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BQ7790503PWR
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Texas Instruments Battery Management, TSSOP-20. Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.
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README.mdadded+57@@ -0,0 +1,57 @@+# BQ7790503PWR++**Texas Instruments** · Battery Management · TSSOP-20++BQ7790503PWR from Texas Instruments, in a TSSOP-20. Pinout and pin descriptions extracted from the manufacturer datasheet (extract_pins, cross-checked by a second model); symbol, footprint, and 3D from KiCad-official CAD.++## Pinout++| Pin | Name | Type | Function |+|---|---|---|---|+| 1 | VDD | power_in | Supply voltage input, recommended 3 V to 25 V, with an absolute maximum input of 36 V. |+| 2 | AVDD | power_out | Analog supply output that should only be connected to a capacitor; its recommended range is 0 V to 3 V. |+| 3 | VC5 | input | Cell voltage sense input; the datasheet states VC5-VC4 must stay within 0 V to 5 V and that pin 3 must be connected to pin 4 only on the BQ77904. |+| 4 | VC4 | input | Cell voltage sense input with VC4-VC3 recommended between 0 V and 5 V. |+| 5 | VC3 | input | Cell voltage sense input with VC3-VC2 recommended between 0 V and 5 V. |+| 6 | VC2 | input | Cell voltage sense input with VC2-VC1 recommended between 0 V and 5 V. |+| 7 | VC1 | input | Cell voltage sense input with VC1 to VSS recommended between 0 V and 5 V. |+| 8 | AVSS | power_in | Analog ground pin for the device. |+| 9 | SRP | input | Current sense input connected to the battery side of the sense resistor, with recommended range -0.2 V to 0.8 V. |+| 10 | SRN | input | Current sense input connected to the PACK- side of the sense resistor, with recommended range -0.2 V to 0.8 V. |+| 11 | DSG | output | Discharge (DSG) FET driver output, rated 0 V to 16 V recommended and -0.3 V to 20 V absolute maximum with up to 1 mA output current. |+| 12 | CHGU | output | CHG signal output for the upper device of a stack, feeding the CHG signal to the CTRC pin of the lower device, rated 0 V to 16 V recommended with up to 1 mA output current. |+| 13 | CHG | output | Charge (CHG) FET driver output for a single device or the bottom device of a stack, rated 0 V to 16 V recommended with up to 1 mA output current. |+| 14 | LD | input | PACK- load removal detection input, rated 0 V to 16 V recommended and -30 V to 20 V absolute maximum. |+| 15 | TS | input | Thermistor measurement input, recommended 0 V to VTB; connect a 10-kΩ resistor to AVSS if the function is not used. |+| 16 | VTB | output | Thermistor bias output, recommended 0 V to 3 V with absolute maximum -0.3 V to 3.6 V. |+| 17 | CCFG | input | Cell series-configuration input, recommended 0 V to AVDD. |+| 18 | CTRC | input | CHG and DSG override input, recommended 0 V to (VDD + 5) V. |+| 19 | CTRD | input | CHG and DSG override input, recommended 0 V to (VDD + 5) V. |+| 20 | DVSS | power_in | Digital ground pin for the device. |++## Key specifications++| Parameter | Value |+|---|---|+| Manufacturer | Texas Instruments |+| Package | TSSOP-20 |+| Category | Power Management (PMIC) |+| Pins | 20 |++## CAD (KiCad official)++- Symbol: `BQ7790503PWR`+- Footprint: `Package_SO:TSSOP-20_4.4x6.5mm_P0.65mm`+- 3D model: TSSOP-20 (KiCad packages3D, STEP)+- 3D model files: `bq7790503pwr-etched.step` / `bq7790503pwr-etched.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `bq7790503pwr.step` / `bq7790503pwr.glb` are the bare package body.++## Provenance++Data extracted from the manufacturer datasheet, not a distributor listing:++- **Datasheet:** [Texas Instruments datasheet](https://www.ti.com/cn/lit/gpn/bq77905) (48 pp, sha256 `f04162b24e7e7c22`, retrieved 2026-10-08, 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:** parts-factory `2.0.0` / `extract_pins 0.3`, primary `claude-haiku-5-5` (text), consensus `claude-sonnet-5-5` (agreed), guards: pin_guards 0.1: passed. Pins are checked against the footprint pad set and their cited datasheet pages before publish.+- **CAD:** KiCad official libraries (CC-BY-SA 4.0).++[Datasheet PDF](docs/bq7790503pwr-datasheet.pdf)
