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BQ24735RGRT
Public Made by Adomby adom
Texas Instruments Battery Management, VQFN-20(3.5x3.5). Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.
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README.mdadded+58@@ -0,0 +1,58 @@+# BQ24735RGRT++**Texas Instruments** · Battery Management · VQFN-20(3.5x3.5)++BQ24735RGRT from Texas Instruments, in a VQFN-20(3.5x3.5). 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 | ACN | input | Input current sense resistor negative input; place optional 0.1µF ceramic from ACN to GND for common-mode filtering and 0.1µF from ACN to ACP for differential filtering. |+| 2 | ACP | input | Input current sense resistor positive input; place 0.1µF ceramic from ACP to GND for common-mode filtering and 0.1µF from ACN to ACP for differential filtering. |+| 3 | CMSRC | passive | ACDRV charge pump source input; a 4kΩ resistor to the common source of ACFET (Q1) and RBFET (Q2) limits in-rush current on the pin. |+| 4 | ACDRV | output | Charge pump output driving ACFET and RBFET gates, 6V above CMSRC when ACDET is between 2.4V and 3.15V, VCC is above UVLO and VCC is 275mV above SRN; use a 4kΩ series resistor to the gates. |+| 5 | ACOK | output | AC adapter detection open-drain output, pulled high by an external 10kΩ pull-up when ACDET is between 2.4V and 3.15V, VCC is above UVLO and 275mV above SRN, otherwise pulled low by the internal MOSFET. |+| 6 | ACDET | input | Adapter detection input programmed by a resistor divider from the adapter input to GND; above 0.6V with VCC above UVLO enables the REGN LDO, ACOK comparator and IOUT. |+| 7 | IOUT | output | Buffered adapter or charge current output selectable by SMBus ChargeOption(), at 20 times the sense resistor differential voltage; use 100pF or less decoupling capacitor to GND. |+| 8 | SDA | bidirectional | SMBus open-drain data I/O connected to the host or smart battery data line with a 10kΩ pull-up. |+| 9 | SCL | input | SMBus open-drain clock input connected to the host or smart battery clock line with a 10kΩ pull-up. |+| 10 | ILIM | input | Charge current limit input set by a divider from the 3.3V rail; the lower of ILIM or DAC limit sets the regulation limit, above 1.6V disables ILIM control, below 75mV disables charge/discharge and above 105mV enables it. |+| 11 | BATDRV | output | Charge pump output driving the battery-to-system BATFET, 6V above SRN to turn it on and equal to SRN to turn it off; use a 4kΩ resistor to the gate. |+| 12 | SRN | input | Charge current sense resistor negative input and battery voltage sense; connect through a 7.5Ω resistor with 0.1µF to GND for filtering. |+| 13 | SRP | input | Charge current sense resistor positive input; connect through a 10Ω resistor to the sense resistor with 0.1µF differential filtering capacitor. |+| 14 | GND | power_in | IC ground; connect to the analog ground plane and only to the power ground plane through the PowerPAD underneath the IC. |+| 15 | LODRV | output | Low side power MOSFET driver output connected to the low side n-channel MOSFET gate. |+| 16 | REGN | power_out | 6V linear regulator output supplied from VCC, active when ACDET is above 0.6V and VCC is above UVLO; connect a 1µF ceramic capacitor to GND. |+| 17 | BTST | power_in | High side MOSFET driver power supply; connect a 0.047µF capacitor from BTST to PHASE and a bootstrap Schottky diode from REGN to BTST. |+| 18 | HIDRV | output | High side power MOSFET driver output connected to the high side n-channel MOSFET gate. |+| 19 | PHASE | passive | High side power MOSFET driver source, connected to the source of the high side n-channel MOSFET. |+| 20 | VCC | power_in | Input supply, diode-ORed from adapter or battery voltage; use a 10Ω resistor and 1µF capacitor to ground as a low pass filter to limit inrush current. |+| 21 | PowerPAD | power_in | Exposed pad beneath the IC joining analog and power ground at a single star point; always solder to the board with vias to the ground planes, also serves as thermal pad. |++## Key specifications++| Parameter | Value |+|---|---|+| Manufacturer | Texas Instruments |+| Package | VQFN-20(3.5x3.5) |+| Category | Power Management (PMIC) |+| Pins | 21 |++## CAD (KiCad official)++- Symbol: `BQ24735RGRT`+- Footprint: `Package_DFN_QFN:QFN-20-1EP_3.5x3.5mm_P0.5mm_EP2x2mm`+- 3D model: VQFN-20(3.5x3.5), generated from the KiCad footprint (body from the F.Fab outline, terminals on the pads, 0.9 mm nominal QFN height). Neither the vendor nor KiCad ships a 3D model for this package, so the dimensions are nominal, not the manufacturer's CAD (STEP)+- 3D model files: `bq24735rgrt-etched.step` / `bq24735rgrt-etched.