UC2909 Datasheet | Unitrode

- Obsolete Device UC2909 UC3909 Switchmode Lead-Acid Battery Charger Features - 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 DESCRIPTION The UC3909 family of Switchmode Lead-Acid Battery Chargers accurately controls lead acid battery charging with a highly efficient average current mode control loop. This chip bines charge state logic with average current PWM control circuitry. Charge state logic mands...