Linear LED Drivers | FAN5345

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

Obsolete

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Overview

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.

  • ￭ 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

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FAN5345S20X

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Obsolete

CAD Model

Pb

A

H

P

TSOT-23-6

419BL

1

260

REEL

3000

N

5.5

25

5

1

Price N/A

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FAN5345S30X

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Obsolete

CAD Model

Pb

A

H

P

TSOT-23-6

419BL

1

260

REEL

3000

N

5.5

25

8

1

Price N/A

More Details

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Reliability Data

Die Related Summary Data

Device: FAN5345S30X

Equivalent to wafer fab process: CMOS SUB

Product Technology

Product Technology

Equivalent Device-Hours

MTBF/MTTF in Hours

FITS

CMOS SUB

2

920154574

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Data is based on the following assumptions.

Note: The temperature and confidence level may be adjusted to your requirements.

Disclaimer: A reliability FIT rate calculated using this tool shall not be used for any functional safety purpose. In case a raw FIT rate needs to be estimated for a component which is targeted to be used in a safety critical application (i.e. compliant to ISO 26262 standard) it should be calculated according to generic safety standards (IEC62380, IEC61709, SN29500, FIDES, etc.)

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