Overview
The Texas Instruments BQ24070RHLTG4 is a highly integrated single-chip Li-ion linear charger and system power-path management device. It is designed for space-limited portable applications, such as smart phones, PDAs, MP3 players, digital cameras, and handheld devices. This device offers DC supply (AC adapter) power-path management with autonomous power-source selection, power FETs, and current sensors, ensuring continuous power to the system from either the AC adapter or battery sources.
Key Specifications
| Parameter | Min | |||
|---|---|---|---|---|
| Supply Voltage (VIN) | 4.35 | - | 16 | V |
| Input Current | - | - | 2 | A |
| Operating Junction Temperature Range | -40 | - | 125 | °C |
| Output Regulation Voltage | 4.4 | - | 4.5 | V |
| DPPM Set Point Voltage | 2.6 | - | 3.8 | V |
| DPPM Current Source | 95 | - | 100 | μA |
| IN-to-OUT Dropout Voltage | 300 | - | 475 | mV |
| BAT-to-OUT Dropout Voltage | 40 | - | 100 | mV |
Key Features
- Small Package Size: 3.5-mm × 4.5-mm VQFN package, suitable for space-limited portable applications.
- Dynamic Power-Path Management (DPPM): Allows the AC adapter to simultaneously power the system and charge the battery, reducing charge and discharge cycles on the battery.
- Autonomous Power Source Selection: Automatically selects between the AC adapter and battery as the power source.
- Power Supplement Mode: Enables the battery to supplement the AC input current, ensuring continuous system operation even with an absent or defective battery pack.
- Thermal Regulation for Charge Control: Regulates charge current based on temperature to prevent overheating.
- Charge Status Outputs: Provides LED or system interface outputs to indicate charge and fault conditions.
- Reverse Current, Short-Circuit, and Thermal Protection: Built-in protection mechanisms to ensure safe operation.
- Power Good Status Output: Indicates when the output voltage is within the regulated range.
Applications
- Smart Phones and PDAs: Ideal for charging and power management in mobile devices.
- MP3 Players: Suitable for portable audio devices requiring efficient battery management.
- Digital Cameras and Handheld Devices: Used in various handheld electronic devices that require reliable power management.
- Internet Appliances: Can be applied in internet-enabled portable devices.
Q & A
- What is the primary function of the BQ24070RHLTG4?
The primary function is to manage power-path and charge single-cell Li-ion or Li-polymer batteries in portable applications while providing continuous power to the system from either the AC adapter or battery sources.
- What is the output regulation voltage of the BQ24070RHLTG4?
The output regulation voltage is 4.4 V).
- What is Dynamic Power-Path Management (DPPM) in the BQ24070RHLTG4?
DPPM allows the AC adapter to simultaneously power the system and charge the battery, ensuring the system voltage is sustained even when the load exceeds the supply capacity).
- Does the BQ24070RHLTG4 have thermal protection?
Yes, it includes thermal regulation for charge control and thermal protection mechanisms to prevent overheating).
- What types of protection does the BQ24070RHLTG4 offer?
The device offers reverse current, short-circuit, and thermal protection).
- Can the BQ24070RHLTG4 operate with an absent or defective battery pack?
Yes, the device can power the system even with an absent or defective battery pack due to its power supplement mode).
- What is the package size of the BQ24070RHLTG4?
The package size is 3.5-mm × 4.5-mm VQFN).
- What is the maximum input current supported by the BQ24070RHLTG4?
The maximum input current is 2 A).
- Does the BQ24070RHLTG4 provide charge status outputs?
Yes, it provides LED or system interface outputs to indicate charge and fault conditions).
- What is the operating junction temperature range of the BQ24070RHLTG4?
The operating junction temperature range is -40°C to 125°C).
