19-4272; Rev 0; 9/08
MAX8630X Evaluation Kit
The MAX8630X evaluation kit (EV kit) is a fully assembled and tested circuit for evaluating the MAX8630X
charge-pump white LED driver. The MAX8630X EV kit
operates from a 2.7V to 5.5V supply. Two pulse generator circuits are included on the board for evaluating the
serial-pulse dimming feature. The EV kit can also be
used to evaluate the MAX8630W with PWM dimming.
Ordering Information
PART
TYPE
MAX8630XEVKIT+
EV Kit
Features
o 93% Max/85% Avg Efficiency (PLED/PBATT) Over
Li+ Battery Discharge
o Adaptive 1x/1.5x Mode Switchover
o 32-Step Serial-Pulse Dimming
o Independent On/Off/Dimming for Main and Sub
Displays
o
o
o
o
o
25mA per LED Output Current
Low 0.1µA Shutdown Current
2.7V to 5.5V Supply Voltage Range
On-Board Pulse Generators and White LEDs
14-Pin, 3mm x 3mm TDFN IC Package
o Lead-Free and RoHS Compliant
+Denotes lead-free and RoHS compliant.
o Fully Assembled and Tested
Component List
DESIGNATION
QTY
C1–C4
4
C5, C8
2
DESCRIPTION
1µF ±20%, 6.3V X5R ceramic
capacitors (0402)
Panasonic ECJ0EB0J105M
TDK C1005X5R0J105M
Murata GRM1555R60J105M
DESIGNATION
QTY
D6, D7
2
DESCRIPTION
Diodes (SOD-323)
Central Semi CMDD4448
JU1, JU2
2
3-pin headers
JU3, JU4, JU5
0
PCB shorts
R1, R2
2
10kΩ ±5% resistors (0402)
S1, S2
2
Momentary pushbutton switches
Panasonic EVQ-PHP03T
U1
1
Charge pump (14 TDFN)
Maxim MAX8630XETD25
(Top Mark: ADX)
U2, U3
2
CMOS switch debouncers (4 SOT143)
Maxim MAX6816EUS-T
2.2µF ±10%, 6.3V X5R ceramic
capacitors (0603)
Panasonic ECJ1VB0J225K
TDK C1608X5R0J225K
Murata GRM188R60J225K
C6, C7
2
1000pF ±10%, X7R ceramic
capacitors (0402)
TDK C1005X7R1H102K
C9
0
Not installed, ceramic capacitor (0402)
—
2
Shunts, 2-position
5
White LEDs
Nichia NSCW215T
—
1
PCB: MAX8630X Evaluation Kit+
D1–D5
Component Suppliers
SUPPLIER
PHONE
WEBSITE
Central Semiconductor Corp.
631-435-1110
www.centralsemi.com
Murata Electronics North America, Inc.
770-436-1300
www.murata-northamerica.com
Nichia Corp.
248-352-6575
www.nichia.com
Panasonic Corp.
800-344-2112
www.panasonic.com
TDK Corp.
847-803-6100
www.component.tdk.com
Note: Indicate that you are using the MAX8630X or MAX8630W when contacting these component suppliers.
________________________________________________________________ Maxim Integrated Products
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.
1
Evaluates: MAX8630X/MAX8630W
General Description
Evaluates: MAX8630X/MAX8630W
MAX8630X Evaluation Kit
Quick Start
Detailed Description of Hardware
Recommended Equipment
Serial-Pulse Dimming
Before beginning, the follow equipment is needed:
• 2.7V to 5.5V power supply capable of delivering
500mA
On-board pulse generators are provided to evaluate
the serial-pulse dimming feature of the MAX8630X. To
enable or disable the main or sub group of LEDs and
the corresponding pulse generator, use JU1 and JU2
(see Table 1). When first enabled, the LEDs are at full
brightness. To dim the main LEDs, press S1 repeatedly; for the sub LEDs, press S2 repeatedly. Dimming is
done in 32 linear steps. On the 32nd button press, the
LEDs return to full brightness.
To use external pulse generators, cut the traces shorting JU4 and JU5 to disconnect the on-board pulse
generators. Connect the external pulse generator to the
pads labeled ENM (main) and ENS/PWM (sub).
