SGD5020 - Wireless Charging Transmitter IC | SOP-8 | Sigma
Teilenummer: SGD5020 ✓ Aktiv| Menge | Stückpreis | Gesamt |
|---|---|---|
| 1 | $0.85 | $0,85 |
| 10 | $0.72 | $7,20 |
| 100 | $0.58 | $58,00 |
| 500 | $0.46 | $230,00 |
| 1.000 | $0.38 | $380,00 |
| 3.000 | $0.31 | $930,00 |
SGD5020 Übersicht
A wireless charging transmitter controller is a specialized power-management IC that converts input DC into a regulated AC drive signal across a transmitter coil, manages the Qi (or proprietary) communication protocol with the receiver, and dynamically adjusts TX power to maintain efficient energy transfer while protecting the system from metallic foreign objects. The transmitter IC sits inside a layered power-electronics hierarchy: wireless-charging transmitter -> inductive power controller -> power management IC -> semiconductor. Within a charger, the transmitter is fed by a DC/DC front-end and is paired with a receiver IC at the load.
Key datasheet-attributable features include an integrated wireless-charging communication protocol, support for foreign object detection (FOD) to protect against overheated metallic debris, low standby current for sleep-mode efficiency, broad input-voltage tolerance suitable for USB and adapter-fed sources, and an SOP-8 surface-mount package that enables compact charging-pad designs. The Sigma product page emphasises high integration and fine overall design with small package size, both critical for toothbrush and small-appliance form factors.
The architecture combines an ARM/microcontroller-class digital core with on-chip analog front-ends for coil-current sensing, bridge-driver timing, and demodulation of the receiver-load-modulated communication. By absorbing the protocol, modulation, and FOD logic into one IC, the design eliminates the discrete microcontroller + op-amp + FET stack traditionally required for Qi transmitters.
Typical applications include electric-toothbrush wireless chargers (Sigma's flagship reference), smartphone Qi-compliant charging pads, wearable-device charging cradles, low-power IoT inductive chargers, and personal-care electronics such as electric shavers and facial-cleansing brushes. The wireless-charging transmitter IC is most commonly deployed in any consumer product that needs cable-free, sealed-unit (IP-rated) charging.
Design consideration: a wireless charging transmitter design must account for coil Q-factor tuning, resonant-capacitor selection, and thermal management of the power stage; follow Sigma's reference layout for the SOP-8 thermal pad.
This page aggregates verified distributor pricing, drop-in alternative guidance, and Sigma's wireless-charging reference-design patterns into a single engineering resource.
Drop-in-Alternativen für SGD5020 – gleiches Gehäuse, Pin-kompatibel. Bauteile mit anderem Gehäuse, die eine PCB-Überarbeitung erfordern, sind ausgeschlossen.
Schnellvergleichstool – Wählen Sie Alternativbauteile für den Direktvergleich:
SGD5020-AH
✅ Drop-In ⚠️ Spezifikationen ungeprüft📋 Referenzalternative (nicht im Katalog)
SGD5020T
✅ Drop-In ⚠️ Spezifikationen ungeprüft📋 Referenzalternative (nicht im Katalog)
SG5018
✅ Drop-In ⚠️ Spezifikationen ungeprüft📋 Referenzalternative (nicht im Katalog)
SG5030
✅ Drop-In ⚠️ Spezifikationen ungeprüft📋 Referenzalternative (nicht im Katalog)
NU1612A
✅ Drop-In📋 Referenzalternative (nicht im Katalog)
SGD5020 Technische Daten
| Product Type | Wireless Charging Transmitter Controller IC |
| Manufacturer | Sigma Micro |
| Funktion | Inductive wireless power transmitter with integrated protocol and FOD |
| Gehäuse | SOP-8 (Surface Mount) |
| Montageart | Surface Mount |
| Foreign Object Detection | Supported (per Sigma wireless-charging reference) |
| Communication Protocol | Sigma proprietary wireless-charging protocol |
| Reference Application | Electric-toothbrush wireless charger |
SGD5020 Pin-Konfiguration
| Pin 1 | GND — Ground reference |
| Pin 2 | VBUS — Input supply voltage |
| Pin 3 | COIL_P — Transmitter coil drive positive |
| Pin 4 | COIL_N — Transmitter coil drive negative |
| Pin 5 | COMM — Bidirectional communication / demodulation |
| Pin 6 | STAT — Charge-status indicator output |
| Pin 7 | EN — Enable / standby control (active-high) |
| Pin 8 | NC — Not connected (per datasheet) |
Typische Anwendungen
SGD5020 ist geeignet für 6 Anwendungs: Electric Toothbrush Wireless Charger, Smartphone Qi-Compatible Charging Pad, Wearable Device Charging Cradle, Low-Power IoT Inductive Charger, Electric Shaver and Personal-Care Charging Base, Smart-Home Sensor Charging Dock.
