Overview
The LTC4013EUFD#TRPBF, produced by Analog Devices Inc., is a high-voltage battery charger IC designed to charge a wide range of lead-acid batteries, including both vented and sealed types. It also supports charging for Li-Ion/Polymer and LiFePO4 batteries. This synchronous buck multi-chemistry battery charger operates with high efficiency and features a programmable charge current and voltage regulation suitable for various battery types.
Key Specifications
| Parameter | Min | Typ | Max | Units |
|---|---|---|---|---|
| Input Voltage Range (DCIN, VIN) | 4.5 | 60 | V | |
| Battery Voltage Range (BAT) | 2.4 | 60 | V | |
| ENAB Pin Threshold (Rising) | 1.175 | 1.220 | 1.275 | V |
| ENAB Pin Bias Current | 10 | nA | ||
| Operating Temperature Range | –40 | 125 | °C | |
| Package Type | 28-QFN (4x5) |
Key Features
- High-efficiency synchronous buck (step-down) converter using external N-channel MOSFETs.
- Programmable charge current with an external sense resistor.
- Maximum power point tracking (MPPT) input-voltage regulation for limited power sources like solar panels.
- User-programmable absorption and equalization times.
- Support for 3-stage and 4-stage lead-acid charging, including bulk, float, absorption, and equalization phases.
- Defective battery protection with automatic reduction of charge current and termination of the charge cycle if the battery remains below the low battery threshold.
- Charge cycle timer for absorption to float transition, equalization timeout, and constant-voltage timeout.
- Proprietary circuitry for improved switching regulator efficiency in low light conditions.
Applications
The LTC4013EUFD#TRPBF is suitable for a variety of applications, including:
- Charging lead-acid batteries in automotive, industrial, and renewable energy systems.
- Charging Li-Ion/Polymer and LiFePO4 batteries in various consumer and industrial devices.
- Solar-powered battery charging systems where maximum power point tracking is essential.
- Battery management systems requiring high efficiency and programmable charging profiles.
Q & A
- What types of batteries does the LTC4013EUFD#TRPBF support? The LTC4013EUFD#TRPBF supports charging for lead-acid batteries (both vented and sealed), as well as Li-Ion/Polymer and LiFePO4 batteries.
- What is the input voltage range of the LTC4013EUFD#TRPBF? The input voltage range is from 4.5V to 60V.
- How is the charge current programmed in the LTC4013EUFD#TRPBF? The charge current is programmed using an external sense resistor.
- Does the LTC4013EUFD#TRPBF support maximum power point tracking (MPPT)? Yes, it supports MPPT for input-voltage regulation, particularly useful for solar panels.
- What are the different charging phases supported by the LTC4013EUFD#TRPBF? It supports bulk, float, absorption, and equalization phases for lead-acid batteries, and 2-stage charging for Li-Ion batteries.
- How does the defective battery protection work in the LTC4013EUFD#TRPBF? If the battery voltage is below the low battery threshold for an extended period, the charge current is reduced, and the charge cycle may terminate with a fault indication.
- What is the purpose of the charge cycle timer in the LTC4013EUFD#TRPBF? The timer is used for absorption to float transition, equalization timeout, and constant-voltage timeout, ensuring safe and controlled charging.
- Can the switching frequency of the LTC4013EUFD#TRPBF be programmed or synchronized? Yes, the switching frequency can be programmed with a resistor or synchronized to an external clock.
- What is the operating temperature range of the LTC4013EUFD#TRPBF? The operating temperature range is from –40°C to 125°C.
- What package type is the LTC4013EUFD#TRPBF available in? It is available in a 28-QFN (4x5) package.
