Overview
The BQ24640RVAT from Texas Instruments is a highly integrated, synchronous switched-mode super capacitor charge controller. This device is designed to charge super capacitors with high efficiency and accuracy, featuring a constant-frequency synchronous PWM controller. It supports charging super capacitors from 0 V in two phases: constant current (CC) and constant voltage (CV), with precise charge current and voltage regulation.
Key Specifications
| Specification | Value |
|---|---|
| Input Voltage Range (VCC) | 5 V to 28 V |
| Output Voltage Range | 2.1 V to 26 V |
| Charge Current Regulation | ±3% |
| Charge Voltage Regulation | ±0.5% |
| Maximum Charge Current | Up to 10 A |
| Efficiency | Over 90% |
| Switching Frequency | 600 kHz |
| Package Type | 16-VQFN |
| Operating Temperature Range | -40°C to 85°C |
| Driver Dead Time | 30 ns |
| Effective Duty Cycle | Up to 99.5% |
| Off-State Input Quiescent Current | <1.5 mA |
| Off-State Super Capacitor Discharge Current | <15 µA |
Key Features
- High-efficiency synchronous switched-mode charger
- Constant-frequency PWM controller
- CC/CV charge profile from 0 V without precharge
- Internal loop compensation and digital soft start
- Input overvoltage protection and thermal shutdown
- Capacitor temperature sensing with hot and cold charge suspend
- Status outputs for charge and adapter status
- Charge enable pin and automatic sleep mode for low power consumption
Applications
- Memory backup systems
- Industrial UPS systems and power transient buffering
- Bridge power to buffer the battery
Q & A
- What is the input voltage range of the BQ24640RVAT?
The input voltage range is from 5 V to 28 V. - What is the maximum charge current supported by the BQ24640RVAT?
The maximum charge current is up to 10 A. - What are the charge phases supported by the BQ24640RVAT?
The device supports constant current (CC) and constant voltage (CV) charge phases. - Does the BQ24640RVAT have temperature sensing capabilities?
Yes, it has capacitor temperature sensing with hot and cold charge suspend. - What is the efficiency of the BQ24640RVAT?
The efficiency is over 90%. - What is the switching frequency of the BQ24640RVAT?
The switching frequency is 600 kHz. - What is the package type of the BQ24640RVAT?
The package type is 16-VQFN. - What are the status outputs provided by the BQ24640RVAT?
The device provides status outputs for charge and adapter status. - Does the BQ24640RVAT have an automatic sleep mode?
Yes, it has an automatic sleep mode for low power consumption. - What is the operating temperature range of the BQ24640RVAT?
The operating temperature range is from -40°C to 85°C.
