U2008B-MFPY - Bipolar Phase-Control IC for AC Motors | Microchip
N.º da peça: U2008B-MFPY ✓ Ativo| Qtd. | Preço unitário | Total |
|---|---|---|
| 1 | $3.2 | $3,20 |
| 10 | $2.85 | $28,50 |
| 100 | $2.4 | $240,00 |
| 500 | $1.95 | $975,00 |
| 1.000 | $1.65 | $1.650,00 |
U2008B-MFPY Visão geral
A phase-control IC is an analog/mixed-signal controller that delays the firing angle of a semiconductor switch (typically a triac) on each half-cycle of the AC mains, regulating the RMS voltage delivered to a load. Within the broader power-management hierarchy, the U2008B-MFPY belongs to the motor-driver and motion-controller IC family, which in turn sits under PMIC (Power Management IC) and discrete-semiconductor-driver categories. This sub-category is used universally in consumer appliances, power tools, and light-industrial motor controllers where cost-sensitive variable-speed AC motor drive is required.
Key features include full-wave load-current sensing for closed-loop torque regulation, automatic mains-voltage compensation to maintain constant motor speed across 110 V to 240 V mains, switchable soft-start or load-current sensing, and built-in voltage/current synchronization to the AC line. Internal voltage and current references provide a self-contained solution that typically needs only a triac, an RC timing network, and a sense resistor externally. Operating temperature range is -10 °C to +125 °C, suiting appliance and industrial environments.
Typical applications include universal-motor speed control in washing machines, vacuum cleaners, hand-held power tools, fans, and small pumps. According to the Atmel/Microchip datasheet, the IC's load-current feedback enables torque compensation, while the mains-compensation loop rejects ±20% line variation, ensuring constant motor speed regardless of supply fluctuations. The bipolar process technology gives robust transient immunity typical of mature appliance-class controllers.
When designing with this device, route the triac gate drive and the AC sense lines away from the mains to avoid dv/dt-induced misfires, and use a proper snubber on the triac. Always consult the manufacturer datasheet for the recommended sense-resistor value and RC timing network, as these set the soft-start time and the firing-angle range.
Alternativas drop-in para U2008B-MFPY — mesmo encapsulamento, compatível pino a pino. Peças de encapsulamento diferente que exigem retrabalho na PCB são excluídas.
Ferramenta de comparação rápida — selecione peças alternativas para comparação lado a lado:
U2008B-MFP
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U2008B-MFPG3
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U2010B-MFP
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U2010B-MFPG3
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U2008B-MFPG3Y
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U2008B-MFPY Classificações máximas e características elétricas
| Manufacturer | Microchip Technology (formerly Atmel / Telefunken Semiconductors) |
| Product Type | Bipolar Phase-Control IC / AC Motor Controller |
| Número de saídas | 1 |
| Topologia | Phase-control, full-wave with triac gate drive |
| Supply Voltage (VCC) | 14.5 V to 16.5 V |
| Load Voltage (Mains) | Mains-coupled, externally triac-limited |
| Temperatura de operação | -10 °C to +125 °C |
| Encapsulamento | 8-pin SOIC (SO-8) |
| Tipo de montagem | Surface Mount |
| Mains Compensation | Yes, automatic |
| Load-Current Sensing | Yes, full-wave |
| Soft-start | Yes, variable / switchable |
| Overload Protection | Yes (load-current feedback) |
| Voltage/Current Synchronization | Yes, internal to AC line |
Configuração de pinos do U2008B-MFPY
| Pino 1 | VS / SYNC — Mains voltage synchronization / supply sense input |
| Pino 2 | RC — External RC timing network sets firing angle |
| Pino 3 | SENSE — Load-current sensing input (full-wave) |
| Pino 4 | GND — Ground |
| Pino 5 | GATE — Triac gate drive output |
| Pino 6 | REF — Internal reference / compensation network |
| Pino 7 | SS/LS — Soft-start / load-sense select |
| Pino 8 | VCC — +14.5 V to +16.5 V supply |
Aplicações típicas
U2008B-MFPY é adequado para 6 aplicaçãos: Washing-Machine Universal-Motor Speed Control, Vacuum-Cleaner Suction-Motor Control, Hand-Held Power-Tool Speed Control, Kitchen-Appliance Motor Control (Mixers, Blenders), Ceiling-Fan and Exhaust-Fan Speed Regulation, Small Pump and Compressor Speed Drive.
Washing-Machine Universal-Motor Speed Control
The U2008B-MFPY's full-wave load-current sensing and mains-compensated phase control make it a natural fit for washing-machine drum-motor drive. The IC closes a torque-control loop via an external sense resistor, holding constant drum speed through wash-spin transitions even as laundry load changes. Its 14.5-16.5 V single-rail supply derives cheaply from the AC mains via a dropping resistor, eliminating the need for an auxiliary switching converter, while the integrated soft-start prevents drum-impact current spikes at the start of each cycle.
Recomendado
Vacuum-Cleaner Suction-Motor Control
Hand-stick and canister vacuum cleaners rely on universal motors whose suction must stay roughly constant as filter loading changes. The U2008B-MFPY senses load current continuously and adjusts the triac firing angle to maintain target RPM, so the user perceives steady suction even as the filter clogs. Its -10 to +125 °C operating range tolerates the hot air near the motor, and the small SO-8 footprint suits the cramped handle-mounted control PCB typical of cordless vacuums.
