LPU-200C Datasheet, PDF (4/8 Pages) PAIRUI GROUP INC. – Constant current LED Drivers

Constant current LED Drivers
For outdoor use
LPU-200C Series, 200Watt
ELECTRICAL
PWM Dimming
The PWM dimming is a dimming manner that can be used to dim the output current via the duty cycle of PWM signal.
The dimming range is 100% Iout to 5% Iout. When the duty cycle is 100%, the output current reaches 100% Iout, and the
output current maintains 5% Iout when the duty cycle below 5%.
When the PWM signal is low the driver will shut down and it will recovery when the duty cycle goes above 5%.
See “PWM Dimming Curve” for detailed information.
PWM Frequency
F_PWM
---
0.1 --
2
KHz
High Level Voltage of
PWM Signal
Lower Level Voltage
of PWM Signal
Minimum Output
Current
V_PWM-High
V_PWM-Low
I_OUT-MIN
---
---
When duty cycle below 5%
Timer Dimming
4
-- 12
V
0
--
1
V
--
5
--
% of I_out
The Timer Dimming is designed with time controlled dimming function, it will dim to 50% of rated output current after
operating six hours.
See “ T Type Dimming Curve” for detailed information.
Full Load Operated
Time
T_{FULL-LOAD-TTYPE} ^{Note1: The dimming time and}
dimming current can be customized
5.5
6
6.5
Note2: Timing shut down function
Dim Output Current _{IOUT-MIN-TTYPE can be customized}
45 50 55
Hrs
% of I_out
LED Board Temperature Detection(Optional)
The LED board temperature detection input can be connected to a thermistor (NTC) to realize a LED Board Over Temperature
Protection and prevent the LED lamp from damage or luminous decay at high temperature.
The thermistor should be located on the LED assembly to monitor its temperature. If the temperature exceeds the
predetermined LED OTP point, the output current of the driver is automatically reduced to regulate the temperature of the
LED board at a safe level.
See “LED OTP Current Reduction Curve” for detailed information.
Thermistor
When the thermistor resistance less
Resistance Value
that Start Current
R_LEDOTP
than this value the output current --
4
--
KΩ
start reduce.
Reduction
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Date: 04/29/2014