19-4936; Rev 0; 9/09
TION KIT
EVALUA BLE
AVAILA
Dual High-Voltage Scan Drivers for TFT LCD
General Description
The MAX17121 includes two high-voltage level-shifting
scan drivers for TFT panel integrated gate logic. Each
scan driver has two channels that switch complementa-
rily. The scan-driver outputs swing from +40V to -30V and
can swiftly drive capacitive loads. In order to save power,
the scan driver’s complementary outputs share the
charge of their capacitive load before they change states.
The MAX17121 is available in a 24-pin, 4mm x 4mm, thin
QFN package with a maximum thickness of 0.8mm for
ultra-thin LCD panels.
S
+40V to -30V Output Swing Range
S
Fast Slew Rate for High Capacitive Load
S
Load Charge Sharing for Power Saving
S
24-Pin, 4mm x 4mm, Thin QFN Package
Features
MAX17121
Applications
Notebook Computer Displays
LCD Monitor and Small TV Panels
PART
MAX17121ETG+
*EP
= Exposed pad.
Ordering Information
TEMP RANGE
-40°C to +85°C
PIN-PACKAGE
24 TQFN-EP*
Simplified Operating Circuit
V
VON
= 25V
V
VOFF
= -15V
Pin Configuration
TOP VIEW
CKVBCS1
CKVCS1
CKV1
GND
VON
19
18
17
16
VOFF
N.C.
VDD
CKVBCS1
CKVCS1
CKV1
EQUIVALENT LOAD OF DISPLAY PANEL
VOFF
24
N.C.
N.C.
N.C.
23
22
21
CKVB1
STVP
CKVB2
200I
CKVBCS2
CKVCS2
200I
CKVB1
STVP
CKVB2
CKVBCS2
CKVCS2
1
2
3
4
5
6
7
STV
8
CPV1
9
CPV2
10
N.C.
11
EN
12
DLY
*EP
MAX17121
N.C.
MAX17121
N.C.
20
VON
GND
15
14
13
DISH
GND
N.C.
CKV2
STV
CKV2
V
VDD
= 3.3V
CPV1
CPV2
DISH
GND
STV
T-CON
EN
CPV1
CPV2
VDD
DLY
EN
*EP = EXPOSED PAD
_______________________________________________________________
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.
Dual High-Voltage Scan Drivers for TFT LCD
MAX17121
ABSOLUTE MAXIMUM RATINGS
VDD to GND ............................................................-0.3V to +4V
CPV1, CPV2, STV, EN to GND ................................-0.3V to +4V
DLY to GND.............................................-0.3V to (V
VDD
+ 0.3V)
DISH to GND ..............................................-6V to (V
VDD
+ 0.3V)
VON to GND ..........................................................-0.3V to +45V
VOFF to GND .......................................................-35V to + 0.3V
VON to VOFF ...................................................................... +65V
CKV1, CKV2, CKVB1, CKVB2,
to VOFF ............................................... -0.3V to (V
VON
+ 0.3V)
STVP to VOFF ......................................... -0.3V to (V
VON
+ 0.3V)
CKVCS1, CKVCS2 to VOFF ................... -0.3V to (V
VON
+ 0.3V)
CKVBCS1, CKVBCS2 to VOFF .............. -0.3V to (V
VON
+ 0.3V)
Continuous Power Dissipation (T
A
= +70NC)
24-Pin, 4mm x 4mm Thin QFN
(derate 27.8mW/NC above +70NC)..........................2222.2mW
Operating Temperature Range .......................... -40NC to +85NC
Junction Temperature .....................................................+150NC
Storage Temperature Range............................ -65NC to +150NC
Lead Temperature (soldering, 10s) ................................+300NC
Stresses beyond those listed under “Absolute Maximum Ratings” may cause permanent damage to the device. These are stress ratings only, and functional
operation of the device at these or any other conditions beyond those indicated in the operational sections of the specifications is not implied. Exposure to absolute
maximum rating conditions for extended periods may affect device reliability.
ELECTRICAL CHARACTERISTICS
(VVDD = VEN = +3.3V, VVON = 25V, VVOFF = -15V, STV = CPV1 = CPV2 = GND,
T
A
= 0NC to +85NC,
unless otherwise noted.
Typical values are at T
A
= +25NC.)
