FORENEX FI2055S LED Driving Board User Manual

June 9, 2024
FORENEX

FORENEX FI2055S LED Driving Board

Model Number:

  • FI2055SA‐3S9P with LED connector W2
  • FI2055SB‐3S9P with LED connector W1
  • FI2055SC‐3S9P with LED connector W4
  • Document No:    doc‐FI2055S‐V10
  • PCB Bare Board: PB20552‐V10
  • Approved By
  • Checked By
  • Prepared By

Revision histories

Rev. No. Date Substantial Changes
1.0 2017/2 First issue.
   
   
   
   
   
   
   
   
   
   
   
   

General Description

The front‐end of FI2055S series is a highly efficient DC/DC to provide a wide input of voltage range. The back‐end is a constant‐current LED driver which can drive a number of LEDs in series & parallel configuration.

Features

  • Wide input rang : DC 5V.
  • Provide output (Typ.) 1.95W.
  • Flexible digital(PWM) for dimming control.
  • The Soft‐start function minimize inrush current while powering up.
  • Multiple LED Protections:
    • LED Open/ Short protection
    • Over‐current Limit protection
    • Over‐temperature protection
    • Over‐voltage protection
    • Under voltage lockout (UVLO)
  • Low profile and light weight:   75 mm(L) x 17 mm(W) x 6.6 mm(H).
  • RoHS Compliant.

Item| Symbol| Conditions| MIN.| TYP.| MAX.| Unit
---|---|---|---|---|---|---
Input Voltage| Vin| GND=0V| 4.75| 5| 5.25| V
Input Current| Iin|  | ‐| 390| ‐| mA
LED Output Voltage per string| Vled| Vin = TYP.| ‐| 9.6| ‐| V
LED Total Output Current| Iled|  | ‐| 180| ‐| mA
Backlight on/off| BL_EN| DC high| 1.5| ‐| 5| V
DC low| ‐| ‐| 0.8| V

Brightness Control

|

BL_PWM

| Frequency| 100| 300| 20k| Hz
PWM of duty| 1(dark)|  | 100(bright)| %
Amplitude| 1.5| ‐| 5| VIH
Operating Temperature| Top| Ha=80%RH| ‐30|  | 80| ℃
Storage Temperature| Tstg| Ha=90%RH| ‐40|  | 120| ℃

Pin Assignment

Input Connector(W3)

Connector: A1250WR‐S‐6P (equal as molex 53261‐0671), 1.25mm , side entry

Pin num| Description| I/O| Remark
Pin1| Vin| P|
Pin2| Vin| P|
Pin3| GND| P| Note1
Pin4| GND| P|
Pin5| BL_EN| I|
Pin6| BL_PWM| I|

LED Backlight Connector (W1) for FI2055SB series

Connector: (JST‐S2B‐2.0mm) or equivalent, side entry

Pin num| Description| I/O| Remark
Pin1| LED Anode(+)| P| Vled
Pin2| LED Cathode(‐)| P|

LED Backlight Connector (W2) for FI2055SA series

Connector: A1250WR‐S‐2P(equal as molex 51021‐0200), 1.25mm, side entry

Pin num| Description| I/O| Remark
Pin1| LED Anode(+)| P| Vled
Pin2| LED Cathode(‐)| P|
Pin3| LED Anode(+)| P| Vled

LED Backlight Connector (W4) for FI2055SC series

Connector: A3500WR‐S‐2P(equal as JST‐SM02B), 3.5mm, side entry

Pin num| Description| I/O| Remark
Pin1| LED Anode(+)| P| Vled
Pin2| LED Cathode(‐)| P|

Mechanical specification

FORENEX-FI2055S-LED-Driving-Board-FIG-1

  • TEL: 886-4-22969886
  • FAX: 886-4-22969887
  • Forenex Technology Co., Ltd 5F-2,No212, Sec.4, Wenxin Rd., North Dist, Taichung City 404, Taiwan(R.O.C.)

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