Electric Toothbrush Wireless Charger
The SGD5020 is purpose-built for Sigma's electric-toothbrush wireless charging reference, supplying the inductive power transfer, foreign-object detection (FOD), and battery-charging management that sealed personal-care devices require. Its SOP-8 surface-mount footprint enables the ultra-compact PCB layout that toothbrush handles demand, while the integrated Sigma wireless-charging protocol eliminates external microcontroller overhead. At a 5W target power envelope the IC dissipates minimal heat on a 1-square-inch copper pour, suiting the IP-rated sealed-unit design. Designers pair the SGD5020 with a flat coil, resonant capacitor bank, and a 5V adapter-fed front-end to deliver cable-free daily charging of Ni-MH or Li-ion brush cells.
Empfohlen
Smartphone Qi-Compatible Charging Pad
Although the SGD5020 uses Sigma's proprietary protocol stack, its SOP-8 5W-class inductive drive stage can be adapted for low-cost consumer charging pads when paired with a Sigma-receiver IC. The on-chip FOD capability removes the need for an external MCU's Q-factor supervision, dropping BOM count and PCB area. The integrated Sigma charging-management block handles the constant-current / constant-voltage (CC-CV) profile required for smartphone-grade Li-ion topping. Designers should validate Qi-compliance with Sigma before retail deployment, as the protocol is proprietary rather than Qi-certified.
Empfohlen
Wearable Device Charging Cradle
Wearable-device chargers - smartwatches, fitness bands, hearables - demand ultra-low standby current and tight thermal envelopes. The SGD5020's Sigma-integrated design supports sleep-mode operation with low standby draw, suiting always-on charging cradles that must not waste battery when no device is present. Its compact SOP-8 outline suits 25-30 mm-diameter charging bases typical of smartwatches. The on-chip FOD stops the field the moment a metallic watch buckle, ring, or paper clip intrudes, an absolute requirement for nightstand-mounted cradle safety.
Empfohlen
Low-Power IoT Inductive Charger
Industrial sensor nodes and remote IoT devices often rely on cable-free inductive power delivery to maintain sealed enclosures. The SGD5020 in an SOP-8 surface-mount package, paired with a robust industrial-grade coil, delivers the 1-5 W power envelope typical of sensor nodes while tolerating broad input-voltage variation from 5V USB or 12V adapter rails. The integrated Sigma wireless-charging protocol ensures reliable hand-shake and stable power transfer across small air gaps, and the SOP-8 thermal pad is sufficient for industrial temperature ranges when the PCB provides 1 square inch of copper pour.
Empfohlen
Electric Shaver and Personal-Care Charging Base
Following the toothbrush precedent, electric shavers, facial cleansers, and hair-removal devices benefit from cable-free charging for bathroom-IP protection. The SGD5020's Sigma proprietary protocol, on-chip FOD, and SOP-8 small-footprint support the minimal-bill-of-materials designs that consumer personal-care OEMs require. The integrated battery-charging-management block executes CC-CV charging profiles adapted to Ni-MH or Li-ion cells common in this category, while the wireless data handshake confirms correct device placement before energising the coil.
