TPS923655 Datasheet | Texas Instruments

Features - 4.5-V to 65-V wide input range - LED mon cathode connection - Integrated 150-mΩ MOSFET with typical 3-A / 6.5- A current limit - Optional switching frequency: 100 k Hz to 2.2 MHz - Spread spectrum for TPS923653 and TPS923655 - Advanced dimming options: - Analog dimming (256:1) - Fast PWM dimming (150-ns pulse width) - Hybrid and flexible dimming (2,000:1 at 20-k Hz PWM, 10,000:1 at 4-k Hz PWM, 1,000,000:1 at 120-Hz PWM) - CC / CV charging mode - Full protection features : - LED open and short protection - Switching FET open and short protection - External ponent failure protection - Cycle-by-cycle current limit - Thermal shutdown - Fault output (open drain) - Configurable thermal foldback curve - VSON, WSON and SOT23 package options 2 Applications - Constant illumination: - Indoor, outdoor, professional lighting - Medical, surgical lighting - Projector, laser TV, printer, IP camera - Instant illumination: - Machine vision, camera flash - Fire alarm, strobe - CC and CV source: - LCD backlighting - Battery charging - TEC control 3 Description The TPS92365x family is a 2-A / 4-A nonsynchronous Boost / Buck-Boost LED driver with 4.5V to 65-V wide input range. By integrating the lowside NMOS switch, the device is capable of driving LEDs as well as charging batteries with high power density and high efficiency. The family also supports mon cathode connection and single layer PCB design. The switching frequency is configurable from 100 k Hz to 2.2 MHz with optional spread spectrum feature for better EMI performance. The TPS92365x family supports four dimming options, including analog, PWM, hybrid and flexible dimming. Each dimming method can be configured through the PWM and ADIM input pins by means of simple high and low signals. The family adopts an adaptive off-time current mode control along with smart and accurate sampling to enable inductive fast dimming (IFD) and achieve high dimming accuracy. The TPS92365x family also provides multiple systematic...