MAX1557ETB+T

Product Overview

• Category: Integrated Circuits (ICs)
• Use: Battery Chargers
• Characteristics: High Efficiency, Low Quiescent Current, Small Package Size
• Package: 10-WLP (1.5x1.5)
• Essence: Power Management IC for Single-Cell Li+ Battery Charging
• Packaging/Quantity: Tape & Reel (3000 pieces per reel)

Specifications

• Input Voltage Range: 4.5V to 28V
• Charge Voltage Accuracy: ±0.5%
• Maximum Charge Current: 500mA
• Operating Temperature Range: -40°C to +85°C
• Shutdown Current: <1µA
• Thermal Shutdown Protection: Yes
• Battery Temperature Monitoring: Yes

Detailed Pin Configuration

The MAX1557ETB+T has the following pin configuration:

1. GND: Ground
2. STAT: Status Output
3. PROG: Programming Input
4. TS: Battery Temperature Sense Input
5. BAT: Battery Connection
6. IN: Input Voltage Supply
7. CE: Enable Input
8. OUT: Output Voltage

Functional Features

• Integrated power switch and current-sense resistor
• Programmable charge current through external resistor
• Automatic recharge feature
• Reverse battery protection
• LED status indication
• Thermal regulation and protection
• Battery temperature monitoring

Advantages and Disadvantages

Advantages: - High charging efficiency - Low quiescent current - Small package size - Wide input voltage range - Accurate charge voltage control - Built-in thermal shutdown protection

Disadvantages: - Limited maximum charge current (500mA) - Requires an external resistor for programming charge current

Working Principles

The MAX1557ETB+T is a power management IC designed for single-cell Li+ battery charging. It utilizes a high-efficiency switch-mode architecture to provide fast and efficient charging while minimizing power dissipation. The IC incorporates a programmable charge current feature, allowing the user to set the desired charging rate through an external resistor connected to the PROG pin.

The device also includes thermal regulation and protection mechanisms to prevent overheating during charging. It monitors the battery temperature through the TS pin and adjusts the charging current accordingly. In case of excessive temperature rise, the IC activates thermal shutdown to protect itself and the battery.

Detailed Application Field Plans

The MAX1557ETB+T is widely used in various portable electronic devices that require single-cell Li+ battery charging. Some common application fields include:

1. Smartphones and tablets
2. Portable media players
3. Bluetooth headsets
4. Wearable devices
5. GPS navigation systems
6. Digital cameras

Detailed and Complete Alternative Models

1. MCP73831: Single-Cell Li-Ion/Li-Polymer Charge Management Controller
2. BQ24075: Single-Cell Li-Ion Battery Charger with Power Path Management
3. LTC4054: Standalone Linear Li-Ion Battery Charger

These alternative models offer similar functionality and can be considered as alternatives to the MAX1557ETB+T depending on specific requirements and design constraints.

In conclusion, the MAX1557ETB+T is a highly efficient and compact power management IC designed for single-cell Li+ battery charging. Its programmable charge current, thermal regulation, and protection features make it suitable for a wide range of portable electronic devices.