BQ21061YFPR - 500mA 1-Cell Linear Charger 10nA Ship | TI
MPN: BQ21061YFPR ✓ Hoạt độngBQ21061YFPR Tóm tắt
A battery charger IC is a specialized power management device that converts an external DC source (USB, wireless, solar, or adapter) into a precise current/voltage profile tailored to a battery's chemistry, while protecting the cell from over-voltage, over-current, and thermal stress. Linear chargers - as opposed to switching chargers - dissipate the excess VIN-VBAT voltage as heat, which makes them simpler, smaller, and noise-free, but limits their use to sub-1A applications where the thermal budget is acceptable. The BQ21061 sits at the high end of TI's nano-power charger family: 10-nA ship-mode quiescent current extends shelf life for years on primary cells, and the integrated PMID power-path allows the system to boot and run from the input source even with a deeply discharged or absent battery.
Key features include programmable charge current up to 500 mA, ±0.5% battery regulation accuracy across -40°C to +85°C, dynamic power-path management (DPPM) that adjusts charge current to maintain PMID regulation, a programmable termination current down to 1 mA, and a thermal-regulation loop that automatically reduces charge current at high junction temperatures. The integrated 50-mA LDO can supply a clean rail to always-on peripherals (RTC, sensors, MCUs in sleep).
The BQ21061 uses a switched-mode-style architecture on the charger section with a high-side P-channel FET pass element, a precision bandgap reference, and an 8-bit DAC for current/voltage programming over I2C. The PMID rail is regulated via a separate linear LDO controller and supports dynamic load sharing between input source, battery, and system load, ensuring no back-feed to the USB port.
Typical applications include wearables (TWS earbuds, smartwatches, fitness bands), hearables, IoT sensor nodes, low-power medical patches, and any single-cell Li-Ion design that needs <100 nA quiescent current for multi-year storage. The wide VIN range (3.9V-6.45V) is fully compatible with USB, 5V adapters, and solar panels with MPPT front-ends.
Design trade-off: because the charger is linear, total power dissipation = (VIN - VBAT) × ICHG. At 500 mA and VIN = 5V with a 4.2V battery, the device dissipates ~0.4W; designers must ensure the DSBGA thermal pad is soldered to a copper pour with thermal vias to avoid triggering the thermal-regulation loop unnecessarily. I2C address (default 0x6B) must be checked against any other charger on the same bus.
This page synthesizes distributor pricing, drop-in alternatives from the BQ2106x family, and practical design notes not found in the manufacturer datasheet.
Bộ thay thế dễ dàng lắp đặt cho BQ21061YFPR — cùng gói, chân-to-chân tương thích. Các bộ phận yêu cầu hàn PCB bị loại trừ.
Các biến thể trong loạt này
Các mẫu cùng loạt có thể lắp đặt dễ dàng tương thích với BQ21061YFPR (cùng hình factor và footprint) — khác nhau ở Maximum Charge Current, Mounting Type, Package, Topology.
BQ21061YFPT
✅ Drop-InLiên hệ để biết giá
Xem tài liệu →BQ21062YFPR
✅ Drop-In📋 Tham chiếu thay thế (không có trong danh mục)
BQ21062YFPT
✅ Drop-In ⚠️ Thông số chưa được xác minh📋 Tham chiếu thay thế (không có trong danh mục)
BQ21060YFPR
✅ Drop-In📋 Tham chiếu thay thế (không có trong danh mục)
BQ25185YFPR
✅ Drop-In ⚠️ Thông số chưa được xác minh📋 Tham chiếu thay thế (không có trong danh mục)
MCP73831T-2ACI/OT
✅ Drop-In📋 Tham chiếu thay thế (không có trong danh mục)
BQ21061YFPR Thông số kỹ thuật
| Cấu trúc | Linear charger with integrated power-path (PMID) and LDO |
| Battery Chemistry | 1-cell Li-Ion / Li-Polymer |
| Input Voltage (VIN) | 3.9 V to 6.45 V |
| Maximum Charge Current | 500 mA (I2C programmable) |
| Battery Regulation Voltage | 3.5 V to 4.4 V (I2C programmable, 4.2 V default) |
| PMID Regulated System Voltage | VBAT + 0.1 V (load-share tracking) or input-regulated |
| Integrated LDO Output Current | Up to 50 mA |
| Quiescent Current (Ship Mode) | 10 nA typical |
| Battery Regulation Accuracy | ±0.5% (charge voltage) |
| Termination Current | Programmable, down to 1 mA |
| Charge Control Interface | I2C (default address 0x6B) |
| Thermal Regulation | Yes - auto-reduces charge current on die temp rise |
| Safety Features | OVP, OCP, thermal shutdown, JEITA/NTC support, watchdog |
| Hộp | 20-ball DSBGA (YFP), 1.6 mm × 1.6 mm |
| Nhiệt độ hoạt động | -40 °C to +85 °C |
| Kiểu lắp đặt | Surface Mount (chip-scale, requires reflow) |