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `bq24735rgrt.step` / `bq24735rgrt.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/bq24735) (45 pp, sha256 `49d4e7a43dd79779`, retrieved 2026-10-06, 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-4-5-20251001` (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/bq24735rgrt-datasheet.pdf)
page.jsonadded+238@@ -0,0 +1,238 @@+{+ "slug": "bq24735rgrt",+ "version": "0.1.0",+ "type": "component",+ "description": "Texas Instruments Battery Management, VQFN-20(3.5x3.5). Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.",+ "tags": [+ "component",+ "power management (pmic)",+ "bq24735rgrt",+ "factory-2.0.0",+ "extractor-text"+ ],+ "dependencies": {},+ "hero": {+ "type": "image",+ "path": "docs/hero.png"+ },+ "files": [+ "page.json",+ "README.md",+ "bq24735rgrt.kicad_sym",+ "bq24735rgrt.kicad_mod",+ "bq24735rgrt.glb",+ "bq24735rgrt.step",+ "bq24735rgrt.lbr",+ "docs/hero.png",+ "docs/bq24735rgrt-datasheet.pdf",+ "viewers/symbol.html",+ "viewers/footprint.html",+ "bq24735rgrt-hero.glb",+ "bq24735rgrt-hero.overlay.json"+ ],+ "component": {+ "mpn": "BQ24735RGRT",+ "manufacturer": "Texas Instruments",+ "package": "VQFN-20(3.5x3.5)",+ "pin_count": 21,+ "category": "Power Management (PMIC)",+ "subcategory": "Battery Management",+ "datasheet": "https://www.ti.com/cn/lit/gpn/bq24735",+ "parts": {+ "symbol": "bq24735rgrt.kicad_sym",+ "footprint": "bq24735rgrt.kicad_mod",+ "model_3d": "bq24735rgrt-hero.glb",+ "model_3d_plain": "bq24735rgrt.glb",+ "model_3d_step": "bq24735rgrt-etched.step",+ "model_3d_step_plain": "bq24735rgrt.step",+ "lbr": "bq24735rgrt.lbr"+ },+ "distributor_links": {+ "lcsc": 968583,+ "digikey": "296-29535-2-ND",+ "mouser": "595-BQ24735RGRT"+ },+ "distributor_check": {+ "checked_at": "2026-10-06T03:44:22Z",+ "source": "Component Ocean /api/assign-pns",+ "digikey": {+ "pn": "296-29535-2-ND",+ "status": "found",+ "lifecycle": "Active"+ },+ "mouser": {+ "pn": "595-BQ24735RGRT",+ "status": "found"+ }+ },+ "pins": [+ {+ "number": "1",+ "name": "ACN",+ "type": "input",+ "description": "Input current sense resistor negative input; place optional 0.1µF ceramic from ACN to GND for common-mode filtering and 0.1µF from ACN to ACP for differential filtering."+ },+ {+ "number": "2",+ "name": "ACP",+ "type": "input",+ "description": "Input current sense resistor positive input; place 0.1µF ceramic from ACP to GND for common-mode filtering and 0.1µF from ACN to ACP for differential filtering."+ },+ {+ "number": "3",+ "name": "CMSRC",+ "type": "passive",+ "description": "ACDRV charge pump source input; a 4kΩ resistor to the common source of ACFET (Q1) and RBFET (Q2) limits in-rush current on the pin."+ },+ {+ "number": "4",+ "name": "ACDRV",+ "type": "output",+ "description": "Charge pump output driving ACFET and RBFET gates, 6V above CMSRC when ACDET is between 2.4V and 3.15V, VCC is above UVLO and VCC is 275mV above SRN; use a 4kΩ series resistor to the gates."+ },+ {+ "number": "5",+ "name": "ACOK",+ "type": "output",+ "description": "AC adapter detection open-drain output, pulled high by an external 10kΩ pull-up when ACDET is between 2.4V and 3.15V, VCC is above UVLO and 275mV above SRN, otherwise pulled low by the internal MOSFET."+ },+ {+ "number": "6",+ "name": "ACDET",+ "type": "input",+ "description": "Adapter detection input programmed by a resistor divider from the adapter input to GND; above 0.6V with VCC above UVLO enables the REGN LDO, ACOK comparator and IOUT."