Overview
The LT8491IUKJ#PBF is a high-performance buck-boost switching regulator battery charger produced by Analog Devices Inc. This device is designed to implement a constant-current constant-voltage (CCCV) charging profile, making it suitable for various battery types including sealed lead-acid (SLA), flooded, gel, and lithium-ion batteries. The LT8491 operates from input voltages above, below, or equal to the output voltage and can be powered by a solar panel or a DC power supply. It features on-chip logic for automatic maximum power point tracking (MPPT) in solar-powered applications and supports automatic temperature compensation using an external thermistor.
Key Specifications
| Parameter | Conditions | Min | Typ | Max | Units |
|---|---|---|---|---|---|
| VIN Operating Voltage Range | 6 | 80 | V | ||
| VIN Quiescent Current (Not Switching) | VEXTVCC = 0, VDD = AVDD = Float | 2.65 | 4.2 | mA | |
| VDD Quiescent Current | IAVDD + IVDD, VDD = AVDD = 3.3V | 2.5 | 4 | 6.5 | mA |
| EXTVCC Switchover Voltage | IINTVCC = 20mA, VEXTVCC Rising | 6.15 | 6.4 | 6.6 | V |
| SYNC High Level for Synchronization | 1.3 | V | |||
| SYNC Low Level for Synchronization | 0.5 | V | |||
| CLKOUT Output Voltage HIGH | 1mA Out of CLKOUT Pin | 2.3 | 2.45 | 2.55 | V |
| Operating Temperature Range | -40 | 125 | °C |
Key Features
- Constant-current constant-voltage (CCCV) charging profile for various battery types.
- Operates from input voltages above, below, or equal to the output voltage.
- Automatic maximum power point tracking (MPPT) for solar-powered applications.
- Automatic temperature compensation using an external thermistor.
- I2C interface for configuration and monitoring.
- STATUS pin for driving an LED indicator lamp.
- Available in a low-profile (0.75mm) 7mm × 11mm 64-lead QFN package.
Applications
- Solar-powered battery charging systems.
- DC power supply-based battery charging systems.
- Lead-acid, lithium-ion, and other battery types charging.
- Industrial and automotive battery management systems.
- Renewable energy systems requiring efficient battery charging.
Q & A
- What is the operating voltage range of the LT8491IUKJ#PBF?
The operating voltage range is from 6V to 80V. - What types of batteries can the LT8491IUKJ#PBF charge?
The device can charge sealed lead-acid (SLA), flooded, gel, and lithium-ion batteries. - Does the LT8491IUKJ#PBF support maximum power point tracking (MPPT)?
Yes, it supports automatic MPPT for solar-powered applications. - How does the LT8491IUKJ#PBF handle temperature compensation?
It supports automatic temperature compensation using an external thermistor. - What is the package type and dimensions of the LT8491IUKJ#PBF?
The device is available in a 7mm × 11mm 64-lead QFN package with a low profile of 0.75mm. - What is the operating temperature range of the LT8491IUKJ#PBF?
The operating temperature range is from -40°C to 125°C. - Does the LT8491IUKJ#PBF have an I2C interface?
Yes, it has an I2C interface for configuration and monitoring. - What is the purpose of the STATUS pin on the LT8491IUKJ#PBF?
The STATUS pin can be used to drive an LED indicator lamp. - Can the LT8491IUKJ#PBF be powered by a solar panel or a DC power supply?
Yes, it can be powered by either a solar panel or a DC power supply. - What is the quiescent current of the LT8491IUKJ#PBF when not switching?
The quiescent current is 2.65 mA to 4.2 mA when not switching.
