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MAX17048G+

1-cell Li+ fuel gauge, ModelGauge, 3uA hibernate, I2C, TDFN 2x2mm

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Pieza del fabricante：

MAX17048G+

Paquete：

8-pin TDFN (2.0 x 2.0 x 0.75mm)

Marca：
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Descripción

Productos

The MAX17048G+ is an ultra-low power 1-cell lithium battery fuel gauge from Analog Devices (formerly Maxim Integrated) using the ModelGauge algorithm to track state-of-charge (SOC) without a current-sense resistor. With 3uA hibernate current and 23uA active current, it provides accurate fuel gauging via I2C interface in a tiny 8-pin TDFN package.

Especificaciones

Cells Supported 1 cell (Li+)
Algorithm ModelGauge
Voltage Measurement Accuracy +/-7.5mV/cell
Active Supply Current 23uA
Hibernate Current 3uA
Tensión de alimentación 2.5V to 4.5V
Interface I2C
Voltage Resolution 1.25mV/cell
Paquete 8-pin TDFN (2x2mm)
Temperatura de funcionamiento -40 to +85C

Características

  • ModelGauge algorithm eliminates current-sense resistor
  • 3uA hibernate current, 23uA active
  • +/-7.5mV/cell voltage measurement accuracy
  • No battery learn cycles required
  • Automatic hibernate entry/exit
  • Configurable alerts (low SOC, voltage, 1% SOC change)
  • I2C interface for SOC and voltage readout
  • 2x2mm TDFN package

Aplicaciones

  • Smartphones and tablets
  • Smartwatches and wearables
  • Bluetooth headsets
  • Medical devices
  • Portable instruments

The MAX17048G+ is an ultra-low power 1-cell lithium battery fuel gauge from Analog Devices using the proprietary ModelGauge algorithm to track battery state-of-charge continuously without a current-sense resistor or battery learn cycles. With 3uA hibernate current and 23uA active current, it automatically enters and exits low-power modes. The I2C interface provides access to SOC, voltage, and rate data. The tiny 2x2mm TDFN package makes it ideal for space-constrained portable devices.

The MAX17048 uses the ModelGauge algorithm which models the lithium-ion battery’s open-circuit voltage (OCV) curve. By continuously measuring the cell voltage and comparing it to the OCV model, the device calculates state-of-charge without coulomb counting. This approach eliminates the accumulated errors inherent in traditional coulomb counters and removes the need for a current-sense resistor. The device automatically detects low-current states and enters 3uA hibernate mode while still tracking SOC. Configurable alerts can interrupt the host when battery levels reach critical thresholds.

Pin Nombre Tipo Función
1 CTG Entrada Charge/discharge rate indication
2 ALRT Salida Alert output (active low)
3 GND Suelo Referencia del suelo
4 SDA E/S I2C data line
5 SCL Entrada I2C clock line
6 VDD Potencia Supply voltage (2.5-4.5V)
7 CELL Entrada Battery cell voltage input
8 QSTRT Entrada Quick-start control
  • Smartphone battery fuel gauging
  • Smartwatch and wearable battery monitoring
  • Bluetooth headset battery status
  • Portable medical device battery management
  • Wireless speaker battery life indication
Fabricante Número de pieza Paquete Notas
ADI MAX17049G+ TDFN-8 2-cell version
TI BQ27421-G1A SON-9 1-cell fuel gauge with coulomb counting
ADI MAX17048X+ WLP-8 Wafer-level package (0.9×1.7mm)
Richtek RT9428 WDFN-8 Battery fuel gauge alternative
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