MAX8759ETI+T Maxim Integrated Products, MAX8759ETI+T Datasheet - Page 8

• Manufacturer Part Number: MAX8759ETI+T
• Description: IC CNTRL CCFL BACKLIGHT 28TQFN
• Manufacturer: Maxim Integrated Products
• Type: CCFL Controllerr

Specifications of MAX8759ETI+T

• Frequency: 30 ~ 80 kHz
• Current - Supply: 2.5mA
• Voltage - Supply: 4.5 V ~ 28 V
• Operating Temperature: -40°C ~ 85°C
• Package / Case: 28-TQFN Exposed Pad
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Current - Output: -
• Lead Free Status / Rohs Status: Details

Low-Cost, SMBus, CCFL Backlight Controller
(Circuit of Figure 1, V
8
350
300
250
200
150
100
100
50
80
60
40
20
0
_______________________________________________________________________________________
50
0
A: VFB, 2V/div
B: COMP, 500mV/div
vs. SMBus BRIGHTNESS SETTING
100
LIMITING AND TIMEOUT
NORMALIZED BRIGHTNESS
OPEN-LAMP VOLTAGE
20
BRIGHTNESS SETTING (%)
DPWM FREQUENCY
150
vs. R
40
R
200ms/div
FREQ
IN
200
FREQ
(kΩ)
= 12V, V
60
250
C: TFLT, 5V/div
MAX8759 toc010
80
300
CC
= V
350
100
DD
C
A
B
, T
A
= +25°C, unless otherwise noted.)
100
80
60
40
20
Typical Operating Characteristics (continued)
SECONDARY SHORT-CIRCUIT PROTECTION
8
7
6
5
4
3
0
0
5
A: ISEC, 2V/div
B: COMP, 1V/div
NORMALIZED BRIGHTNESS
0.2
vs. PWMI DUTY CYCLE
RMS LAMP CURRENT
10
vs. INPUT VOLTAGE
AND TIMEOUT
INPUT VOLTAGE (V)
PWMI DUTY RATIO
0.4
2ms/div
15
0.6
I
I
I
I
LAMP
LAMP
LAMP
LAMP
C: TFLT, 1V/div
20
= 7mA
= 6mA
= 5mA
= 4mA
0.8
MAX8759 toc011
1.0
25
C
A
B
100
6.2
6.1
6.0
5.9
5.8
5.7
5.6
80
70
60
50
40
30
80
60
40
20
0
5
0
5
RMS LAMP CURRENT (I
NORMALIZED BRIGHTNESS
0.4
SWITCHING FREQUENCY
10
10
vs. INPUT VOLTAGE
vs. INPUT VOLTAGE
vs. ALS VOLTAGE
INPUT VOLTAGE (V)
0.8
V
V
ALS
IN
15
15
(V)
(V)
1.2
LAMP
20
20
1.6
= 6mA)
25
2.0
25