19-2900; Rev 0; 12/07
MAX17014 Evaluation Kit
General Description
The MAX17014 evaluation kit (EV kit) is a fully assembled
and tested surface-mount printed-circuit board (PCB)
that provides the voltages and features required for thin-
film transistor (TFT) liquid-crystal display (LCD) TV pan-
els. The EV kit includes a step-down switching regulator,
a step-up switching regulator, a positive two-stage
charge pump for the TFT gate-on supply, a negative sin-
gle-stage charge pump for the TFT gate-off supply, and
two high-current operational amplifiers (op amps).
The EV kit operates from a DC supply voltage of +10.8V
to +13.2V, as configured. The step-down switching reg-
ulator is configured for a +3.3V output providing at least
2A. The step-up switching regulator is configured for a
+16V output providing at least 1.5A. The positive
charge pump is configured for a +35V output providing
at least 50mA. The negative charge pump is configured
for a -6V output providing at least 100mA. High-
frequency operation (1.2MHz) allows the use of tiny sur-
face-mount components to minimize the thickness of
LCD panel designs.
The EV kit features two high-performance operational
amplifiers (op amps) designed to drive the LCD back-
plane (VCOM). Power to the VCOM amplifiers comes
from the step-up switching regulator output.
♦
+10.8V to +13.2V Input Range
♦
Output Voltages
+3.3V at 2A (Step-Down Switching Regulator)
+16V at 1.5A (Step-Up Switching Regulator)
+35V at 50mA (Positive Charge Pump)
-6V at 100mA (Negative Charge Pump)
♦
Adjustable Output Voltages (External Resistors)
♦
1.2MHz Switching Frequency (600kHz Selectable)
♦
Two High-Speed Op Amps
♦
Low-Profile Surface-Mount Components
♦
Fully Assembled and Tested
Features
Evaluates: MAX17014
Ordering Information
PART
MAX17014EVKIT+
TYPE
EV Kit
+Denotes
lead-free and RoHS-compliant.
Component List
DESIGNATION
QTY
DESCRIPTION
10µF ±20%, 16V X5R ceramic
capacitors (1206)
Murata GRM31CR61C106K
TDK C3216X5R1C106M
0.1µF ±10%, 50V X7R ceramic
capacitors (0603)
Murata GRM188R71H104K
TDK C1608X7R1H104K
22µF ±10%, 6.3V X5R ceramic
capacitor (1206)
Taiyo Yuden EMK316BJ226ML
Murata GRM31CR60J226M
Not installed, capacitor (1206)
1µF ±10%, 16V X5R ceramic
capacitors (0603)
Murata GRM188R71C105K
TDK C1608X5R1C105K
220pF ±10%, 50V X7R ceramic
capacitor (0603)
Murata GRM188R71H221K
TDK C1608X7R1H221K
C20
1
DESIGNATION
QTY
DESCRIPTION
0.22µF ±10%, 10V X7R ceramic
capacitor (0603)
Taiyo Yuden LMK107BJ224KA
TDK C1608X7R1A224K
0.15µF ±10%, 16V X7R ceramic
capacitors (0603)
Taiyo Yuden EMK107BJ154KA
TDK C1608X7R1E154K
10µF ±20%, 25V X5R ceramic
capacitors (1210)
Taiyo Yuden TMK325BJ106MM
TDK C3225X5R1E106M
330pF ±10%, 50V X7R ceramic
capacitor (0603)
Murata GRM188R71H331K
TDK C1608X7R1H331K
1µF ±10%, 50V X7R ceramic
capacitor (1206)
Murata GRM31MR71H105KA
TDK C3216X7R1H105K
C1, C2, C3
3
C10
1
C4, C7, C11,
C14, C17, C21,
C22–C25
10
C12, C13
2
C5
1
C16, C18, C19
3
C6
0
C8, C15
2
C26
1
C9
1
________________________________________________________________
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.
