component
BQ24735RGRR
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 @@+# BQ24735RGRR++**Texas Instruments** · Battery Management · VQFN-20(3.5x3.5)++BQ24735RGRR 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 an optional 0.1µF ceramic capacitor from ACN to GND for common-mode filtering and a 0.1µF ceramic capacitor from ACN to ACP for differential-mode filtering; common-mode range 4.5V to 24V. |+| 2 | ACP | input | Input current sense resistor positive input; place a 0.1µF ceramic capacitor from ACP to GND for common-mode filtering and a 0.1µF ceramic capacitor from ACN to ACP for differential-mode filtering; common-mode range 4.5V to 24V. |+| 3 | CMSRC | input | ACDRV charge pump source input; connect to the common source of ACFET (Q1) and RBFET (Q2) through a 4kΩ series resistor to limit in-rush current; sets the reference for the 6V ACDRV gate overdrive. |+| 4 | ACDRV | output | Charge pump output driving the adapter NMOS selector (ACFET) and reverse-blocking NMOS (RBFET); outputs VCMSRC + 6V when ACDET is 2.4V-3.15V and VCC is above UVLO; place a 4kΩ series resistor to limit in-rush current; minimum load resistance 500kΩ, turn-off resistance 5kΩ-7.4kΩ. |+| 5 | ACOK | tri_state | AC adapter detection open-drain output; pulled HIGH by external pull-up when ACDET is 2.4V-3.15V, VCC > UVLO, and VCC is ≥275mV above SRN; pulled LOW internally otherwise; ACOK rising deglitch 150ms (first insertion) or 1.3s (default subsequent); output saturation voltage ≤500mV at 5mA. |+| 6 | ACDET | input | Adapter detection analog input; program the valid adapter threshold with an external resistor divider from adapter input to GND; ACOK rising threshold 2.4V, ACOVP threshold 3.15V; when above 0.6V and VCC > UVLO, REGN LDO, ACOK comparator, and IOUT become active. |+| 7 | IOUT | output | Buffered current sense amplifier output selectable between adapter current (ACP-ACN) or charge current (SRP-SRN) via SMBus ChargeOption() bit[5]; output equals 20× the differential sense voltage; output range 0V-3.3V, max output current 1mA, max load capacitance 100pF. |+| 8 | SDA | bidirectional | SMBus open-drain data I/O; connect to SMBus data line with a 10kΩ pull-up resistor; input low threshold 0.8V, input high threshold 2.1V; output saturation voltage ≤500mV at 5mA; supports 10kHz-100kHz clock. |+| 9 | SCL | input | SMBus open-drain clock input; connect to SMBus clock line with a 10kΩ pull-up resistor; input low threshold 0.8V, input high threshold 2.1V; supports 10kHz-100kHz clock frequency. |+| 10 | ILIM | input | Charge current limit analog input; program with a resistor divider from 3.3V rail to GND; the lower of ILIM or the charge current DAC sets the regulation limit; charge disabled when VILIM < 75mV (CE falling threshold), charge enabled when VILIM > 105mV (CE rising threshold); to disable ILIM control pull above 1.6V. |+| 11 | BATDRV | output | Charge pump output driving the battery-to-system NMOS (BATFET); outputs VSRN + 6V to turn on BATFET and VSRN to turn off BATFET; charge pump current limit 40µA-60µA; place a 4kΩ series resistor to limit in-rush current; minimum load resistance 500kΩ. |+| 12 | SRN | input | Charge current sense resistor negative input and battery voltage sense; connect through a 7.5Ω series resistor then to GND via 0.1µF for common-mode filtering and across sense resistor via 0.1µF for differential filtering; output common-mode range 0V-19.2V. |+| 13 | SRP | input | Charge current sense resistor positive input; connect through a 10Ω series resistor to the sense resistor; place a 0.1µF capacitor between SRP and SRN for differential filtering; SRP capacitance must not exceed 0.1µF for correct cycle-by-cycle OCP detection. |+| 