1 Features
• 4.5-V to 65-V wide input range
• LED common cathode connection
• Integrated 150-mΩ MOSFET with typical 3-A / 6.5-
A current limit
• Optional switching frequency: 100 kHz 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-kHz
PWM, 10,000:1 at 4-kHz 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 component 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 4.5-
V 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
common cathode connection and single layer PCB
design. The switching frequency is configurable from
100 kHz 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 protections, including LED open and short,
sense resistor open and short, configurable thermal
foldback and thermal shutdown. A Fault output
sends out acknowledge signals as soon as any fault
condition is detected.