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MAX17121ETG+-MAX17121ETG+T
Dual High-Voltage Scan Drivers for TFT LCD
Dual High-Voltage Scan Drivers for TFT LCD
MAX17121
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.
Applications
Notebook Computer Displays
LCD Monitor and Small TV Panels
Features
S +40V to -30V Output Swing RangeFast Slew Rate for High Capacitive LoadLoad Charge Sharing for Power Saving24-Pin, 4mm x 4mm, Thin QFN Package
19-4936; Rev 0; 9/09
*EP = Exposed pad.
Ordering Information
Pin Configuration Simplified Operating Circuit
EVALUATION KIT
AVAILABLE
PARTTEMP RANGEPIN-PACKAGE
MAX17121ETG+-40°C to +85°C24 TQFN-EP*
CPV1
N.C.
DLY
STV
CKVCS1GNDN.C.CKVBCS1VON8
CKVBCS2
*EP
*EP = EXPOSED PAD19
CKVCS2
CKV2
VDD
DISH
GND
N.C.
MAX17121
CPV2
CKV1
CKVB217N.C.STVP18VOFFCKVB1
TOP VIEW221112
CKVBCS1
CKVCS1
CKV1
VONGND
VOFFCPV1CPV2DLYGNDDISHVDD
N.C.
N.C.
N.C.
N.C.
CKVB1
STVP
CKVB2
CKVBCS2
CKVCS2
CKV2
STV
VVON = 25V
VVDD = 3.3V
VVOFF = -15V
200I
200I
EQUIVALENT LOAD OF DISPLAY PANEL
T-CON
STV
CPV2
CPV1
MAX17121
Dual High-Voltage Scan Drivers for TFT LCD
MAX17121
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.
VDD to GND ............................................................-0.3V to +4V
CPV1, CPV2, STV, EN to GND ................................-0.3V to +4V
DLY to GND .............................................-0.3V to (VVDD + 0.3V)
DISH to GND ..............................................-6V to (VVDD + 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 (VVON + 0.3V)
STVP to VOFF .........................................-0.3V to (VVON + 0.3V)
CKVCS1, CKVCS2 to VOFF ...................-0.3V to (VVON + 0.3V)
CKVBCS1, CKVBCS2 to VOFF ..............-0.3V to (VVON + 0.3V)
Continuous Power Dissipation (TA = +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
ELECTRICAL CHARACTERISTICS
(VVDD = VEN = +3.3V, VVON = 25V, VVOFF = -15V, STV = CPV1 = CPV2 = GND, TA = 0NC to +85NC, unless otherwise noted.
Typical values are at TA = +25NC.)
ABSOLUTE MAXIMUM RATINGS
PARAMETERCONDITIONSMINTYPMAXUNITS
VDD Input Voltage Range2.23.6V
VDD UV LockoutRising, hysteresis = 150mV22.15V
VDD Quiescent CurrentVEN = 3.3V250400FAEN = GND250400
Thermal ShutdownRising edge, hysteresis = 15NC+160NC
VON Input Voltage Range1540V
VON Supply CurrentVEN = 3.3V300600FAEN = GND300600
VOFF Input Voltage Range-30-3V
VOFF Supply CurrentVEN = 3.3V200300FAEN = GND200300
VON-to-VOFF Voltage Range65V
VON UV LockoutVON rising1213VVON falling1011
CKV_, CKVB_ Output LowI(CKV_) = -20mA510I
CKV_, CKVB_ Output HighI(CKV_) = 20mA918I
CPV_ Rising to CKV_ Rising tR, Figure 4, VSTV = 0V100150ns
CPV_ Rising to CKV_ Falling tF, Figure 4, VSTV = 0V100150ns
CPV_ Rising to CKVB_ Rising tR, Figure 4, VSTV = 0V100150ns
CPV_ Rising to CKVB_ Falling tF, Figure 4, VSTV = 0V100150ns
CPV_ Falling to CKVCS_ RisingtCSR, Figure 4, VSTV = 0V100150ns
CPV_ Falling to CKVCS_ FallingtCSF, Figure 4, VSTV = 0V100150ns
CPV_ Falling to CKVCBS_ RisingtCSR, Figure 4, VSTV = 0V100150ns
CPV_ Falling to CKVBCS_ FallingtCSF, Figure 4, VSTV = 0V100150ns
Dual High-Voltage Scan Drivers for TFT LCD
MAX17121
ELECTRICAL CHARACTERISTICS (continued)
(VVDD = VEN = +3.3V, VVON = 25V, VVOFF = -15V, STV = CPV1 = CPV2 = GND, TA = 0NC to +85NC, unless otherwise noted.
Typical values are at TA = +25NC.)
