Overview
The LTC4001EUF-1#PBF is a 2A synchronous buck Li-Ion battery charger produced by Analog Devices Inc. This integrated circuit is designed for use with 5V wall adapters and features a 1.5MHz synchronous buck converter topology, which significantly reduces power dissipation during charging. The device includes complete charge termination circuitry, automatic recharge, and a ±1% 4.1V float voltage, making it suitable for a wide range of handheld applications. The LTC4001EUF-1#PBF is particularly useful in environments where the operating or storage temperature exceeds approximately 60°C.
Key Specifications
| Parameter | Conditions | Min | Typ | Max | Units |
|---|---|---|---|---|---|
| Oscillator Frequency (fOSC) | 1.3 | 1.5 | 1.7 | MHz | |
| Maximum Duty Factor (D) | 100% | ||||
| Input Voltage (PVIN, VINSENSE) | t < 1ms, DC < 1% | -0.3 | 7 | V | |
| Input Voltage (PVIN, VINSENSE) - Steady State | -0.3 | 6 | V | ||
| Operating Temperature Range | -40 | 85 | °C | ||
| Charge Current | 2 | A | |||
| Float Voltage | 4.1V ± 1% | V |
Key Features
- Constant current, constant voltage Li-Ion battery charging based on a synchronous buck architecture.
- Low power dissipation, enabling continuous high-rate (2A) battery charging.
- Internal MOSFET and sense resistor for a compact design.
- Complete charge termination circuitry and automatic recharge.
- ±1% 4.1V float voltage accuracy.
- Input short-circuit protection, eliminating the need for a blocking diode.
- Overcurrent, overvoltage, and low-battery protection.
- Soft-start and thermal shutdown features.
Applications
The LTC4001EUF-1#PBF is suitable for a variety of handheld and portable applications, including:
- Smartphones and tablets.
- Portable media players and gaming devices.
- Handheld medical devices and diagnostic equipment.
- Industrial handheld devices and remote controls.
- Any application requiring efficient and reliable Li-Ion battery charging.
Q & A
- What is the maximum charge current of the LTC4001EUF-1#PBF?
The maximum charge current is 2A.
- What is the typical oscillator frequency of the LTC4001EUF-1#PBF?
The typical oscillator frequency is 1.5MHz.
- What is the float voltage accuracy of the LTC4001EUF-1#PBF?
The float voltage accuracy is ±1% of 4.1V.
- Does the LTC4001EUF-1#PBF have input short-circuit protection?
- What is the operating temperature range of the LTC4001EUF-1#PBF?
The operating temperature range is -40°C to 85°C.
- Does the LTC4001EUF-1#PBF support automatic recharge?
- What type of converter topology does the LTC4001EUF-1#PBF use?
- Is the LTC4001EUF-1#PBF suitable for high-temperature environments?
- What are some common applications for the LTC4001EUF-1#PBF?
- Does the LTC4001EUF-1#PBF have overcurrent protection?
