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.
Features
♦+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
Evaluates: MAX17014
MAX17014 Evaluation Kit
________________________________________________________________
Maxim Integrated Products
1
19-2900; Rev 0; 12/07
Component List
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.
Ordering Information
PART TYPE
M AX 17014E V KIT+ EV Kit
DESIGNATION QTY DESCRIPTION
C1, C2, C3 3
10µF ±20%, 16V X5R ceramic
capacitors (1206)
Murata GRM31CR61C106K
TDK C3216X5R1C106M
C4, C7, C11,
C14, C17, C21,
C22–C25
10
0.1µF ±10%, 50V X7R ceramic
capacitors (0603)
Murata GRM188R71H104K
TDK C1608X7R1H104K
C5 1
22µF ±10%, 6.3V X5R ceramic
capacitor (1206)
Taiyo Yuden EMK316BJ226ML
Murata GRM31CR60J226M
C6 0 Not installed, capacitor (1206)
C8, C15 2
1µF ±10%, 16V X5R ceramic
capacitors (0603)
Murata GRM188R71C105K
TDK C1608X5R1C105K
C9 1
220pF ±10%, 50V X7R ceramic
capacitor (0603)
Murata GRM188R71H221K
TDK C1608X7R1H221K
DESIGNATION QTY DESCRIPTION
C10 1
0.22µF ±10%, 10V X7R ceramic
capacitor (0603)
Taiyo Yuden LMK107BJ224KA
TDK C1608X7R1A224K
C12, C13 2
0.15µF ±10%, 16V X7R ceramic
capacitors (0603)
Taiyo Yuden EMK107BJ154KA
TDK C1608X7R1E154K
C16, C18, C19 3
10µF ±20%, 25V X5R ceramic
capacitors (1210)
Taiyo Yuden TMK325BJ106MM
TDK C3225X5R1E106M
C20 1
330pF ±10%, 50V X7R ceramic
capacitor (0603)
Murata GRM188R71H331K
TDK C1608X7R1H331K
C26 1
1µF ±10%, 50V X7R ceramic
capacitor (1206)
Murata GRM31MR71H105KA
TDK C3216X7R1H105K
+
Denotes lead-free and RoHS-compliant.
Evaluates: MAX17014
MAX17014 Evaluation Kit
2 _______________________________________________________________________________________
Component List (continued)
DESIGNATION QTY DESCRIPTION
C27, C29, C30,
C31 0 Not installed, capacitors (0603)
C28 1
100pF ±5%, 50V C0G ceramic
capacitor (0603)
Murata GRM1885C1H101J
TDK C1608C0G1H101J
C32 0 Not installed, capacitor (1210)
D1, D2 2 30V, 3A Schottky diodes (M-flat)
Toshiba CMS02 (TE12L,Q)
D3, D4, D5 3
100V , 200m A d ual ul tr a- fast d i od es
( S O T23)
Fai r chi l d M M BD 4148S E ( Top M ar k: D 4)
C entr al S em i cond uctor C M P D 1001S
Lead Fr ee ( Top M ar k: L21)
D6 1
100V, 200mA single ultra-fast diode
(SOT23)
Fairchild MMBD4148 (Top Mark: 5H)
Central Semiconductor CMPD1001
Lead Free (Top Mark: L20)
EN1, EN2,
MODE, REF, VL 5Test points
Keystone 5000
JU1, JU3,
JU4, JU5 4 2-pin headers
JU2, JU6 2 3-pin headers
L1 1
Low-profile 4.7µH, 3.5A inductor
(2mm height)
TOKO FDV0620-4R7M
Würth S06100032
SUPPLIER PHONE WEBSITE
Central Semiconductor 516-435-1110 www.centralsemi.com
Fairchild Semiconductor 408-822-2000 www.fairchildsemi.com
Murata Mfg. Co., Ltd. 770-436-1300 www.murata.com
Taiyo Yuden 800-348-2496 www.t-yuden.com
TDK Corp. 847-390-4373 www.component.tdk.com
TOKO America, Inc. 847-297-0070 www.tokoam.com
Toshiba America Electronic Components, Inc. 949-455-2000 www.toshiba.com/taec
Würth Electronik GmbH & Co. KG 201-785-8800 www.we-online.com
DESIGNATION QTY DESCRIPTION
L2 1
Low-profile 2.4µH, 2.6A inductor
(1.8mm height)
TOKO 1124BS-2R4M (2.4µH)
Würth 744052002 (2.5µH)
R1 1 150kΩ ±1% resistor (0603)
R2 1 23.7kΩ ±1% resistor (0603)
R3 1 158kΩ ±1% resistor (0603)
R4, R6, R17 3 13.3kΩ ±1% resistors (0603)
R5 1 82.5kΩ ±5% resistor (0603)
R7 1 2.2kΩ ±1% resistors (0603)
R8–R11, R19 5 20kΩ ±1% resistors (0603)
