IP5506_BZ_188

@@ -0,0 +1,60 @@+# IP5506_BZ_188++**INJOINIC** · Battery Management · SOP-16++IP5506_BZ_188 from INJOINIC, in a SOP-16. Pinout and pin descriptions extracted from the manufacturer datasheet by ds2sf; symbol, footprint, and 3D from KiCad-official CAD.++## Pinout++| Pin | Name | Type | Function |+|---|---|---|---|+| 1 | VOUT | power_out | DC-DC 5V boost output. Typ 5.12V @ 0A, 5.0V @ 2.4A load; supports up to 2.1A continuous. Bypass close to pin with bulk + ceramic caps. |+| 2 | VIN | power_in | DC-DC 5V charging input from external adapter/USB-B. Recommended 4.5-5.8V; OVP 5.8V typ, UVP 4.5V typ; absolute max 12V. |+| 3 | KEY | input | User pushbutton input and flashlight (WLED) drive pin. Short-press to power on, long-press ~2s to toggle flashlight; behavior selected by FSEL resistor. |+| 4 | LED5 | output | Digital-tube / battery-gauge LED drive pin 5. Drives one segment of the 188-type 7-segment display (or one of the 5 battery-level LEDs). ~5 mA typ (4-8 mA). |+| 5 | LED4 | output | Digital-tube / battery-gauge LED drive pin 4. ~5 mA typ IO drive current. |+| 6 | LED3 | output | Digital-tube / battery-gauge LED drive pin 3. ~5 mA typ IO drive current. |+| 7 | LED2 | output | Digital-tube / battery-gauge LED drive pin 2. ~5 mA typ IO drive current. |+| 8 | FCap | input | Battery-cell initial capacity setting pin (used by the internal fuel gauge to seed the Coulomb-counter model). |+| 9 | FSEL | input | Key/flashlight behavior select. Resistor-to-GND chooses one of five modes: 1K, 33K, 51K, 82K, 100K (each selects a different short/long-press and flashlight scheme; 100K enables vibration-switch mode). |+| 10 | LED1 | output | Digital-tube / battery-gauge LED drive pin 1. ~5 mA typ IO drive current. |+| 11 | VSET | input | Battery-type (CV target) select. Resistor divider from VCC sets CV target: GND=4.20V, 1V=4.30V, VCC=4.35V, 2V=4.40V. Example dividers: NC/0R, 300K/150K, 0R/NC, 150K/300K per Fig. 8. |+| 12 | GND | power_in | System (signal) ground. |+| 13 | VCC | power_out | Internal 3.1V LDO output (3.05-3.15V) used to bias internal blocks and as reference for VSET divider. Decouple with a ceramic cap to GND; do not load externally beyond bias needs. |+| 14 | VBAT | power_in | System supply and battery-voltage sense. Operating range 3.0-4.4V (low-battery cutoff 2.9-3.0V). Connects to the Li-ion cell positive terminal. |+| 15 | CSIN | input | Cell voltage Kelvin-sense input to the 14-bit ADC / fuel gauge. Route separately from the VBAT power trace to the battery + terminal for accurate voltage measurement. |+| 16 | LX | output | DC-DC switching node; connect to the external 1 uH inductor. Internal synchronous PMOS/NMOS (rDS(on) ~40/35 mOhm) switch at 500 kHz nominal (450-550 kHz) for both charge and boost modes. |+| 17 | GND | power_in | Exposed thermal pad / power ground. Must be soldered to the PCB ground plane for both heat dissipation and low-impedance return; connect to signal GND (pin 12) at the pad. |++## Key specifications++| Parameter | Value |+|---|---|+| Manufacturer | INJOINIC |+| Package | SOP-16 |+| Category | PMIC |+| Pins | 17 |++## Ordering variants++Same part, different packaging or reel option.++- `IP5506_BZ_188`+- `IP5506_BZ_LED`++## CAD (KiCad official)++- Symbol: `IP5506_BZ_188`+- Footprint: `Package_SO:SOIC-16_3.9x9.9mm_P1.27mm`+- 3D model: SOP-16 (KiCad packages3D, STEP)++## Provenance++Data extracted from the manufacturer datasheet, not a distributor listing:++- **Datasheet:** [INJOINIC datasheet](docs/ip5506-bz-188-datasheet.pdf) (18 pp, sha256 `8b74e81650e27e7d`, retrieved 2026-08-17, tier: lcsc)+- **Datasheet language:** Chinese. Pin names, descriptions, and specs on this page were extracted and translated to English by ds2sf; the linked PDF is the manufacturer original.+- **Extractor:** `ds2sf` (Claude). Every pin and dimension is cited to a datasheet page; it refuses to fabricate.+- **CAD:** KiCad official libraries (CC-BY-SA 4.0).++[Datasheet PDF](docs/ip5506-bz-188-datasheet.pdf)

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