MAX17014 Evaluation Kit
Evaluates: MAX17014
Component List (continued)
DESIGNATION
C27, C29, C30,
C31
QTY
0
DESCRIPTION
Not installed, capacitors (0603)
L2
1
100pF ±5%, 50V C0G ceramic
capacitor (0603)
Murata GRM1885C1H101J
TDK C1608C0G1H101J
Not installed, capacitor (1210)
30V, 3A Schottky diodes (M-flat)
Toshiba CMS02 (TE12L,Q)
100V, 200mA dual ultra-fast diodes
(SOT23)
Fairchild MMBD4148SE (Top Mark: D4)
Central Semiconductor CMPD1001S
Lead Free (Top Mark: L21)
100V, 200mA single ultra-fast diode
(SOT23)
Fairchild MMBD4148 (Top Mark: 5H)
Central Semiconductor CMPD1001
Lead Free (Top Mark: L20)
Test points
Keystone 5000
2-pin headers
—
2
3-pin headers
Low-profile 4.7µH, 3.5A inductor
(2mm height)
TOKO FDV0620-4R7M
Würth S06100032
—
5
1
1
DESIGNATION
QTY
DESCRIPTION
Low-profile 2.4µH, 2.6A inductor
(1.8mm height)
TOKO 1124BS-2R4M (2.4µH)
Würth 744052002 (2.5µH)
150kΩ ±1% resistor (0603)
23.7kΩ ±1% resistor (0603)
158kΩ ±1% resistor (0603)
13.3kΩ ±1% resistors (0603)
82.5kΩ ±5% resistor (0603)
2.2kΩ ±1% resistors (0603)
20kΩ ±1% resistors (0603)
0Ω ±5% resistors (0603)
100kΩ ±5% resistors (0603)
1kΩ ±5% resistor (0603)
357kΩ ±1% resistor (0603)
Not Installed, resistor (0603)
Low-cost multiple-output power
supply for LCD TVs (48-pin thin QFN,
7mm x 7mm)
Maxim MAX17014ETM+
Shunts, 0.1in centers
PCB: MAX17014 Evaluation Kit+
C28
R1
R2
R3
R4, R6, R17
R5
R7
R8–R11, R19
R12, R13, R20
R14, R21, R22,
R23
R15
R16
R18
1
1
1
3
1
1
5
3
4
1
1
0
C32
D1, D2
0
2
D3, D4, D5
3
D6
1
EN1, EN2,
MODE, REF, VL
JU1, JU3,
JU4, JU5
JU2, JU6
5
4
U1
1
L1
1
Component Suppliers
SUPPLIER
Central Semiconductor
Fairchild Semiconductor
Murata Mfg. Co., Ltd.
Taiyo Yuden
TDK Corp.
TOKO America, Inc.
Toshiba America Electronic Components, Inc.
Würth Electronik GmbH & Co. KG
PHONE
516-435-1110
408-822-2000
770-436-1300
800-348-2496
847-390-4373
847-297-0070
949-455-2000
201-785-8800
www.centralsemi.com
www.fairchildsemi.com
www.murata.com
www.t-yuden.com
www.component.tdk.com
www.tokoam.com
www.toshiba.com/taec
www.we-online.com
WEBSITE
Note:
Indicate that you are using the MAX17014 when contacting these component suppliers.
2
_______________________________________________________________________________________
MAX17014 Evaluation Kit
Quick Start
Recommended Equipment
Before beginning, the following equipment is needed:
•
+10.8V to +13.2V, 3A DC power supply
•
Digital multimeters (DMMs)
Although the IC specifies a +8V to +16.5V input range,
the EV kit is optimized for +10.8V to +13.2V input supply.
Evaluates: MAX17014
Jumper Selection
Several jumper settings in the following tables illustrate
features of the MAX17014 EV kit.
Procedure
The MAX17014 EV kit is fully assembled and tested.
Follow the steps below to verify board operation.
Caution: Do not turn on the power supply until all
connections are completed.
1) Connect the positive terminal of the DC power sup-
ply to the VIN pad. Connect the negative terminal of
the DC power supply to the PGND pad.
2) Preset the power supply to +12V and disable the
output.
3) Verify that the jumpers follow the default settings in
Table1.
4) Turn on the power supply.
5) Verify that the step-down regulator output (OUT) is
+3.3V.
6) Verify that the step-up regulator output (AVDD) is
+16V.
7) Verify that the gate-on supply (VGON) is +35V.