14 | GND | power_in | IC analog ground; on PCB connect to analog ground plane and connect to power ground plane only through the exposed PowerPad beneath the IC. |+| 15 | LODRV | output | Low-side synchronous power MOSFET gate driver output; connect to low-side n-channel MOSFET gate; turn-on resistance 7.5Ω typ / 12Ω max at VREGN = 6V, 10mA; turn-off resistance 0.9Ω typ / 1.4Ω max; dead time from high side to low side 20ns. |+| 16 | REGN | power_out | Internal 6V linear regulator output supplied from VCC; regulates to 5.5V-6.5V when VCC > 6.5V and ACDET > 0.6V; current limit 50mA typ (75mA max) during charge; connect a 1µF ceramic capacitor to GND for stability. |+| 17 | BTST | passive | High-side MOSFET gate driver bootstrap supply; connect a 0.047µF ceramic capacitor from BTST to PHASE and an external Schottky bootstrap diode from REGN to BTST; a low-side refresh pulse is triggered when VBTST-VPHASE falls below 4.3V typ. |+| 18 | HIDRV | output | High-side synchronous power MOSFET gate driver output; connect to high-side n-channel MOSFET gate; turn-on resistance 6Ω typ / 10Ω max at VBTST-VPHASE = 5.5V, 10mA; turn-off resistance 0.65Ω typ / 1.3Ω max; dead time from low side to high side 20ns. |+| 19 | PHASE | passive | High-side MOSFET driver source and PWM switching node; connect to the source of the high-side n-channel MOSFET; voltage range −2V to 24V (recommended operating); low-side short-circuit protection monitored between PHASE and GND. |+| 20 | VCC | power_in | Input supply pin; diode-OR connection from AC adapter or battery; operating range 4.5V to 24V; UVLO rising threshold 3.5V-4V, falling hysteresis 340mV; use a 10Ω resistor and 1µF capacitor to GND as a low-pass filter to limit inrush current. |+| 21 | PowerPAD | power_in | Exposed thermal and ground pad beneath the IC; analog ground and power ground are star-connected at this pad; must always be soldered to the PCB with thermal vias to analog and power ground planes; θJCbot = 4.4°C/W. |++## Key specifications++| Parameter | Value |+|---|---|+| Manufacturer | Texas Instruments |+| Package | VQFN-20(3.5x3.5) |+| Category | Power Management (PMIC) |+| Pins | 21 |++## CAD (KiCad official)++- Symbol: `BQ24735RGRR`+- 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: `bq24735rgrr-etched.step` / `bq24735rgrr-etched.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `bq24735rgrr.step` / `bq24735rgrr.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 2026-10-01, 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 0.2`, primary `claude-haiku-4-5-20251001` (text), consensus `claude-sonnet-4-6` (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/bq24735rgrr-datasheet.pdf)
page.jsonadded+236@@ -0,0 +1,236 @@+{+ "slug": "bq24735rgrr",+ "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)",+ "bq24735rgrr",+ "factory-2.0.0",+ "extractor-text"+ ],+ "dependencies": {},+ "hero": {+ "type": "image",+ "path": "docs/hero.png"+ },+ "files": [+ "page.json",+ "README.md",+ "bq24735rgrr.kicad_sym",+ "bq24735rgrr.kicad_mod",+ "bq24735rgrr.glb",+ "bq24735rgrr.step",+ "bq24735rgrr.lbr",+ "docs/hero.png",+ "docs/bq24735rgrr-datasheet.pdf",+ "viewers/symbol.html",+ "viewers/footprint.html"+ ],+ "component": {+ "mpn": "BQ24735RGRR",+ "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": "bq24735rgrr.kicad_sym",+ "footprint": "bq24735rgrr.kicad_mod",+ "model_3d": "bq24735rgrr-etched.glb",+ "model_3d_plain": "bq24735rgrr.glb",+ "model_3d_step": "bq24735rgrr-etched.step",+ "model_3d_step_plain": "bq24735rgrr.step",+ "lbr": "bq24735rgrr.lbr"+ },+ "distributor_links": {+ "lcsc": "C353879",+ "digikey": "296-47742-2-ND",+ "mouser": "595-BQ24735RGRR"+ },+ "distributor_check": {+ "checked_at": "2026-10-01T18:03:47Z",+ "source": "Component Ocean /api/assign-pns",+ "digikey": {+ "pn": "296-47742-2-ND",+ "status": "found",+ "lifecycle": "Active"+ },+ "mouser": {+ "pn": "595-BQ24735RGRR",+ "status": "found"+ }+ },+ "pins": [+ {+ "number": "1",+ "name": "ACN",+ "type": "input",+ "description": "Input current sense resistor negative input; place an optional 0.1µF ceramic capacitor from ACN to GND for common-mode filtering and a 0.1µF ceramic capacitor from ACN to ACP for differential-mode filtering; common-mode range 4.5V to 24V."