PARAMETERCONDITIONSMINTYPMAXUNITS
CKV_, CKVB_ Slew Rate Rising
STV = GND, CLOAD = 15nF, RLOAD = 100I, 15% to 85%
(Note 1) 1001400V/Fs
STV = GND, CLOAD = 4.7nF, 20% to 80%100160
CKV_, CKVB_ Slew Rate Falling
STV = GND, CLOAD = 15nF, RLOAD = 100I, 85% to 15%
(Note 1) 1002000V/Fs
STV = GND, CLOAD = 4.7nF, 80% to 20%100160
CKV_, CKVB_ Slew Rate Rising
STV = VDD, CLOAD = 15nF, RLOAD = 100I, 15% to 85%
(Note 1) 1001400V/Fs
STV = VDD, CLOAD = 4.7nF, 20% to 80%100160
CKV_, CKVB_ Slew Rate Falling
STV = VDD, CLOAD = 15nF, RLOAD = 100I, 85% to 15%
(Note 1) 1002400V/Fs
STV = VDD, CLOAD = 4.7nF, 80% to 20%100160
Three-State Output CurrentCKV = midsupply (Note 2)-1+1FA
CKVCS_-to-CKVBCS_ ResistanceI(CKVCS_ to CKVBCS_) = 10mA40100I
STVP Output LowI(STVP) = -20mA510I
STVP Output HighI(STVP) = 20mA1835I
STV Rising to STVP Rising 100200ns
STV Falling to STVP Falling 100200ns
STVP Slew Rate RisingC1 = 4.7nF, R1 = 200W (Note 1)501000V/FsC1 = 4.7nF50100
STVP Slew Rate FallingC1 = 4.7nF, R1 = 200W (Note 1)502000V/FsC1 = 4.7nF50100
CPV_ Input Frequency 85kHz
Input Low VoltageCPV_, STV, EN, 2.2V P VVDD P 3.6V0.8V
Input High VoltageCPV_, STV, EN, 2.2V P VVDD P 3.6V2.1V
Input HysteresisCPV_, STV, EN250mV
Input-Bias CurrentVSTV_ = 0V or VVDD; VCPV_ = 0V or VVDD (Note 2)-1+1FA
DISH Low Voltage-0.66-1.5V
DISH High Voltage-0.5-0.65V
DISH Hysteresis10mV
DISH Input ImpedanceVDISH = -2V300600kI
DISH Switch ResistanceVDISH = -2V200500I
VDISH = 0V1MI
DLY Output CurrentDLY = GND 345FA
DLY Sink CurrentEN = GND, VDLY = 0.4V58mA
DLY Enable ThresholdRising, hysteresis = 100mV1.601.651.70V
Startup DelayC(DLY) = 0.1FF40ms
Dual High-Voltage Scan Drivers for TFT LCD
MAX17121
ELECTRICAL CHARACTERISTICS
(VVDD = VEN = +3.3V, VVON = 25V, VVOFF = -15V, STV = CPV1 = CPV2 = GND, TA = -40NC to +85NC, unless otherwise noted.)
(Note 2)
PARAMETERCONDITIONSMINTYPMAXUNITS
VDD Input Voltage Range2.23.6V
VDD UV LockoutRising, hysteresis = 150mV2.15V
VDD Quiescent CurrentVEN = 3.3V400FAEN = GND400
Thermal ShutdownRising edge, hysteresis = 15NCNC
VON Input Voltage Range1540V
VON Supply CurrentVEN = 3.3V600FAEN = GND600
VOFF Input Voltage Range-30-3V
VOFF Supply CurrentVEN = 3.3V300FAEN = GND300
VON-to-VOFF Voltage Range65V
VON UV LockoutVON rising13VVON falling10
CKV_, CKVB_ Output LowI(CKV_) = -20mA10I
CKV_, CKVB_ Output HighI(CKV_) = 20mA18I
CPV_ Rising to CKV_ Rising tR, Figure 4, VSTV = 0V150ns
CPV_ Rising to CKV_ Falling tF, Figure 4, VSTV = 0V150ns
CPV_ Rising to CKVB_ Rising tR, Figure 4, VSTV = 0V150ns
CPV_ Rising to CKVB_ Falling tF, Figure 4, VSTV = 0V150ns
CPV_ Falling to CKVCS_ RisingtCSR, Figure 4, VSTV = 0V150ns
CPV_ Falling to CKVCS_ FallingtCSF, Figure 4, VSTV = 0V150ns
CPV_ Falling to CKVCBS_ RisingtCSR, Figure 4, VSTV = 0V150ns
CPV_ Falling to CKVBCS_ FallingtCSF, Figure 4, VSTV = 0V150ns
CKV_, CKVB_ Slew Rate Rising
STV = GND, CLOAD = 15nF, RLOAD =
100I, 15% to 85% (Note 2)100V/Fs
STV = GND, CLOAD = 4.7nF, 20% to 80%100
CKV_, CKVB_ Slew Rate Falling
STV = GND, CLOAD = 15nF, RLOAD =
100I, 85% to 15% (Note 2) 100V/Fs
STV = GND, CLOAD = 4.7nF, 80% to 20%100
CKV_, CKVB_ Slew Rate Rising
STV = VDD, CLOAD = 15nF, RLOAD =
100I, 15% to 85% (Note 2) 100V/Fs
STV = VDD, CLOAD = 4.7nF, 20% to 80%100
CKV_, CKVB_ Slew Rate Falling
STV = VDD, CLOAD = 15nF, RLOAD =
100I, 85% to 15% (Note 2) 100V/Fs
STV = VDD, CLOAD = 4.7nF, 80% to 20%100
Dual High-Voltage Scan Drivers for TFT LCD
MAX17121
ELECTRICAL CHARACTERISTICS (continued)
(VVDD = VEN = +3.3V, VVON = 25V, VVOFF = -15V, STV = CPV1 = CPV2 = GND, TA = -40NC to +85NC, unless otherwise noted.)