R12, R13, R20 3 0Ω ±5% resistors (0603)
R14, R21, R22,
R23 4 100kΩ ±5% resistors (0603)
R15 1 1kΩ ±5% resistor (0603)
R16 1 357kΩ ±1% resistor (0603)
R18 0 Not Installed, resistor (0603)
U1 1
Low-cost multiple-output power
supply for LCD TVs (48-pin thin QFN,
7mm x 7mm)
Maxim MAX17014ETM+
— 5 Shunts, 0.1in centers
— 1 PCB: MAX17014 Evaluation Kit+
Component Suppliers
Note: Indicate that you are using the MAX17014 when contacting these component suppliers.
Quick Start
Recommended Equipment
Before beginning, the following equipment is needed:
•+10.8V to +13.2V, 3A DC power supply
•Digital multimeters (DMMs)
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.
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).
Although the IC specifies a +8V to +16.5V input range,
the EV kit is optimized for +10.8V to +13.2V input supply.
Jumper Selection
Several jumper settings in the following tables illustrate
features of the MAX17014 EV kit.
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.
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.
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
Evaluates: MAX17014
MAX17014 Evaluation Kit
_______________________________________________________________________________________ 3
JUMPER SHUNT POSITION
JU1 Not installed
JU2 2-3
JU3 Installed
JU4 Installed
JU5 Installed
JU6 1-2
Table 1. Default Jumper Settings
SHUNT POSITION FSEL PIN
CONNECTED TO
EV KIT
FREQUENCY
Not installed* VL (through pullup
resistor R21) 1.2MHz
Installed GND 600kHz
Table 2. Jumper JU1 Functions
*
Default position.
SHUNT POSITION MODE PIN
CONNECTED TO
HIGH-VOLTAGE
SWITCH MODE
1-2 C9 Delay set by C9
2-3* VL No delay
Not installed Unconnected Not allowed
Table 3. Jumper JU2 Functions
*
Default position.
Evaluates: MAX17014
MAX17014 Evaluation Kit
4 _______________________________________________________________________________________
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.
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.
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
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.
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.
SHUNT POSITION
JU3 JU4
STEP-DOWN AND NEGATIVE
CHARGE-PUMP REGULATOR
STEP-UP AND POSITIVE
CHARGE-PUMP REGULATOR
Installed* Installed* Enabled Enabled
Installed Not installed Enabled Disabled
Not installed X Disabled Disabled
Table 4. Jumpers JU3 and JU4 Functions
*
Default position.
X = Don’t care.
SHUNT POSITION CTL PIN CONNECTED TO MAX17014 HIGH-VOLTAGE SWITCH CONFIGURATION
Installed* VL GON pin connected to SRC pin
Not installed GND (through resistor R14) GON pin connected to DRN pin
GON pin connected to SRC pin (CTL driven high)
Not installed (external logic
controller connected to CTL pad) External logic controller GON pin connected to DRN pin (CTL driven low)
Table 5. Jumper JU5 Functions
*
Default position.
SHUNT
POSITION
DRN PIN
CONNECTED TO
VGON
DISCHARGED
TOWARD
1-2* AVDD (through resistor R15
and diode D6) AVDD
2-3 PGND (through resistor R15) PGND
Table 6. Jumper JU6 Functions
*
Default position.
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.
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.
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.
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).
