MAX8901BETA+T Maxim Integrated Products, MAX8901BETA+T Datasheet - Page 12

• Manufacturer Part Number: MAX8901BETA+T
• Description: IC LED DRIVR WHITE BCKLGT 8-TDFN
• Manufacturer: Maxim Integrated Products
• Type: Backlight, White LEDr

Specifications of MAX8901BETA+T

• Constant Current: Yes
• Topology: PWM, Step-Up (Boost)
• Number Of Outputs: 1
• Internal Driver: Yes
• Type - Primary: Backlight
• Type - Secondary: White LED
• Frequency: 700kHz ~ 800kHz
• Voltage - Supply: 2.6 V ~ 5.5 V
• Voltage - Output: 24V
• Mounting Type: Surface Mount
• Package / Case: 8-TDFN Exposed Pad
• Operating Temperature: -40°C ~ 85°C
• Current - Output / Channel: 25mA
• Internal Switch(s): Yes
• Efficiency: 91%
• Operating Supply Voltage: 2.6 V to 5.5 V
• Maximum Supply Current: 185 uA
• Maximum Power Dissipation: 953 mW
• Maximum Operating Temperature: + 85 C
• Mounting Style: SMD/SMT
• Minimum Operating Temperature: - 40 C
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

Highest Efficiency Supply for 2 to 6
Series WLEDs in a 2mm x 2mm TDFN Package
12
Figure 4. MAX8901A Application Circuit
Figure 5. MAX8901B Application Circuit
______________________________________________________________________________________
SERIAL-PULSE
CONTROL
DIMMING
2.6V TO 5.5V
PWM DIMMING
2.6V TO 5.5V
CONTROL
INPUT
INPUT
1μF
1μF
C1
C1
0.022μF
0.022μF
0Ω
C3
C3
R1
7
6
7
3
2
3
6
2
IN
COMP
GND
ON
IN
COMP
GND
ON
MAX8901B
MAX8901A
22μH
22μH
EP
EP
L1
L1
PGND
PGND
OVP
OVP
CS
LX
CS
LX
1
4
5
1
5
8
4
8
D1
D1
C2
1μF
C2
0.1μF
UP TO 25V
UP TO 25V
OUTPUT
OUTPUT
R1 (R
20Ω
CS
D2–D7
)