Allicdata Part #: | 296-27437-2-ND |
Manufacturer Part#: |
BQ24156YFFR |
Price: | $ 1.96 |
Product Category: | Integrated Circuits (ICs) |
Manufacturer: | Texas Instruments |
Short Description: | IC LI-ION CHARGE MGMT 20DSBGA |
More Detail: | Charger IC Lithium-Ion/Polymer 20-DSBGA (2.1x2) |
DataSheet: | BQ24156YFFR Datasheet/PDF |
Quantity: | 1000 |
3000 +: | $ 1.78473 |
Series: | -- |
Packaging: | Tape & Reel (TR) |
Part Status: | Not For New Designs |
Battery Chemistry: | Lithium-Ion/Polymer |
Number of Cells: | 1 |
Current - Charging: | Constant - Programmable |
Programmable Features: | Current, Timer |
Fault Protection: | Over Temperature, Over Voltage |
Charge Current - Max: | 1.5A |
Battery Pack Voltage: | 4.44V (Max) |
Voltage - Supply (Max): | 9V |
Interface: | I²C |
Operating Temperature: | -30°C ~ 85°C (TA) |
Package / Case: | 20-UFBGA, DSBGA |
Supplier Device Package: | 20-DSBGA (2.1x2) |
Base Part Number: | BQ24156 |
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Power management is an important key factor in the successful operation of electronic systems. In the market, there is a great variety of power management integrated circuits (PMIC) that attempt to address all the power-related needs of a system ranging from basic power delivery and management to multi-channel battery charging. These products come in many families and forms and simplify design efforts by providing complete and versatile solutions.
Texas Instruments\' BQ24156YFFR is one such family of PMICs specifically designed for charging Battery Cells. These smart Li-ion battery chargers offer an advanced, integrated and flexible solution for battery charging control, featuring an input current control scheme, allowing high power input solutions for faster charging algorithms over a broad range of input voltage and for higher ambient temperature operation.
Features:
- Efficient, integrated, charger IC solution
- Input voltage regulation to ensure correct battery charging
- Wide input range capability with low start-up currents
- Multi-channel battery cell charger to multiplex up to four series Li-ion/ Li-polymer cells with independent charging control
- Four cells fully independent or multi-cell synchronous charging control
- Optional PWM current loop control when using a charge delimit circuit
- Optional enable input to facilitate synchronized charging
- Thermal monitoring / thermal regulation
Applications:
The BQ24156YFFR application field includes tablet computers, smart phones, digital cameras, digital camcorders, portable media players, external battery power supplies and slim power tools. With the development of modern technology, more and more portable devices are included.
The working principle of the BQ24156YFFR is simple. It has two input sources, one is VBUS and the other is AC adapter or USB power. Both sources are regulated to 5V and fed to the integrated switching MOSFET. The current loop controls the output current generated by the integrated MOSFET, substituting the traditional linear current regulator. The current loop features a n-channel MOSFET, a P-channel MOSFET, and a current sense resistor which creates a closed loop.
The current loop is designed using a constant ON-time control that is discussed in detail in the datasheet. As the current loop of the BQ24156YFFR starts up, it looks at the current in the system, and drives the appropriate MOSFET at the appropriate time to generate the output current. In other words, it does not use an external feedback loop, thus simplifying the design.
The charger also has two voltage regulation control loops. A voltage control loop comprising of a comparator and an H-bridge set monitors the battery level and adjusts the voltage to the appropriate level for the corresponding cell. An overload control loop detects the output voltage when the load exceeds the maximum current limit and it shuts down the output, thus preventing further damage to the device.
In addition, the BQ24156YFFR also features an overvoltage protection circuit which monitors the battery voltage and limits it to the charger’s allowable maximum. This circuit prevents the battery cell from being overcharged, which can degrade its capability or cause other safety hazards. Other safety features such as over temperature protection, battery isolation and an automatic discharge circuit are also available.
The specific data is subject to PDF, and the above content is for reference
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