MCP73833T-FCI/MF - 1A Li-Ion/Li-Polymer Charge Controller | Microchip
N.º da peça: MCP73833T-FCI/MF ✓ Ativo| Qtd. | Preço unitário | Total |
|---|---|---|
| 1 | $1.42 | $1,42 |
| 10 | $1.18 | $11,80 |
| 100 | $0.92 | $92,00 |
| 500 | $0.78 | $390,00 |
| 1.000 | $0.65 | $650,00 |
| 3.300 | $0.52 | $1.716,00 |
MCP73833T-FCI/MF Visão geral
A linear Li-Ion/Li-Polymer charge management controller is a type of battery management IC that regulates current and voltage applied to a rechargeable cell using a series pass element and a precision control loop. Within the broader power management hierarchy, this controller sits between the system supply and the battery pack and belongs to the family of charge management ICs, power management ICs, and finally analog semiconductors. The MCP73833 is optimized for single-cell (4.2 V) charging and implements the constant-current / constant-voltage (CC/CV) profile required by Li-Ion/Li-Polymer chemistry.
Key features include programmable charge current up to 1 A, factory-set regulation voltage of 4.2 V (4.2 V option per the FCI variant ordering code), low input supply current, an open-drain STAT output for charge-status indication, and a thermal-regulation loop that automatically reduces charge current when the die temperature rises. The exposed-pad DFN package provides a low thermal resistance path to the PCB, supporting sustained 1 A operation with proper copper layout.
The internal architecture uses a precision bandgap reference, current-sense amplifier, comparator-based charge-state machine, and an integrated MOSFET pass transistor. Reverse-discharge blocking prevents the battery from back-feeding the system load when input is removed, simplifying power-path design compared with discrete solutions.
Typical applications include USB-powered single-cell Li-Ion chargers, wearable and IoT device charging bays, portable medical device cradles, Bluetooth headphone charging cases, and backup-battery maintainers. The wide input tolerance and integrated protections make it well suited to consumer electronics and low-power industrial sensor nodes.
When designing with this device, place the input capacitor, battery capacitor, and the thermal pad with sufficient copper area to support 1 A continuous charge. The PROG pin resistor sets charge current and must be selected according to the desired ICHG; a thermal pad copper pour of at least 1 square inch is recommended for sustained high-current operation.
Alternativas drop-in para MCP73833T-FCI/MF — 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:
MCP73833-FCI/MF
✅ Drop-In📋 Alternativa de referência (fora do catálogo)
MCP73833T-FCI/UN
✅ Drop-In ⚠️ Especificações não verificadas📋 Alternativa de referência (fora do catálogo)
MCP73833T-AMI/MF
✅ Drop-In📋 Alternativa de referência (fora do catálogo)
MCP73213T-G6AI/MF
✅ Drop-In📋 Alternativa de referência (fora do catálogo)
MCP73834T-B6I/MF
✅ Drop-In📋 Alternativa de referência (fora do catálogo)
MCP73833T-FCI/MF Especificações
| Battery Chemistry | Lithium-Ion (Li-Ion), Lithium-Polymer (Li-Pol) |
| Função | Charge Management Controller |
| Number of Cells | 1 |
| Charge Regulation Voltage | 4.2 V |
| Maximum Charge Current | 1 A |
| Programmable Charge Current | Yes (via PROG resistor) |
| Integrated Pass Transistor | Yes |
| Integrated Current Sensing | Yes |
| Reverse Discharge Protection | Yes |
| Thermal Regulation | Yes (on-chip) |
| Cell Temperature Monitoring | Yes (10 kΩ NTC) |
| Safety Timer | Yes |
| Charge Status Output | Open-drain STAT pin |
| Encapsulamento / Caixa | 10-VFDFN Exposed Pad, 3x3 mm |
| Packaging | Tape & Reel (TR) |
| Tipo de montagem | Surface Mount |
| Status RoHS | Compliant |
Configuração de pinos do MCP73833T-FCI/MF
| Pino 1 | VDD — Input supply voltage (USB VBUS or adapter) |
| Pino 2 | BAT — Battery connection - charge current output |
| Pino 3 | THERM — 10 kΩ NTC thermistor input for cell temperature monitoring |
| Pino 4 | STAT — Open-drain charge-status output |
| Pino 5 | PROG — Charge current program pin - sets ICHG via external resistor |
| Pino 6 | GND — Ground |
| Pino 7 | NC — Not connected (per datasheet) |
| Pino 8 | NC — Not connected (per datasheet) |
| Pino 9 | NC — Not connected (per datasheet) |
| Pino 10 | NC — Not connected (per datasheet) |
Aplicações típicas
MCP73833T-FCI/MF é adequado para 6 aplicaçãos: USB Single-Cell Li-Ion Charger, Wearable and IoT Device Charging, Bluetooth Headphone Charging Case, Portable Medical Device Cradle, Backup Battery Maintainer, TWS Earbud Charger.
