SGM3736 Datasheet, PDF (5/12 Pages) SG Micro Corp – PWM Dimming, 38V Step-Up LED Driver

SGM3736
PWM Dimming, 38V Step-Up LED Driver
TYPICAL PERFORMANCE CHARACTERISTICS
T_A = +25℃, L = 10μH, C_IN = 10μF, C_OUT = 0.47μF, unless otherwise noted.
Feedback Voltage vs. Temperature
215
V_IN = 3.6V
210
205
200
195
190
185
-50 -25
0
25 50
Temperature (℃)
75 100
Efficiency vs. Input Voltage
90
I_LED = 20mA, L = 10μH
88
86
84
82
10LEDs (32V)
80
2.5
3
3.5
4
4.5
5
5.5
Input Voltage (V)
215
210
205
200
195
190
185
2.5
Feedback Voltage vs. Input Voltage
3
3.5
4
4.5
5
5.5
Input Voltage (V)
Efficiency vs. Input Voltage
90
I_LED = 20mA, L = 22μH
88
86
84
82
10LEDs (32V)
80
2.5
3
3.5
4
4.5
5
5.5
Input Voltage (V)
Efficiency vs. Output Current
100
V_IN = 3.6V, L = 10μH
90
80
70
60
50
0
10LEDs (32V)
5
10 15 20 25 30
Output Current (mA)
LED Current vs. Duty Cycle
25
V_IN = 3.6V, I_LED = 20mA, L = 10μH, 6 LEDs
20
f_PWM = 20kHz
15
10
5
f_PWM = 2kHz
0
0
20
40
60
80
100
Duty Cycle (%)
SG Micro Corp
5
www.sg-micro.com