8) Verify that the gate-off supply (VGOFF) is -6V.
9) Verify that the op-amp outputs (VCOM1, VCOM2)
are +8V.
Switching Frequency Selection (FSEL)
The step-down and step-up regulators on the MAX17014
EV kit switch at the same frequency, but are 180° out-of-
phase with each other. The EV kit features a 2-pin jumper
(JU1) to select the operating frequency. The EV kit is
optimized for 1.2MHz switching frequency; proper oper-
ation at 600kHz may require component changes. Table
2 lists the selectable JU1 jumper options.
Table 2. Jumper JU1 Functions
SHUNT POSITION
Not installed*
Installed
FSEL PIN
CONNECTED TO
VL (through pullup
resistor R21)
GND
EV KIT
FREQUENCY
1.2MHz
600kHz
*Default
position.
High-Voltage Switch Mode (MODE)
The MAX17014 EV kit features an option to select the
operating mode (delay or no delay) for the high-voltage
switches. On the rising edge of the CTL pin, GON con-
nects to SRC. On CTL’s falling edge, GON may con-
nect immediately to DRN (no delay), or GON may con-
nect to DRN after a delay set by capacitor C9. Refer to
the
High-Voltage Switch Control
section in the
MAX17014 IC data sheet for a more detailed descrip-
tion of the two modes of operation. Jumper JU2 selects
the high-voltage switch mode for the MAX17014. Table
3 lists the selectable JU2 jumper options.
Table 1. Default Jumper Settings
JUMPER
JU1
JU2
JU3
JU4
JU5
JU6
SHUNT POSITION
Not installed
2-3
Installed
Installed
Installed
1-2
Table 3. Jumper JU2 Functions
SHUNT POSITION
1-2
2-3*
Not installed
MODE PIN
CONNECTED TO
C9
VL
Unconnected
HIGH-VOLTAGE
SWITCH MODE
Delay set by C9
No delay
Not allowed
Detailed Description
The MAX17014 EV kit evaluates the MAX17014 multiple-
output power-supply IC, which is designed primarily for
TFT LCD panels used in monitors and TVs. The EV kit
contains a step-down switching regulator to generate
the logic supply rail, a step-up switching regulator to
generate the source driver supply, and two charge-
pump regulators to generate the gate driver supplies.
The EV kit also includes two high-performance op amps
designed to drive the LCD back plane (VCOM).
*Default
position.
Step-Down and Negative Charge-Pump
Regulator Enable Input (EN1)
The MAX17014 EV kit features a jumper (JU3) to con-
trol the step-down and negative charge-pump regulator
enable input (EN1). By default, a shunt is installed
across JU3 to provide EN1 logic-high. When EN1 is
3
_______________________________________________________________________________________
MAX17014 Evaluation Kit
Evaluates: MAX17014
Table 4. Jumpers JU3 and JU4 Functions
SHUNT POSITION
JU3
Installed*
Installed
Not installed
*Default
position.
X = Don’t care.
JU4
Installed*
Not installed
X
STEP-DOWN AND NEGATIVE
CHARGE-PUMP REGULATOR
Enabled
Enabled
Disabled
STEP-UP AND POSITIVE
CHARGE-PUMP REGULATOR
Enabled
Disabled
Disabled
Table 5. Jumper JU5 Functions
SHUNT POSITION
Installed*
Not installed
Not installed (external logic
controller connected to CTL pad)
CTL PIN CONNECTED TO
VL
GND (through resistor R14)
External logic controller
MAX17014 HIGH-VOLTAGE SWITCH CONFIGURATION
GON pin connected to SRC pin
GON pin connected to DRN pin
GON pin connected to SRC pin (CTL driven high)
GON pin connected to DRN pin (CTL driven low)
*Default
position.
logic-high, both the OUT and the VGOFF outputs are
enabled. Removing the shunt disables the OUT and the
VGOFF outputs. Refer to the
Power-Up Sequence
sec-
tion in the MAX17014 IC data sheet for a more detailed
description of the OUT and VGOFF power-up sequence.
Table 4 lists the selectable JU3 jumper options.
jumper JU6. When CTL is low, GON may be connected
to DRN, allowing VGON to discharge through resistor
R15. JU6 selects the discharge path by connecting
R15 to AVDD (through diode D6) or to PGND. Table 6
lists the selectable JU6 jumper options.
