MAX8790AETP+T Maxim Integrated Products, MAX8790AETP+T Datasheet - Page 7

• Manufacturer Part Number: MAX8790AETP+T
• Description: IC LED DRVR WHITE BCKLGT 20-TQFN
• Manufacturer: Maxim Integrated Products
• Type: Backlight, White LEDr

Specifications of MAX8790AETP+T

• Topology: PWM, Step-Up (Boost)
• Number Of Outputs: 6
• Internal Driver: No
• Type - Primary: Backlight
• Type - Secondary: White LED
• Frequency: 1MHz
• Voltage - Supply: 4.5 V ~ 5.5 V, 5.5 V ~ 26 V
• Voltage - Output: 5V
• Mounting Type: Surface Mount
• Package / Case: 20-TQFN Exposed Pad
• Operating Temperature: -40°C ~ 85°C
• Current - Output / Channel: 27mA
• Internal Switch(s): Yes
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Efficiency: -
• Lead Free Status / Rohs Status: Details

(Circuit configuration 1, V
(BRT = 15%, ANALOG DIMMING)
SWITCHING WAVEFORMS
Current Balancing for LCD Panel Applications
1μs/div
_______________________________________________________________________________________
(BRT = 1% AT 200Hz, ANALOG DIMMING)
(BRT = 1% AT 200Hz, DPWM DIMMING)
Six-String White LED Driver with Active
IN
MAX8790A toc10
LED CURRENT WAVEFORMS
LED CURRENT WAVEFORMS
= 12V, V
V
10V/div
0V
I
500mA/div
0mA
L
LX
1ms/div
1ms/div
SHDN
= V
IN
MAX8790A toc13
MAX8790A toc15
, LEDs = 8 series x 6 parallel strings, ISET = V
(BRT = 100%, DPWM DIMMING)
Typical Operating Characteristics (continued)
STARTUP WAVEFORMS
0V
0V
0mA
0A
0V
0V
0mA
0mA
4ms/div
BRT
5V/div
V
5V/div
I
100mA/div
I
1A/div
BRT
5V/div
V
2V/div
I
50mA/div
I
500mA/div
LED
L
LED
L
FB1
FB1
MAX8790A toc11
(BRT = 50% AT 200Hz, ANALOG DIMMING)
0V
0V
0V
0A
SHDN
5V/div
V
20V/div
V
2V/div
I
1A/div
L
(BRT = 100%, LED OPEN ON FB3)
OUT
CCV
LED-OPEN FAULT PROTECTION
LED CURRENT WAVEFORMS
(BRT = 50% AT 200Hz, DPWM DIMMING)
CC
20ms/div
1ms/div
LED CURRENT WAVEFORMS
, T
A
= +25°C, unless otherwise noted.)
2ms/div
MAX8790A toc14
MAX8790A toc16
0V
0V
0mA
0A
0V
0V
0V
0A
MAX8790A toc12
BRT
5V/div
V
1V/div
I
50mA/div
I
1A/div
V
1V/div
V
10V/div
V
20V/div
I
1A/div
LED
L
L
FB1
FB3
FB1
OUT
0V
0V
0mA
0A
BRT
5V/div
V
5V/div
I
100mA/div
I
1A/div
LED
L
FB1
7