(Note 2)
Note 1: Guaranteed by design. Not production tested.
Note 2: Limits are 100% production tested at TA = +25NC. Maximum and minimum limits over temperature are guaranteed by
design and characterization.
PARAMETERCONDITIONSMINTYPMAXUNITS
CKVCS_-to-CMVBCS ResistanceI(CKVCS_-to-CKVBCS) = 10mA100I
STVP Output LowI(STVP) = -20mA10I
STVP Output HighI(STVP) = 20mA35I
STV Rising to STVP Rising 200ns
STV Falling to STVP Falling 200ns
STVP Slew Rate RisingCL = 4.7nF50V/Fs
STVP Slew Rate FallingCL = 4.7nF50V/Fs
CPV_ Input Frequency 85kHz
Input Low VoltageCPV_, STV, EN, 2.2V P VVDD P 3.6V0.8V
Input High VoltageCPV_, STV, EN, 2.2V P VVDD P 3.6V2.1V
Input HysteresisCPV_, STV, ENmV
DISH Low Voltage-1.5V
DISH High Voltage-0.5V
DISH HysteresismV
DISH Input ImpedanceVDISH = -2V600kI
DISH Switch ResistanceVDISH = -2V500I
DLY Output CurrentDLY = GND 35FA
DLY Sink CurrentEN = GND, VDLY = 0.4V5mA
DLY Enable ThresholdRising1.601.70V
Dual High-Voltage Scan Drivers for TFT LCD
MAX17121
Typical Operating Characteristics
(Circuit of Figure 1, VVDD = VEN = 3.3V, VVON = 25V, VVOFF = -15V, TA = +25NC, unless otherwise noted.)
STVP OUTPUT WAVEFORM
WITH STV LOGIC INPUT
MAX17121 toc01
STV
5V/div
STVP
10V/div
4µs/div
CKV_ AND CKVB_ OUTPUT
WAVEFORMS WITH CPV LOGIC INPUT
(STV = 0V, CLOAD = 5nF, RLOAD = 50I,
RCS = 200I)
MAX17121 toc02
CPV_
5V/div
CKV_
20V/div
CKVB_
20V/div
4µs/div
STV-TO-STVP RISING EDGE
PROPAGATION DELAY
(CLOAD = 5nF, RLOAD = 200I)
MAX17121 toc03
STV
5V/div
STVP
10V/div
100ns/div
STV-TO-STVP FALLING EDGE
PROPAGATION DELAY
(CLOAD = 5nF, RLOAD = 200I)
MAX17121 toc04
STV
5V/div
STVP
10V/div
100ns/div
STVP SLEW RATE ON RISING EDGE
(CLOAD = 5nF, RLOAD = 200I)
MAX17121 toc05
STV
5V/div
STVP
10V/div
20ns/div
STVP SLEW RATE ON FALLING EDGE
(CLOAD = 5nF, RLOAD = 200I)
MAX17121 toc06
STV
5V/div
STVP
10V/div
20ns/div
VIN = 3.3V, GON = 25V, GOFF = 15V
Dual High-Voltage Scan Drivers for TFT LCD
MAX17121
Typical Operating Characteristics (continued)
(Circuit of Figure 1, VVDD = VEN = 3.3V, VVON = 25V, VVOFF = -15V, TA = +25NC, unless otherwise noted.)
CPV_ TO CKV_ RISING EDGE
PROPAGATION DELAY
(STV = 0V, CLOAD = 5nF, RLOAD = 50I)
MAX17121 toc07
CPV_
5V/div
CKV_
10V/div
100ns/div
CPV_ TO CKV_ FALLING EDGE
PROPAGATION DELAY
(STV = 0V, CLOAD = 5nF, RLOAD = 50I)
MAX17121 toc08
CPV_
5V/div
CKV_
10V/div
100ns/div
CKV_ SLEW RATE ON RISING EDGE
(STV = VDD, CLOAD = 5nF, RLOAD = 50I)
MAX17121 toc09
CPV_
5V/div
CKV_
10V/div
20ns/div
VIN = 3.3V, GON = 25V, GOFF = -15V
CKV_ SLEW RATE ON FALLING EDGE
(STV = VDD, CLOAD = 5nF, RLOAD = 50I)
MAX17121 toc10
CPV_
5V/div
CKV_
10V/div
20ns/div
ENABLE DELAY FUNCTION
MAX17121 toc11
CPV_
2V/div
DLY
2V/div
5V/div
CKV_
20V/div
40ms/div
