Qi (WPC) Compliant Highly Integrated Secondary-Side Direct Lithium Ion Charger. - BQ51050B

BQ51050B (ACTIVE)

Qi (WPC) Compliant Highly Integrated Secondary-Side Direct Lithium Ion Charger.

Description

The bq5105x device is a high-efficiency, Qi-compliant wireless power receiver with an integrated Li-Ion/Li-Pol battery charge controller for portable applications. The bq5105xB devices provide efficient AC-DC power conversion, integrates the digital controller required to comply with Qi v1.1 communication protocol, and provides all necessary control algorithms needed for efficient and safe Li-Ion and Li-Pol battery charging. Together with the bq500212A transmitter-side controller, the bq5105x enables a complete wireless power transfer system for direct battery charger solutions. By using near-field inductive power transfer, the receiver coil embedded in the portable device can pick up the power transmitted by transmitter coil. The AC signal from the receiver coil is then rectified and conditioned to apply power directly to the battery.  Global feedback is established from the receiver to the transmitter to stabilize the power transfer process.  This feedback is established by using the Qi v1.1 communication protocol.

The bq5105xB devices integrate a low-impedance synchronous rectifier, low-dropout regulator (LDO), digital control, charger controller, and accurate voltage and current loops in a single package.  The entire power stage (rectifier and LDO) use low-resistance N-MOSFETs (100-mΩ typical Rdson) to ensure high efficiency and low power dissipation.

Features

  • Single-Stage Wireless Power Receiver
    and Li-Ion/Li-Pol Battery Charger
    • Combines Wireless Power Receiver, Rectifier, and
      Battery Charger in a Single, Small
      Package
    • 4.20-V, 4.35-V, and 4.40-V Output Voltage
      Options
    • Supports a Charging Current up to 1.5 A
    • 93% Peak AC-DC Charging Efficiency
  • Robust Architecture
    • 20-V Maximum Input Voltage Tolerance,
      With Input Overvoltage Protection
    • Thermal Shutdown and Overcurrent Protection
    • Temperature Monitoring and Fault Detection
  • Compatible With WPC v1.1 Qi Industry Standard
  • Power Stage Output Tracks Rectifier and Battery
    Voltage to Ensure Maximum Efficiency Across the
    Full Charge Cycle
  • Available in Small DSGBA and VQFN Packages

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Parametrics Compare all products in Wireless Power Solutions

 
Function
Pout (Typ) (W)
Compliance
Vin (Max) (V)
Vrect (reg) (V)
Iout (Max) (A)
Vout (regulated) (V)
Rating
Operating Temperature Range (C)
Pin/Package
Approx. Price (US$)
BQ51050B BQ51003 BQ51010B BQ51013B BQ51020 BQ51051B BQ51052B BQ51221
Receiver     Receiver     Receiver     Receiver     Receiver     Receiver     Receiver     Receiver    
5     2.5     5     5     5     5     5     5    
Qi-Compliant Wireless Power Reciever             Qi-Compliant Wireless Power Reciever     Qi-Compliant Wireless Power Reciever      
20     20     20     20     20     20     20     20    
Tracks (Vbat+300mV)     Dynamic     Dynamic     Dynamic     Dynamic     Tracks (Vbat + 300mV)     Tracks (Vbat +300mV)     Dynamic    
1.5     0.5     1.5     1.5     1.5     1.5     1     2    
4.2     5     7     5     8     4.35     4.4     5    
Catalog     Catalog     Catalog     Catalog     Catalog     Catalog     Catalog     Catalog    
  -40 to 85     -40 to 85       -40 to 125       0 to 125     -40 to 85    
20VQFN
28DSBGA    
28DSBGA     28DSBGA     20VQFN
28DSBGA    
42DSBGA     20VQFN
28DSBGA    
28DSBGA     42DSBGA    
1.90 | 1ku     1.30 | 1ku     1.80 | 1ku     1.75 | 1ku     2.50 | 1ku     1.90 | 1ku     1.90 | 1ku     3.00 | 1ku    
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