PARAMETER
VDD Input Voltage Range
VDD UV Lockout
VDD Quiescent Current
Thermal Shutdown
VON Input Voltage Range
VON Supply Current
VOFF Input Voltage Range
VOFF Supply Current
VON-to-VOFF Voltage Range
VON UV Lockout
CKV_, CKVB_ Output Low
CKV_, CKVB_ Output High
CPV_ Rising to CKV_ Rising
CPV_ Rising to CKV_ Falling
CPV_ Rising to CKVB_ Rising
CPV_ Rising to CKVB_ Falling
CPV_ Falling to CKVCS_ Rising
CPV_ Falling to CKVCS_ Falling
CPV_ Falling to CKVCBS_ Rising
VON rising
VON falling
I(CKV_) = -20mA
I(CKV_) = 20mA
t
R
, Figure 4, V
STV
= 0V
t
F
, Figure 4, V
STV
= 0V
t
R
, Figure 4, V
STV
= 0V
t
F
, Figure 4, V
STV
= 0V
t
CSR
, Figure 4, V
STV
= 0V
t
CSF
, Figure 4, V
STV
= 0V
t
CSR
, Figure 4, V
STV
= 0V
10
12
11
5
9
100
100
100
100
100
100
100
100
10
18
150
150
150
150
150
150
150
150
V
EN
= 3.3V
EN = GND
V
EN
= 3.3V
EN = GND
-30
200
200
Rising, hysteresis = 150mV
V
EN
= 3.3V
EN = GND
Rising edge, hysteresis = 15NC
15
300
300
CONDITIONS
MIN
2.2
2
250
250
+160
40
600
600
-3
300
300
65
13
TYP
MAX
3.6
2.15
400
400
UNITS
V
V
FA
NC
V
FA
V
FA
V
V
I
I
ns
ns
ns
ns
ns
ns
ns
ns
CPV_ Falling to CKVBCS_ Falling t
CSF
, Figure 4, V
STV
= 0V
2
______________________________________________________________________________________
Dual High-Voltage Scan Drivers for TFT LCD
ELECTRICAL CHARACTERISTICS (continued)
(VVDD = VEN = +3.3V, VVON = 25V, VVOFF = -15V, STV = CPV1 = CPV2 = GND,
T
A
= 0NC to +85NC,
unless otherwise noted.
Typical values are at T
A
= +25NC.)
PARAMETER
CKV_, CKVB_ Slew Rate Rising
CONDITIONS
STV = GND, C
LOAD
= 15nF, R
LOAD
= 100I, 15% to 85%
(Note 1)
STV = GND, C
LOAD
= 4.7nF, 20% to 80%
CKV_, CKVB_ Slew Rate Falling
STV = GND, C
LOAD
= 15nF, R
LOAD
= 100I, 85% to 15%
(Note 1)
STV = GND, C
LOAD
= 4.7nF, 80% to 20%
CKV_, CKVB_ Slew Rate Rising
STV = VDD, C
LOAD
= 15nF, R
LOAD
= 100I, 15% to 85%
(Note 1)
STV = VDD, C
LOAD
= 4.7nF, 20% to 80%
CKV_, CKVB_ Slew Rate Falling
Three-State Output Current
STVP Output Low
STVP Output High
STV Rising to STVP Rising
STV Falling to STVP Falling
STVP Slew Rate Rising
STVP Slew Rate Falling
CPV_ Input Frequency
Input Low Voltage
Input High Voltage
Input Hysteresis
Input-Bias Current
DISH Low Voltage
DISH High Voltage
DISH Hysteresis
DISH Input Impedance
DISH Switch Resistance
DLY Output Current
DLY Sink Current
DLY Enable Threshold
Startup Delay
V
DISH
= -2V
V
DISH
= -2V
V
DISH
= 0V
DLY = GND
EN = GND, V
DLY
= 0.4V
Rising, hysteresis = 100mV
C(DLY) = 0.1FF
3
5
1.60
-0.5
CPV_, STV, EN, 2.2V
P
V
VDD
P
3.6V
CPV_, STV, EN, 2.2V
P
V
VDD
P
3.6V
CPV_, STV, EN
V
STV_
= 0V or V
VDD
; V
CPV_
= 0V or V
VDD
(Note 2)
-1
-0.66
-0.65
10
300
200
1
4
8
1.65
40
1.70
5
600
500
2.1
250
+1
-1.5
C1 = 4.7nF, R1 = 200W (Note 1)
C1 = 4.7nF
C1 = 4.7nF, R1 = 200W (Note 1)
C1 = 4.7nF
50
50
50
50
STV = VDD, C
LOAD
= 15nF, R
LOAD
= 100I, 85% to 15%
(Note 1)
STV = VDD, C
LOAD
= 4.7nF, 80% to 20%
CKV = midsupply (Note 2)
I(STVP) = -20mA
I(STVP) = 20mA
CKVCS_-to-CKVBCS_ Resistance I(CKVCS_ to CKVBCS_) = 10mA
MIN
100
100
100
100
100
100
100
100
-1
40
5
18
100
100
1000
100
2000
100
85
0.8
TYP
1400
160
2000
160
1400
160
2400
160
+1
100
10
35
200
200
FA
I
I
I
ns
ns
V/Fs
V/Fs
kHz
V
V
mV
FA
V
V
mV
kI
I
MI
FA
mA
V
ms
V/Fs
V/Fs
V/Fs
MAX
UNITS
V/Fs
MAX17121
_______________________________________________________________________________________
3
Dual High-Voltage Scan Drivers for TFT LCD
MAX17121
ELECTRICAL CHARACTERISTICS
(VVDD = VEN = +3.3V, VVON = 25V, VVOFF = -15V, STV = CPV1 = CPV2 = GND,
T
A
= -40NC to +85NC,
unless otherwise noted.)
