LT8391AEFE#TRPBF
Active60V 2MHZ SYNCHRONOUS 4-SWITCH BUCK-BOOST LED DRIVER CONTROLLER
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LT8391AEFE#TRPBF
Active60V 2MHZ SYNCHRONOUS 4-SWITCH BUCK-BOOST LED DRIVER CONTROLLER
Technical Specifications
Parameters and characteristics for this part
| Specification | LT8391AEFE#TRPBF |
|---|---|
| Applications | Lighting |
| Dimming | Analog, PWM |
| Frequency [Max] | 2 MHz |
| Frequency [Min] | 600 kHz |
| Grade | Automotive |
| Internal Switch(s) | False |
| Mounting Type | Surface Mount |
| Number of Outputs | 1 |
| Operating Temperature [Max] | 125 ¯C |
| Operating Temperature [Min] | -40 °C |
| Package / Case | Exposed Pad, 28-TSSOP |
| Package / Case [custom] | 4.4 mm |
| Package / Case [x] | 0.173 in |
| Supplier Device Package | 28-TSSOP-EP |
| Topology | Step-Down (Buck), Step-Up (Boost) |
| Type | DC DC Controller |
| Voltage - Output | 60 V |
| Voltage - Supply (Min) [Min] | 4 V |
Pricing
Prices provided here are for design reference only. For realtime values and availability, please visit the distributors directly
| Distributor | Package | Quantity | $ | |
|---|---|---|---|---|
| Digikey | Tape & Reel (TR) | 2000 | $ 4.83 | |
Description
General part information
LT8391A Series
The LT8391A is a synchronous 4-switch buck-boost LED controller that regulates LED current from input voltage above, below, or equal to the output voltage. The proprietary peak-buck peak-boost current mode control scheme allows adjustable and synchronizable 600kHz to 2MHz fixed frequency operation, or internal 25% triangle spread spectrum operation for low EMI. With 4V to 60V input, 0V to 60V output, and seamless low noise transitions between operation regions, the LT8391A is ideal for LED driver and battery charger applications in automotive, industrial, and battery-powered systems.The LT8391A provides both internal (up to 128:1) and external (up to 2000:1) LED current PWM dimming with a high-side PMOS switch. Two CTRL pins provide flexible 20:1 analog dimming with ±3% LED current accuracy at 100mV full scale. Fault protection is provided to detect an open or short LED condition, during which the LT8391A retries, latches off, or keeps running.Switching FrequencyMax Output PowerLT8391Adjustable 150kHz - 650kHz450W+LT8391A2MHz50W+APPLICATIONSAutomotive Head Lamps/Running LampsHigh Frequency LED Lighting