| Cấp MSL | 1 (per JEDEC J-STD-020) |
| Trạng thái RoHS | Compliant |
| Lead-Free / Halogen-Free | Yes / Yes |
Cấu hình chân BQ21061YFPR
| Chân A1 | GND — Ground |
| Chân A2 | VIN — Input supply (USB/Adapter) |
| Chân A3 | PMID — Power-path regulated output to system |
| Chân A4 | BAT — Battery terminal |
| Chân A5 | SYS — System load connection |
| Chân B1 | TS — NTC thermistor input for JEITA |
| Chân B2 | INLIMIT — Input current limit set |
| Chân B3 | LDO_OUT — Integrated LDO output (up to 50 mA) |
| Chân B4 | LDO_EN — LDO enable input |
| Chân B5 | NC — Not connected (per datasheet) |
| Chân C1 | SCL — I2C clock |
| Chân C2 | SDA — I2C data |
| Chân C3 | INT — Interrupt output (active low) |
| Chân C4 | CE — Charge enable input |
| Chân C5 | PGND — Power ground |
| Chân D1 | STAT — Charge status output |
| Chân D2 | PGOOD — Power-good indicator |
| Chân D3 | SCL_TEST — Factory test - leave NC |
| Chân D4 | SDA_TEST — Factory test - leave NC |
| Chân D5 | THERMAL_PAD — Exposed die attach pad - must be soldered to GND copper pour |
Ứng dụng tiêu biểu
BQ21061YFPR phù hợp cho 6 Áp dụngs: TWS Earbuds and Hearables, Wearable Fitness Bands and Smartwatches, IoT Sensor Nodes with Energy Harvesting, Low-Power Medical Patches and Monitoring Devices, Smart Home Wireless Sensors (Zigbee/Thread/Matter), Portable Consumer Electronics (e-Readers, Remote Controls).
TWS Earbuds and Hearables
The BQ21061YFPR's 10-nA ship-mode quiescent current and integrated PMID power-path make it an ideal charger for true-wireless earbuds, where the cradle-insert event is rare and the cell spends months idle between uses. Its 500-mA charge ceiling is well-matched to typical 60-100 mAh earbud cells, supporting a full charge in under 30 minutes from a 5-V USB-C input. The integrated 50-mA LDO can supply the always-on Bluetooth SoC during deep sleep without an external regulator, cutting BOM by two components. Power dissipation at 5 V to 4.2 V × 500 mA is only 0.4 W, which the 1.6 mm × 1.6 mm DSBGA package can handle on a copper-pour PCB.
Được đề xuất
Wearable Fitness Bands and Smartwatches
Wearables demand multi-day battery life with always-on sensors (heart rate, SpO2, IMU), so the BQ21061YFPR's 10-nA ship mode preserves cell charge during shipping and storage. The PMID power-path allows the watch to boot from a USB source even with a deeply discharged or absent battery, which improves the first-time-out-of-box experience for users. The on-chip LDO delivers a clean rail to the always-on display driver or low-power MCU core. With a typical 200-400 mAh cell and 500 mA charge current, a full top-up takes roughly 1 hour, suitable for daily wear-and-charge cycles.
Được đề xuất
IoT Sensor Nodes with Energy Harvesting
Battery-powered IoT nodes that harvest energy from solar, thermal, or vibration sources need a charger that can survive long periods of partial state-of-charge. The BQ21061YFPR's 10-nA quiescent draw and dynamic power-path management (DPPM) ensure harvested energy flows preferentially to the load, with the cell making up any deficit. The integrated NTC/JEITA support protects cells from outdoor temperature extremes common in agricultural and environmental sensors. The I2C interface lets the host MCU monitor charge status, input-current limit, and PMID voltage without external ADC channels.
Được đề xuất
Low-Power Medical Patches and Monitoring Devices
Continuous-glucose monitors, drug-delivery patches, and ECG holters need a charger that draws essentially zero current when the patient is not actively charging. The BQ21061YFPR's 10-nA ship mode is unique among 500-mA chargers and prevents the cell from self-discharging through the IC. The ±0.5% battery-regulation accuracy ensures the medical cell is never overcharged, which is critical for cells rated to 4.20 V maximum. The PMID rail supports a regulated 4.4-V output, simplifying downstream LDO selection for analog-front-end ICs.
Được đề xuất
Smart Home Wireless Sensors (Zigbee/Thread/Matter)
Battery-powered door/window sensors, leak detectors, and occupancy sensors spend 99% of their life in deep sleep, drawing microamps. The BQ21061YFPR's 10-nA ship-mode draw is unmatched in its class and preserves coin-cell or Li-Po backup for 5-10 year deployments. The PMID power-path allows the sensor to operate from a USB power bank during commissioning even with the internal cell removed. The integrated 50-mA LDO can supply the always-on Zigbee/Thread radio MCU during sleep without needing a separate regulator.
