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BQ24765RUVR

TI SMBus buck battery charger, 7-24V in, 2-4 cell Li+, 10A, integrated MOSFETs, 700kHz, 34-VQFN

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Pieza del fabricante：

BQ24765RUVR

Paquete：

34-VQFN (7 x 3.5 x 0.9 mm)

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Descripción

Productos

The BQ24765RUVR from Texas Instruments is a high-efficiency synchronous buck battery charger IC with two integrated 30 mΩ NMOS power MOSFETs. Controlled via SMBus, it charges 2-4 series Li+ cells (and other chemistries) at up to 10 A, targeting notebook computers, portable terminals, and battery backup systems.

Especificaciones

Input Voltage 7V to 24V (30V abs max)
Charge Voltage 1.024V to 19.2V (DAC programmable)
Charge Current Up to 10 A (8.064 A DAC max)
Switching Frequency 700 kHz
MOSFETs 2x 30 mΩ integrated NMOS
Efficiency >95%
Interface SMBus (I2C-compatible)
Cell Count 2, 3, or 4 series Li+
Temperatura de funcionamiento -40°C to +125°C (junction)
Paquete 34-pin VQFN (7 x 3.5 mm)

Características

  • Two integrated 30 mΩ NMOS power MOSFETs for >95% efficiency and low BOM count
  • 700 kHz switching frequency allows small 5×5 mm inductor for compact design
  • SMBus-programmable charge voltage (0.5% accuracy), charge current (3% accuracy), and input current limit (3% accuracy)
  • Dynamic Power Management (DPM) prevents adapter overloading
  • Thermal regulation loop reduces charge current when junction reaches 120°C

Aplicaciones

  • Notebook and ultra-mobile computer battery charging
  • Portable data-capture terminals and barcode scanners
  • Portable medical diagnostic equipment
  • Battery bay chargers and docking stations
  • Battery backup and UPS systems

The BQ24765RUVR is a Texas Instruments high-efficiency synchronous buck battery charger with two integrated 30 mΩ NMOS power MOSFETs and an integrated input current comparator. Controlled via SMBus, it charges 2-4 series Li-Ion cells at up to 10 A with ±0.5% charge voltage accuracy and ±3% charge current accuracy. The 700 kHz switching frequency allows compact inductor selection, while Dynamic Power Management (DPM) and thermal regulation ensure safe operation across all conditions.

The BQ24765 operates as a synchronous buck converter with SMBus control: (1) Power Stage — two integrated NMOS FETs (30 mΩ each) switch at 700 kHz to step down the adapter voltage to the battery charge voltage. Type III compensation supports ceramic output capacitors. Adaptive dead-time control achieves 99.5% effective duty cycle; (2) SMBus Control — the host programs ChargeVoltage() (1.024-19.2V), ChargeCurrent() (128 mA-8.064 A), and InputCurrent() (256 mA-11.008 A) DAC registers with high resolution; (3) Dynamic Power Management — DPM reduces charge current when total input current approaches the adapter limit, ensuring adapter is never overloaded; (4) Thermal Regulation — when junction temperature reaches 120°C, charge current is automatically reduced to maintain safe operating temperature.

Grupo Pin Función
DCINA, DCINB Adapter input power and sense
ACIN Adapter detect voltage divider input
ACOK Adapter present open-drain output
BATP, VFB Battery voltage sense and feedback
SRP, SRN Charge current sense resistor inputs
VDDP, VREF 5V gate drive and 3.3V reference outputs
BOOT, SW High-side FET bootstrap and switch node
SDA, SCL SMBus data and clock
CE Charge enable input
GND, PGND Signal and power ground
  • Notebook PC battery charger with 19V adapter, 3-cell 12.6V charging at 4 A
  • Ultra-mobile laptop with USB-C PD 20V input, 4-cell 16.8V at 3 A
  • Portable medical cart charger with multi-chemistry (Li-Ion/LiFePO4) support
  • Docking station battery bay charger for fleet handheld terminals
  • Battery backup system with 24V adapter charging 4-cell 16.8V at 5 A
Modelo Fabricante Diferencia clave
BQ24770RUYR TI Recommended substitute, newer
BQ25720RSNR TI Narrower Vout, NVDC architecture
BQ24780I TI Hybrid power boost charger
ISL9238 Renesas Competitive buck-boost charger
MP2651 MPS Multi-cell buck charger alternative
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