BQ21061YFPR - 500mA 1-Cell Linear Charger 10nA Ship | TI
部品番号: BQ21061YFPR ✓ 生産中| 数量 | 単価 | 小計 |
|---|---|---|
| 1 | $1.75 | $1.75 |
| 10 | $1.55 | $15.50 |
| 100 | $1.32 | $132.00 |
| 500 | $1.14 | $570.00 |
| 1,000 | $0.99 | $990.00 |
| 3,000 | $0.86 | $2,580.00 |
BQ21061YFPR 概要
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.
ドロップイン代替品: BQ21061YFPR — 同一パッケージでピン互換。PCBの作り直しが必要な異なるパッケージの部品は除外されています。
このシリーズのバリエーション
同一シリーズでドロップイン互換のモデル: BQ21061YFPR （同一形状・フットプリント） — 相違点: Maximum Charge Current, Mounting Type, Package, Topology.
クイック比較ツール — 並列比較する代替部品を選択:
BQ21061YFPT
✅ ドロップイン✓ 在庫あり
$1.4 / 個
データシートを見る →BQ21062YFPR
✅ ドロップイン📋 参考代替品（カタログ未掲載）
BQ21062YFPT
✅ ドロップイン ⚠️ 仕様未検証📋 参考代替品（カタログ未掲載）
BQ21060YFPR
✅ ドロップイン📋 参考代替品（カタログ未掲載）
BQ25185YFPR
✅ ドロップイン ⚠️ 仕様未検証📋 参考代替品（カタログ未掲載）
MCP73831T-2ACI/OT
✅ ドロップイン📋 参考代替品（カタログ未掲載）
BQ21061YFPR 仕様
| トポロジー | 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 |
| パッケージ | 20-ball DSBGA (YFP), 1.6 mm × 1.6 mm |
| 動作温度 | -40 °C to +85 °C |
| 実装タイプ | Surface Mount (chip-scale, requires reflow) |
| MSLレベル | 1 (per JEDEC J-STD-020) |
| RoHS ステータス | Compliant |
| Lead-Free / Halogen-Free | Yes / Yes |
BQ21061YFPR ピン構成
| ピン A1 | GND — Ground |
| ピン A2 | VIN — Input supply (USB/Adapter) |
| ピン A3 | PMID — Power-path regulated output to system |
| ピン A4 | BAT — Battery terminal |
| ピン A5 | SYS — System load connection |
| ピン B1 | TS — NTC thermistor input for JEITA |
| ピン B2 | INLIMIT — Input current limit set |
| ピン B3 | LDO_OUT — Integrated LDO output (up to 50 mA) |
| ピン B4 | LDO_EN — LDO enable input |
| ピン B5 | NC — Not connected (per datasheet) |
| ピン C1 | SCL — I2C clock |
| ピン C2 | SDA — I2C data |
| ピン C3 | INT — Interrupt output (active low) |
| ピン C4 | CE — Charge enable input |
| ピン C5 | PGND — Power ground |
| ピン D1 | STAT — Charge status output |
| ピン D2 | PGOOD — Power-good indicator |
| ピン D3 | SCL_TEST — Factory test - leave NC |
| ピン D4 | SDA_TEST — Factory test - leave NC |
| ピン D5 | THERMAL_PAD — Exposed die attach pad - must be soldered to GND copper pour |
主な用途
BQ21061YFPR の用途: 6 件s: 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.
おすすめ
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.
おすすめ
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.
おすすめ
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.
おすすめ
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.
おすすめ
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.
おすすめ
おすすめ製品の概要
エンジニアリング参考データ: BQ21061YFPR — 比較、設計ガイダンス、コンプライアンス情報。
選定ガイド
代替品との比較
| パラメータ | この製品 | 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 |
主な差別化要因
- 10-nA ship-mode quiescent current is best-in-class for 500-mA chargers （vs MCP73831T-2ACI/OT)
- Integrated 50-mA LDO eliminates an external regulator （vs BQ21062YFPR)
- Same YFP DSBGA footprint across BQ2106x family simplifies platform designs （vs BQ21060YFPR / BQ21062YFPR)
設計ノート
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.
コンプライアンス情報
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.
