LT8393 Series

60VIN, 100VOUTSynchronous 4-Switch Buck-Boost LED Driver Controller with Low EMI

Catalog

60VIN, 100VOUTSynchronous 4-Switch Buck-Boost LED Driver Controller with Low EMI

Part	Number of Outputs	Operating Temperature [Min]	Operating Temperature [Max]	Applications	Voltage - Supply (Min) [Min]	Internal Switch(s)	Supplier Device Package	Qualification	Topology	Type	Dimming	Mounting Type	Grade	Package / Case	Voltage - Output [Min]	Voltage - Output [Max]	Frequency [Max]	Frequency [Min]
Analog Devices LT8393EUFDM#PBF	1	-40 °C	125 ¯C	Lighting	4 V		28-QFN (4x5)	AEC-Q100	Step-Down (Buck) Step-Up (Boost)	DC DC Controller	Analog PWM	Surface Mount Wettable Flank	Automotive	28-WFQFN Exposed Pad	0 VDC	100 VDC	2 MHz	350 kHz
Analog Devices LT8393EUFDM#TRPBF	1	-40 °C	125 ¯C	Lighting	4 V		28-QFN (4x5)	AEC-Q100	Step-Down (Buck) Step-Up (Boost)	DC DC Controller	Analog PWM	Surface Mount Wettable Flank	Automotive	28-WFQFN Exposed Pad	0 VDC	100 VDC	2 MHz	350 kHz

Catalog

60VIN, 100VOUTSynchronous 4-Switch Buck-Boost LED Driver Controller with Low EMI

Key Features

• 4-Switch Single Inductor Architecture Allows VINAbove, Below or Equal to VOUT

• Up to 95% Efficiency

• Proprietary Peak-Buck Peak-Boost Current Mode

• Wide VINRange: 4V to 60V

• Wide VOUTRange: 0V to 100V

• ±4% LED Current Accuracy

• 2000:1 External and 128:1 Internal PWM Dimming

• 10V High Side PMOS PWM Switch Driver

• No Top MOSFET Refresh Noise in Buck or Boost

• Adjustable and Synchronizable: 350kHz to 2MHz

• Flicker-Free Spread Spectrum for Low EMI

• Open and Short LED Protection with Fault Reporting

• AEC-Q100 Qualified for Automotive Applications

Description

The LT8393 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 350kHz to 2MHz fixed frequency operation, or internal 25% triangle spread spectrum operation for low EMI. With 4V to 60V input, 0V to 100V output, and seamless low noise transitions between operation regions, the LT8393 is ideal for LED driver and battery charger applications in automotive, industrial, and battery-powered systems.The LT8393 provides both internal (up to 128:1) and external (up to 2000:1) LED current PWM dimming with 10V of high side PMOS gate drive. The CTRL pin provides 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 LT8393 retries, latches off, or keeps running.APPLICATIONSAutomotive Head Lamps/Running LampsHigh Voltage LED Lighting