The L99LD21 is a flexible LED driver, which is specifically designed for the control of two independent high brightness LED strings for automotive front lighting applications. It consists of a high efficiency monolithic boost controller and a dual buck converter.
The boost controller integrates a high current gate driver for an external n-channel mosfet. It delivers a constant output voltage, up to 60 V, which supplies the inputs of the two integrated or external buck converters.
The boost controller of two devices can be stacked, in order to operate in dual phase for high power applications, with an interleaving pattern for an improved input current ripple.
The buck converters integrate n-channel mosfet which is driven by a bootstrap circuit.
|DB2773: High power LED driver for automotive applications||1.0||262 KB|
|DS11130: High power LED driver for automotive applications||4.0||1 MB|
|Smart power solutions for car body applications||4.0||3 MB|
|Part Number||Marketing Status||Quantity||Unit Price (US$) *||Package||Packing Type||Operating Temperature (°C) (min)||Operating Temperature (°C) (max)||ECCN (EU)||ECCN (US)||Country of Origin||More info||Order from ST||Order from Distributors|
|L99LD21Q6TR||Active : Product is in volume production||-||-||VFQFPN 6X6||Tape And Reel||-||-||NEC||EAR99||-||MORE INFO||No availability reported, please contact our Sales office|
|L99LD21TR||Target : Product is in design feasibility stage. No commitment taken to produce||-||-||TQFP 48 7x7x1.0||Tray||-||-||NEC||EAR99||-||MORE INFO||No availability reported, please contact our Sales office|
|L99LD21Q6||Active : Product is in volume production||-||-||VFQFPN 6X6||Tray||-||-||NEC||EAR99||MALAYSIA||MORE INFO||No availability reported, please contact our Sales office|
|Part Number||Marketing Status||Package||Grade||RoHS Compliance Grade||Material Declaration**|
|L99LD21TR||Target||TQFP 48 7x7x1.0||Automotive||Ecopack2|
(**) The Material Declaration forms available on st.com may be generic documents based on the most commonly used package within a package family. For this reason, they may not be 100% accurate for a specific device. Please contact our sales support for information on specific devices.