MAX1599ETA+T Maxim Integrated Products, MAX1599ETA+T Datasheet - Page 4

• Manufacturer Part Number: MAX1599ETA+T
• Description: IC LED DRIVR WHITE BCKLGT 8-TDFN
• Manufacturer: Maxim Integrated Products
• Type: Backlight, White LEDr

Specifications of MAX1599ETA+T

• Constant Current: Yes
• Topology: PWM, Step-Up (Boost)
• Number Of Outputs: 1
• Internal Driver: Yes
• Type - Primary: Backlight
• Type - Secondary: White LED
• Frequency: 400kHz ~ 600kHz
• Voltage - Supply: 2.6 V ~ 5.5 V
• Voltage - Output: 26V
• Mounting Type: Surface Mount
• Package / Case: 8-TDFN Exposed Pad
• Operating Temperature: -40°C ~ 85°C
• Current - Output / Channel: 700mA
• Internal Switch(s): Yes
• Efficiency: 87%
• Number Of Segments: 6
• Operating Supply Voltage: 2.6 V to 5.5 V
• Maximum Power Dissipation: 1950 mW
• Maximum Operating Temperature: + 85 C
• Mounting Style: SMD/SMT
• Minimum Operating Temperature: - 40 C
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

High-Efficiency, 26V Step-Up Converters
for Two to Six White LEDs
(Circuit of Figure 1, V
T
4
A
= +25°C, unless otherwise noted.)
100
100
90
80
70
60
50
40
_______________________________________________________________________________________
90
80
70
60
50
40
40
35
30
25
20
15
10
5
0
0
MAX1599 EFFICIENCY vs. LED CURRENT
0
0
6 LEDs
5
INPUT RIPPLE vs. INDUCTANCE
EFFICIENCY vs. LED CURRENT
10 15 20 25
4 LEDs
(vs. NUMBER of LEDs)
(vs. NUMBER OF LEDs)
5
5
LED CURRENT (mA)
LED CURRENT (mA)
6 LEDs
INDUCTANCE (µH)
MAX1561
2 LEDs
2 LEDs
IN
10
10
4 LEDs
= 3.6V, I
30 35 40 45 50
15
15
LED
= 15mA, L1 = 22µH, C
20
20
100
100
90
80
70
60
50
40
90
80
70
60
50
40
6
5
4
3
2
1
0
0
MAX1599 EFFICIENCY vs. LED CURRENT
0
0
EFFICIENCY vs. LED CURRENT
1
2.7V
INPUT RIPPLE SPECTRUM
2.7V
3.6V
2
IN
(vs. INPUT VOLTAGE)
5
(vs. INPUT VOLTAGE)
5
IN
IN
IN
LED CURRENT (mA)
LED CURRENT (mA)
3
4.2V
FREQUENCY (MHz)
= 2.2µF, C
MAX1561
4.2V
4
IN
10
10
IN
5
Typical Operating Characteristics
3.6V
6
IN
OUT
7
15
15
8
= 0.1µF, C
9
20
20
10
COMP
100
100
90
80
70
60
50
40
90
80
70
60
50
40
25
20
15
10
5
0
0
MAX1599 EFFICIENCY vs. LED CURRENT
0
0
= 0.1µF, R
DIRECT-PWM DIMMING DUTY CYCLE (%)
10µH
10
LED CURRENT vs. DIRECT-PWM
EFFICIENCY vs. LED CURRENT
20 30 40 50
47µH
DIMMING DUTY CYCLE
5
5
(vs. INDUCTANCE)
(vs. INDUCTANCE)
LED CURRENT (mA)
LED CURRENT (mA)
22µH
47µH
SENSE
MAX1561
22µH
10
10
V
200Hz < FREQ < 200kHz
CTRL
= 7.5Ω, 4 LEDs,
60 70 80 90 100
= SQUARE WAVE
15
15
4.7µH
20
20