LM1949N/NOPB Texas Instruments - Yeehing Electronics

Injector Drive Controller

Pricing (USD)

Quantity	Unit Price
1 — 99	4.808
100 — 249	4.213
250 — 999	2.954
1,000 +	1.67

The above prices are for reference only.

Specifications

Manufacturer	Texas Instruments
Product Category	Motor / Motion / Ignition Controllers & Drivers
RoHS	Y
Product	Electronic Ignition Drivers
Operating Supply Voltage	3 V to 5.5 V
Output Current	22 mA
Minimum Operating Temperature	- 55 C
Maximum Operating Temperature	+ 125 C
Mounting Style	Through Hole
Package / Case	PDIP-8
Packaging	Tube
Number of Outputs	1 Output
Operating Temperature Range	- 55 C to + 125 C
Series	LM1949
Brand	Texas Instruments
Product Type	Motor / Motion / Ignition Controllers & Drivers
Factory Pack Quantity	40
Subcategory	PMIC - Power Management ICs
Unit Weight	0.032805 oz

For more information, please refer to datasheet

Documents

LM1949N/NOPB Datasheet

More Information

The LM1949 linear integrated circuit serves as an excellent control of fuel injector drive circuitry in modern automotive systems. The IC is designed to control an external power NPN Darlington transistor that drives the high current injector solenoid. The current required to open a solenoid is several times greater than the current necessary to merely hold it open; therefore, the LM1949, by directly sensing the actual solenoid current, initially saturates the driver until the “peak” injector current is four times that of the idle or “holding” current (–). This guarantees opening of the injector. The current is then automatically reduced to the sufficient holding level for the duration of the input pulse. In this way, the total power consumed by the system is dramatically reduced. Also, a higher degree of correlation of fuel to the input voltage pulse (or duty cycle) is achieved, since opening and closing delays of the solenoid will be reduced.