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its recommended range is 0 V to 3 V."+ },+ {+ "number": "3",+ "name": "VC5",+ "type": "input",+ "description": "Cell voltage sense input; the datasheet states VC5-VC4 must stay within 0 V to 5 V and that pin 3 must be connected to pin 4 only on the BQ77904."+ },+ {+ "number": "4",+ "name": "VC4",+ "type": "input",+ "description": "Cell voltage sense input with VC4-VC3 recommended between 0 V and 5 V."+ },+ {+ "number": "5",+ "name": "VC3",+ "type": "input",+ "description": "Cell voltage sense input with VC3-VC2 recommended between 0 V and 5 V."+ },+ {+ "number": "6",+ "name": "VC2",+ "type": "input",+ "description": "Cell voltage sense input with VC2-VC1 recommended between 0 V and 5 V."+ },+ {+ "number": "7",+ "name": "VC1",+ "type": "input",+ "description": "Cell voltage sense input with VC1 to VSS recommended between 0 V and 5 V."+ },+ {+ "number": "8",+ "name": "AVSS",+ "type": "power_in",+ "description": "Analog ground pin for the device."+ },+ {+ "number": "9",+ "name": "SRP",+ "type": "input",+ "description": "Current sense input connected to the battery side of the sense resistor, with recommended range -0.2 V to 0.8 V."+ },+ {+ "number": "10",+ "name": "SRN",+ "type": "input",+ "description": "Current sense input connected to the PACK- side of the sense resistor, with recommended range -0.2 V to 0.8 V."+ },+ {+ "number": "11",+ "name": "DSG",+ "type": "output",+ "description": "Discharge (DSG) FET driver output, rated 0 V to 16 V recommended and -0.3 V to 20 V absolute maximum with up to 1 mA output current."+ },+ {+ "number": "12",+ "name": "CHGU",+ "type": "output",+ "description": "CHG signal output for the upper device of a stack, feeding the CHG signal to the CTRC pin of the lower device, rated 0 V to 16 V recommended with up to 1 mA output current."+ },+ {+ "number": "13",+ "name": "CHG",+ "type": "output",+ "description": "Charge (CHG) FET driver output for a single device or the bottom device of a stack, rated 0 V to 16 V recommended with up to 1 mA output current."+ },+ {+ "number": "14",+ "name": "LD",+ "type": "input",+ "description": "PACK- load removal detection input, rated 0 V to 16 V recommended and -30 V to 20 V absolute maximum."+ },+ {+ "number": "15",+ "name": "TS",+ "type": "input",+ "description": "Thermistor measurement input, recommended 0 V to VTB; connect a 10-kΩ resistor to AVSS if the function is not used."+ },+ {+ "number": "16",+ "name": "VTB",+ "type": "output",+ "description": "Thermistor bias output, recommended 0 V to 3 V with absolute maximum -0.3 V to 3.6 V."+ },+ {+ "number": "17",+ "name": "CCFG",+ "type": "input",+ "description": "Cell series-configuration input, recommended 0 V to AVDD."+ },+ {+ "number": "18",+ "name": "CTRC",+ "type": "input",+ "description": "CHG and DSG override input, recommended 0 V to (VDD + 5) V."+ },+ {+ "number": "19",+ "name": "CTRD",+ "type": "input",+ "description": "CHG and DSG override input, recommended 0 V to (VDD + 5) V."+ },+ {+ "number": "20",+ "name": "DVSS",+ "type": "power_in",+ "description": "Digital ground pin for the device."+ }+ ],+ "provenance": {+ "extractor": "extract_pins 0.3",+ "factory_chain": {+ "factory": "2.0.0",+ "extractor": "extract_pins 0.3",+ "primary_model": "claude-haiku-5-5",+ "primary_mode": "text",+ "consensus_model": "claude-sonnet-5-5",+ "consensus": "agreed",+ "guards": "pin_guards 0.1: passed",+ "guard_notes": [+ "extractor flagged: Pin 2 AVDD is listed as type 'O' (output) in the datasheet pin table; mapped to KiCad power_out beca; The datasheet pin table says pin 3 (VC5) must be connected to pin 4 (VC4) only on the BQ77904. This ; The absolute maximum table lists CCFG under both the 36 V and the -0.3 to 3.6 V input groups. The re"+ ],+ "pages_sent": 11,+ "cost_usd": 0.0862,+ "at": "2026-10-08T20:20:34"+ },+ "datasheet": {+ "url": "https://www.ti.com/cn/lit/gpn/bq77905",+ "pages": 48,+ "sha256": "f04162b24e7e7c22",+ "source_tier": "lcsc"+ },+ "cad": "KiCad official (CC-BY-SA 4.0)",+ "pins": {+ "total": 20,+ "described": 20,+ "cites_pages": true,+ "refuses_to_fabricate": true+ }+ },+ "viewers": {+ "symbol": "viewers/symbol.html",+ "footprint": "viewers/footprint.html"+ },+ "models_3d": [+ {+ "file": "bq7790503pwr.step",+ "role": "plain",+ "up": "Z",+ "units": "mm",+ "origin": "footprint origin = pad-pattern centre",+ "seat": "z = 0",+ "extents_mm": [+ 6.4,+ 6.5,+ 1.2+ ],+ "zmin_mm": 0,+ "centre_offset_mm": 0,+ "footprint_binding": "identity",+ "sha256": "97339947f3a7196470ec2f1d9f9b92bb2fc2ab66ad53be0cf105192585ef3c9a",+ "checked": "2026-10-08",+ "checked_by": "factory/step_pose.py (Z-up, origin, seat, binding)"+ },+ {+ "file": "bq7790503pwr-etched.step",+ "role": "eda",+ "up": "Z",+ "units": "mm",+ "origin": "footprint origin = pad-pattern centre",+ "seat": "z = 0",+ "extents_mm": [+ 6.4,+ 6.5,+ 1.2+ ],+ "zmin_mm": 0,+ "centre_offset_mm": 0,+ "footprint_binding": "identity",+ "sha256": "d95b1a267fcebafacc0402a7ae88ae100a92ffadbf2b4b913ca22609aeaf85f0",+ "checked": "2026-10-08",+ "checked_by": "factory/step_pose.py (Z-up, origin, seat, binding)"+ }+ ]+ },+ "visibility": "public",+ "org": "adom",+ "author": {+ "name": "Ray",+ "email": "[email protected]"+ }+}