Document
19-3246; Rev 0; 4/04
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MAX1583 Evaluation Kit
General Description
The MAX1583 evaluation kit (EV kit) is a fully assembled and tested surface-mount circuit board for evaluating the MAX1583 white LED flash boost converter. The EV kit accepts a 2.6V to 5.5V input voltage and drives up to five series white LEDs with a constant current to provide camera flash/strobe in cell phones, PDAs, DSCs, and other hand-held devices. The MAX1583 switching frequency is 1MHz, allowing tiny external components. Two logic inputs control four modes of operation: shutdown mode (0.5µA max), movie mode for high-efficiency continuous lighting (programmable up to 100mA), precharge mode for charging a reservoir capacitor to 24V while the LEDs are off (POK output indicates a full reservoir capacitor), and strobe mode for firing the flash during an exposure with a regulated current programmable up to 300mA (100mA with installed components). A pushbutton pulse generator is installed to simulate a 30ms flash pulse. The MAX1583 comes with the MAX1583X (1A current limit) installed, but the entire MAX1583 family can be evaluated with this EV kit with minor component changes.
Features
♦ Supports Up to 5 LEDs for Strobe/Flash ♦ Four Operational Modes Strobe: Up to 300mA (Preset to 100mA) Precharge: With POK Indicator Movie: Up to 100mA (Preset to 20mA) Shutdown: 0.01µA (typ) Quiescent Current ♦ Input Current Limiting 1A (MAX1583X) 500mA (MAX1583Y) 250mA (MAX1583Z) ♦ 24V Output Overvoltage Protection ♦ 80% Efficient (PLED / PIN) Movie Mode ♦ Thermal-Shutdown Protection ♦ 10-Lead 3mm x 3mm TDFN Package ♦ Surface-Mount Components ♦ Fully Assembled and Tested
Evaluates: MAX1583
Ordering Information
PART MAX1583EVKIT TEMP RANGE 0°C to +70°C IC PACKAGE 10 TDFN 3mm x 3mm
Note: To evaluate the MAX1583Y or MAX1583Z, request a MAX1583YETB or MAX1583ZETB free sample with the MAX1583 EV kit.
Component List
DESIGNATION QTY C1 1 DESCRIPTION 22µF, 6.3V X5R ceramic capacitor (0805) TDK C2012X5R0J226M 10µF ±10%, 25V X5S ceramic capacitor (1206) Taiyo Yuden TMK316C106KL 0.01µF ±10%, 16V X7R ceramic capacitors (0402) TDK C1005X7R1E103K 0.1µF ±10%, 25V X7R ceramic capacitor (0603) TDK C1608X7R1E104K 30V, 500mA, VF = 0.4V Schottky diode (SOD-323) Diodes, Inc. B0530WS DESIGNATION QTY D2 1 DESCRIPTION White LED module Nichia NBCW011T 30V, 100mA Schottky diode (SOD 523) Central Semiconductor CMOSH-3 3-pin headers 2-pin header 4.7µH, 1.06A, 450mΩ TOKO 984FB-4R7M 6.04kΩ ±1% resistor (0402) 3.01kΩ ±1% resistor (0402) 100kΩ ±5% resistors (0402) Momentary pushbutton switch Panasonic EVQ-PHP03T
D5 JU1, JU2 JU3 L1 R1 R2 R3, R4, R5 SW1
1 2 1 1 1 1 3 1
C2
1
C3, C4
2
C5
1
D1
1
________________________________________________________________ Maxim Integrated Products
1
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.
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MAX1583 Evaluation Kit Evaluates: MAX1583
Component List (continued)
DESIGNATION QTY U1 U2 None None 1 1 2 1 DESCRIPTION MAX1583XETB (10-pin TDFN) MAX6422XS23 (SOT23) Shunts MAX1583 EV kit PC board
13) Remove the shunt on JU2 and place it between pins 1 and 2 of JU3. Remove the shunt on JU1 and place it between pins 1 and 2 of JU1. This places the MAX1583 into precharge mode. 14) Verify that the white LED module is off. Verify that VOUT is approximately 23.5V and VPOK is approximately 2.7V. 15) Sweep the power supply to 5.5V. Verify that the LED module remains off, VOUT is approximately 23.5V, and VPOK tracks VVIN. 16) Set the power supply to 3.3V. 17) Push the button on the bottom of the EV kit. This enables a strobe/flash. 18) Verify that the LED module flashes.
Recommended Equipment
• 0 to +6V at 1A, variable-output power supply • Two digital multimeters (DMMs)
Quick Start
The MAX1583 EV kit is fully assembled and tested. Perform the following steps to verify board operation: 1) Verify that shunts are across pins 2 and 3 of jumpers JU1 (EN2) and JU2 (EN1). This places the MAX1583 into shutdown mode. 2) Verify that JU3 is open. 3) Preset the power supply to 2.7V and turn off. Do not turn on the power supply until all connections are completed. 4) Connect the positive lead of the power supply to the VIN pad on the EV kit PC board. Connect the ground lead of the power supply to the GND pad on the EV kit PC board. 5) Connect the positive lead of one DMM to the OUT pad on the EV kit PC board and connect the negative lead of the DMM to the GND pad. This DMM measures the voltage at OUT (VOUT). 6) Connect the positive lead of the other DMM to POK on the EV kit PC board and connect the negative lead of the DMM to the GND pad. This DMM measures the voltage at POK (VPOK). 7) Turn on the power supply. 8) Verify that the white LED module is off. 9) Remove the shunt on JU2 and place it between pins 1 and 2 of JU2. This places the MAX1583 into movie mode. 10) Verify that the white LED module lights up. VOUT should .