DC1205A Linear Technology, DC1205A Datasheet

BOARD EVAL LED DRIVER LT3592

DC1205A

Manufacturer Part Number
DC1205A
Description
BOARD EVAL LED DRIVER LT3592
Manufacturer
Linear Technology
Datasheet

Specifications of DC1205A

Current - Output / Channel
500mA
Outputs And Type
1, Non-Isolated
Voltage - Output
4.6V
Features
Dimmable, Shutdown, 2.2MHz
Voltage - Input
6 ~ 36V
Utilized Ic / Part
LT3592
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
DESCRIPTION
Demonstration circuit 1205A features the LT3592 36V
step-down 500mA LED driver with 10:1 dimming. The
demonstration circuit is designed to drive two red 500mA
LEDs mounted on the PCB from a wide input voltage range.
The high 2.2MHz switching frequency permits the use of
a small inductor and ceramic capacitors to save space
and cost. Current mode control provides fast transient
response and cycle-by-cycle current limit for short-circuit
protection. The LEDs have two brightness settings. With
BRIGHT pulled high or left fl oating, the two red LEDs are
driven with 500mA. With BRIGHT pulled to GND, the LED
current drops to 50mA for 10:1 analog dimming.
The typical effi ciency of the LT3592 DC1205A is 85%
with 12V
as shown in Figure 1. Although the board is stuffed with
two red LEDs, different LED strings can be powered from
IN
100
95
90
85
80
75
70
65
60
55
50
and the two LEDs at 4.6V total with 500mA
Figure 1. Input Voltage vs Effi ciency
4
4.6V LED
8
INPUT VOLTAGE (V)
12
16
BRIGHT (500mA)
20
24
DC1205 F01
28
LED Driver with 10:1 Dimming
the LT3592. The minimum input voltage to run the step-
down converter at 2.2MHz with a given string of LEDs is
shown in Figure 2.
The LT3592 data sheet gives a complete description of
the part, operation and applications information. The
data sheet must be read in conjunction with this Demo
Manual for DC1205A. The LT3592 is assembled in a 10-lead
plastic DFN (3mm × 2mm) DDB package with a thermally
enhanced ground pad. Proper board layout is essential
for maximum thermal performance. See the data sheet
section Layout Hints.
Design fi les for this circuit board are available at
http://www.linear.com/demo
L, LT, LTC, LTM, Linear Technology and the Linear logo are registered trademarks of Linear
Technology Corporation. All other trademarks are the property of their respective owners.
LT3592: Step-Down 500mA
DEMO MANUAL DC1205A
Figure 2. Minimum Input Voltage vs LED Voltage
12
11
10
9
8
7
6
5
4
3
2
2
4
6
INPUT VOLTAGE (V)
8
10
12
14
DC1205 F02
16
dc1205af
1

Related parts for DC1205A

DC1205A Summary of contents

Page 1

... BRIGHT pulled high or left fl oating, the two red LEDs are driven with 500mA. With BRIGHT pulled to GND, the LED current drops to 50mA for 10:1 analog dimming. The typical effi ciency of the LT3592 DC1205A is 85% with 12V and the two LEDs at 4.6V total with 500mA IN as shown in Figure 1 ...

Page 2

... LT3592 36V step-down 500mA LED driver with 10:1 dimming. Follow the test procedure outlined below and see Figure 3. 1. Set up DC1205A as shown in Figure 3 with hand-held multimeters, and a bench supply (power turned off) with voltage greater than the LED string (approximately 3 ...

Page 3

... U1 IC, LT3592EDDB#PBF , DFN10DDB Resistor, Chip, 100k, 1/16W, 1%, 0402 5 7 E1- Turret, 0.094" DEMO MANUAL DC1205A MANUFACTURER/PART NUMBER REQUIRED CIRCUIT COMPONENTS Murata, GCM31CR71H225KA55 TDK, C1005X7R1C104K TDK, C2012X5R1C475K Diode Inc., DFLS140-7-F Osram, LR W5SM-HYJY-1 Sumida, CDRH3D18NP-4R7NC Vishay, CRCW040248K7FKED Susumu International USA Inc., RL1220S-R40-F Vishay, CRCW040251K1FKED ...

Page 4

... DEMO MANUAL DC1205A SCHEMATIC DIAGRAM BOOST GND 11 dc1205af ...

Page 5

... PCB LAYOUT AND FILM Top Silkscreen Layer 2—GND Plane 1 DEMO MANUAL DC1205A Layer 1—Top Layer Layer 3—GND Plane 2 dc1205af 5 ...

Page 6

... DEMO MANUAL DC1205A PCB LAYOUT AND FILM Layer 4—Bottom Layer Bottom Solder Mask 6 Top Solder Mask Top Solder Paste Mask dc1205af ...

Page 7

... FABRICATION DRAWING Information furnished by Linear Technology Corporation is believed to be accurate and reliable. However, no responsibility is assumed for its use. Linear Technology Corporation makes no representation that the interconnection of its circuits as described herein will not infringe on existing patent rights. DEMO MANUAL DC1205A dc1205af 7 ...

Page 8

... DEMO MANUAL DC1205A Linear Technology Corporation (LTC) provides the enclosed product(s) under the following AS IS conditions: This demonstration board (DEMO BOARD) kit being sold or provided by Linear Technology is intended for use for ENGINEERING DEVELOPMENT OR EVALUATION PURPOSES ONLY and is not provided by LTC for commercial use. As such, the DEMO BOARD herein may not be complete in terms of required design-, marketing-, and/or manufacturing-related protective considerations, including but not limited to product safety measures typically found in finished commercial goods ...

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