MAX16807EVKIT+ Maxim Integrated Products, MAX16807EVKIT+ Datasheet

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MAX16807EVKIT+

Manufacturer Part Number
MAX16807EVKIT+
Description
EVAL KIT FOR MAX16807
Manufacturer
Maxim Integrated Products
Datasheets

Specifications of MAX16807EVKIT+

Current - Output / Channel
50mA
Outputs And Type
8, Non-Isolated
Voltage - Output
32V
Features
Dimmable
Voltage - Input
9 ~ 16V
Utilized Ic / Part
MAX16807
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
The MAX16807 evaluation kit (EV kit) is an 8-channel,
constant-current LED driver, capable of driving 50mA
through each channel and adapting the channel-supply
voltage. Each channel can be used to drive a string of
LEDs with a total forward voltage of up to 32V. The EV
kit features a MAX16807 IC that integrates eight con-
stant-current sinking outputs and a high-performance,
current-mode pulse-width modulator (PWM) controller
for implementing a DC-DC power converter that gener-
ates the supply voltage to drive LED strings connected
to each channel by the user. The sink current for the
eight channels is configurable using a single resistor.
The MAX16807 EV kit operates with supply voltages up
to 16V. The EV kit circuit also features PWM dimming
and shutdown control input PC pads. The MAX16807
EV kit is a fully assembled and tested board.
19-0818; Rev 0; 5/07
For pricing, delivery, and ordering information, please contact Maxim/Dallas Direct! at
1-888-629-4642, or visit Maxim’s website at www.maxim-ic.com.
DESIGNATION
C3, C4, C12,
C13, C15
C1, C2
C5
C6
C7
C8
QTY
________________________________________________________________ Maxim Integrated Products
2
5
1
1
1
1
22µF ±20%, 50V electrolytic
capacitors (D-case)
Panasonic EEEFK1H220P
0.1µF ±10%, 50V X7R ceramic
capacitors (0603)
Murata GRM188R71H104K
TDK C1608X7R1H104K
560pF ±5%, 50V C0G ceramic
capacitor (0603)
Murata GRM1885C1H561J
TDK C1608C0G1H561J
150pF ±5%, 50V C0G ceramic
capacitor (0603)
Murata GRM1885C1H151J
TDK C1608C0G1H151J
10pF ±5%, 50V C0G ceramic
capacitor (0603)
Murata GRM1885C1H100J
TDK C1608C0G1H100J
100pF ±10%, 50V C0G ceramic
capacitor (0603)
Murata GRM1885C1H101K
TDK C1608C0G1H101K
General Description
DESCRIPTION
MAX16807 Evaluation Kit
♦ Up to 16V Supply Voltage Range
♦ 50mA Output Current per Channel
♦ Single Resistor Current Adjust for Eight Channels
♦ Up to 32V LED Forward String Voltage
♦ Boost Converter to Generate LED Voltage
♦ Adaptive LED Voltage Control Increases
♦ PWM Dimming and Shutdown Control Inputs
♦ Proven PCB Layout
♦ Fully Assembled and Tested
+ Denotes a lead-free and RoHS-compliant EV kit.
* This limited temperature range applies to the EV kit PCB only.
The MAX16807 IC temperature range is -40°C to +125°C.
** EP = Exposed paddle.
MAX16807EVKIT+
DESIGNATION
Efficiency
C10, C11
C17–C24
C14
C16
C25
C9
PART
QTY
1
2
1
1
8
0
TEMP RANGE
Ordering Information
0°C to +70°C*
1µF ±10%, 50V X7R ceramic
capacitor (1206)
Murata GRM31MR71H105K
TDK C3216X7R1H105K
22µF ±20%, 35V electrolytic
capacitors (C-case)
Panasonic EEEFK1V220R
1µF ±10%, 16V X5R ceramic
capacitor (0603)
Murata GRM188R61C105K
TDK C1608X5R1C105K
0.01µF ±10%, 50V X7R ceramic
capacitor (0603)
Murata GRM188R71H103K
TDK C1608X7R1H103K
1000pF ±10%, 50V X7R ceramic
capacitors (0603)
Murata GRM188R71H102K
TDK C1608X7R1H102K
Not installed, ceramic capacitor
(0603)
Component List
DESCRIPTION
IC PACKAGE
28 TSSOP-EP**
Features
1

