MAX8645YETI+ Maxim Integrated Products, MAX8645YETI+ Datasheet - Page 6

• 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

1x/1.5x/2x White LED Charge Pumps with Two
LDOs in 4mm x 4mm TQFN
(V
6
IN
_______________________________________________________________________________________
= V
EN_
= 3.6V, circuit of Figure 2, T
V
V
ENM_
2000
V
I
200
OUT
OUT
OUT
V
20
I
IN
IN
2
1
OPERATING WAVEFORMS (1.5x MODE)
INDIVIDUAL FLASH LED CURRENT
STARTUP AND SHUTDOWN
6 MAIN LEDS AT 20mA EACH
6 MAIN LEDS AT 20mA EACH
MAIN LED RESPONSE
vs. R
R
400ns/div
SETF
1ms/div
10
A
SETF
(kΩ)
= +25°C, unless otherwise noted.)
MAX8645Y toc15
Typical Operating Characteristics (continued)
MAX8645Y toc17
100
50mV/div
AC-COUPLED
20mV/div
AC-COUPLED
2mA/div
AC-COUPLED
5V/div
0V
100mA/div
0A
5V/div
0V
V
V
V
V
I
OUT
OUT
OUT
OUT
ENF
V
V
I
I
I
IN
IN
IN
IN
IN
OPERATING WAVEFORMS (2x MODE)
OPERATING WAVEFORMS (1x MODE)
STARTUP AND SHUTDOWN
6 MAIN LEDS AT 20mA EACH,
6 MAIN LEDS AT 20mA EACH
FLASH LED RESPONSE
6 MAIN LEDS AT 20mA EACH,
FLASH AT 400mA TOTAL
400mA TOTAL FLASH
400ns/div
400ns/div
1ms/div
MAX8645Y toc16
MAX8645Y toc18
MAX8645Y toc14
50mV/div
AC-COUPLED
20mV/div
AC-COUPLED
2mA/div
AC-COUPLED
50mV/div
AC-COUPLED
20mV/div
AC-COUPLED
2mA/div
AC-COUPLED
5V/div
0V
500mA/div
0A
500mA/div
0A
5V/div
0V