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UC2909MDWREP 데이터시트(PDF) 1 Page - Texas Instruments |
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UC2909MDWREP 데이터시트(HTML) 1 Page - Texas Instruments |
1 / 21 page UC2909-EP www.ti.com SLUSA72 – JULY 2010 SWITCHMODE LEAD-ACID BATTERY CHARGER Check for Samples: UC2909-EP 1 FEATURES SUPPORTS DEFENSE, AEROSPACE, AND MEDICAL APPLICATIONS • Accurate and Efficient Control of Battery • Controlled Baseline Charging • One Assembly/Test Site • Average Current Mode Control from Trickle to • One Fabrication Site Overcharge • Available in Military (–55°C/125°C) • Resistor Programmable Charge Currents Temperature Range(1) • Thermistor Interface Tracks Battery • Extended Product Life Cycle Requirements Over Temperature • Extended Product-Change Notification • Output Status Bits Report on Four Internal • Product Traceability Charge States • Not to Exceed 185.35-KHz Oscillation • Undervoltage Lockout Monitors VCC and Frequency at 125°C VREF (1) Additional temperature ranges available - contact factory 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. FUNCTION BLOCK DIAGRAM 1 Please be aware that an important notice concerning availability, standard warranty, and use in critical applications of Texas Instruments semiconductor products and disclaimers thereto appears at the end of this data sheet. PRODUCTION DATA information is current as of publication date. Copyright © 2010, Texas Instruments Incorporated Products conform to specifications per the terms of the Texas Instruments standard warranty. Production processing does not necessarily include testing of all parameters. |
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