Step-Up and Positive Charge-Pump
Regulator Enable Input (EN2)
The MAX17014 EV kit features a jumper (JU4) to control
the step-up and positive charge-pump regulator enable
input (EN2). By default, a shunt is installed across JU4
to provide EN2 logic-high. When EN2 and EN1 are
logic-high, both the AVDD and the VGON outputs are
enabled. EN2 is inactive when EN1 is low. Refer to the
Power-Up Sequence
section in the MAX17014 IC data
sheet for a more detailed description of the AVDD and
VGON power-up sequence. Table 4 lists the selectable
JU4 jumper options.
Table 6. Jumper JU6 Functions
SHUNT
POSITION
1-2*
2-3
DRN PIN
CONNECTED TO
AVDD (through resistor R15
and diode D6)
PGND (through resistor R15)
VGON
DISCHARGED
TOWARD
AVDD
PGND
*Default
position.
Output Voltage Selection
Step-Down Switching-Regulator
Output Voltage (OUT)
The MAX17014 EV kit’s step-down switching regulator
supports both fixed and adjustable output voltages. By
default, the EV kit’s step-down regulator’s output (OUT)
is set to the +3.3V fixed mode by connecting FB2 to
GND through resistor R19. For adjustable mode
(+1.25V to +5V), select R18 and R19 to set the desired
step-down regulator output voltage. Refer to the
Detailed Description, Step-Down Regulator
section in
the MAX17014 IC data sheet for instructions on select-
ing resistors R18 and R19.
High-Voltage Switch Control Input (CTL)
Jumper JU5 configures the setting to control the high-
voltage switch control pin (CTL) of the MAX17014 IC.
Switches between the SRC and GON pins and the
GON and DRN pins can also be controlled by an exter-
nal logic controller connected to the CTL pad. See
Table 5 for switch states and refer to the
High-Voltage
Switch Control
section in the MAX17014 IC data sheet
for further information about the high-voltage switches
connected to the GON pin.
VGON Discharge Path
The MAX17014 EV kit features a method to configure
the VGON discharge path using resistor R15 and
4
_______________________________________________________________________________________
MAX17014 Evaluation Kit
Step-Up Switching-Regulator
Output Voltage (AVDD)
The MAX17014 EV kit’s step-up switching-regulator out-
put (AVDD) is set to +16V by feedback resistors R3 and
R4. To generate output voltages other than +16V (VIN
to +20V), select different external voltage-divider resis-
tors. Refer to the
Design Procedure, Step-Up Regulator
section in the MAX17014 IC data sheet for instructions
on selecting the feedback resistors.
Negative Charge-Pump Output (VGOFF)
The negative charge-pump output (VGOFF) is set to
-6V by voltage-divider resistors R1 and R2. To set
VGOFF to other voltages (0V to -AVDD), select different
divider resistors. For VGOFF lower than -16V, select
C15 with a higher voltage rating. Refer to the
Design
Procedure, Charge-Pump Regulators, Output Voltage
Selection
section in the MAX17014 IC data sheet for
instructions on selecting resistors R1 and R2.
Evaluates: MAX17014
Positive Charge-Pump Output (VGON)
The positive charge-pump output (VGON) is set to
+35V by voltage-divider resistors R16 and R17. To set
VGON to other voltages (up to approximately 3 x
AVDD, 44V max), select different divider resistors.
Refer to the
Design Procedure, Charge-Pump
Regulators, Output Voltage Selection
section in the
MAX17014 IC data sheet for instructions on selecting
resistors R16 and R17.
Op-Amp Output Voltages (VCOM1, VCOM2)
The MAX17014 EV kit’s op-amp outputs (VCOM1,
VCOM2) are designed to drive the LCD backplane
(VCOM). Both op amps are configured as unity gain
buffers by resistors R12 and R13. Using external volt-
age-divider resistors, each op amp’s output is set for
one half of the AVDD output voltage. To generate out-
put voltages other than +8V, select different external
voltage-divider resistors (R8–R11).
_______________________________________________________________________________________
5
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