MAX8645YETI+ Maxim Integrated Products, MAX8645YETI+ Datasheet - Page 11

• Manufacturer Part Number: MAX8645YETI+
• Description: IC LED DRVR WHITE BCKLGT 28-TQFN
• Manufacturer: Maxim Integrated Products
• Type: Backlight, White LEDr

Specifications of MAX8645YETI+

• Constant Current: Yes
• Topology: Linear (LDO), Switched Capacitor (Charge Pump)
• Number Of Outputs: 8
• Internal Driver: Yes
• Type - Primary: Backlight
• Type - Secondary: White LED
• Frequency: 1MHz
• Voltage - Supply: 2.7 V ~ 5.5 V
• Voltage - Output: 5.5V
• Mounting Type: Surface Mount
• Package / Case: 28-TQFN Exposed Pad
• Operating Temperature: -40°C ~ 85°C
• Current - Output / Channel: 200mA
• Internal Switch(s): Yes
• Efficiency: 85%
• Number Of Segments: 8
• Low Level Output Current: 400000 uA (Typ)
• Operating Supply Voltage: 2.7 V to 5.5 V
• Maximum Supply Current: 5.5 mA
• Maximum Power Dissipation: 1666 mW
• Maximum Operating Temperature: + 85 C
• Mounting Style: SMD/SMT
• Minimum Operating Temperature: - 40 C
• Led Driver Application: Backlighting And Flash, Digital Cameras And Camcorders
• No. Of Outputs: 8
• Output Current: 200mA
• Output Voltage: 5.5V
• Input Voltage: 2.7V To 5.5V
• Rohs Compliant: Yes
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

Figure 2. Dimming Using Single-Wire, Serial-Pulse Interface
Figure 3. Providing Increased LED Current per LED
1x/1.5x/2x White LED Charge Pumps with Two
______________________________________________________________________________________
INPUT
2.7V TO 5.5V
INPUT
2.7V TO 5.5V
ON/OFF AND
AND DIMMING
FLASH ON/OFF
SELECTION
SELECTION
AND DIMMING
MAIN ON/OFF
VOLTAGE
VOLTAGE
10μF
10μF
C1
ON/OFF
6.81kΩ
6.81kΩ
R
SETM
PIN
IN
GND
ENM2
ENM1
ENF
ENLDO
P1
P2
PIN
IN
GND
ENM2
ENM1
ENF
ENLDO
P1
P2
SETM
SETM
C1P
C1P
4.12kΩ
4.12kΩ
R
1μF
1μF
C3
SETF
C1N
C1N
SETF
SETF
MAX8645X
MAX8645Y
MAX8645X
MAX8645Y
REFBP
REFBP
LDOs in 4mm x 4mm TQFN
C2P
C2P
0.01μF
C8
0.01μF
1μF
1μF
C4
C2N
C2N
PGND
LDO1
LDO2
PGND
LDO1
LDO2
OUT
OUT
M1
M2
M3
M4
M5
M6
M1
M2
M3
M4
M5
M6
F1
F2
F1
F2
1μF
C7
1μF
10μF
C5
10μF
UP TO 480mA
OUTPUT
UP TO 480mA
1μF
C6
1μF
MAIN
OUTPUT
MAIN
FLASH
FLASH
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