Instruction Manual
MAX1583
White LED Camera-Flash
Boost Converter
_______________________________________________________________________________________ 3
Note 1: All units are 100% production tested at T
A
= +25°C. Limits over the operating temperature range are guaranteed by design.
ELECTRICAL CHARACTERISTICS (continued)
(V
IN
= V
EN1
= 3.0V, V
EN2
= 0V, V
OUT
= 20V, C
OUT
= 10µF, T
A
= -40°C to +85°C, unless otherwise noted. Typical values are at
T
A
= +25°C. Note 1)
PARAMETER CONDITIONS
MIN TYP MAX
UNITS
EN1 and EN2 Input High Threshold V
IN
= 2.6V to 5.5V 1.6 V
EN1 and EN2 Input Low Threshold V
IN
= 2.6V to 5.5V 0.6 V
T
A
= +25°C
0.01
1
EN1 and EN2 Input Leakage EN_ = IN
T
A
= +85°C 0.1
µA
LX On-Resistance I
LX
= 200mA 1.3
2.25
Ω
T
A
= +25°C
0.01
5
LX Leakage V
LX
= 28V
T
A
= +85°C 0.1
µA
T
A
= 0°C to +85°C 0.8 1.0 1.2
Operating Frequency
T
A
= -40°C to +85°C
0.75 1.25
MHz
Maximum Duty Cycle Switching 90 94 %
Minimum Duty Cycle Pulse skipping 0 %
Typical Operating Characteristics
(V
IN
= 3.3V, C
RES
= 10µF, MAX1583Y, 4 LEDs in a 2 x 2 array, T
A
= +25°C, unless otherwise noted.)
EFFICIENCY vs. INPUT VOLTAGE
(MOVIE MODE)
MAX1583 toc01
INPUT VOLTAGE (V)
EFFICIENCY (%)
3.93.63.3
10
20
30
40
50
60
70
80
90
0
3.0 4.2
A: MAX1583X
B: MAX1583Y
C: MAX1583Z
I
LOAD
= 30mA
C
B
A
MAXIMUM BOOST OUTPUT CURRENT
vs. INPUT VOLTAGE (MAX1583X)
MAX1583 toc02
V
IN
(V)
I
OUT
(mA)
5.04.54.03.53.0
100
200
300
400
500
600
700
0
2.5 5.5
A
B
C
D
A: 1 LED
B: 2 LEDs
C: 3 LEDs
D: 4 LEDs
MAXIMUM BOOST OUTPUT CURRENT
vs. INPUT VOLTAGE
(MAX1583Y)
MAX1583 toc03
V
IN
(V)
I
OUT
(mA)
5.04.54.03.53.0
100
200
300
400
500
600
0
2.5 5.5
A
B
C
D
A: 1 LED
B: 2 LEDs
C: 3 LEDs
D: 4 LEDs