UC2909-EP中文资料具有差分电流感应的增强型产品开关模式铅酸电池充电器数据手册TI规格书

描述 Description

The UC2909 controls lead acid battery charging with a highly efficient average current mode control loop. This chip combines charge state logic with average current PWM control circuitry. Charge state logic commands current or voltage control depending on the charge state. The chip includes undervoltage lockout circuitry to insure sufficient supply voltage is present before output switching starts. Additional circuit blocks include a differential current sense amplifier, a 1.5% voltage reference, a –3.9-mV/°C thermistor linearization circuit, voltage and current error amplifiers, a PWM oscillator, a PWM comparator, a PWM latch, charge state decode bits, and a 100-mA open collector output driver.

特性 Features

• Accurate and Efficient Control of Battery Charging
• Resistor Programmable Charge Currents
• Output Status Bits Report on Four Internal Charge States
• APPLICATIONS
• One Assembly/Test Site
• Available in Military (–55°C/125°C) Temperature Range
• Extended Product-Change Notification
• Not to Exceed 185.35-KHz Oscillation Frequency at 125°C


Additional temperature ranges available - contact factory