ZXLD1360 Datasheet, PDF (14/28 Pages) Zetex Semiconductors – 1A LED driver with internal switch

ZXLD1360
Typical operating conditions
ZXLD1360 Response Time vs Temperature
Typical minimum LX 'on' and 'off' time
350
300
250
200
150
100
50
0
-55 -35 -15
5
25
45
65
Ambient Temperature (°C)
Min LX on Min LX off
85 105 125
Vadj vs Temperature
1.24
L = 470uH, Rs = 0.33 Ohms
1.235
1.23
1.225
1.22
1.215
12V, single LED
12V, three LED
24V, single LED
24V, three LED
1.21
-55
-35
-15
5
25
45
65
85
105
125
Ambient Temperature ( ^oC )
0.5
0.4
0.3
0.2
0.1
0
-0.1
-0.2
-0.3
-0.4
-0.5
-55
Output current change vs Temperature
V_IN = 12V, L= 470uH, Rs = 0.33 Ohms
12V, single LED
12V, three LED
-35
-15
5
25
45
65
85
105
125
Ambient Temperature ( ^oC )
Lx Switch "On" Resistance vs Temperature
0.80
0.70
0.60
0.50
0.40
0.30
0.20
-50
0
50
100
150
200
Ambient Temperature (^oC )
100.4
100.2
100
99.8
99.6
99.4
99.2
99
98.8
98.6
98.4
-55
Voltage across Rsense (0.333 Ohm) vs Temperature
-35
-15
5
25
45
65
85
105
Ambient Temperature ( ^oC )
24V, single LED
12V, three LED
12V, single LED
24V, three LED
125
Output current change vs Temperature
V_IN = 24V, L= 470uH, Rs = 0.33 Ohms
0.4
0.2
0
-0.2
-0.4
24V, single LED
24V, three LED
-0.6
-0.8
-1
-55
-35
-15
5
25
45
65
85
105 125
Ambient Temperature ( ^oC )
Issue 1 - March 2007
14
© Zetex Semiconductors plc 2007
www.zetex.com