+ },+ {+ "number": "2",+ "name": "ACP",+ "type": "input",+ "description": "Input current sense resistor positive input; place a 0.1µF ceramic capacitor from ACP to GND for common-mode filtering and a 0.1µF ceramic capacitor from ACN to ACP for differential-mode filtering; common-mode range 4.5V to 24V."+ },+ {+ "number": "3",+ "name": "CMSRC",+ "type": "input",+ "description": "ACDRV charge pump source input; connect to the common source of ACFET (Q1) and RBFET (Q2) through a 4kΩ series resistor to limit in-rush current; sets the reference for the 6V ACDRV gate overdrive."+ },+ {+ "number": "4",+ "name": "ACDRV",+ "type": "output",+ "description": "Charge pump output driving the adapter NMOS selector (ACFET) and reverse-blocking NMOS (RBFET); outputs VCMSRC + 6V when ACDET is 2.4V-3.15V and VCC is above UVLO; place a 4kΩ series resistor to limit in-rush current; minimum load resistance 500kΩ, turn-off resistance 5kΩ-7.4kΩ."+ },+ {+ "number": "5",+ "name": "ACOK",+ "type": "tri_state",+ "description": "AC adapter detection open-drain output; pulled HIGH by external pull-up when ACDET is 2.4V-3.15V, VCC > UVLO, and VCC is ≥275mV above SRN; pulled LOW internally otherwise; ACOK rising deglitch 150ms (first insertion) or 1.3s (default subsequent); output saturation voltage ≤500mV at 5mA."+ },+ {+ "number": "6",+ "name": "ACDET",+ "type": "input",+ "description": "Adapter detection analog input; program the valid adapter threshold with an external resistor divider from adapter input to GND; ACOK rising threshold 2.4V, ACOVP threshold 3.15V; when above 0.6V and VCC > UVLO, REGN LDO, ACOK comparator, and IOUT become active."+ },+ {+ "number": "7",+ "name": "IOUT",+ "type": "output",+ "description": "Buffered current sense amplifier output selectable between adapter current (ACP-ACN) or charge current (SRP-SRN) via SMBus ChargeOption() bit[5]; output equals 20× the differential sense voltage; output range 0V-3.3V, max output current 1mA, max load capacitance 100pF."+ },+ {+ "number": "8",+ "name": "SDA",+ "type": "bidirectional",+ "description": "SMBus open-drain data I/O; connect to SMBus data line with a 10kΩ pull-up resistor; input low threshold 0.8V, input high threshold 2.1V; output saturation voltage ≤500mV at 5mA; supports 10kHz-100kHz clock."+ },+ {+ "number": "9",+ "name": "SCL",+ "type": "input",+ "description": "SMBus open-drain clock input; connect to SMBus clock line with a 10kΩ pull-up resistor; input low threshold 0.8V, input high threshold 2.1V; supports 10kHz-100kHz clock frequency."+ },+ {+ "number": "10",+ "name": "ILIM",+ "type": "input",+ "description": "Charge current limit analog input; program with a resistor divider from 3.3V rail to GND; the lower of ILIM or the charge current DAC sets the regulation limit; charge disabled when VILIM < 75mV (CE falling threshold), charge enabled when VILIM > 105mV (CE rising threshold); to disable ILIM control pull above 1.6V."+ },+ {+ "number": "11",+ "name": "BATDRV",+ "type": "output",+ "description": "Charge pump output driving the battery-to-system NMOS (BATFET); outputs VSRN + 6V to turn on BATFET and VSRN to turn off BATFET; charge pump current limit 40µA-60µA; place a 4kΩ series resistor to limit in-rush current; minimum load resistance 500kΩ."