Related parts for MAX16807EVKIT+

MAX16807EVKIT+ Summary of contents

Page 1

... Proven PCB Layout ♦ Fully Assembled and Tested Ordering Information PART TEMP RANGE MAX16807EVKIT+ 0°C to +70°C* + Denotes a lead-free and RoHS-compliant EV kit. * This limited temperature range applies to the EV kit PCB only. The MAX16807 IC temperature range is -40°C to +125° Exposed paddle. ...

Page 2

MAX16807 Evaluation Kit DESIGNATION QTY DESCRIPTION 40V, 1A Schottky diode (SMA Central Semiconductor CMSH1-40ML LEAD FREE 6.2V dual zener diodes (SOT23) D2–D5 4 Diodes Inc. AZ23C6V2-7-F 30V, 30mA Schottky diode (SOD523 Diodes Inc. SDM03U40 75V, 300mA ...

Page 3

Recommended Equipment • One 16V, 2A adjustable power supply • One 5V power supply • One voltmeter • Eight LED strings with a total forward voltage rating ≤ 32V (optional) • One PWM signal generator (optional) The MAX16807 EV kit ...

Page 4

MAX16807 Evaluation Kit The MAX16807 feature an 8-channel constant-current LED driver, with each channel capable of sinking up to 55mA of LED current. LED strings can be connected between VLED (J1-1 and J1-2) and the constant-current sink outputs to drive ...

Page 5

When the outputs are off, the LED drivers are high impedance and the feedback network now combines R13 and D6 to provide a path for the feedback current and to control VLED. Use the following equation to cal- culate the ...

Page 6

MAX16807 Evaluation Kit maximum current-sense voltage due to the addition of slope compensation. Check this factor and adjust after the slope compensation is calculated. Slope compensation is explained in detail in a later section. The saturation current limit of the ...

Page 7

The minimum slope compensation that should be added to stabilize the current loop is half of the worst-case (maximum) falling slope of inductor current. Adding a ramp, ...

Page 8

MAX16807 Evaluation Kit the voltages at the eight constant-current sink outputs and adjusts the feedback to control these voltages to a minimum value. As the LEDs carry constant current, the voltage across the LEDs does not change with varia- tions ...

Page 9

The location of the zero (Z1), decided by R1 and C6, is given by the following equation × × 2π Place the high-frequency pole (P3), formed by C6, C7, and R1, at half ...

Page 10

MAX16807 Evaluation Kit 5) The gate drive current of the MOSFET is another high-frequency switching current to consider. There are two major loops: one during the MOSFET turn- on edge and the second during the turn-off edge. The MOSFET turn-on ...

Page 11

VCC TP3 U3 3 OUT IN 2 VIN 1 GND U4 3 OUT SHDN GND VIN VIN C11 C10 C9 CLK 22μF 22μF 1μF 35V 35V L1 REF 33μH VLED GND 0.1μF TP4 C1 C2 C15 D1 ...

Page 12

MAX16807 Evaluation Kit Figure 2. MAX16807 EV Kit Component Placement Guide— Component Side 12 ______________________________________________________________________________________ Figure 3. MAX16807 EV Kit PCB Layout—Component Side ...

Page 13

Figure 4. MAX16807 EV Kit PCB Layout—Ground Layer 2 ______________________________________________________________________________________ MAX16807 Evaluation Kit Figure 5. MAX16807 EV Kit PCB Layout—Ground Layer 3 13 ...

Page 14

... 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. 14 ____________________Maxim Integrated Products, 120 San Gabriel Drive, Sunnyvale, CA 94086 408-737-7600 © 2007 Maxim Integrated Products ...

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