L9409F
ObsoleteALTERNATOR VOLTAGE REGULATOR 8-PIN(8+TAB) MULTIWATT TUBE
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L9409F
ObsoleteALTERNATOR VOLTAGE REGULATOR 8-PIN(8+TAB) MULTIWATT TUBE
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Technical Specifications
Parameters and characteristics for this part
| Specification | L9409F |
|---|---|
| Mounting Type | Through Hole |
| Package / Case | Multiwatt-8 (Straight Leads) |
| Supplier Device Package | Multiwatt-8 (Straight Leads) |
Pricing
Prices provided here are for design reference only. For realtime values and availability, please visit the distributors directly
| Distributor | Package | Quantity | $ | |
|---|---|---|---|---|
| Digikey | N/A | 0 | $ 3.98 | |
Description
General part information
L9409 Series
The L9409 is a monolithic multifunction alternator voltage regulator intended for use in automotive applications.
The device regulates the output of an automotive generator by controlling the field winding current by means of either an analog fixed frequency PWM signal or digital fixed frequency PWM signal (LRC). The Load Response Control function is activated in order to eliminate IC engine speed fluctuation and vibrations caused by the insertion of sudden electrical loads during alternator low speed operations (f < 310 Hz). Both the analog and digital duty cycle are applied to a high side driver.
The device is able to regulate the voltage either using a feedback signal from B pin or from S pin depending on application needs. S pin is intended to have a clear direct connection with the positive terminal of the car battery. If this connection gets lost the device will regulate voltage using B pin giving a fail safe functionality.
Documents
Technical documentation and resources