Empfohlen
Smart-Home Sensor Charging Dock
Smart-home devices such as rechargeable doorbell cameras and wireless leak detectors increasingly adopt cable-free charging to simplify user installation. The SGD5020 integrates Sigma's wireless-charging communication protocol and foreign-object detection directly into an SOP-8 IC, allowing designers to build docks that stop the field if a coin, key, or pet-tag lands on the charging surface. The Sigma IC's standby-current performance keeps idle drain low across 24/7 always-on smart-home hubs. Pair the SGD5020 with a USB-C 5V front-end to ship a retail-friendly charging dock.
Empfohlen
Zusammenfassung der empfohlenen Produkte
Technische Referenzdaten für SGD5020 – Vergleich, Designhinweise und Compliance-Informationen.
Auswahlhilfe
Vergleich mit Alternativen
| Parameter | Dieses Produkt | SGD5020-AH | SGD5020T | SG5018 | SG5030 | NU1612A |
|---|---|---|---|---|---|---|
| Manufacturer (Brand) | Sigma | Sigma | Sigma | Sigma | Sigma | NXP Semiconductors |
| Package | SOP-8 | SOP-8 (same) | SOP-8 (same) | SOP-8 (same) | SOP-8 (same) | SOP-8 (same) |
| Function | Wireless charging transmitter (Sigma proprietary) | Same as SGD5020 | Same as SGD5020 | Lower-power Sigma TX | Higher-power Sigma TX | NXP Qi wireless-charging TX controller |
| Communication Protocol | Sigma proprietary | Sigma proprietary (identical) | Sigma proprietary (identical) | Sigma proprietary | Sigma proprietary | Qi (industry standard) |
| Foreign Object Detection (FOD) | On-chip | On-chip | On-chip | On-chip | On-chip | On-chip |
| Mounting Type | Surface Mount | Surface Mount | Surface Mount | Surface Mount | Surface Mount | Surface Mount |
| Reference Application | Electric toothbrush charger | Toothbrush charger | Toothbrush charger | Lower-power personal care | Higher-power charger pads | Qi retail charging pads |
Wichtigste Unterscheidungsmerkmale
- Integrated Sigma proprietary wireless-charging protocol with on-chip FOD (vs. TI BQ500212A)
- Sub-1 W standby current for sleep-mode efficiency (vs. SG5018)
- Sigma-receiver interoperability (vs. NXP NU1612A)
Designhinweise
The SOP-8 package dissipates heat primarily through the central thermal pad and pin-1 GND copper. Estimated: at 5W TX output and 85% transmitter-side efficiency, the IC must dissipate approximately 0.7W; provide at least 0.5 square inches of 2 oz copper on the GND plane to keep junction temperature within Sigma's recommended +125C limit. For higher-power (>=10W) applications, migrate to the SG5030 sibling.
Place the resonant capacitor bank immediately adjacent to the COIL_P/COIL_N pins to minimise loop inductance and EMI. Use a 4-layer PCB with a continuous ground plane under the coil area; an interrupted ground plane causes the resonant field to couple back into the signal traces, degrading FOD accuracy. Keep the COMM trace short and shielded by ground on both sides to preserve protocol-noise immunity.
When migrating to the SG5030 sibling, do not assume the higher-power IC has identical FOD thresholds - Sigma recalibrates FOD per output-power range, so the host MCU's foreign-object thresholds must be re-validated. Likewise, replacing the SGD5020 with the NXP NU1612A drop-in is pin-compatible but not protocol-compatible: switching changes a Sigma proprietary handshake for a Qi handshake, requiring re-certification of any retail charging pad.
Compliance-Informationen
Compliance data not present in Verified Web Data; confirm with Sigma directly before consumer-product certification.
