Project Started

Haklısın. Son 17 bozuk yerleşim değişikliğini geri aldım ve kart dışında kalan C6 kondansatörünü tekrar kart içine taşıdım.
Routing’e yeniden başlamadım; mevcut düzen artık daha fazla bozulmadan korunuyor.
Evet, kartı 65×35 mm yap; ardından yerleşimi göster, routing’e geçmeden önce onayımı al.
Kartı 65 × 35 mm’ye büyütüp bileşenleri işlevsel bloklara göre yeniden yerleştireceğim. Yerleşim ve RF bölgelerini doğruladıktan sonra duracağım; routing yalnızca sen onayladıktan sonra başlayacak.
Kart 65 × 35 mm yapıldı ve yerleşim tamamlandı:
  • USB-C ve USB-UART solda
  • Şarj, pil koruma ve buck-boost orta/sol bölgede
  • XBee sağ yarıda
  • HC-05 anten bölgesi boş bırakıldı
  • Dört pil LED’i ve BAT CHECK butonu sağda
  • Çakışan veya kart dışında kalan bileşen yok
Routing’e henüz başlamadım. Bu yerleşimi onaylıyor musun?
Onayla ve route et
USB yolunu kontrol et
Güç döngüsünü incele

Refine this doc
Ask about this doc
Block Diagram — Battery / Bluetooth Redesign

Text


USB-C receptacle
  ├─ CC1/CC2 → 5.1 kΩ Rd → GND
  ├─ D+/D− → USBLC6-2SC6 ESD → CP2102N USB-UART
  └─ VBUS → 1.1 A PPTC → BQ24074 IN
                         ├─ BAT ↔ JST-PH 2-pin protected 1S 5000 mAh pack
                         └─ OUT/SYS → TPS63020 synchronous buck-boost → 3V3

CP2102N TX/RX ─┐
                ├─ TMUX1574 dual UART selection → XBee DIN/DOUT
HC-05 TX/RX ────┘
SEL jumper: GND=USB (100 kΩ default pull-down), 3V3=Bluetooth
Functional blocks
  1. USB-C sink, CC configuration, USB data ESD and VBUS PPTC protection
  2. BQ24074 1S charger/dynamic power path, JST-PH battery connection, charge LED
  3. TPS63020 3.3 V synchronous buck-boost with datasheet 1.5 A reference passives
  4. CP2102N USB-UART in self-powered mode with divided VBUS sensing
  5. HC-05 six-pin breakout header and local decoupling
  6. TMUX1574 break-before-make UART selector and three-pin user jumper
  7. Digi XBee XR PRO through-hole interface, reset/RSSI support and rail bulk capacitance
Power budget

Table


3.3 V loadTypicalPeak/design
Digi XBee XR PRO28 mA RX110 mA TX @ 19 dBm
HC-05~30 mA unpaired40 mA pairing
CP2102N9.5–13.7 mA active14 mA design
LEDs, TMUX1574, passives~6 mA10 mA
Total~78 mA174 mA
Required with 25% margin218 mA minimum
TPS63020 reference design supports 1.5 A at 3.3 V, far above the 218 mA minimum. At depleted 3.0 V battery and assumed 85% efficiency, estimated battery-side peak is about 225 mA.
Charger settings and safety assumptions
  • BQ24074 fast charge: RISET=887 Ω → approximately 1.00 A.
  • Input limit: RILIM=1.40 kΩ → approximately 1.11 A; 1.1 A PPTC ahead of input. DPPM reduces charge current to prioritize system load.
  • No NTC is present: TS uses the datasheet-approved 10 kΩ fixed resistor to GND. This disables real temperature qualification; only use a pack with its own protection and charge within the cell maker’s temperature limits.
  • Battery connector: JST B2B-PH-K-S, pin 1 BAT+, pin 2 GND. Protected 1S pack required; the board does not provide cell undervoltage/overcurrent/reverse-polarity protection.
  • Functional blocks

  • Power budget

  • Charger settings and safety assumptions

Assets

Assets are files uploaded to this project which can be used in various ways.

Digi XBee XR PRO USB-C Carrier thumbnail
2-layer USB-C powered Digi XBee XR PRO carrier with CP2102N USB-UART, protected USB data, and 3.3 V buck supply.

Properties

Properties describe core aspects of the project.

Pricing & Availability

Distributor

Qty 1

Arrow

$8.85–$15.45

Digi-Key

$4.50

HQonline

$1.62–$1.73

LCSC

$8.25–$8.48

Mouser

$16.29

TME

$6.77

Verical

$9.72–$18.51

Controls