产品概览
The BQ24075TRGTR is a 1.5A single-cell Li-Ion/Li-Polymer battery charger IC from Texas Instruments, featuring a USB-compatible input with dynamic power-path management. It supports USB and AC adapter inputs simultaneously, prioritizing the adapter. The device integrates a power FET, current sensing, and thermal regulation in a compact QFN package, requiring minimal external components for a complete charging solution.
主要规格
| Battery Chemistry | Li-Ion / Li-Polymer (single cell) |
| Charge Current | Up to 1.5A (programmable) |
| 输入电压范围 | 4.35V to 6.4V |
| Charge Voltage | 4.2V ±0.5% |
| Precharge Current | 10% of fast charge current |
| Termination Current | 10% of fast charge current |
| Operating Current | 1.5mA (typical) |
| Input Current Limit | 100mA / 500mA USB / no limit |
| Thermal Regulation | 120°C junction |
| 包装 | 16-pin QFN (3x3mm) |
| 工作温度 | -40°C to +85°C |
特点
- 1.5A maximum charge current with single resistor programming
- Dynamic power-path management powers system while charging
- Dual input (USB + AC adapter) with automatic selection
- USB input current limiting: 100mA, 500mA, or no limit
- 4.2V charge voltage with ±0.5% accuracy
- Precharge, constant-current, and constant-voltage phases
- Charge termination and auto-recharge
- Integrated thermal regulation reduces charge current at 120°C
- Battery temperature sensing (NTC thermistor input)
Charge status outputs for LED or host monitoring 应用
- Smartphones and tablets
- Portable medical devices
- Handheld industrial instruments
- Bluetooth headsets and wearables
- USB-powered consumer electronics
- Portable GPS and navigation devices
The BQ24075TRGTR is a highly integrated 1.5A single-cell Li-Ion/Li-Polymer battery charger from Texas Instruments, featuring dynamic power-path management that simultaneously powers the system and charges the battery. It accepts both USB and AC adapter inputs, automatically selecting the higher-priority adapter source. USB input current can be limited to 100mA or 500mA to comply with USB specifications, or set to no limit for AC adapter operation. The charge current is programmed with a single external resistor. The three-phase charging profile (precharge, constant-current, constant-voltage) ensures safe and complete battery charging with ±0.5% voltage accuracy.
The BQ24075 operates through three charging phases: (1) Precharge: When the battery voltage is below the precharge threshold (typically 2.5V), a reduced current (10% of fast charge) safely charges deeply depleted cells. (2) Constant Current (CC): Once above the precharge threshold, the full programmed fast-charge current is applied. (3) Constant Voltage (CV): When the battery reaches 4.2V, the charger switches to CV mode, gradually reducing current until the termination threshold (10% of fast charge) is reached. The dynamic power-path management ensures the system load is always prioritized; if the input source cannot supply both system load and charge current, the charge current is reduced automatically. Thermal regulation at 120°C reduces charge current to prevent overheating.
针脚 名称 说明 1 IN Input power (USB/adapter, 4.35-6.4V) 2 PG Power good status output (open-drain) 3 CE Chip enable (active high) 4 ISET Charge current set resistor 5 TS Temperature sense (NTC thermistor input) 6 CHG Charge status output (open-drain, LED driver) 7 EN2 Input current limit select (with EN1) 8 EN1 Input current limit select 9 出局 System output (power path) 10 BAT Battery connection 11 TS2 Secondary temperature sense 12-13 接地 地面 14 ILIM Input current limit programming 15-16 IN Input power (parallel with pin 1) 垫子 热能 Thermal pad (connect to GND) - USB-Powered Portable Device: Connect USB VBUS to IN and the system load to OUT. The BQ24075 powers the system from USB while charging the battery. When USB is disconnected, the battery seamlessly powers the system through OUT. EN1/EN2 pins set USB current limit to 100mA or 500mA per USB specification.
- Dual-Source Charging: Connect both USB and a 5V AC adapter through a diode-OR circuit to the IN pin. The adapter naturally takes priority due to its higher voltage. The device automatically selects the strongest source, and the unlimited current mode charges at the full programmed rate when an adapter is connected.
- Medical Wearable: The NTC thermistor input monitors battery temperature, suspending charge if the battery is outside the 0°C to 45°C safe charging window. The small 3x3mm QFN package and minimal external component count fit within the tight space constraints of wearable medical devices.
模型 Current 特点 主要区别 BQ24072 1.5A Power path, USB Same family, different current limits BQ24195 2.5A Buck charger, OTG Higher current, USB OTG boost MCP73871 1.2A Power path, USB Microchip alternative MAX8903B 2A Dual input, power path ADI/Maxim, higher current 推荐部件
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Quality is the core foundation of our long-term global cooperation. With over 20 years of experience in the electronic component industry, Materialparts has built a strict and standardized quality management system covering component sourcing, incoming inspection, full-batch testing, packaging and delivery. We are committed to delivering 100% genuine, high-reliability electronic components for industrial control, automotive electronics, consumer electronics and medical device industries, and fully safeguarding your production and R&D projects.
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Materialparts is a professional electronic component supplier based in Shenzhen, China, with over 20 years of global trading experience. We integrate component procurement, quality inspection, technical support, customized packaging, and global delivery services to provide one-stop supply chain solutions. Our business covers industrial control, automotive electronics, consumer electronics, medical devices and other industries. We always adhere to genuine sources, stable supply and considerate after-sales service.
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