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BQ25101YFPR

250mA Li-Ion linear charger, 4.2V, 75nA leakage, JEITA, 6-DSBGA 1.6x0.9mm

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Manufacturer Part：

BQ25101YFPR

Package：

6-DSBGA / YFP (1.6 x 0.9 x 0.5mm, 0.5mm pitch)

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Description

Product Overview

The BQ25101YFPR from Texas Instruments is a 250mA single-cell Li-Ion/Li-Polymer linear battery charger in a tiny 6-DSBGA (1.6 x 0.9mm) package. It features 75nA max battery leakage current, 4.2V charge voltage with 1% accuracy, programmable charge current from 10mA to 250mA, JEITA temperature compliance, and 30V input rating with 6.5V OVP.

Key Specifications

Battery Chemistry Li-Ion / Li-Polymer
Charge Voltage 4.2V (1% accuracy)
Fast Charge Current 10mA to 250mA (programmable)
Termination Current Down to 1mA (programmable)
Battery Leakage Current 75nA max (battery only)
Input Voltage Rating 30V max (6.5V OVP)
Operating Input Range 4.45V to 6.5V
Pre-charge Current Programmable (10% to 100% of fast charge)
JEITA Temperature Compliant (NTC thermistor input)
Safety Timer 10-hour fixed
Thermal Regulation 125°C junction (reduces charge current)
Package 6-DSBGA (1.6 x 0.9mm, 0.5mm pitch)
Operating Temperature 0°C to +125°C

Features

  • 1% charge voltage accuracy at 4.2V
  • 10% charge current accuracy
  • Ultra-low 10mA to 250mA programmable fast charge current
  • Minimum 1mA termination current
  • Ultra-low battery leakage: 75nA max
  • Programmable pre-charge and termination thresholds
  • 30V input voltage rating with 6.5V OVP
  • Input voltage dynamic power management (DPM)
  • 125°C thermal regulation; 150°C thermal shutdown
  • JEITA temperature compliance with NTC thermistor
  • OUT short-circuit protection and ISET short detection
  • Charge status indicator output
  • Tiny 1.6 x 0.9mm DSBGA package

Applications

  • Smartwatches and fitness bands
  • True wireless earbuds charging case
  • Bluetooth headsets and wearables
  • Low-power handheld medical devices
  • IoT sensor nodes with Li-Ion battery

The BQ25101YFPR from Texas Instruments is a highly integrated single-cell Li-Ion/Li-Polymer linear charger in an ultra-small 1.6 x 0.9mm DSBGA package. It charges at up to 250mA with 1% voltage accuracy at 4.2V, while drawing only 75nA max from the battery when not charging. The device supports three charging phases (pre-charge, constant current, constant voltage) with programmable current levels and minimum 1mA termination. JEITA temperature compliance via an NTC thermistor ensures safe charging across temperature ranges. The 30V input rating with 6.5V OVP supports low-cost unregulated adapters.

The BQ25101 operates as a linear charger with three phases. When a valid input supply is detected (above UVLO and below OVP), the device performs ISET and OUT short checks. If the battery voltage is below the LOWV threshold, pre-charge begins at a programmable fraction of the fast-charge current. Once the battery exceeds LOWV, constant-current fast charging begins at the current programmed by the ISET resistor. When the battery reaches 4.2V, the constant-voltage phase holds the battery at the regulation voltage while current tapers. Charging terminates when the current drops below the termination threshold (half the pre-charge current). The JEITA-compliant NTC input adjusts charge parameters: cold conditions halve the fast-charge current, while hot conditions reduce the regulation voltage to 4.06V. Thermal regulation at 125°C reduces charge current to prevent overheating.

Pin Name Type Function
A1 OUT Power Battery connection / charge output
A2 IN Power Input supply (4.45V to 6.5V)
B1 ISET Analog Charge current set resistor / pre-charge-termination
B2 GND Power Ground
C1 NTC Input Battery temperature sense (JEITA)
C2 PG Output Power good / charge status indicator
  • Smartwatch and fitness band battery charging from USB
  • True wireless earbud charging case with 75nA battery standby
  • Bluetooth headset wearable charger with JEITA safety
  • Portable medical sensor Li-Ion charging with 1mA termination
  • IoT device coin-cell or small Li-Po battery management
Manufacturer Part Number Package Notes
TI BQ25100YFPR DSBGA-6 4.2V without JEITA PG output
TI BQ25101HYFPR DSBGA-6 4.35V high-voltage chemistry
TI BQ25120YFPR DSBGA-9 With LDO and load switch
onsemi MC34671AEF DFN-8 1A charger, 4.2V/4.35V
Microchip MCP73831T-2ACI/OT SOT-23-5 500mA, 4.2V, simpler charger
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Quality Assurance

All electronic components we source from our partnered supply chains go through strict incoming inspections.Through careful testing, we ensure everything delivered to customers is genuine original parts and meets quality requirements.In addition, we keep complete inspection records to make the entire supply chain process clear and traceable.

Certification
We have obtained a number of professional certifications and built our own professional testing laboratory.This ensures that every product we deliver to our customers meets the highest quality requirements.We conduct tests in strict accordance with procedures to ensure stable product quality and accurate parameters.To guarantee genuine original parts, we also cooperate with reliable third-party testing institutions for strict quality inspection.We always attach great importance to quality and fully comply with industry standards, relevant regulations, and ISO 9001:2015 requirements.

Shipping & Payment

All electronic components we source from our partnered supply chains go through strict incoming inspections.Through careful testing, we ensure everything delivered to customers is genuine original parts and meets quality requirements.In addition, we keep complete inspection records to make the entire supply chain process clear and traceable.

Certification
We have obtained a number of professional certifications and built our own professional testing laboratory.This ensures that every product we deliver to our customers meets the highest quality requirements.We conduct tests in strict accordance with procedures to ensure stable product quality and accurate parameters.To guarantee genuine original parts, we also cooperate with reliable third-party testing institutions for strict quality inspection.We always attach great importance to quality and fully comply with industry standards, relevant regulations, and ISO 9001:2015 requirements.

Service & Packaging

All electronic components we source from our partnered supply chains go through strict incoming inspections.Through careful testing, we ensure everything delivered to customers is genuine original parts and meets quality requirements.In addition, we keep complete inspection records to make the entire supply chain process clear and traceable.

Certification
We have obtained a number of professional certifications and built our own professional testing laboratory.This ensures that every product we deliver to our customers meets the highest quality requirements.We conduct tests in strict accordance with procedures to ensure stable product quality and accurate parameters.To guarantee genuine original parts, we also cooperate with reliable third-party testing institutions for strict quality inspection.We always attach great importance to quality and fully comply with industry standards, relevant regulations, and ISO 9001:2015 requirements.

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