LT3652HVIDD#TRPBF

Product Overview

• Category: Integrated Circuit (IC)
• Use: Battery Charger
• Characteristics: High Voltage, Dual Input, Synchronous Step-Down Battery Charger
• Package: 16-Lead 3mm × 3mm DFN
• Essence: Efficient and versatile battery charger with advanced features
• Packaging/Quantity: Tape & Reel, 2500 units per reel

Specifications

The LT3652HVIDD#TRPBF is a high voltage, dual input, synchronous step-down battery charger IC. It is designed to efficiently charge a single-cell Li-Ion/Polymer battery from various power sources such as wall adapters, USB ports, or solar panels.

Key specifications of the LT3652HVIDD#TRPBF include:

• Input Voltage Range: 4.95V to 32V
• Maximum Charging Current: 2A
• Programmable Charge Current: Up to 2A
• Float Voltage: 4.1V
• Trickle Charge Current: 10% of programmed charge current
• Efficiency: Up to 94%
• Operating Temperature Range: -40°C to 85°C

Pin Configuration

The LT3652HVIDD#TRPBF has a 16-lead 3mm × 3mm DFN package. The pin configuration is as follows:

1. VIN1: Input Voltage 1
2. VIN2: Input Voltage 2
3. GND: Ground
4. PGND: Power Ground
5. VFB: Feedback Voltage
6. ISET: Charge Current Set
7. STAT: Status Indicator
8. TS: Thermal Shutdown
9. BAT: Battery Connection
10. PROG: Programming Resistor
11. ILIM: Input Current Limit
12. VOUT: Output Voltage
13. SW1: Switch Node 1
14. SW2: Switch Node 2
15. SS: Soft-Start Capacitor
16. INTVCC: Internal Voltage Regulator

Functional Features

The LT3652HVIDD#TRPBF offers several functional features that make it a versatile battery charger:

1. Dual Input Capability: Allows charging from two different power sources simultaneously.
2. PowerPath Control: Automatically selects the input with the higher voltage for charging, ensuring uninterrupted operation.
3. Maximum Power Point Tracking (MPPT): Optimizes solar panel output for efficient charging in solar-powered applications.
4. Programmable Charge Current: Provides flexibility to set the desired charge current based on battery capacity and application requirements.
5. Thermal Shutdown Protection: Safeguards the IC by shutting down charging when the temperature exceeds the specified limit.

Advantages and Disadvantages

Advantages of the LT3652HVIDD#TRPBF include:

• Wide input voltage range allows charging from various power sources.
• High efficiency minimizes power loss during charging.
• Dual input capability provides flexibility in power source selection.
• Advanced features like MPPT and PowerPath control enhance charging performance.

Disadvantages of the LT3652HVIDD#TRPBF include:

• Limited to single-cell Li-Ion/Polymer battery charging.
• Requires external components for complete battery charging circuit implementation.

Working Principles

The LT3652HVIDD#TRPBF operates as a synchronous step-down battery charger. It utilizes a high efficiency switching regulator to convert the input voltage to the required charging voltage for the battery. The charge current is programmable through an external resistor connected to the ISET pin.

The IC incorporates advanced algorithms for power source selection, maximum power point tracking, and thermal management. These features ensure optimal charging performance while protecting the battery and the charger from potential damage.

Detailed Application Field Plans

The LT3652HVIDD#TRPBF is suitable for a wide range of applications, including:

1. Portable Electronics: Charging batteries in smartphones, tablets, portable speakers, etc.
2. IoT Devices: Powering and charging batteries in connected devices, sensors, wearables, etc.
3. Solar-Powered Systems: Charging batteries in solar-powered lights, outdoor equipment, remote monitoring systems, etc.
4. Automotive: Battery charging in electric vehicles, hybrid vehicles, and automotive accessories.

Detailed and Complete Alternative Models

• LT3652IDD#PBF: Similar to LT3652HVIDD#TRPBF but without high voltage input capability.
• LTC4000-1: High voltage battery charger with additional power path control features.
• MCP73871: Low-cost single-cell Li-Ion/Polymer battery charger with integrated pass transistor.

These alternative models offer similar functionality and can be considered based on specific application requirements.

In conclusion, the LT3652HVIDD#TRPBF is a highly efficient and versatile battery