BQ29400中文资料针对 2 节、3 节或 4 节锂离子和锂聚合物电池的 2 级过压保护（第 2 级保护）数据手册TI规格书

描述 Description

The bq29400, bq29400A, bq29401, and bq29405 are BiCMOS secondary protection ICs for 2-, 3-, or 4-cell Lithium-Ion battery packs that incorporate a high-accuracy precision over voltage detection circuit. They include a programmable delay circuit for over voltage detection time. Each cell in a multiple cell pack is compared to an internal reference voltage. If one cell reaches an overvoltage condition, the protection sequence begins. The bq2940x device starts charging an external capacitor through the CD pin. When the CD pin voltage reaches 1.2 V, the OUT pin changes from a low level to a high level.

特性 Features

• 2-, 3-, or 4-Cell Secondary Protection
• High Accuracy Over Sense Voltage:
• bq29400A: 4.40 V ±25 mV
• bq29405: 4.65 V ±25 mV
• Prefixed Protection Threshold Voltage
• High Power Supply Ripple Rejection
• APPLICATIONS
• Notebook PCs
• Medical and Test Equipment