Datasheet
Multi-Output Power Supplies with VCOM Amplifier
and High-Voltage Gamma Reference for LCD TVs
MAX17126/MAX17126A
2 ______________________________________________________________________________________
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.
INVL, IN2, VOP, EN, FSEL to GND .......................-0.3V to +24V
PGND, OGND, CPGND to GND ..........................-0.3V to +0.3V
DLY1, GVOFF, THR, VL to GND ..........................-0.3V to +7.5V
REF, FBP, FBN, FB1, FB2, COMP, SS, CLIM,
PGOOD, VDET, VREF_FB, OUT to GND ........-0.3V, (V
L
+ 0.3)
GD, GD_I to GND ..................................................-0.3V to +24V
LX1 to PGND .........................................................-0.3V to +24V
OPP, OPN, OPO to OGND ......................... -0.3V to VOP + 0.3V
DRVP to CPGND ...................................... -0.3V to SUPP + 0.3V
DRVN to CPGND ...................................... -0.3V to SUPN + 0.3V
LX2 to PGND ................................................-0.7 to (IN2 + 0.3V)
SUPN to GND .............................................-0.3V to (IN2 + 0.3V)
SUPP to GND .......................................... -0.3V to (GD_I + 0.3V)
BST to VL ...............................................................-0.3V to +30V
VGH to GND ..........................................................-0.3V to +40V
VGHM, DRN to GND ..................................... -0.3V, VGH
+ 0.3V
VGHM to DRN .......................................................-0.3V to +40V
VREF_I to GND ......................................................-0.3V to +24V
VREF_O to GND .......................................-0.3V, (V
REF_I
+ 0.3)V
REF Short Circuit to GND ..........................................Continuous
RMS LX1 Current (total for both pins) .................................3.2 A
RMS PGND CURRENT (total for both pins) ........................3.2 A
RMS IN2 Current (total for both pins) .................................3.2 A
RMS LX2 Current (total for both pins) .................................3.2 A
RMS DRVN, DRVP Current ..................................................0.8A
RMS VL Current ..................................................................50mA
Continuous Power Dissipation (T
A =
+70NC)
48-Pin TQFN
(derated 38.5mW/NC above +70NC) .......................3076.9mW
Junction Temperature .....................................................+160NC
Storage Temperature Range ............................ -65NC to +165NC
Lead Temperature (soldering, 10s) ................................+300NC
Soldering Temperature (reflow) ......................................+260NC
ELECTRICAL CHARACTERISTICS
(Circuit of Figure 1, V
INVL
= V
IN2
=
12V, V
VOP
=
V
VREF_I
=
15V, T
A
= 0°C to +85°C. Typical values are at T
A
= +25NC, unless oth-
erwise noted.)
ABSOLUTE MAXIMUM RATINGS
PARAMETER CONDITIONS MIN TYP MAX UNITS
GENERAL
INVL, IN2 Input-Voltage Range 8 16.5 V
INVL + IN2 Quiescent Current
Only LX2 switching (V
FB1
= V
FBP
= 1.5V, V
FBN
= 0V)
EN = VL, FSEL = high
8.5 20 mA
INVL + IN2 Standby Current
LX2 not switching (V
FB1
= V
FB2
= V
FBP
= 1.5V,
V
FBN
= 0V), EN = VL, FSEL = high
24 5 mA
SMPS Operating Frequency
FSEL = INVL or high impedance 630 750 870
kHz
FSEL = GND 420 500 580
INVL Undervoltage-Lockout
Threshold
INVL rising, 150mV typical hysteresis 6.0 7.0 8.0 V
VL REGULATOR
VL Output Voltage
I
VL
= 25mA, V
FB1
= V
FB2
= V
FBP
= 1.1V, V
FBN
= 0.4V
(all regulators switching)
4.85 5 5.15 V
VL Undervoltage-Lockout
Threshold
VL rising, 50mV typical hysteresis 3.5 3.9 4.3 V
REFERENCE
REF Output Voltage No external load 1.2375 1.250 1.2625 V
REF Load Regulation
0V < I
LOAD
< 50FA
5 mV
REF Sink Current In regulation 10
FA
REF Undervoltage-Lockout
Threshold
Rising edge, 250mV typical hysteresis 1.0 1.2 V