Description
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
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.