MAX17079_10 Datasheet, PDF (1/12 Pages) Maxim Integrated Products – 4-Level or 2-Level Logic to High-Voltage Level Shifter for TFT LCD TV Display

19-2812; Rev 1; 3/10
EVAALVUAAILTAIOBNLEKIT
4-Level or 2-Level Logic to High-Voltage
Level Shifter for TFT LCD TV Display
General Description
The MAX17079 is a 7-channel logic-level input to high-
voltage output level shifter. Each channel has two
inputs plus a shared enable input. Each channel has
two outputs, which can be set to five output levels. Two
outputs are complementary to each other. The five out-
put levels are set by five supply rails that are common
to all 14 outputs.
The five supply rails include a typical TFT VCOM rail.
Two upper rails are always greater than VCOM, with
VH1 always greater than VH2. The two lower rails are
always less than VCOM, with VL1 always less than VL2.
Other supply rails are VLS (the typical TFT AVDD sup-
ply) and VCC (the logic supply). The MAX17079 can
also be configured as a two-level voltage shifter.
When EN is low, all 14 outputs connect to VCOM, and
when EN is high, the outputs are determined by their
inputs. The logic inputs are driven by the timing con-
troller. The output switches are typically 3Ω with low
propagation delays and fast rise times. The MAX17079
has a minimum dead time to prevent shoot-through cur-
rents between supplies. The MAX17079 has thermal
shutdown to protect against overheating, VCC under-
voltage lockout (UVLO), and VLS UVLO.
The MAX17079 is in a 40-pin, 6mm x 6mm, thin QFN
package, with exposed pad and a maximum height of
0.8mm.
Applications
TFT LCD TV Panels
Pin Configuration
TOP VIEW
30 29 28 27 26 25 24 23 22 21
OB1 31
20 OA7
OA1 32
ST 33
EP
19 OB7
18 VCOM
VH1 34
17 VL1
VH2 35
VLS 36
MAX17079
16 VL2
15 DGND
AGND 37
14 B7
VCC 38
13 A7
EN 39
12 B6
CH 40
11 A6
1 2 3 4 5 6 7 8 9 10
EP = EXPOSED PAD
THIN QFN
(6mm x 6mm)
Features
♦ 7-Channel Logic-Level Input to High-Voltage
Output Level Shifter
♦ Complementary Outputs in Each Channel
♦ VLS Input Range from 10V to 18V
♦ VCC Input Range from 2.3V to 3.6V
♦ 2-Level or 4-Level Operation
♦ Sequential or Combinational Logic
♦ 3Ω Output Switches
♦ 5-Level Output
♦ Short Propagation Delay (80ns typ)
♦ Fast Rise Time (30ns typ)
♦ Built-In Dead Time to Prevent Shoot-Through
♦ Thermal Shutdown
♦ VLS and VCC Undervoltage Lockout
Ordering Information
PART
TEMP RANGE
PIN-
PACKAGE
PKG
CODE
MAX17079GTL+
-40°C to +105°C
40 TQFN-EP*
(6mm x 6mm)
T4066+5
*EP = Exposed paddle.
Simplified Operating Circuit
3.3V 10V 7V 6V 5V 2V 15V
SYSTEM
VCC VH1 VH2 VCOM VL2 VL1 VLS
OA1
OB1
A1
OA2
B1
OB2
A2
OA3
B2
A3
OB3
B3
OA4
A4
OB4
MAX17079
B4
OA5
A5
B5
OB5
A6
OA6
B6
OB6
A7
OA7
B7
AGND
OB7
EN
DGND CH ST
PANEL
________________________________________________________________ Maxim Integrated Products 1
For pricing, delivery, and ordering information, please contact Maxim Direct at 1-888-629-4642,
or visit Maxim’s website at www.maxim-ic.com.