+ },+ {+ "number": "7",+ "name": "IOUT",+ "type": "output",+ "description": "Buffered adapter or charge current output selectable by SMBus ChargeOption(), at 20 times the sense resistor differential voltage; use 100pF or less decoupling capacitor to GND."+ },+ {+ "number": "8",+ "name": "SDA",+ "type": "bidirectional",+ "description": "SMBus open-drain data I/O connected to the host or smart battery data line with a 10kΩ pull-up."+ },+ {+ "number": "9",+ "name": "SCL",+ "type": "input",+ "description": "SMBus open-drain clock input connected to the host or smart battery clock line with a 10kΩ pull-up."+ },+ {+ "number": "10",+ "name": "ILIM",+ "type": "input",+ "description": "Charge current limit input set by a divider from the 3.3V rail; the lower of ILIM or DAC limit sets the regulation limit, above 1.6V disables ILIM control, below 75mV disables charge/discharge and above 105mV enables it."+ },+ {+ "number": "11",+ "name": "BATDRV",+ "type": "output",+ "description": "Charge pump output driving the battery-to-system BATFET, 6V above SRN to turn it on and equal to SRN to turn it off; use a 4kΩ resistor to the gate."+ },+ {+ "number": "12",+ "name": "SRN",+ "type": "input",+ "description": "Charge current sense resistor negative input and battery voltage sense; connect through a 7.5Ω resistor with 0.1µF to GND for filtering."+ },+ {+ "number": "13",+ "name": "SRP",+ "type": "input",+ "description": "Charge current sense resistor positive input; connect through a 10Ω resistor to the sense resistor with 0.1µF differential filtering capacitor."+ },+ {+ "number": "14",+ "name": "GND",+ "type": "power_in",+ "description": "IC ground; connect to the analog ground plane and only to the power ground plane through the PowerPAD underneath the IC."+ },+ {+ "number": "15",+ "name": "LODRV",+ "type": "output",+ "description": "Low side power MOSFET driver output connected to the low side n-channel MOSFET gate."+ },+ {+ "number": "16",+ "name": "REGN",+ "type": "power_out",+ "description": "6V linear regulator output supplied from VCC, active when ACDET is above 0.6V and VCC is above UVLO; connect a 1µF ceramic capacitor to GND."+ },+ {+ "number": "17",+ "name": "BTST",+ "type": "power_in",+ "description": "High side MOSFET driver power supply; connect a 0.047µF capacitor from BTST to PHASE and a bootstrap Schottky diode from REGN to BTST."+ },+ {+ "number": "18",+ "name": "HIDRV",+ "type": "output",+ "description": "High side power MOSFET driver output connected to the high side n-channel MOSFET gate."+ },+ {+ "number": "19",+ "name": "PHASE",+ "type": "passive",+ "description": "High side power MOSFET driver source, connected to the source of the high side n-channel MOSFET."+ },+ {+ "number": "20",+ "name": "VCC",+ "type": "power_in",+ "description": "Input supply, diode-ORed from adapter or battery voltage; use a 10Ω resistor and 1µF capacitor to ground as a low pass filter to limit inrush current."+ },+ {+ "number": "21",+ "name": "PowerPAD",+ "type": "power_in",+ "description": "Exposed pad beneath the IC joining analog and power ground at a single star point; always solder to the board with vias to the ground planes, also serves as thermal pad."+ }+ ],+ "provenance": {+ "extractor": "extract_pins 0.3",+ "factory_chain": {+ "factory": "2.0.0",+ "extractor": "extract_pins 0.3",+ "primary_model": "claude-haiku-4-5-20251001",+ "primary_mode": "text",+ "consensus_model": "claude-sonnet-5-5",+ "consensus": "agreed",+ "guards": "pin_guards 0.1: passed",+ "guard_notes": [+ "exposed pad 21 added from the footprint"+ ],+ "pages_sent": 12,+ "cost_usd": 0.1556,+ "at": "2026-10-06T03:44:01"+ },+ "datasheet": {+ "url": "https://www.ti.com/cn/lit/gpn/bq24735",+ "pages": 45,+ "sha256": "49d4e7a43dd79779",+ "source_tier": "lcsc"+ },+ "cad": "KiCad official (CC-BY-SA 4.0)",+ "pins": {+ "total": 21,+ "described": 21,+ "cites_pages": true,+ "refuses_to_fabricate": true+ }+ },+ "viewers": {+ "symbol": "viewers/symbol.html",+ "footprint": "viewers/footprint.html"+ }+ },+ "visibility": "public",+ "org": "adom",+ "author": {+ "name": "Ray",+ "email": "[email protected]"+ }+}