The LT3596
is a 60V step-down LED Driver. It achieves 10,000:1 digital PWM dimming at
100Hz with fast NPN current sources driving up to 10 LEDs in each channel.
100:1 LED dimming can also be done with analog control of the CTRL1-3 pin.
The
step-down switching frequency is programmable between 200kHz and 1MHz and is
synchronizable to an external clock. The LT3596 also provides maximum LED
brightness while adhering to manufacturers' specifications for thermal
derating. The derate temperature is programmed by placing a negative
temperature coefficient (NTC) resistor on the master control pin.
The LT3596
adaptively controls VOUT in order to achieve optimal efficiency.
Other features include: 1.5% LED current matching between channels, open LED
reporting, shorted LED pin protection and reporting, programmable LED current
and programmable temperature protection.
Features
300mA Buck Regulator,
Drives Up to 10 LEDs per Channel with Fast NPN Current Sources
Fast Current Sources for
<1μs Pulse Widths (10,000:1 True Color PWMTM Dimming at 100Hz)
LEDs Disconnected in
Shutdown
Adaptive VOUT
for Increased Efficiency
6V to 60V Input Voltage
Range
±1.5% Accurate LED
Current Matching
External Resistors Set
LED Current for Each Channel
Requires No External
Compensation
Programmable Switching
Frequency (200kHz to 1MHz)
Synchronizable to
External Clock
Open, Short LED Detection
and Reporting
Programmable LED Thermal
Derating and Reporting
Programmable Temperature
Protection
5mm × 8mm Thermally
Enhanced QFN Package with 0.6mm High Voltage Pin Spacing