+ },+ {+ "number": "12",+ "name": "SRN",+ "type": "input",+ "description": "Charge current sense resistor negative input and battery voltage sense; connect through a 7.5Ω series resistor then to GND via 0.1µF for common-mode filtering and across sense resistor via 0.1µF for differential filtering; output common-mode range 0V-19.2V."+ },+ {+ "number": "13",+ "name": "SRP",+ "type": "input",+ "description": "Charge current sense resistor positive input; connect through a 10Ω series resistor to the sense resistor; place a 0.1µF capacitor between SRP and SRN for differential filtering; SRP capacitance must not exceed 0.1µF for correct cycle-by-cycle OCP detection."+ },+ {+ "number": "14",+ "name": "GND",+ "type": "power_in",+ "description": "IC analog ground; on PCB connect to analog ground plane and connect to power ground plane only through the exposed PowerPad beneath the IC."+ },+ {+ "number": "15",+ "name": "LODRV",+ "type": "output",+ "description": "Low-side synchronous power MOSFET gate driver output; connect to low-side n-channel MOSFET gate; turn-on resistance 7.5Ω typ / 12Ω max at VREGN = 6V, 10mA; turn-off resistance 0.9Ω typ / 1.4Ω max; dead time from high side to low side 20ns."+ },+ {+ "number": "16",+ "name": "REGN",+ "type": "power_out",+ "description": "Internal 6V linear regulator output supplied from VCC; regulates to 5.5V-6.5V when VCC > 6.5V and ACDET > 0.6V; current limit 50mA typ (75mA max) during charge; connect a 1µF ceramic capacitor to GND for stability."+ },+ {+ "number": "17",+ "name": "BTST",+ "type": "passive",+ "description": "High-side MOSFET gate driver bootstrap supply; connect a 0.047µF ceramic capacitor from BTST to PHASE and an external Schottky bootstrap diode from REGN to BTST; a low-side refresh pulse is triggered when VBTST-VPHASE falls below 4.3V typ."+ },+ {+ "number": "18",+ "name": "HIDRV",+ "type": "output",+ "description": "High-side synchronous power MOSFET gate driver output; connect to high-side n-channel MOSFET gate; turn-on resistance 6Ω typ / 10Ω max at VBTST-VPHASE = 5.5V, 10mA; turn-off resistance 0.65Ω typ / 1.3Ω max; dead time from low side to high side 20ns."+ },+ {+ "number": "19",+ "name": "PHASE",+ "type": "passive",+ "description": "High-side MOSFET driver source and PWM switching node; connect to the source of the high-side n-channel MOSFET; voltage range −2V to 24V (recommended operating); low-side short-circuit protection monitored between PHASE and GND."+ },+ {+ "number": "20",+ "name": "VCC",+ "type": "power_in",+ "description": "Input supply pin; diode-OR connection from AC adapter or battery; operating range 4.5V to 24V; UVLO rising threshold 3.5V-4V, falling hysteresis 340mV; use a 10Ω resistor and 1µF capacitor to GND as a low-pass filter to limit inrush current."+ },+ {+ "number": "21",+ "name": "PowerPAD",+ "type": "power_in",+ "description": "Exposed thermal and ground pad beneath the IC; analog ground and power ground are star-connected at this pad; must always be soldered to the PCB with thermal vias to analog and power ground planes; θJCbot = 4.4°C/W."+ }+ ],+ "provenance": {+ "extractor": "extract_pins 0.2",+ "factory_chain": {+ "factory": "2.0.0",+ "extractor": "extract_pins 0.2",+ "primary_model": "claude-haiku-4-5-20251001",+ "primary_mode": "text",+ "consensus_model": "claude-sonnet-4-6",+ "consensus": "agreed",+ "guards": "pin_guards 0.1: passed",+ "guard_notes": [+ "1/21 pins cited to the wrong page (name found elsewhere): ['21:PowerPAD@p14']"+ ],+ "pages_sent": 45,+ "cost_usd": 0.5067,+ "at": "2026-10-01T18:03:22"+ },+ "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]"+ }+}