BQ25756E
Stand-alone or I²C-controlled bidirectional buck-boost charge controller for up to 7S batteries
BQ25756E
- Wide input voltage operating range: 4.2 V to 36 V
- Wide battery voltage operating range: up-to 36 V with multi-chemistry support:
- 1- to 7-cell Li-ion charge profile
- 1- to 9-cell LiFePO 4 charge profile
- Synchronous buck-boost charge controller with NFET drivers
- Adjustable switching frequency from 200 kHz to 600 kHz
- Optional synchronization to external clock
- Integrated loop compensation with soft start
- Optional gate driver supply input for optimized efficiency
- Automatic maximum power point tracking (MPPT) for solar charging
- Bidirectional converter operation (Reverse Mode) supporting USB-PD Extended Power Range (EPR)
- Adjustable input voltage (VAC) regulation from 3.3 V to 36 V with 20-mV/step
- Adjustable input current regulation (R AC_SNS) from 400 mA to 20 A with 50-mA/step using 5-mΩ resistor
- High accuracy
- ±0.5% charge voltage regulation
- ±3% charge current regulation
- ±3% input current regulation
- I 2C controlled for optimal system performance with resistor-programmable option
- Hardware adjustable input and output current limits
- Integrated 16-bit ADC for voltage, current, and temperature monitoring
- High safety integration
- Adjustable input overvoltage and undervoltage protection
- Battery overvoltage and overcurrent protection
- Charging safety timer
- Battery short protection
- Thermal shutdown
- Status outputs
- Adapter present status ( PG)
- Charger operation status (STAT1, STAT2)
- Package
- 36-pin 5 mm × 6 mm QFN
The BQ25756E is a wide input voltage, switched-mode buck-boost Li-Ion, Li-polymer, or LiFePO 4 battery charge controller with bidirectional power flow support. The device offers high-efficiency battery charging over a wide voltage range with accurate charge current and charge voltage regulation, in addition to automatic charge preconditioning, termination, and charge status indication. The device integrates all the loop compensation for the buck-boost converter, thereby providing a high density solution with ease of use. In reverse mode, the device draws power from the battery and regulates the input terminal voltage with an added constant current limit for protection, supporting USB-PD EPR power profile.
Besides the I 2C host-controlled charging mode, the device also supports standalone charging mode via resistor programmable limits. Input current, charge current and charge voltage regulation targets can be set via the ILIM_HIZ, ICHG and FB pins, respectively.
Technische Dokumentation
Typ | Titel | Datum | ||
---|---|---|---|---|
* | Data sheet | BQ25756E: Standalone/I2C Controlled, 1- to 7-Cell Bidirectional Buck-Boost Battery Charge Controller datasheet | PDF | HTML | 28 Nov 2023 |
EVM User's guide | BQ25756E Evaluation Module User's Guide | PDF | HTML | 17 Nov 2023 | |
Certificate | BQ25756EEVM EU Declaration of Conformity (DoC) | 31 Okt 2023 |
Design und Entwicklung
Weitere Bedingungen oder erforderliche Ressourcen enthält gegebenenfalls die Detailseite, die Sie durch Klicken auf einen der unten stehenden Titel erreichen.
BQ25756EEVM — BQ25756E Evaluierungsmodul für Stand-alone- oder I²C-gesteuerten bidirektionalen Abwärts-Aufwärts-Co
TI-CHARGER-GUI — GUI-Software zur Verwendung mit Evaluierungsmodulen für USB2ANY und Akkuladung
PMP41100 — 27 W USB Power Delivery-Ladegerät-Referenzdesign, nur Senke, für Akkus mit 4 bis 7 Zellen
Gehäuse | Pins | CAD-Symbole, Footprints und 3D-Modelle |
---|---|---|
VQFN (RRV) | 36 | Ultra Librarian |
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