FAN5345 Series

LED Driver, Series Boost, with Single-wire Digital Interface

Catalog

LED Driver, Series Boost, with Single-wire Digital Interface

Part	Applications	Dimming	Mounting Type	Current - Output / Channel [custom]	Frequency	Type	Topology	Package / Case	Supplier Device Package	Operating Temperature [Max]	Operating Temperature [Min]	Voltage - Supply (Max)	Voltage - Supply (Min) [Min]	Number of Outputs	Voltage - Output [Max]	Voltage - Output [Min]
ON Semiconductor FAN5345S30X	Backlight	Single-Wire	Surface Mount	25 mA	1.2 MHz	DC DC Regulator	Step-Up (Boost)	SOT-23-6 Thin TSOT-23-6	SuperSOT™-6	85 °C	-40 °C	5.5 V	2.5 V	1	28.5 V	6.2 V
ON Semiconductor FAN5345S20X	Backlight	Single-Wire	Surface Mount	25 mA	1.2 MHz	DC DC Regulator	Step-Up (Boost)	SOT-23-6 Thin TSOT-23-6	SuperSOT™-6	85 °C	-40 °C	5.5 V	2.5 V	1	18.5 V	6.2 V
ON Semiconductor FAN5345S20X	Backlight	Single-Wire	Surface Mount	25 mA	1.2 MHz	DC DC Regulator	Step-Up (Boost)	SOT-23-6 Thin TSOT-23-6	SuperSOT™-6	85 °C	-40 °C	5.5 V	2.5 V	1	18.5 V	6.2 V
ON Semiconductor FAN5345S30X	Backlight	Single-Wire	Surface Mount	25 mA	1.2 MHz	DC DC Regulator	Step-Up (Boost)	SOT-23-6 Thin TSOT-23-6	SuperSOT™-6	85 °C	-40 °C	5.5 V	2.5 V	1	28.5 V	6.2 V

Catalog

LED Driver, Series Boost, with Single-wire Digital Interface

Key Features

• ￭ Asynchronous Boost Converter￭ Drives LEDs in Series:

• FAN5345S20X: 20 V Output

• FAN5345S30X: 30 V Output￭ 2.5 V to 5.5 V Input Voltage Range￭ Single-Wire Digital Control Interface to Set LED Brightness Levels

• 32 Linear Steps￭ 1.2 MHz Fixed Switching Frequency￭ Soft-Start Capability￭ Input Under-Voltage Lockout (UVLO)￭ Output Over-Voltage Protection (OVP)￭ Short-Circuit Detection￭ Thermal Shutdown (TSD) Protection

Description

The FAN5345 is an asynchronous constant-current LED driver that drives LEDs in series to ensure equal brightness for all the LEDs. FAN5345S20X has an output voltage of 20 V and can drive up to 5 LEDs in series. FAN5345S30X has an output voltage of 30 V and drive up to 8 LEDs in series. Optimized for small form-factor applications, the 1.2 MHz fixed switching frequency allows the use of small inductors and capacitors.The FAN5345 uses a simple single-wire digital control interface to program the brightness levels of the LEDs in 32 linear steps by applying digital pulses.For safety, the device features integrated over-voltage, over-current, short-circuit detection, and thermal-shutdown protection. In addition, input under-voltage lockout protection is triggered if the battery voltage is too low.