BQ25770G
- TI patented quasi dual phase buck-boost narrow voltage DC (NVDC) charger for USB-C Extended Power Range (EPR) interface platform
- 3.5V to 40V input range to charge 2- to 5-cell battery
- Charge current up to 16.3A/30A based on 5mΩ/2mΩ sensing resistor
- Input current limit up to 8.2A/16.4A based on 10mΩ/5mΩ sensing resistor
- Support USB 2.0, USB 3.0, USB 3.1, USB-C power delivery and extended power range input current setting
- Input Current Optimizer (ICO) to extract max input power without overloading the adapter
- Integrated Fast Role Swap (FRS) feature following USB-PD specification
- Seamless transition between quasi dual phase buck, buck-boost, and boost operations
- Input current and voltage regulation (IINDPM and VINDPM) against source overload
- Battery supplements system when adapter is fully loaded
- TI patented dual ramdom spread spectrum (DRSS) for meeting IEC-CISPR 32 EMI specification
- TI patented Pass Through Mode (PTM) for >99% efficiency and battery fast charging support
- IMVP8/IMVP9 compliant system features for Intel platform
- Enhanced Vmin Active Protection (VAP) mode supplements battery from input capacitors during system peak power spike following latest Intel specification
- Comprehensive PROCHOT profile
- Two level discharge current limit PROCHOT profile to avoid battery wear out
- System power monitor (PSYS)
- Input and battery current monitor through dedicated pins
- Integrated 16-bit ADC to monitor voltage, current and power
- Battery MOSFET ideal diode operation in supplement mode
- Power up USB port from battery (USB OTG)
- 3V to 5V OTG
- Output current limit up to 3A based on 10mΩ sensing resistor
- 600kHz/800kHz programmable switching frequency
- SMBus host control interface for flexible system configuration
- High accuracy for the regulation and monitor
- ±0.5% Charge voltage regulation
- ±2% Charge current regulation
- ±2% Input current regulation
- ±2% Input/charge current monitor
- Safety
- Thermal regulation and thermal shutdown
- Input, system, battery overvoltage protection
- Input, MOSFET, inductor overcurrent protection
- Package: 36-Pins 4.0mm × 5.0mm WQFN
The BQ25770G is a synchronous NVDC buck-boost battery charge controller to charge a 2- to 5-cell battery from a wide range of input sources including USB adapter, extended power range (EPR) USB-C Power Delivery (PD) sources, standard power range (SPR) USB-C Power Delivery (PD) sources and traditional adapters. The device offers a low component count, high efficiency solution for space constrained, 2- to 5-cell battery charging applications.
The NVDC configuration allows the system to be regulated based on battery voltage, but not drop below system minimum voltage. The system keeps operating even when the battery is completely discharged or removed. When load power exceeds input source rating, the battery goes into supplement mode and prevents the system from crashing.
During power up, the charger sets the converter to a buck, boost, or buck-boost configuration based on the input source and battery conditions. The charger seamlessly transits between the buck, boost, and buck-boost operation modes without host control. The TI patented quasi dual phase converter can interleave dual phase under high power buck mode helping thermal distribution and reduce each inductor size. At same time it only needs two boost side switching MOSFETs to save overall system area and cost due to limited power operation under boost mode.
In the absence of an input source, the BQ25770G supports the USB On-the-Go (OTG) function from a 2- to 5-cell battery to generate an adjustable 3V to 5V output on VBUS with 20mV resolution.
When only a battery powers the system and no external load is connected to the USB OTG port, the BQ25770G implements the latest Intel Vmin Active Protection (VAP) feature, in which the device charges up the VBUS voltage from the battery to store some energy in the input decoupling capacitors. During a system peak power spike, the energy stored in the input capacitors supplements the system, to prevent the system voltage from dropping below the minimum system voltage and causing a system crash.
The BQ25770G monitors adapter current, battery current, and system power. The flexibly programmable PROCHOT output goes directly to the CPU for throttling back when needed.
The latest version of the USB-C PD specification includes Fast Role Swap (FRS) to ensure power role swapping occurs in a timely fashion so that the device(s) connected to the dock can avoid experiencing momentary power loss or glitching. This device integrates FRS in compliance with the PD specification.
TI patented switching frequency dithering pattern can significantly reduce EMI noise over the whole conductive EMI frequency range (150kHz to 30MHz). Multiple dithering scale options are available and provide flexibility for different applications. The ditherring feature greatly simplify EMI noise filter design.
The charger operate in the TI patented Pass Through Mode (PTM) to improve efficiency over the full load range. In PTM, input power directly pass through the charger to the system. Switching losses of the MOSFETs and inductor core loss can be saved thus achieving high efficiency operation.
The BQ25770G is available in a 36-pin 4mm × 5mm WQFN package.
技術文件
| 類型 | 標題 | 日期 | ||
|---|---|---|---|---|
| * | Data sheet | BQ25770G 40V, SMBus, 2- to 5-Cell, Narrow VDC Quasi Dual Phase Buck-Boost Battery Charge Controller for GaN HEMT With System Power Monitor and Processor Hot Monitor datasheet | PDF | HTML | 2024年 4月 30日 |
| EVM User's guide | BQ2577xGEVM Evaluation Module User's Guide | PDF | HTML | 2024年 5月 1日 |
設計與開發
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BQ25770GEVM — BQ25770G 評估模組
| 封裝 | 針腳 | CAD 符號、佔位空間與 3D 模型 |
|---|---|---|
| WQFN (REE) | 36 | Ultra Librarian |
訂購與品質
- RoHS
- REACH
- 產品標記
- 鉛塗層/球物料
- MSL 等級/回焊峰值
- MTBF/FIT 估算值
- 材料內容
- 認證摘要
- 進行中持續性的可靠性監測
- 晶圓廠位置
- 組裝地點
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