, 150 µH, 1.5 mH 1.8 nH, 18 nH, 180 nH, 1.8 µH, 18 µH, 180 µH, 1.8 mH 2.2 nH, 22 nH, 220 nH, 2.2 µH, 22 µH, 220 µH, 2.2 mH 2.7 nH, 27 nH, 270 nH, 2.7 µH, 27 µH, 270 µH, 2.7 mH 3.3 nH, 33 nH, 330 nH, 3.3 µH, 33 µH, 330 µH, 3.3 mH 3.9 nH, 39 nH, 390 nH, 3.9 µH, 39 µH, 390 µH, 3.9 mH 4.7 nH, 47 nH, 470 nH, 4.7 µH, 47 µH, 470 µH, 4.7 mH 5.6 nH, 56 nH, 560 nH, 5.6 µH, 56 µH, 560 µH, 5.6 mH 6.8 nH, 68 nH, 680 nH, 6.8 µH, 68 µH, 680 µH, 6.8 mH 8.2 nH, 82 nH, 820 nH, 8.2 µH, 82 µH, 820 µH, 8.2 mH #generics #CommonPartsLibrary
    jharwinbarrozo
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  • Generic Capacitor
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    A generic fixed capacitor ideal for rapid circuit topology development. You can choose between polarized and non-polarized types, its symbol and the footprint will automatically adapt based on your selection. Supported options include standard SMD sizes for ceramic capacitors (e.g., 0402, 0603, 0805), SMD sizes for aluminum electrolytic capacitors, and through-hole footprints for polarized capacitors. Save precious design time by seamlessly add more information to this part (value, footprint, etc.) as it becomes available. Standard capacitor values: 1.0pF, 10pF, 100pF, 1000pF, 0.01uF, 0.1uF, 1.0uF, 10uF, 100uF, 1000uF, 10000uF 1.1pF, 11pF, 110pF, 1100pF 1.2pF, 12pF, 120pF, 1200pF 1.3pF, 13pF, 130pF, 1300pF 1.5pF, 15pF, 150pF, 1500pF, 0.015uF, 0.15uF, 1.5uF, 15uF, 150uF, 1500uF 1.6pF, 16pF, 160pF, 1600pF 1.8pF, 18pF, 180pF, 1800pF 2.0pF, 20pF, 200pF, 2000pF 2.2pF, 22pF, 220pF, 2200pF, 0.022uF, 0.22uF, 2.2uF, 22uF, 220uF, 2200uF 2.4pF, 24pF, 240pF, 2400pF 2.7pF, 27pF, 270pF, 2700pF 3.0pF, 30pF, 300pF, 3000pF 3.3pF, 33pF, 330pF, 3300pF, 0.033uF, 0.33uF, 3.3uF, 33uF, 330uF, 3300uF 3.6pF, 36pF, 360pF, 3600pF 3.9pF, 39pF, 390pF, 3900pF 4.3pF, 43pF, 430pF, 4300pF 4.7pF, 47pF, 470pF, 4700pF, 0.047uF, 0.47uF, 4.7uF, 47uF, 470uF, 4700uF 5.1pF, 51pF, 510pF, 5100pF 5.6pF, 56pF, 560pF, 5600pF 6.2pF, 62pF, 620pF, 6200pF 6.8pF, 68pF, 680pF, 6800pF, 0.068uF, 0.68uF, 6.8uF, 68uF, 680uF, 6800uF 7.5pF, 75pF, 750pF, 7500pF 8.2pF, 82pF, 820pF, 8200pF 9.1pF, 91pF, 910pF, 9100pF #generics #CommonPartsLibrary
    jharwinbarrozo
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  • Generic Resistor
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  • Terminal
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    T491D226K025AT
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Módulo de Energía ESP32 21700

Módulo de Energía ESP32 21700 thumbnail
Breakout de energía para una celda 21700 con entrada USB-C, cargador power-path, fuel gauge, encendido por pulsador y salidas reguladas de 3,3 V y 5 V para una PCB ESP32-S3.

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