Datasheet Analog Devices LT3956IUHE#TRPBF

LT3956
80VIN, 80VOUT
Constant-Current,
Constant-Voltage Converter
Description Features 3000:1 True Color PWMTM Dimming
Wide Input Voltage Range: 4.5V to 80V
Output Voltage Up to 80V
Internal 3.3A/84V Switch
Constant-Current and Constant-Voltage Regulation
250mV High Side Current Sense
Drives LEDs in Boost, Buck Mode, Buck-Boost Mode,
SEPIC or Flyback Topology
n Adjustable Frequency: 100kHz to 1MHz
n Open LED Protectio Programmable Undervoltage Lockout with Hysteresis
n Constant-Voltage Loop Status Pi PWM Disconnect Switch Driver
n CTRL Pin Adjusts High Side Current Sense Threshold
n Low Shutdown Current: 1.2V or ILED = (VCTRL –100mV)/(4 • RLED)
if VCTRL < 1V. Input bias current is typically 20µA. Below
3V, ISN is an input to the short-circuit protection feature
that forces GATE to 0V if ISP exceeds ISN by more than
350mV (typ).
ISP: Connection point for the positive terminal of the current
feedback resistor. Input bias current for this pin depends …