LM36922H
Hocheffizienter Treiber für zwei weiße LED-Ketten
LM36922H
- 1% Matched Current Sinks Across Process, Voltage, Temperature
- 3% Current-Sink Accuracy Across Process, Voltage, Temperature
- 11-Bit Dimming Resolution
- Up to 90% Solution Efficiency
- Drives from One to Two Parallel LED Strings at up to 38 V at 25 mA per String
- PWM Dimming Input
- I2C Programmable
- Selectable 500-kHz and 1-MHz Switching Frequency With Optional –12% shift
- Auto Switch Frequency Mode (250 kHz, 500 kHz, 1 MHz)
- Four Configurable Overvoltage Protection Thresholds (17 V, 24 V, 31 V, 38 V)
- Four Configurable Overcurrent Protection Thresholds (750 mA, 1000 mA, 1250 mA,
1500 mA) - Thermal Shutdown Protection
- Externally Selectable I2C Address Options via ASEL Input
The LM36922H is an ultra-compact, highly efficient, two-string white-LED driver designed for LCD display backlighting. The device can power up to 12 series LEDs at up to 25 mA per string. An adaptive current regulation method allows for different LED voltages in each string while maintaining current regulation.
The LED current is adjusted via an I2C interface or through a logic level PWM input. The PWM duty cycle is internally sensed and mapped to an 11-bit current thus allowing for a wide range of PWM frequencies with noise-free operation from 50 µA to 25 mA.
Other features include an auto-frequency mode, which can automatically change the frequency based on load current in order to optimize efficiency.
The device operates over the 2.5-V to 5.5-V input voltage range and a –40°C to +85°C temperature range.
For all available packages, see the orderable addendum at the end of the data sheet.Technische Dokumentation
Typ | Titel | Datum | ||
---|---|---|---|---|
* | Data sheet | LM36922H Highly Efficient Dual-String White LED Driver datasheet (Rev. A) | PDF | HTML | 16 Feb 2016 |
White paper | Common LED Functions and LED Driver Design Considerations | 21 Sep 2020 | ||
Application note | Analog PWM Dimming in White-LED Drivers | 21 Dez 2016 |
Design und Entwicklung
Weitere Bedingungen oder erforderliche Ressourcen enthält gegebenenfalls die Detailseite, die Sie durch Klicken auf einen der unten stehenden Titel erreichen.
LM36922EVM — LM36922 Hocheffizienter Zweistrang-Treiber für weiße LEDs – Evaluierungsmodul
The LM36922 Evaluation Module (LM36922EVM) is designed to fully evaluate the LM36922 Highly Efficient Dual-String White LED backlight driver. The LM36922EVM consists of the LM36922 with 2p8s white LED strings with jumpers to enable 1p2s through 2p8s led string configurations. LED string (...)
PSPICE-FOR-TI — PSpice® für TI Design-und Simulationstool
Gehäuse | Pins | CAD-Symbole, Footprints und 3D-Modelle |
---|---|---|
DSBGA (YFF) | 12 | Ultra Librarian |
Bestellen & Qualität
- RoHS
- REACH
- Bausteinkennzeichnung
- Blei-Finish/Ball-Material
- MSL-Rating / Spitzenrückfluss
- MTBF-/FIT-Schätzungen
- Materialinhalt
- Qualifikationszusammenfassung
- Kontinuierliches Zuverlässigkeitsmonitoring
- Werksstandort
- Montagestandort
Support und Schulungen
TI E2E™-Foren mit technischem Support von TI-Ingenieuren
Inhalte werden ohne Gewähr von TI und der Community bereitgestellt. Sie stellen keine Spezifikationen von TI dar. Siehe Nutzungsbedingungen.
Bei Fragen zu den Themen Qualität, Gehäuse oder Bestellung von TI-Produkten siehe TI-Support.