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BQ24600RVAR

1.2MHz sync buck Li-Ion/Li-Po charger, 1-6S, 10A, VQFN-16, stand-alone, thermistor monitor

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Manufacturer Part：

BQ24600RVAR

Package：

VQFN-16 (3.50 x 3.50 x 0.95 mm, exposed pad)

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Description

Product Overview

The BQ24600RVAR from Texas Instruments is a stand-alone synchronous switch-mode battery charger controller for Li-Ion/Li-Polymer in a VQFN-16 package. It supports 1S-6S cells with up to 10A charge current and 5V-28V input range.

Key Specifications

Battery Chemistry Li-Ion / Li-Polymer
Cell Count 1S to 6S
Input Voltage 5 V to 28 V
Charge Current Up to 10 A (programmable)
Charge Voltage Accuracy +/-0.5%
Switching Frequency 1.2 MHz
Operating Temperature -40C to +85C

Features

  • 1.2MHz synchronous buck converter for high efficiency charging
  • Three-phase charging: preconditioning, constant current, constant voltage
  • +/-0.5% charge voltage accuracy and +/-3% charge current accuracy
  • Internal loop compensation and soft start for easy design
  • Battery thermistor monitoring (TS pin) for hot/cold charge suspend
  • Input overvoltage, battery overvoltage, and short circuit protection

Applications

  • Portable equipment and handheld terminals
  • Industrial and medical battery-powered systems
  • Power tools and solar-charged battery packs
  • Mobile internet devices and ultra-mobile PCs

The BQ24600RVAR from Texas Instruments is a highly integrated stand-alone synchronous switch-mode battery charge controller for Li-Ion and Li-Polymer batteries in a 16-pin VQFN (3.5×3.5mm) package. The device implements a constant-frequency synchronous PWM buck converter operating at 1.2MHz, supporting 1S to 6S battery configurations with input voltages from 5V to 28V and programmable charge current up to 10A. Charging follows three phases: preconditioning (trickle charge for deeply discharged cells), constant current (fast charge), and constant voltage (taper charge). Charge termination occurs when the current drops below a minimum threshold. The charge voltage regulation accuracy of +/-0.5% and charge current accuracy of +/-3% ensure safe and precise battery charging. The device features internal loop compensation and internal soft start, minimizing external component count. Safety features include input overvoltage protection, battery overvoltage protection, charge overcurrent protection, battery short protection, thermal shutdown, and a built-in safety timer. The TS (thermistor sense) pin monitors battery temperature via an NTC thermistor and suspends charging when the battery is too hot or too cold. Status outputs indicate adapter presence and charger operation state. The low quiescent current (less than 1.5mA off-state input, less than 15uA off-state battery discharge) minimizes battery drain when the charger is inactive.

The BQ24600RVAR controls a synchronous buck converter to regulate battery charge current and voltage. (1) Power Stage: The controller drives external high-side and low-side N-channel MOSFETs in a synchronous buck configuration. The 1.2MHz switching frequency enables small inductor and capacitor values. The 30ns driver dead-time and 99.5% maximum duty cycle ensure high efficiency across the input voltage range. (2) Charging Phases: For deeply discharged batteries (below VBATLOW threshold), the preconditioning phase applies a reduced current (typically C/10) to safely recover the cells. Once the battery voltage rises above VBATLOW, the constant current (CC) phase applies the full programmed charge current. When the battery reaches the regulation voltage, the constant voltage (CV) phase tapers the current. Charging terminates when the current drops below the termination threshold. (3) Current Sensing: An external sense resistor between SRP and SRN pins measures the charge current. The voltage across the sense resistor is compared to the programmed current set point. (4) Voltage Regulation: A resistor divider from the battery to the VFB pin sets the regulation voltage. The internal reference achieves +/-0.5% accuracy. (5) Safety: The TS pin compares the NTC thermistor voltage against internal thresholds for hot/cold detection. The built-in safety timer provides a backup charge termination if the normal termination fails.

Pin Name Type Function
1 VCC Power IC supply (via 10ohm resistor from input)
2 CE Input Charge enable (active high)
3 STAT Output Charge status (open-drain)
4 TS Input Battery thermistor sense
5 PG Output Power good status (open-drain)
6 SRP Input Current sense resistor positive
7 SRN Input Current sense resistor negative
8-9 BTST/PH Power Bootstrap / switch node
10 HIDRV Output High-side MOSFET gate drive
11 LODRV Output Low-side MOSFET gate drive
12 VFB Input Battery voltage feedback
13 ISET1 Input Charge current set resistor
14 ISET2 Input Input current limit set
15 REGN Output Internal 6V regulator output
16 GND Ground Ground
  • Portable equipment and handheld terminals with 1-6S Li-Ion charging
  • Industrial and medical battery-powered systems with thermistor monitoring
  • Power tools and solar-charged battery packs at up to 10A
  • Mobile internet devices and ultra-mobile PCs with 1.2MHz compact design
Manufacturer Part Number Package Notes
TI BQ24610RVAR VQFN-16 Similar, dynamic power management
TI BQ24725ARGRR VQFN-20 I2C controlled, 1-4S
MPS MP2617GR-Z QFN-20 1-6S, 3A, stand-alone
TI BQ24735RGRR VQFN-20 I2C, NVDC, 1-4S
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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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Shipping & Payment

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Service & Packaging

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Contact Information

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Email: info@materialparts.com
Tel / WhatsApp: +86 13760382860
Address: Room 2919, Guoli Building, Huaqiang North, Futian District, Shenzhen, Guangdong, China
 

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