FORENEX FI2055S LED Driving Board User Manual
- June 9, 2024
- FORENEX
Table of Contents
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
- 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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