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High efficiency synchronous switch-mode charger controller – solar battery charger

Inventory: 5,322
Custom reel may be available

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Packaging information

Package | Pins VQFN (RVA) | 16
Operating temperature range (℃) I (-40 to 85)
Package qty | Carrier: 3,000 | LARGE T&R
Custom reel may be available
View more packaging information

Quality information

RoHS Yes
Lead finish / Ball material NIPDAU
MSL rating / Peak reflow Level-2-260C-1 YEAR
Material content View
DPPM / MTBF / Fit rate View
Qualification summary View
Ongoing reliability monitoring View
Device marking View


  • Maximum Power Point Tracking (MPPT) capability by input Voltage regulation
  • Programmable MPPT setting
  • 5-V to 28-V Input solar panel
  • 600-kHz NMOS-NMOS Synchronous buck controller
  • Resistor programmable float voltage
  • Accommodates Li-Ion/Polymer, LiFePO4, lead acid chemistries
  • Accuracy
    • ±0.5% Charge voltageregulation
    • ±3% Charge current regulation
    • ±0.6% Inputvoltage regulation
  • High Integration
    • Internal loop compensation
    • Internal digitalsoft start
  • Safety
    • Inputovervoltage protection
    • Battery temperature-sensing
    • Batteryabsent detection
    • Thermalshutdown
  • Charge status outputs for LED or host processor
  • Charge enable on MPPSET pin
  • Automatic sleep mode for low power consumption
    • < 15-µA OFF-state battery dischargecurrent
  • Small 3.5 × 3.5 mm2 16-pin QFN package

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The BQ24650 device is a highly integrated switch-mode battery charge controller. Itprovides input voltage regulation, which reduces charge current when input voltage falls below aprogrammed level. When the input is powered by a solar panel, the input regulation loop lowers thecharge current so that the solar panel can provide maximum power output.

The BQ24650 offers a constant-frequency synchronous PWM controller with high accuracycurrent and voltage regulation, charge preconditioning, charge termination, and charge statusmonitoring.

The BQ24650 charges the battery in three phases: pre-conditioning, constant current, andconstant voltage. Charge is terminated when the current reaches 1/10 of the fast charge rate. Thepre-charge timer is fixed at 30 minutes. The BQ24650 automatically restarts the charge cycle if thebattery voltage falls below an internal threshold and enters a low quiescent current sleep modewhen the input voltage falls below the battery voltage.

The BQ24650 supports a battery from 2.1 V to 26 V with VFB set to a 2.1-V feedbackreference. The charge current is programmed by selecting an appropriate sense resistor. The BQ24650is available in a 16 -pin, 3.5 mm × 3.5 mm2 thin QFN package.

Qty Price
1-99 $3.24
100-249 $2.64
250-999 $2.08
1,000+ $1.76

Alternative carriers

Part number BQ24650RVAT
Package qty | Carrier 250 | SMALL T&R
Inventory 8,816
Qty | Price (USD) 1ku | $2.02