MAX1554ETA+T Maxim Integrated Products, MAX1554ETA+T Datasheet - Page 5

• Manufacturer Part Number: MAX1554ETA+T
• Description: IC LED DRIVR WHITE BCKLGT 8-TDFN
• Manufacturer: Maxim Integrated Products
• Type: Backlight, White LEDr

Specifications of MAX1554ETA+T

• Constant Current: Yes
• Topology: PWM, Step-Up (Boost)
• Number Of Outputs: 1
• Internal Driver: Yes
• Type - Primary: Backlight
• Type - Secondary: White LED
• Voltage - Supply: 3.15 V ~ 5.5 V
• Voltage - Output: 40V
• Mounting Type: Surface Mount
• Package / Case: 8-TDFN Exposed Pad
• Operating Temperature: -40°C ~ 85°C
• Current - Output / Channel: 970mA
• Internal Switch(s): Yes
• Number Of Segments: 10
• Operating Supply Voltage: 3.15 V to 5.5 V
• Maximum Power Dissipation: 1951 mW
• Maximum Operating Temperature: + 85 C
• Mounting Style: SMD/SMT
• Minimum Operating Temperature: - 40 C
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Frequency: -
• Efficiency: -
• Lead Free Status / Rohs Status: Details

(MAX1553 driving six white LEDs, V
V
V
OUT
V
V
OUT
V
LX
EN
FB
I
L
L1 = 47µH, 4700pF CAPACITOR ACROSS LEDs
L1 = 22µH
3.75V Li+ BATTERY, 18mA OUTPUT)
STARTUP/SHUTDOWN WAVEFORMS
_______________________________________________________________________________________
(CONTINUOUS OPERATION,
SWITCHING WAVEFORMS
40ms/div
2µs/div
CC
Converters for 2 to 10 White LEDs
= V
EN
MAX1553/54 toc10
MAX1553/54 toc12
= 3.6V, Circuit of Figure 1, T
Typical Operating Characteristics (continued)
10V/div
200mV/div
200mA/div
5V/div
200mV/div
10V/div
High-Efficiency, 40V Step-Up
A
= +25°C, unless otherwise noted.)
V
V
V
V
OUT
OUT
BRT
V
FB
LX
I
L
L1 = 22µH,
V
L1 = 47µH, 4700pF CAPACITOR ACROSS LEDs
BRT
3.75V Li+ BATTERY, 10mA OUTPUT)
= 0.5V TO 1.25V TO O.5V
(DISCONTINUOUS OPERATION,
SWITCHING WAVEFORMS
BRT STEP RESPONSE
20ms/div
2µs/div
MAX1553/54 toc13
MAX1553/54 toc11
1V/div
200mV/div
2V/div
10V/div
200mV/div
200mA/div
5