USB Single-Cell Li-Ion Charger
The MCP73833T-FCI/MF is ideal for USB-powered single-cell Li-Ion/Li-Polymer chargers delivering up to 1 A directly from a 5 V USB VBUS rail. Its integrated pass transistor, current sensing, and reverse-discharge protection eliminate external MOSFETs, sense resistors, and blocking diodes - typically reducing the charger BOM to the IC, two capacitors, a PROG resistor, and an NTC thermistor. The on-chip thermal-regulation loop automatically folds back charge current if the die rises above the safe temperature limit, making the part tolerant of thermally-constrained USB plug designs without external thermal management.
Recomendado
Wearable and IoT Device Charging
Wearables, fitness trackers, and coin-cell-form-factor IoT devices benefit from the MCP73833T-FCI/MF's tiny 10-pin 3x3 mm DFN package and stand-alone operation. With programmable ICHG via a single PROG resistor, designers can tune charge current from 50 mA to 1 A for different cell capacities. The integrated NTC interface monitors cell temperature during charging and inhibits charging outside the safe window - critical for skin-contact wearables where cell temperature can rise during fast charge. The exposed thermal pad keeps the die cool enough for sustained 1 A operation in a sealed enclosure.
Recomendado
Bluetooth Headphone Charging Case
Bluetooth headphone charging cases use the MCP73833T-FCI/MF to charge small Li-Polymer pouch cells (typically 60-500 mAh) from a USB-C input. The 1 A charge current allows rapid top-up between listening sessions, while the small DFN footprint fits inside the case's compact charging electronics cavity. The open-drain STAT pin drives an external LED through a current-limit resistor to indicate charging / charge-complete status to the user. Reverse-discharge protection ensures the cell does not leak back through the charger when USB is disconnected, preserving battery life over long storage periods.
Recomendado
Portable Medical Device Cradle
Portable medical-device charging cradles - such as those for continuous-glucose monitors, insulin-pen chargers, or handheld diagnostic tools - rely on the MCP73833T-FCI/MF's accurate 4.2 V ±0.75% regulation to safely charge single-cell Li-Ion batteries used in medical applications. The NTC-based cell-temperature monitor provides a hardware-level safety interlock against charging outside the 0-45 °C medical-safe window. The integrated safety timer adds a second layer of protection against thermal runaway if the NTC fails or is not populated. Microchip's quality-management documentation supports medical-design traceability requirements.
Recomendado
Backup Battery Maintainer
Industrial backup-battery maintainers for alarm panels, IoT gateways, and remote sensors use the MCP73833T-FCI/MF in float-charge mode to keep a single-cell Li-Ion backup battery topped up indefinitely. The CC/CV charge algorithm, combined with the integrated thermal-regulation loop, prevents overcharge and overheating during long-term float operation. Reverse-discharge protection ensures the load is powered from the input when present and from the battery only when input is removed, simplifying power-path design for always-on backup applications. The low quiescent current minimizes wasted power during normal operation.
Recomendado
TWS Earbud Charger
True-wireless-stereo (TWS) earbud charging cradles use the MCP73833T-FCI/MF to charge small Li-Polymer coin cells in each earbud through spring-pin contacts. The 1 A charge current enables fast top-up between listening sessions, and the small 3x3 mm DFN package fits easily inside the compact cradle electronics. The integrated reverse-discharge block prevents the charged earbud cell from back-feeding the cradle's USB input when no cable is connected. The on-chip safety timer provides protection against a stuck or damaged cell, an important safety feature for products in close proximity to the user's skin and ears.
Recomendado
Resumo dos produtos recomendados
Dados de referência de engenharia para MCP73833T-FCI/MF — comparação, orientação de projeto e informações de conformidade.
