UC3909N - TI

The pictures are for reference only, and the specific specifications can be found in the product manual.

Part No

UC3909N
Manufacturer

TI
ChipWorker Part#

CW105890903
Category

Battery Management IC
Package

DIP-20
Description

TEXAS INSTRUMENTS UC3909N Battery Charger for Lead Acid battery, 40V input, 2A charge, DIP-20
Documentation

Datasheet

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UC3909N Specifications

Attribute	Attribute Value

Part Number	UC3909N
Manufacturer	TI
ChipWorker Part#	CW105890903
Category	Battery Management IC
Documentation	Datasheet
Mounting Style	Through Hole
Number of Pins	20 Pin
Case/Package	DIP-20
Supply Voltage (DC)	40.0V (max)
Input Voltage (DC)	40.0 V
Output Voltage	5.25 V
Output Current	2000 mA
Switching Frequency	242 kHz
Operating Temperature (Max)	70 ℃
Operating Temperature (Min)	0 ℃
Supply Voltage	8.8V ~ 35V
Supply Voltage (Min)	8.8 V
Input Voltage	40 V
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Operating Temperature	0℃ ~ 70℃
Product Lifecycle Status	Active
Packaging	Each
RoHS	RoHS Compliant
Lead-Free Status	Lead Free
REACH SVHC Compliance	No SVHC
REACH SVHC Compliance Edition	2015/06/15
ECCN Code	EAR99

Product Description

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 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 –3.9mV/°C thermistor linearization circuit, voltage and current error amplifiers, a PWM oscillator, a PWM comparator, a PWM latch, charge state decode bits, and a 100mA open collector output driver.
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

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