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RT8511BGQW
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Richtek Tech LED Drivers, DFN-8-EP(2x2). Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.
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README.md+85docs/hero.pngdocs/rt8511bgqw-datasheet.pdf+973package.json+198page.json+204rt8511bgqw-etched.glbrt8511bgqw-hero.glbrt8511bgqw-hero.overlay.json+282rt8511bgqw.glbrt8511bgqw.kicad_mod+295rt8511bgqw.kicad_sym+49rt8511bgqw.lbr+129rt8511bgqw.step+2490viewers/footprint.html+1viewers/symbol.html+1README.mdadded+85@@ -0,0 +1,85 @@+# RT8511BGQW++**Richtek Tech** · LED Drivers · DFN-8-EP(2x2)++RT8511BGQW from Richtek Tech, in a DFN-8-EP(2x2). 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 | OVP | input | Over-voltage protection sense input for the boost converter with a detecting threshold of 1.2V (1.14V to 1.26V). |+| 2 | FB | input | Feedback pin regulated to 200mV typ.; connect a resistor between this pin and GND to set the LED current. |+| 3 | DIMC | passive | PWM filter pin that filters the PWM signal to a DC voltage using an external capacitor (1µF typical). |+| 4 | GND | power_in | Ground. |+| 5 | LX | passive | Switch node of the boost converter, internal N-MOSFET rated -0.3V to 48V with 2.2A typ. current limit. |+| 6 | VIN | power_in | Power supply input, operating range 2.7V to 24V (absolute maximum 26.5V). |+| 7 | PWM | input | Dimming control input accepting a 100Hz to 8kHz PWM signal, logic high 1.6V min and logic low 0.8V max. |+| 8 | EN | input | Active-high chip enable for the boost converter, logic high 1.6V min and logic low 0.8V max. |+| 9 | GND | power_in | Exposed pad, must be soldered to a large PCB and connected to AGND for maximum power dissipation. |++## Key specifications++| Parameter | Value |+|---|---|+| Manufacturer | Richtek Tech |+| Package | DFN-8-EP(2x2) |+| Category | Display Modules / LED Drivers / Display Drivers |+| Pins | 9 |++## Electrical characteristics++Limits as printed in the datasheet (page.json `metadata.characteristics` carries them as data).++| Parameter | Symbol | Min | Typ | Max | Unit | Conditions | Page |+|---|---|---|---|---|---|---|---|+| VIN Shutdown Current | ISHDN | | 1 | 4 | µA | VIN = 4.5V, VEN = 0V | 4 |+| EN, PWM Logic-High Threshold Voltage | VIH | 1.6 | | | V | VIN = 2.7V to 24V | 4 |+| EN, PWM Logic-Low Threshold Voltage | VIL | | | 0.8 | V | VIN = 2.7V to 24V | 4 |+| EN Sink Current | IIH | 1 | | 10 | µA | VEN = 3V | 4 |+| Shutdown Delay | tSHDN | 52 | 64 | 80 | ms | EN high to low | 4 |+| PWM Dimming Frequency | | 0.1 | | 8 | kHz | | 4 |+| Switching Frequency | fOSC | 0.4 | 0.5 | 0.6 | MHz | VIN = 2.7V to 24V | 4 |+| LX On Resistance (N-MOSFET) | RDS(ON) | | 0.4 | 0.6 | Ω | VIN > 5V | 4 |+| Minimum Duty Cycle for PWM Dimming | DMIN | 1 | | | % | Dimming Freq. = 100Hz to 8kHz | 5 |+| Feedback Voltage | VFB | 195 | 200 | 205 | mV | | 5 |+| LX Current Limit | ILIM | 1.66 | 2.2 | 2.74 | A | | 5 |+| Over Voltage Protection Threshold | VOVP | 1.14 | 1.2 | 1.26 | V | | 5 |+| VIN Quiescent Current (switching) | IQ_SW | | | 2.2 | mA | VFB = 0V, Switching | 4 |+| VIN Quiescent Current | IQ | | 725 | | µA | VFB = 1.5V, No Switching | 4 |+| Minimum ON Time | | | 60 | | ns | | 4 |+| Maximum Duty Cycle | DMAX | | 92 | | % | VFB = 0V, Switching | 4 |+| Thermal Shutdown Temperature | TSD | | 160 | | °C | | 5 |+| Thermal Shutdown Hysteresis | TSD | | 30 | | °C | | 5 |+| Supply Input Voltage | VIN | 2.7 | | 24 | V | | 4 |+| Junction Temperature Range | TJ | -40 | | 125 | °C | | 4 |+| Ambient Temperature Range | TA | -40 | | 85 | °C | | 4 |+| VIN, EN, PWM, DIMC to GND | | -0.3 | | 26.5 | V | | 4 |+| FB, OVP to GND | | -0.3 | | 48 | V | | 4 |+| LX to GND | | -0.3 | | 48 | V | | 4 |+| LX to GND (< 500ns) | | -1 | | 48 | V | < 500ns | 4 |+| Power Dissipation | PD | | | 0.833 | W | TA = 25°C, WDFN-8L 2x2 | 4 |+| Lead Temperature | | | | 260 | °C | Soldering, 10 sec. | 4 |+| Junction Temperature | TJ | | | 150 | °C | | 4 |+| Storage Temperature Range | | -65 | | 150 | °C | | 4 |+| ESD HBM | | | | 2 | kV | Human Body Model | 4 |+| ESD MM | | | | 200 | V | Machine Model | 4 |+| Thermal Resistance Junction to Ambient | θJA | | 120 | | °C/W | WDFN-8L 2x2, JEDEC 51-7 four-layer board, TA = 25°C | 4 |+| Thermal Resistance Junction to Case | θJC | | 8.2 | | °C/W | WDFN-8L 2x2, measured at exposed pad | 4 |++## CAD (KiCad official)++- Symbol: `RT8511BGQW`+- Footprint: `Package_DFN_QFN:DFN-8-1EP_2x2mm_P0.5mm_EP0.6x1.2mm`+- 3D model: DFN-8-EP(2x2) (KiCad packages3D, STEP)+- 3D model files: `rt8511bgqw-etched.step` / `rt8511bgqw-etched.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `rt8511bgqw.step` / `rt8511bgqw.glb` are the bare package body.++## Provenance++Data extracted from the manufacturer datasheet, not a distributor listing:++- **Datasheet:** [Richtek Tech datasheet](docs/rt8511bgqw-datasheet.pdf) (11 pp, sha256 `029c4557cdff90a7`, retrieved 2026-10-22, tier: manufacturer)+- **Extractor:** parts-factory `2.0.0` / `extract_pins 0.3`, primary `claude-sonnet-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/rt8511bgqw-datasheet.pdf)
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docs/rt8511bgqw-datasheet.pdfadded+973@@ -0,0 +1,973 @@+%PDF-1.5+%����+1 0 obj+<</Author()/CreationDate(D:20150217154034+08'00')/Creator(PageMaker 7.0)/ModDate(D:20181004162649+08'00')/Producer(Acrobat Distiller 10.1.12 \(Windows\); modified using iText� 5.5.11 �2000-2017 iText Group NV \(AGPL-version\))/Title(43V Asynchronous Boost WLED Driver)/Keywords(UMPC and Notebook Computer Backlight,UMPC and Notebook Computer Backlight,GPS,Portable DVD Backlight,Wide Input Voltage Range : 2.7V to 24V,Wide Input Voltage Range : 2.7V to 24V,High Output Voltage : up to 43V,Direct PWM Dimming Control and Frequency from 100Hz to 8kHz,Internal Soft-Start and Compensation,200mV Reference Voltage,PWM Dimming with Internal Filter,Programmable Over Voltage Protection,Over Temperature Protection,Current Limit Protection,Thin 8-Lead WDFN Package,RoHS Compliant and Halogen Free)/Subject(The RT8511B is an LED driver IC that can support up to 10 WLED in series. It is ,composed of a current mode boost converter integrated with a 43V/2.2A power ,switch running at a fixed 500kHz frequency and covering a wide VIN range from ,2.7V to 24V.The white LED current is set with an external resistor, and the ,feedback voltage is regulated to 200mV \(typ.\). During operation, the LED ,current can be controlled by the PWM input signal in which the duty cycle ,determines the feedback reference voltage.,,For brightness dimming, the RT8511B is able to maintain steady control of the ,LED current. Therefore, no audible noises are generated on the output ,capacitor. The RT8511B also has programmable over voltage pin to prevent the ,output from exceeding absolute maximum ratings during open LED conditions. The ,RT8511B is available in WDFN-8L 2x2 package.,,)>>+endobj+2 0 obj+<</Length 5598/Type/Metadata/Subtype/XML>>stream+<?xpacket begin="" id="W5M0MpCehiHzreSzNTczkc9d"?