UC3909DW - TI

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

Part No

UC3909DW
Manufacturer

TI
ChipWorker Part#

CW121999627
Category

Battery Management IC
Package

SOIC-20
Description

Switch Mode Charger Lead-Acid 2000mA 20Pin SOIC Tube
Documentation

Datasheet

UC3909DW Global Supplier

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UC3909DW Specifications

Attribute	Attribute Value

Part Number	UC3909DW
Manufacturer	TI
ChipWorker Part#	CW121999627
Category	Battery Management IC
Documentation	Datasheet
Mounting Style	Surface Mount
Number of Pins	20 Pin
Case/Package	SOIC-20
Supply Voltage (DC)	40.0V (max)
Input Voltage (DC)	40.0 V
Output Current	100 mA
Switching Frequency	242 kHz
Operating Temperature (Max)	70 ℃
Operating Temperature (Min)	-20 ℃
Supply Voltage	8.8V ~ 35V
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Operating Temperature	0℃ ~ 70℃ (TA)
Product Lifecycle Status	Active
Packaging	Tube
RoHS	RoHS Compliant
Lead-Free Status	Lead Free

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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- Electrical testing
- Surface testing

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