MAX17014EVKIT+ Maxim Integrated Products, MAX17014EVKIT+ Datasheet - Page 23

• Manufacturer Part Number: MAX17014EVKIT+
• Description: KIT EVAL FOR MAX17014
• Manufacturer: Maxim Integrated Products

Specifications of MAX17014EVKIT+

• Main Purpose: Special Purpose DC/DC, LCD Supply
• Outputs And Type: 4, Non-Isolated
• Power - Output: 32.9W
• Voltage - Output: 3.3V, 16V, -6V, 35V
• Current - Output: 2A, 1.5A, 100mA, 50mA
• Voltage - Input: 10.8 ~ 13.2V
• Regulator Topology: Boost, Buck
• Frequency - Switching: 1.2MHz
• Board Type: Fully Populated
• Utilized Ic / Part: MAX17014
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

Select the first mode by connecting MODE to VL. When
CTL is logic-high, Q1 turns on and Q2 turns off, con-
necting GON to SRC. When CTL is logic-low, Q1 turns
off and Q2 turns on, connecting GON to DRN. GON
can then be discharged through a resistor connected
between DRN and GND or AV
stops discharging GON when V
the voltage on THR.
When V
block works in the second mode. The rising edge of
V
SRC. An internal n-channel MOSFET, Q3, between
MODE and GND is also turned on to discharge an
external capacitor between MODE and GND. The
falling edge of V
current source starts charging the MODE capacitor.
Once V
turns off Q1 and turns on Q2, connecting GON to DRN.
GON can then be discharged through a resisor con-
nected between DRN and GND or AV
and stops discharging GON when V
times the voltage on THR.
The switch control block is disabled and DLP is held
low when EN1 or EN2 is low or the IC is in a fault state.
Figure 6. Op Amp Input Clamp Structure
CTL
turns on Q1 and turns off Q2, connecting GON to
MODE
MODE
OVIN
POS1
NEG1
OUT1
is less than 0.8 x V
exceeds V
CTL
______________________________________________________________________________________
turns off Q3, and an internal 50µA
VL/4
, the switch control block
GON
DD
VL
. Q2 turns off and
, the switch control
reaches 10 times
GON
DD
. Q2 turns off
reaches 10
OP AMP INPUT CLAMP STRUCTURE
Power Supply for LCD TVs
Low-Cost Multiple-Output
MAX17014
The MAX17014 has two operational amplifiers. The
operational amplifiers are typically used to drive the
LCD backplane (VCOM) or the gamma-correction
divider string. They feature ±150mA output short-circuit
current, 100V/µs slew rate, and 20MHz, -3dB band-
width. While the op amp is a rail-to-rail input and output
design, its accuracy is significantly degraded for input
voltages within 2V of its supply rails (OVIN, OGND).
The operational amplifiers limit short-circuit current to
approximately ±150mA (-250mA) if the output is direct-
ly shorted to OVIN (OGND). If the short-circuit condition
persists, the junction temperature of the IC rises until it
reaches the thermal-shutdown threshold (+160°C typ).
Once the junction temperature reaches the thermal-
shutdown threshold, an internal thermal sensor immedi-
ately sets the thermal-fault latch, shutting off all the IC’s
outputs. The device remains inactive until the input volt-
age is cycled. The operational amplifiers have 4V input
clamp structures in series with a 500Ω resistance
(Figure 6).
Short-Circuit Current Limit and Input Clamp
Operational Amplifiers
OGND
NEG2
OUT2
POS2
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