(Note 2)
PARAMETER
VDD Input Voltage Range
VDD UV Lockout
VDD Quiescent Current
Thermal Shutdown
VON Input Voltage Range
VON Supply Current
VOFF Input Voltage Range
VOFF Supply Current
VON-to-VOFF Voltage Range
VON UV Lockout
CKV_, CKVB_ Output Low
CKV_, CKVB_ Output High
CPV_ Rising to CKV_ Rising
CPV_ Rising to CKV_ Falling
CPV_ Rising to CKVB_ Rising
CPV_ Rising to CKVB_ Falling
CPV_ Falling to CKVCS_ Rising
CPV_ Falling to CKVCS_ Falling
CPV_ Falling to CKVCBS_ Rising
CPV_ Falling to CKVBCS_ Falling
CKV_, CKVB_ Slew Rate Rising
VON rising
VON falling
I(CKV_) = -20mA
I(CKV_) = 20mA
t
R
, Figure 4, V
STV
= 0V
t
F
, Figure 4, V
STV
= 0V
t
R
, Figure 4, V
STV
= 0V
t
F
, Figure 4, V
STV
= 0V
t
CSR
, Figure 4, V
STV
= 0V
t
CSF
, Figure 4, V
STV
= 0V
t
CSR
, Figure 4, V
STV
= 0V
t
CSF
, Figure 4, V
STV
= 0V
STV = GND, C
LOAD
= 15nF, R
LOAD
=
100I, 15% to 85% (Note 2)
STV = GND, C
LOAD
= 4.7nF, 20% to 80%
CKV_, CKVB_ Slew Rate Falling
STV = GND, C
LOAD
= 15nF, R
LOAD
=
100I, 85% to 15% (Note 2)
STV = GND, C
LOAD
= 4.7nF, 80% to 20%
CKV_, CKVB_ Slew Rate Rising
STV = VDD, C
LOAD
= 15nF, R
LOAD
=
100I, 15% to 85% (Note 2)
STV = VDD, C
LOAD
= 4.7nF, 20% to 80%
CKV_, CKVB_ Slew Rate Falling
STV = VDD, C
LOAD
= 15nF, R
LOAD
=
100I, 85% to 15% (Note 2)
STV = VDD, C
LOAD
= 4.7nF, 80% to 20%
100
100
100
100
100
100
100
100
V/Fs
V/Fs
V/Fs
10
10
18
150
150
150
150
150
150
150
150
V
EN
= 3.3V
EN = GND
V
EN
= 3.3V
EN = GND
-30
Rising, hysteresis = 150mV
V
EN
= 3.3V
EN = GND
Rising edge, hysteresis = 15NC
15
40
600
600
-3
300
300
65
13
CONDITIONS
MIN
2.2
TYP
MAX
3.6
2.15
400
400
UNITS
V
V
FA
NC
V
FA
V
FA
V
V
I
I
ns
ns
ns
ns
ns
ns
ns
ns
V/Fs
4
______________________________________________________________________________________
Dual High-Voltage Scan Drivers for TFT LCD
ELECTRICAL CHARACTERISTICS (continued)
(VVDD = VEN = +3.3V, VVON = 25V, VVOFF = -15V, STV = CPV1 = CPV2 = GND,
T
A
= -40NC to +85NC,
unless otherwise noted.)
(Note 2)
PARAMETER
CKVCS_-to-CMVBCS Resistance
STVP Output Low
STVP Output High
STV Rising to STVP Rising
STV Falling to STVP Falling
STVP Slew Rate Rising
STVP Slew Rate Falling
CPV_ Input Frequency
Input Low Voltage
Input High Voltage
Input Hysteresis
DISH Low Voltage
DISH High Voltage
DISH Hysteresis
DISH Input Impedance
DISH Switch Resistance
DLY Output Current
DLY Sink Current
DLY Enable Threshold
V
DISH
= -2V
V
DISH
= -2V
DLY = GND
EN = GND, V
DLY
= 0.4V
Rising
3
5
1.60
1.70
600
500
5
-0.5
CPV_, STV, EN, 2.2V
P
V
VDD
P
3.6V
CPV_, STV, EN, 2.2V
P
V
VDD
P
3.6V
CPV_, STV, EN
-1.5
2.1
C
L
= 4.7nF
C
L
= 4.7nF
50
50
85
0.8
CONDITIONS
I(CKVCS_-to-CKVBCS) = 10mA
I(STVP) = -20mA
I(STVP) = 20mA
MIN
TYP
MAX
100
10
35
200
200
UNITS
I
I
I
ns
ns
V/Fs
V/Fs
kHz
V
V
mV
V
V
mV
kI
I
FA
mA
V
MAX17121
Note 1:
Guaranteed by design. Not production tested.
Note 2:
Limits are 100% production tested at T
A
= +25NC. Maximum and minimum limits over temperature are guaranteed by
design and characterization.
_______________________________________________________________________________________
5
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