UC2909-EP - Texas Instruments

UC2909-EP SWITCHMODE LEAD-ACID BATTERY CHARGER

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 i.

Features

1
• Accurate and Efficient Control of Battery Charging
• Average Current Mode Control from Trickle to Overcharge
• Resistor Programmable Charge Currents
• Thermistor Interface Tracks Battery Requirements Over Temperature
• Output Status Bits Report on Four Internal Charge States
• Undervoltage Lockout Monitors VCC and VREF SUPPORTS DEFENSE, AEROSPACE, AND MEDICAL APPLICATIONS
• Controlled Baseline
• One Assembly/Test Site
• One Fabrication Site
• Available in Military (
  –55°C/125°C) Temperature Range(1)
• Extended Product Life Cycle
• Extended Product-Change Notification
• Product Traceability.