Datasheet AL3644 (Diodes) - 6

AL3644 Typical Performance Characteristics
(@TA = +25°C, VIN = 3.6V, VHWEN=VIN, CIN=2×10mF, COUT=2×10mF and L=1mH, unless otherwise specified.)
Current Source Regulation Voltage vs. Temperature Current Source Regulation Voltage vs. Temperature
400 350 AL3644 AL3644TT, I =360mA LED1/2 370 Torch Mode, I =179mA 325 LED1/2 Torch Mode 340 Flash Mode, I =729mA Flash Mode LED1/2 300 310 275
T
280
C
250 250 (mV) (mV)
U
HR HR 220
D
V V 225
O
190 200
R
160
P
175 130
W
100 150
E
-40 -20 0 20 40 60 80 100 120 -40 -20 0 20 40 60 80 100 120
N
Ambient Temperature (oC) Ambient Temperature(oC)
NTC Comparator Trip Thres hold vs. Temperature Over Voltage Protection Threshold vs. Temperature
1.0 5.0 0.9 ON Threshold 4.9 OFF Threshold 0.8 4.8 0.7 4.7 V =0.6V TRIP 0.6 4.6 (V) 0.5 (V) 4.5 P I P R T V 0.4 V O 4.4 V 0.3 4.3 0.2 4.2 0.1 4.1 0.0 4.0 -40 -20 0 20 40 60 80 100 120 -40 -20 0 20 40 60 80 100 120 Ambient Temperature (oC) Ambient Temperature (oC)
Under Voltage Lockout Threshold vs. Temperature Input Voltage Flash Monitor Trip Threshold vs. Temperature
3.0 3.00 ON Threshold 2.9 OFF Threshold 2.95 2.8 2.90 V =2.9V IVFM 2.7 2.85 2.6 2.80 (V) 2.5 (V) 2.75 O L M V F U VI 2.4 2.70 V V 2.3 2.65 2.2 2.60 2.1 2.55 2.0 2.50 -40 -20 0 20 40 60 80 100 120 -40 -20 0 20 40 60 80 100 120 Ambient Temperature (oC) Ambient Temperature (oC) AL3644 6 of 23 July 2019 Document number: DS41558 Rev. 1 - 2
www.diodes.com
© Diodes Incorporated