Recomendado
Hand-Held Power-Tool Speed Control
Drills, jigsaws, and angle grinders use the U2008B-MFPY to provide trigger-proportional speed with soft-start. The IC's variable soft-start prevents the dangerous torque kick when the trigger is pulled from standstill, protecting gearboxes and clutches. Because the part needs only an external triac, a sense resistor, and an RC network, the total BOM cost is well below an MCU-based solution, which is decisive in cost-sensitive consumer power tools.
Recomendado
Kitchen-Appliance Motor Control (Mixers, Blenders)
Countertop mixers and blenders use small universal motors whose speed the user sets with a rotary knob. The U2008B-MFPY's mains-compensation holds the selected speed across brown-out and over-voltage events on unstable mains, while its soft-start limits inrush so the kitchen appliance does not trip the house breaker on cold-start. Operating up to 125 °C, the IC sits safely inside the appliance housing near the motor without additional cooling.
Recomendado
Ceiling-Fan and Exhaust-Fan Speed Regulation
Ceiling fans and bathroom exhaust fans use shaded-pole or small universal motors that can be phase-angle modulated for stepless speed control. The U2008B-MFPY drives the external triac to vary the RMS voltage on the motor winding, giving smooth speed ramps instead of the discrete steps produced by capacitor-style fan switches. Its overload-protection feature, derived from load-current sensing, can also be wired to shut down on stalled-rotor conditions, adding a safety net for unattended fans.
Recomendado
Small Pump and Compressor Speed Drive
Aquarium pumps, bilge pumps, and small diaphragm compressors benefit from the U2008B-MFPY's closed-loop load-current feedback, which keeps flow rate constant despite head-pressure variation. The IC's automatic mains compensation rejects ±20% line variation, so a 110 V pump running on a 130 V generator still delivers rated flow. The 8-pin SOIC footprint makes the controller PCB a small module that can be retrofitted into existing pump housings without mechanical redesign.
Recomendado
Resumo dos produtos recomendados
Dados de referência de engenharia para U2008B-MFPY — comparação, orientação de projeto e informações de conformidade.
Guia de seleção
Comparação com alternativas
| Parâmetro | Este produto | U2008B-MFP | U2008B-MFPG3 | U2008B-MFPG3Y | U2010B-MFP | U2010B-MFPG3 |
|---|---|---|---|---|---|---|
| Brand | Microchip Technology (formerly Atmel / TFK) | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Package | SOIC-8 | SOIC-8 - same | SOIC-8 - same | SOIC-8 - same | SOIC-8 - same | SOIC-8 - same |
| Supply Voltage (VCC) | 14.5 V to 16.5 V | 14.5 V to 16.5 V | 14.5 V to 16.5 V | 14.5 V to 16.5 V | 14.5 V to 16.5 V | 14.5 V to 16.5 V |
| Operating Temperature | -10 °C to +125 °C | -10 °C to +125 °C | -10 °C to +125 °C | -10 °C to +125 °C | -10 °C to +125 °C | -10 °C to +125 °C |
| Topology | Phase-control, full-wave load-current sensing | Phase-control, full-wave (same die) | Phase-control, full-wave (same die) | Phase-control, full-wave (same die) | Phase-control, improved regulation | Phase-control, improved regulation |
| Soft Start | Yes, variable / switchable | Yes, variable / switchable | Yes, variable / switchable | Yes, variable / switchable | Yes, programmable | Yes, programmable |
| Mains Compensation | Yes, automatic | Yes, automatic | Yes, automatic | Yes, automatic | Yes, automatic (improved accuracy) | Yes, automatic (improved accuracy) |
| Lifecycle Status | Active (legacy Atmel/TFK silicon) | Active (legacy Atmel/TFK silicon) | Active (legacy Atmel/TFK silicon) | Active (legacy Atmel/TFK silicon) | Active (newer variant) | Active (newer variant) |
Principais diferenciais
- Full integration of phase control + load-current feedback in a single analog IC (vs Discrete RC phase-control circuits)
- Automatic mains-voltage compensation built in (vs MCU-based phase-angle drives)
- Switchable soft-start / load-current sensing (vs Fixed-function competitors)
Notas de projeto
Route the triac gate-drive trace and the AC mains sense traces away from each other and away from the VCC rail. The IC's mains-synchronization input switches at high dv/dt; a coupling capacitance of even a few pF into the gate output can cause premature triac firing. Keep a clear creepage distance of at least 6 mm between mains-voltage traces and the low-voltage control section per IEC 60065 / IEC 60730 for household appliances.
Choose the external triac with adequate surge-current (ITSM) capability for the motor's locked-rotor inrush. A BTA16 is typically adequate for universal motors up to 1500 W; smaller BTA08 packages overheat on stall. Always add an RC snubber across the triac (typically 100 Ω + 100 nF) to prevent dv/dt retriggering, and size the sense resistor so that the IC's load-sense input does not exceed its absolute-maximum rating during motor stall.
The SO-8 package has a θJA of approximately 150 °C/W on a 1-oz 2-layer board with minimal copper. Because the U2008B-MFPY typically dissipates only 50-200 mW, no heatsink is required, but the external triac and sense resistor will run much hotter and dominate the thermal design. Estimate: at full 2 A RMS motor current, a BTA16 in TO-220 dissipates ~2 W and needs at least 10 cm² of copper pour or a clip-on heatsink to stay below 100 °C.
Informações de conformidade
Compliance data not published in the verified web sources for the U2008B-MFPY; the part was originally released by Atmel in 1997 and later transferred to Telefunken Semiconductors before Microchip. The G3Y suffix typically denotes a lead-free / RoHS variant per Atmel/Microchip naming conventions, but verify with the manufacturer's product page before use.
