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UC2909MDWREP датащи(PDF) 1 Page - Texas Instruments

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номер детали UC2909MDWREP
подробное описание детали  SWITCHMODE LEAD-ACID BATTERY CHARGER
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производитель  TI1 [Texas Instruments]
домашняя страница  http://www.ti.com
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UC2909MDWREP датащи(HTML) 1 Page - Texas Instruments

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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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