MAX1573 Datasheet, PDF (1/4 Pages) Maxim Integrated Products – MAX1573 Evaluation Kit

19-2894; Rev 1; 4/04
MAX1573 Evaluation Kit
General Description
The MAX1573 evaluation kit (EV kit) is a fully assembled
and tested surface-mount circuit board. The EV kit con-
tains the MAX1573, a white LED driver with a high-effi-
ciency charge pump. The EV kit accepts a 2.7V to 5.5V
input voltage and drives up to 4 white LEDs with regu-
lated constant current for uniform intensity. The
MAX1573 runs at 1MHz fixed frequency, allowing tiny
external components. An EV kit is available for both the
UCSP and the TQFN packages.
Component List
DESIGNATION QTY
DESCRIPTION
C1–C4
1µF ±10%, 6.3V X5R ceramic
4 capacitors (0603)
TDK C1608X5R0J105K
D1–D4
JU1, JU2
JU3
R1
U1
None
None
4
Surface-mount white LEDs
Nichia NSCW215T
2 3-pin headers
1 Not installed
1 7.5kΩ ±1% resistor (0603)
1 MAX1573EBE or MAX1573ETE
2 Shunts
1 MAX1573EVKIT PC board
Features
o Proprietary Adaptive 1x/1.5x Modes
o High Efficiency (P_LEDs / P_BATT), Up to 92%
o 2% LED Current Matching
o 28mA/LED Drive Capability
o Eliminates Ballast Resistor
o Low 0.1µA Shutdown Current
o 2.7V to 5.5V Input Voltage Range
o Tiny 2.1 x 2.1 x 0.6mm UCSP Package
o Surface-Mount Components
o Fully Assembled and Tested
Ordering Information
PART
MAX1573EVKIT
MAX1573TQFNEVKIT
TEMP RANGE
0°C to +70°C
0°C to +70°C
IC PACKAGE
14 UCSP 4 x 4
16 TQFN
Component Suppliers
SUPPLIER
COMPONENT
PHONE
Nichia
Panasonic
LEDs
Resistors
717-285-2323
714-373-7366
Taiyo Yuden
TDK
Capacitors
Capacitors
408-573-4150
888-835-6646
Note: Please indicate that you are using the MAX1573 when contacting these suppliers.
WEBSITE
www.nichia.com
www.maco.panasonic.co.jp
www.t-yuden.com
www.component.tdk.com
Quick Start
Recommended Equipment
For evaluation of either EV kit:
• Variable-output power supply capable of supplying
up to +5.5V at 300mA
Procedure
The MAX1573 EV kit is fully assembled and tested.
Perform the following steps to verify board operation.
Do not turn on the power supply until all connec-
tions are completed:
1) Verify that shunts are across pins 1 and 2 of JU1
(EN1) and JU2 (EN2).
2) Preset the power supply to 2.7V and turn off.
3) Connect the positive lead of the power supply to the
VIN pad on the EV kit board. Connect the ground
lead of the power supply to the GND pad directly
below the VIN pad.
4) Turn on the power supply.
5) Verify that all 4 white LEDs are on with uniform
intensity.
UCSP is a trademark of Maxim Integrated Products, Inc.
________________________________________________________________ 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.