MAX1996AETI+ Maxim Integrated Products, MAX1996AETI+ Datasheet - Page 7

• Manufacturer Part Number: MAX1996AETI+
• Description: Display Drivers CCFL Backlight Controller
• Manufacturer: Maxim Integrated Products

Specifications of MAX1996AETI+

• Lead Free Status / Rohs Status: Details

(V
BATT
PIN
1
2
3
4
5
6
= 12V, V
5.40
5.35
5.30
5.25
5.20
5.15
5.10
CTL
CRF/SDA
0.01
MINDAC
= V
NAME
MODE
GND
_______________________________________________________________________________________
SHUTDOWN
ILIM
REF
NORMAL OPERATION
CRF,
V
0.1
CC
V
MINDAC
LOAD REGULATION
Current-Limit Threshold Adjustment. Bias ILIM with a resistive voltage-divider between REF or V
and GND. The current-limit threshold measured between LX_ and GND is 1/5th the voltage at ILIM;
ILIM adjustment range is 0V to 3V. Connect ILIM to V
0.2V.
2V Reference Output. Bypass REF to GND with a 0.1µF capacitor. REF is discharged to GND when
shut down.
DAC Zero-Scale Input. V
DPWM by connecting MINDAC to V
System Ground. The GND input to the maximum and minimum current-limit comparators. The
comparators sense the low-side FET NL1 and NL2 for zero-current crossing and current limit.
Interface Selection Input and Sync Input for DPWM Chopping. The average voltage on the MODE
pin selects one of three CCFL brightness control interfaces:
An AC clocking signal superimposed on the DC average MODE pin voltage can be used to
synchronize the DPWM chopping frequency. See Synchronizing the DPWM Frequency.
Reference and Serial Data Input. In analog interface mode, pin 6 is the reference input to the 5-bit
brightness control ADC. Bypass CRF to GND with a 0.1µF capacitor. In SMBus interface mode,
SDA is an SMBus serial data input/open-drain output.
I
LOAD
MODE = V
MODE = GND enables the analog interface (positive analog interface mode), V
minimum brightness.
MODE = REF enables the analog interface (reverse analog interface mode), V
maximum brightness.
1
(mA)
= 1V, MODE = GND, circuit of Figure 1, Table 4.)
Range, CCFL Backlight Controller
High-Efficiency, Wide Brightness
10
CC
MAX1996 toc10
enables SMBus serial interface.
Typical Operating Characteristics (continued)
100
4.6
4.5
4.4
4.3
4.2
4.1
4.0
MINDAC
sets the D/A converter’s minimum-scale output voltage. Disable
CC
.
5.36
5.35
5.34
5.33
5.32
5.31
FUNCTION
-40
NORMAL OPERATION
CC
-15
V
CC
to set the default current-limit threshold to
TEMPERATURE (°C)
vs. TEMPERATURE
10
SHUTDOWN
35
60
Pin Description
MAX1996 toc11
85
CTL/SCL
CTL/SCL
4.60
4.55
4.50
4.45
4.40
4.35
= 0V sets
= 0V sets
CC
7