Datasheet Linear Technology LT3954IUHE#TRPBF — Datenblatt

LT3954
40VIN LED Converter with
Internal PWM Generator
FEATURES n n n n n n n n n n n DESCRIPTION 3000:1 True Color PWMв„ў Dimming for LEDs
Wide VIN Range: 4.5V to 40V
Rail-to-Rail Current Sense Range: 0V to 40V
Internal 40V/5A Switch
Programmable PWM Dimming Signal Generator
Constant Current (В±3%) and Constant-Voltage
(В±2%) Regulation
Accurate Analog Dimming
Drives LEDs in Boost, SEPIC, CUK, Buck Mode,
Buck-Boost Mode, or Flyback Configuration
Output Short-Circuit Protected Boost
Open LED Protection and Reporting
Adjustable Switching Frequency: 100kHz to 1MHz
Programmable VIN UVLO with Hysteresis
C/10 Indication for Battery Chargers
Low Shutdown Current: 1.2V or ILED = (CTRL – 100mV)/(4 RLED). If ISN is greater than INTVCC, input bias current
is typically 20ОјA flowing into the pin. Below INTVCC, ISN
bias current decreases until it flows out of the pin.
ISP (Pin 28): Connection Point for the Positive Terminal of
the Current Feedback Resistor. Input bias current depends …