Procedure
Follow the steps below to verify board operation:
1) Place shunts across pins 1-2 of JU1 and JU2 to
enable the main and sub LEDs.
2) Set the power-supply voltage between 2.7V to 5.5V.
Turn the power supply off. Do not turn on the power
supply until all connections are completed.
3) Connect the positive power-supply lead to the EV
kit pad labeled IN. Connect the power-supply
ground to the EV kit pad labeled GND.
4) Turn on the power supply. When turned on, the
LEDs are at full brightness.
5) To dim the main LEDs in 1/32nd steps, press S1
repeatedly. The main LEDs return to full brightness
after 32 button presses.
6) To dim the sub LEDs in 1/32nd steps, press S2
repeatedly. The sub LEDs return to full brightness
after 32 button presses.
Table 1. Jumper Settings
JUMPER
SHUNT
POSITION
JU5
2
The MAX8630XETD25 (25mA serial-pulse dimming version) comes installed on the MAX8630X EV kit. To evaluate other versions of the MAX8630X, simply replace
the IC with a part having the desired factory-programmed, full-scale output current.
To evaluate the MAX8630W_ with direct PWM dimming
control, replace U1 with the MAX8630W_, cut the
traces shorting JU4 and JU5, and install capacitor C9
(typically 0.1µF). Apply the PWM dimming signal to the
EV kit pad labeled ENS/PWM.
FUNCTION
ENM is pulled up to IN with a 10kΩ resistor, enabling the main LED group. The pulse
generator for the main LED group is powered.
2-3
ENM is pulled down to GND, disabling the main LED group. The pulse generator for the main
LED group is not powered.
1-2
ENS is pulled up to IN with a 10kΩ resistor, enabling the sub LED group. The pulse generator
for the sub LED group is powered.
2-3
ENS is pulled down to GND, disabling the sub LED group. The pulse generator for the sub
LED group is not powered.
JU2
JU4
Evaluating Other Versions of
the MAX8630
1-2
JU1
JU3
Using Fewer than 5 LEDs
To disable any of the LEDs, connect the square pad next
to that particular LED to the square pad labeled OUT.
Short
Connects the on-board LEDs to the MAX8630 output.
Open
Disconnects the on-board LEDs from the MAX8630 output.
Short
Connects ENM to the on-board main pulse generator.
Open
Disconnects ENM from the on-board main pulse generator.
Short
Connects ENS to the on-board sub pulse generator.
Open
Disconnects ENS from the on-board sub pulse generator.
_______________________________________________________________________________________
MAX8630X Evaluation Kit
IN
1
JU1
C5
2.2μF
4
VCC
2
U2
IN
MAX6816
OUT
IN
R1
10kΩ
GND
JU2
C8
2.2μF
4
VCC
S2
U3
IN
MAX6816
GND
1
OUT
1
ENM
IN
2
C1N
OUT
IN
9
JU3
MAX8630X
LED1
14
D1
13
D2
12
D3
11
D4
10
D5
ENM
LED2
3
R2
10kΩ
ENS/PWM
D7
8
LED3
ENS
JU5
3
OUT
C4
1μF
GND
C9
OPEN
2
7
U1
JU4
C6
1000pF
6
C1P
C3
1μF
D6
1
2
3
3
3
GND
1
S1
2
LED4
C7
1000pF
LED5
C2P
5
C2N
4
C2
1μF
Figure 1. MAX8630X EV Kit Schematic
_______________________________________________________________________________________
3
Evaluates: MAX8630X/MAX8630W
C1
1μF
IN
Evaluates: MAX8630X/MAX8630W
MAX8630X Evaluation Kit
Figure 2. MAX8630X EV Kit Component Placement Guide—
Component Side
Figure 3. MAX8630X EV Kit PCB Layout—Component Side
Figure 4. MAX8630X EV Kit PCB Layout—Solder Side
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.
4 _____________________Maxim Integrated Products, 120 San Gabriel Drive, Sunnyvale, CA 94086 408-737-7600
© 2008 Maxim Integrated Products
is a registered trademark of Maxim Integrated Products, Inc.
很抱歉,暂时无法提供与“MAX8630XEVKIT+”相匹配的价格&库存,您可以联系我们找货
免费人工找货