>+<x:xmpmeta xmlns:x="adobe:ns:meta/" x:xmptk="Adobe XMP Core 5.1.0-jc003">+ <rdf:RDF xmlns:rdf="http://www.w3.org/1999/02/22-rdf-syntax-ns#">+ <rdf:Description rdf:about=""+ xmlns:dc="http://purl.org/dc/elements/1.1/"+ xmlns:pdf="http://ns.adobe.com/pdf/1.3/"+ xmlns:xmp="http://ns.adobe.com/xap/1.0/"+ dc:format="application/pdf"+ pdf:Keywords="UMPC and Notebook Computer Backlight,UMPC and Notebook Computer Backlight,GPS,Portable DVD Backlight,Wide Input Voltage Range : 2.7V to 24V,Wide Input Voltage Range : 2.7V to 24V,High Output Voltage : up to 43V,Direct PWM Dimming Control and Frequency from 100Hz to 8kHz,Internal Soft-Start and Compensation,200mV Reference Voltage,PWM Dimming with Internal Filter,Programmable Over Voltage Protection,Over Temperature Protection,Current Limit Protection,Thin 8-Lead WDFN Package,RoHS Compliant and Halogen Free"+ pdf:Producer="Acrobat Distiller 10.1.12 (Windows); modified using iText® 5.5.11 ©2000-2017 iText Group NV (AGPL-version)"+ xmp:CreateDate="2015-02-17T15:40:34+08:00"+ xmp:CreatorTool="PageMaker 7.0"+ xmp:ModifyDate="2018-10-04T16:26:49+08:00"+ xmp:MetadataDate="2018-10-04T16:26:49+08:00">+ <dc:subject>+ <rdf:Bag>+ <rdf:li>UMPC and Notebook Computer Backlight</rdf:li>+ <rdf:li>UMPC and Notebook Computer Backlight</rdf:li>+ <rdf:li>GPS</rdf:li>+ <rdf:li>Portable DVD Backlight</rdf:li>+ <rdf:li>Wide Input Voltage Range : 2.7V to 24V</rdf:li>+ <rdf:li>Wide Input Voltage Range : 2.7V to 24V</rdf:li>+ <rdf:li>High Output Voltage : up to 43V</rdf:li>+ <rdf:li>Direct PWM Dimming Control and Frequency from 100Hz to 8kHz</rdf:li>+ <rdf:li>Internal Soft-Start and Compensation</rdf:li>+ <rdf:li>200mV Reference Voltage</rdf:li>+ <rdf:li>PWM Dimming with Internal Filter</rdf:li>+ <rdf:li>Programmable Over Voltage Protection</rdf:li>+ <rdf:li>Over Temperature Protection</rdf:li>+ <rdf:li>Current Limit Protection</rdf:li>+ <rdf:li>Thin 8-Lead WDFN Package</rdf:li>+ <rdf:li>RoHS Compliant and Halogen Free</rdf:li>+ </rdf:Bag>+ </dc:subject>+ <dc:creator>+ <rdf:Seq>+ <rdf:li/>+ </rdf:Seq>+ </dc:creator>+ <dc:title>+ <rdf:Alt>+ <rdf:li xml:lang="x-default">43V Asynchronous Boost WLED Driver</rdf:li>+ </rdf:Alt>+ </dc:title>+ <dc:description>+ <rdf:Alt>+ <rdf:li xml:lang="x-default">The RT8511B is an LED driver IC that can support up to 10 WLED in series. It is ,composed of a current mode boost converter integrated with a 43V/2.2A power ,switch running at a fixed 500kHz frequency and covering a wide VIN range from ,2.7V to 24V.The white LED current is set with an external resistor, and the ,feedback voltage is regulated to 200mV (typ.). During operation, the LED ,current can be controlled by the PWM input signal in which the duty cycle ,determines the feedback reference voltage.,,For brightness dimming, the RT8511B is able to maintain steady control of the ,LED current. Therefore, no audible noises are generated on the output ,capacitor. The RT8511B also has programmable over voltage pin to prevent the ,output from exceeding absolute maximum ratings during open LED conditions. 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