Được đề xuất
Portable Consumer Electronics (e-Readers, Remote Controls)
Handheld devices like e-readers, game controllers, and TV remotes benefit from the BQ21061YFPR's small 1.6 mm × 1.6 mm footprint and integrated LDO that simplifies the BOM. The 500-mA charge current is well-matched to typical 1000-2000 mAh Li-Po cells used in these products, providing a 2-3 hour charge time. The PMID power-path ensures the device can be used while charging, with the system drawing from VIN first before the cell. I2C programmability lets designers tune charge profiles for different cell vendors without hardware changes.
Được đề xuất
Tóm tắt các sản phẩm được đề xuất
Dữ liệu tham khảo kỹ thuật cho BQ21061YFPR — so sánh, hướng dẫn thiết kế và thông tin tuân thủ.
Hướng dẫn chọn lựa
So sánh với các sản phẩm thay thế
| Tham số | Sản phẩm này | BQ21061YFPT | BQ21062YFPR | BQ21062YFPT | BQ21060YFPR | BQ25185YFPR | MCP73831T-2ACI/OT |
|---|---|---|---|---|---|---|---|
| Brand | Texas Instruments | Texas Instruments | Texas Instruments | Texas Instruments | Texas Instruments | Texas Instruments | Microchip Technology |
| Package | 20-ball DSBGA (YFP) 1.6x1.6 mm | 20-ball DSBGA (YFP) - same | 20-ball DSBGA (YFP) - same | 20-ball DSBGA (YFP) - same | 20-ball DSBGA (YFP) - same | 20-ball DSBGA (YFP) - same | SOT-23-5 - DIFFERENT |
| Maximum Charge Current | 500 mA | 500 mA | 500 mA | 500 mA | 1 A | 1 A | 500 mA |
| Integrated LDO | Yes (50 mA) | Yes (50 mA) | No | No | Yes | Yes | No |
| Power-Path / PMID | Yes (regulated PMID) | Yes | Yes | Yes | Yes | Yes | No |
| I2C Interface | Yes (addr 0x6B) | Yes | Yes | Yes | Yes | Yes | No (stand-alone) |
| JEITA / NTC Support | Yes | Yes | Yes | Yes | Yes | Yes | Optional via THERM pin |
Bảo phân biệt quan trọng
- 10-nA ship-mode quiescent current is best-in-class for 500-mA chargers (vsMCP73831T-2ACI/OT)
- Integrated 50-mA LDO eliminates an external regulator (vsBQ21062YFPR)
- Same YFP DSBGA footprint across BQ2106x family simplifies platform designs (vsBQ21060YFPR / BQ21062YFPR)
Ghi chú thiết kế
At maximum charge current of 500 mA with VIN = 5 V and a 4.2 V battery, the BQ21061YFPR dissipates approximately (5 - 4.2) × 0.5 = 0.4 W. The 20-ball DSBGA package must have its central thermal pad soldered to a copper pour with an array of thermal vias (typically 0.3 mm diameter, 1 mm pitch) to keep junction temperature below the 125 °C thermal-regulation threshold. Estimated: at theta-JA = 75 °C/W on a 4-layer JEDEC board, junction temperature rise is ~30 °C above ambient; with 2 oz copper and 9 thermal vias, theta-JA drops to ~50 °C/W.
Place the 1 µF input capacitor on VIN, a 1 µF capacitor on PMID, and a 10 µF capacitor on BAT as close to the BQ21061YFPR balls as possible, with the thermal-pad via array underneath. Use a 4-layer stack-up with the top layer reserved for the charger and battery routing, and a continuous GND plane on layer 2 to provide a low-impedance thermal path. Avoid routing noisy digital signals (I2C, GPIO) across the BAT or VIN traces; keep I2C traces short and add a 4.7 kΩ pull-up on both SCL and SDA.
Do not exceed the absolute maximum VIN of 7 V on the BQ21061YFPR (typical spec is 6.45 V); transients above 7 V can permanently damage the internal ESD clamp. When using NTC, connect a 10 kΩ B-constant 3380 thermistor directly to the TS ball - any series resistance above 100 Ω will shift the JEITA thresholds. In I2C designs, ensure the MCU's I2C lines are not pulled low during shutdown; the BQ21061YFPR requires a clean SCL/SDA idle-high to wake from ship mode. Estimated: a typical 4.7 kΩ pull-up at 3.3 V logic is sufficient for bus speeds up to 400 kHz.
Thông tin tuân thủ
RoHS/REACH compliant per TI product page; MSL-1 per JEDEC J-STD-020; not AEC-Q100 qualified - for automotive applications use a Q-1 suffix variant or larger QFN package family.