Evaluates: MAX17014
MAX17014 Evaluation Kit
_______________________________________________________________________________________ 5
Evaluates: MAX17014
MAX17014 Evaluation Kit
6 _______________________________________________________________________________________
L1
4.7μHD1
C2
10μF
16V
C1
10μF
16V
22
VIN
C3
10μF
16V
25
26
23
24
D2
20
21
27
30
C7
0.1μF
VL
C8
1μF
R21
100kΩ
28
4
REF
17
C10
0.22μF
15
34
REF
VL
123
JU2
MODE
C9
220pF
MODE
JU1
18
29
33
C12
0.15μF
C11
0.1μF
VL
JU3
EN1
VL
R20
0Ω
VIN
R19
20kΩ
1%
C28
100pF
R18
OPEN
L2
2.4μH
C4
0.1μF
VIN
PGND
OUT
C5
22μF
6.3V
C6
OPEN
VL
JU4
EN2
32
6
C13
0.15μF
R23
100kΩ
R22
100kΩ
D3
1
3
L
R
2
C14
0.1μF
11
14
19
R1
150kΩ
1%
R2
23.7kΩ
1%
REF
PGND
C31
OPEN
C15
1μF
16V
PGND
VGOFF
C27
OPEN
16 10
C30
OPEN
R16
357kΩ
1%
R17
13.3kΩ
1%
SRC
C24
0.1μF
D5
1
2
L
RC25
0.1μF
50V
AVDD
C26
1μF
50V
SRC
2
1
R
L
D4
3
C23
0.1μF
C22
0.1μF
SW1
SW1
R14
100kΩ
CTL
JU5
VGON
SRC
CTL
R13
0Ω
VL
VCOM2
VCOM1 R7
2.2kΩ
1%
R6
13.3kΩ
1%
R9
20kΩ
1%
AVDD
R8
20kΩ
1%
R11
20kΩ
1%
AVDD
R10
20kΩ
1%
C29
OPEN
AVDD
C20
330pF
R5
82.5kΩ
AVDD
C21
0.1μF
R3
158kΩ
1%
C19
10μF
25V
C18
10μF
25V
C32
OPEN R4
13.3kΩ
1%
PGND
AVDD
AVDD
SW1
C16
10μF
25V
C17
0.1μF
37
38
35
36
39
40
42
41
31
43
47
1
12
13
7
8
9
5
46
44
2
48
R12
0Ω
3
45
FBP
EP
FBN
CPGND
DRVN
N.C.
DLP
EN2
EN1
DEL2
DEL1
GND
GND
REF
MODE
FSEL
VL
VIN
BST
IN2
IN2
LX2
LX2
OUT
FB2
R15
1kΩ
3
2
1
JU6
D6
1
3
AVDD
DRVP
SUP
DRN
GON
SRC
CTL
OUT2
NEG2
OUT1
NEG1
THR
POS2
POS1
OGND
OVIN
COMP
FB1
SWO
SUI
SWI
GND1
GND1
LX1
LX1
VIN
+16, 1.5A
MAX17014
U1
+10.8V TO +13.2V
+3.3V, 2A
-6V, 100mA
+35V, 50mA
3
PGND
Figure 1. MAX17014 EV Kit Schematic
Evaluates: MAX17014
MAX17014 Evaluation Kit
_______________________________________________________________________________________ 7
Figure 2. MAX17014 EV Kit Component Placement Guide—Component Side
Evaluates: MAX17014
MAX17014 Evaluation Kit
8 _______________________________________________________________________________________
Figure 3. MAX17014 EV Kit PCB Layout—Component Side
Evaluates: MAX17014
MAX17014 Evaluation Kit
_______________________________________________________________________________________ 9
Figure 4. MAX17014 EV Kit PCB Layout—Internal Layer 2 (PGND Plane)
Evaluates: MAX17014
MAX17014 Evaluation Kit
10 ______________________________________________________________________________________
Figure 5. MAX17014 EV Kit PCB Layout—Internal Layer 3 (Signal/GND Plane)
Maxim cannot assume responsibility for use of any circuitry other than circuitry entirely embodied in a Maxim product. No circuit patent licenses are
implied. Maxim reserves the right to change the circuitry and specifications without notice at any time.
Maxim Integrated Products, 120 San Gabriel Drive, Sunnyvale, CA 94086 408-737-7600 ____________________
11
© 2007 Maxim Integrated Products is a registered trademark of Maxim Integrated Products, Inc.
Evaluates: MAX17014
MAX17014 Evaluation Kit
Figure 6. MAX17014 EV Kit PCB Layout—Solder Side