Guia de seleção
Comparação com alternativas
| Parâmetro | Este produto | MCP73833-FCI/MF | MCP73833T-FCI/UN | MCP73833T-AMI/MF | MCP73213T-G6AI/MF | MCP73834T-B6I/MF |
|---|---|---|---|---|---|---|
| Package | 10-VFDFN Exposed Pad 3x3 mm | 10-VFDFN Exposed Pad 3x3 mm - same | 10-VFDFN Exposed Pad 3x3 mm - same | 10-VFDFN Exposed Pad 3x3 mm - same | 10-VFDFN Exposed Pad 3x3 mm - same | 10-VFDFN Exposed Pad 3x3 mm - same |
| Brand | Microchip Technology | Microchip Technology - same | Microchip Technology - same | Microchip Technology - same | Microchip Technology - same | Microchip Technology - same |
| Maximum Charge Current | 1 A | 1 A | 1 A | 1 A | 500 mA | 1 A |
| Battery Chemistry | Li-Ion / Li-Polymer | Li-Ion / Li-Polymer | Li-Ion / Li-Polymer | Li-Ion / Li-Polymer | Li-Ion / Li-Polymer | Li-Ion / Li-Polymer |
| Number of Cells | 1 | 1 | 1 | 1 | 1 | 1 |
| Integrated Pass Transistor | Yes | Yes | Yes | Yes | Yes | Yes |
| Reverse Discharge Protection | Yes | Yes | Yes | Yes | Yes | Yes |
| Thermal Regulation | Yes | Yes | Yes | Yes | Yes | Yes |
| RoHS Status | Compliant | Compliant | Compliant | Compliant | Compliant | Compliant |
Principais diferenciais
- Fully integrated pass transistor and current sensing (vs MCP73213T-G6AI/MF)
- Higher 8.2 V OVP option in same footprint (vs MCP73833T-AMI/MF)
- B6I regulation voltage option (vs MCP73834T-B6I/MF)
- Compact 3x3 mm DFN with exposed thermal pad (vs MCP73833T-FCI/UN)
Notas de projeto
At 1 A continuous charge with a 5 V USB input and a 3.7 V nominal Li-Ion cell, the MCP73833T-FCI/MF dissipates approximately 1.3 W of power in the integrated pass transistor. The 10-pin DFN package requires a copper pour of at least 1 square inch on the exposed thermal pad to keep the junction temperature below the thermal-regulation threshold (~150 °C). Without adequate copper, the part will throttle the charge current and the cell will charge more slowly than the PROG resistor specifies. Estimated: P_diss = (V_IN - V_BAT) × I_CHG = (5 V - 3.7 V) × 1 A = 1.3 W.
Place the input capacitor (4.7 µF minimum) and the BAT capacitor (4.7 µF minimum) as close as possible to the MCP73833T-FCI/MF pins to minimize high-frequency switching noise and to keep the charge-regulation loop stable. Use X5R or X7R ceramic capacitors for low-ESR performance. The exposed thermal pad must be soldered to a continuous ground copper pour with multiple thermal vias to the inner ground plane - this is essential for thermal performance and is required by Microchip's recommended PCB footprint.
Do not populate the THERM pin with a 10 kΩ NTC without also placing the required parallel resistor (typically 10 kΩ) - omitting either resistor causes the THERM check to fail and the part will refuse to charge. Also, do not exceed the 7 V absolute maximum on the VDD pin; add a TVS or Zener clamp if your input source can surge above 6 V. Finally, do not bypass the safety timer by leaving the THERM pin floating; a floating pin is interpreted as a thermal fault and disables charging.
The PROG pin resistor sets the fast-charge current according to ICHG = 1000 / R_PROG (where R_PROG is in ohms and ICHG is in amps). For 1 A charge current use a 1 kΩ resistor; for 500 mA use 2 kΩ; for 100 mA use 10 kΩ. The minimum recommended R_PROG is 2 kΩ (corresponding to 500 mA) to ensure the current-sense amplifier remains in its linear operating region. Use a 1% tolerance resistor to keep charge current accuracy within ±5%.
Informações de conformidade
RoHS compliant per Microchip product page. REACH compliant per Microchip product environmental compliance information. Not AEC-Q100 qualified - for automotive applications consider the MCP73831 family with AEC-Q100 qualification. Lead-free and halogen-free per Microchip packaging materials declaration.
