19-2608; Rev 0; 10/02
MAX1570 Evaluation Kit
General Description
The MAX1570 evaluation kit (EV kit) is a fully assembled
and tested surface-mount circuit board. The EV kit con-
tains the MAX1570, a white LED driver with high-efficien-
cy charge pump. The EV kit accepts a 2.7V to 5.5V input
and drives up to five white LEDs with regulated constant
current for uniform intensity. The MAX1570 runs at 1MHz
fixed frequency, allowing tiny external components.
o
2.7V to 5.5V Input Range
o
30mA/LED Drive Capability
o
Five LEDs at 150mA Total Current
o
0.1碌A(chǔ) (typ) IC Shutdown Current
o
Digital PWM LED Dimming Control
o
Fixed 1MHz Switching Frequency
o
Surface-Mount Component Construction
o
16-Pin 4mm x 4mm Thin QFN Package
o
Fully Assembled and Tested
Features
o
Excellent (0.3%) LED-to-LED Current Matching
Evaluates: MAX1570
Component List
DESIGNATION
QTY
DESCRIPTION
1碌F 鹵10%, 10V
X5R ceramic capacitors (0603)
TDK C1608X5R1A105K or
Taiyo Yuden JMK107BJ105KA
4.7碌F 鹵20%, 6.3V
X5R ceramic capacitor (0805)
Taiyo Yuden JMK212BJ475MG or
TDK C2012X5R0J475M
Not installed,
ceramic capacitor (0603)
Surface-mount white LEDs
3-pin headers
9.09k鈩?鹵1% resistor (0603)
Not installed, resistor (0603)
MAX1570ETE
(16-pin QFN (4mm x 4mm))
Shunts
MAX1570 PC board
MAX1570 EV kit data sheet
MAX1570 data sheet
PART
MAX1570EVKIT
Ordering Information
TEMP RANGE IC PACKAGE
0擄C to +70擄C
16 Thin QFN (4mm x 4mm)
C1, C3, C4
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Quick Start
The MAX1570 EV kit is fully assembled and tested.
Perform the following steps to verify board operation.
Do not turn on the power supply until all connections
are completed:
1) Verify that shunts are across pins 1 and 2 of jumpers
JU1 (EN1) and JU2 (EN2).
2) Connect a 2.7V to 5.5V power supply to the VIN pad.
Connect the power-supply ground to the GND pad to
the right of VIN.
3) Turn on the power supply.
4) Verify that all five white LEDs are on with uniform
intensity.
For instructions on dimming control, see Table 1.
C2
1
C5
D1鈥揇5
JU1, JU2
R1
R2, R3
U1
None
None
None
None
0
5
2
1
0
1
2
1
1
1
________________________________________________________________
Maxim Integrated Products
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For pricing, delivery, and ordering information, please contact Maxim/Dallas Direct! at
1-888-629-4642, or visit Maxim鈥檚 website at www.maxim-ic.com.
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