Monolithic Power Systems MP2681 | Demoboard EV2681-S-00A

Description

The EV2681-S-00A is an evaluation board for MP2681 which is a voltage and current control IC integrated a precision voltage reference and charge status indications. It is suitable for AC adapter input in the plug-in, cradle charger applications. The device automatically detects the battery cell through the battery ID resistor and regulates the battery voltage according to the cell information: 3S1P, 3S2P, 4S1P, 4S2P, 5S1P and 5S2P. Then the AC adapter output is automatically set according to the battery specification. Additionally, for the battery spec which is inside the six kinds but without the ID resistor, user can artificially connect a resistor from ID pin to GND to make a right ID voltage input for cell detection and MP2681 could set the output voltage accordingly. The DC voltage and the current level at the output of the forward-switching power supply are compared to the voltage reference and current limitation, respectively. MP2681 feeds the control signal back to the controller IC at the primary side through an opto-coupler. Furthermore, MP2681 provides fixed pre-charge mode for the deep-discharged battery. The safety feature includes battery temperature monitoring-NTC control, charge time-out and fault control, it also provides charge status indication

Features

Constant Voltage and Constant CurrentControl

• Pre-Charge Mode for Deep-dischargedBattery
• Automatic Battery Cell Detection
• Two 1MHz Bandwidth Operational AmplifierOutput Connected with OR Logic
• Wide Input Voltage Range: 4.5V to 30V
• Auto-Recharge
• Charge On/Off Control
• Programmable Internal Timer
• Battery Temperature Monitoring
• Charge Status Indication
• Power Line Fault Detection
• Over Temperature Protection

Typical applications

• Battery Charger for Portable Tools,Standalone Fast Charger

More information

• Datasheet
• IC product information