LM3503ITL-25EV National Semiconductor, LM3503ITL-25EV Datasheet

BOARD EVALUATION LM3503ITL-25

LM3503ITL-25EV

Manufacturer Part Number
LM3503ITL-25EV
Description
BOARD EVALUATION LM3503ITL-25
Manufacturer
National Semiconductor
Series
PowerWise®r
Datasheets
1.LM3503SQ-16NOPB.pdf (20 pages)
2.LM3503ITL-25EV.pdf (7 pages)

Specifications of LM3503ITL-25EV

Current - Output / Channel
9mA
Outputs And Type
2, Non-Isolated
Voltage - Output
25 V
Features
Dual Display(s)
Voltage - Input
2.7 ~ 5.5V
Utilized Ic / Part
LM3503
Core Chip
LM3503
Topology
Boost
No. Of Outputs
1
Output Voltage
25V
Input Voltage
2.5V To 5.5V
Development Tool Type
Hardware - Eval/Demo Board
Lead Free Status / RoHS Status
Not applicable / Not applicable
© 2006 National Semiconductor Corporation
AN-1407 LM3502/03
Evaluation Board
General Description
The LM3502/03 evaluation board is a working demonstration
of a step up DC-DC converter. The LM3502/03 is a white
LED driver for lighting applications. The LM3502/03 contains
two LED strings designed for dual displays with indepen-
dence EN pins. The LM3502 LED current can be adjusted
with PWM signal while the LM3503 LED current can be
adjusted with a DC voltage or RC filtered PWM (pulse-width-
modulated) signal at the Cntrl pin. The LM3502/03 can drive
up to 10 white LEDs. Both devices feature internal over
voltage protection (OVP) and under voltage protection
(UVP). For evaluation purpose, the evaluation board is as-
sembled
(LM3503ITL) and 44V version (LM3502ITL). The LM3502/03
Typical Application
in
micro
SMD
package
FIGURE 1. Typical Application Circuit LM3502
AN201689
for
25V
version
National Semiconductor
Application Note 1407
Anne Lu
July 2006
are also available in 16-LLP package (see ordering informa-
tion). For further information on boost converter topology,
device electrical characteristics, and component selection,
please refer to the LM3502 and LM3503 datasheets.
Operating Conditions
•
• OVP options: 16V, 25V, 35V & 44V (see ordering infor-
• 10 Bump MicroSMD or 16 Pin LLP package
• Ambient temperature (T
• Junction temperature (T
mation)
V
IN
range: 2.5V ≤ V
IN
≤ 5.5V
A
J
) range: -30C to +125C
) range: -30C to +85C
20168906
www.national.com

Related parts for LM3503ITL-25EV

Image
Part Number
Description
Manufacturer
Datasheet
Request R
LM3503ITL-35/NOPB
Part Number:
LM3503ITL-35/NOPB
Description:
IC LED DRVR WHT BCKLT 10MICROSMD
Manufacturer:
National Semiconductor
Datasheet:
LM3503SQ-16NOPB.pdf (20 pages)
LM3503ITL-16/NOPB
Part Number:
LM3503ITL-16/NOPB
Description:
IC LED DRVR WHT BCKLT 10MICROSMD
Manufacturer:
National Semiconductor
Datasheet:
LM3503SQ-16NOPB.pdf (20 pages)
LM3503ITL-25/NOPB
Part Number:
LM3503ITL-25/NOPB
Description:
IC LED DRVR WHT BCKLT 10MICROSMD
Manufacturer:
National Semiconductor
Datasheet:
LM3503SQ-16NOPB.pdf (20 pages)
LM3503ITL-44
Part Number:
LM3503ITL-44
Description:
IC LED DRVR WHT BCKLT 10MICROSMD
Manufacturer:
National Semiconductor
Datasheet:
LM3503SQ-16NOPB.pdf (20 pages)
LM3503ITL-44/NOPB
Part Number:
LM3503ITL-44/NOPB
Description:
IC, LED DRIVER, CONSTANT CURRENT, µSMD16
Manufacturer:
National Semiconductor
Datasheet:
LM3503ITL-44NOPB.pdf (20 pages)
LM3503ITL-16
Part Number:
LM3503ITL-16
Description:
Dual-Display Constant Current LED Driver with Analog Brightness Control
Manufacturer:
National Semiconductor
Datasheet:
LM3503ITL-16.pdf (20 pages)
LM3503ITL-25
Part Number:
LM3503ITL-25
Description:
LM3503 Dual-Display Constant Current LED Driver with Analog Brightness Control; Package: MICRO SMD; No of Pins: 10; Qty per Container: 250; Container: Reel
Manufacturer:
National Semiconductor
Datasheet:
LM3503ITL-25.pdf (20 pages)
MC1408P8
Part Number:
MC1408P8
Description:
National Semiconductor [8-Bit D/A Converter]
Manufacturer:
National Semiconductor
Datasheet:
MC1408P8.pdf (12 pages)
CS1301
Part Number:
CS1301
Description:
National Semiconductor [Media Coprocessor]
Manufacturer:
National Semiconductor
Datasheet:
CS1301.pdf (25 pages)
LM4832N
Part Number:
LM4832N
Description:
Digitally Controlled Tone and Volume Circuit with Stereo Audio Power Amplifier, Microphone Preamp Stage and National 3D Sound
Manufacturer:
National Semiconductor
Datasheet:
LM4832N.pdf (23 pages)
LM4832M
Part Number:
LM4832M
Description:
Digitally Controlled Tone and Volume Circuit with Stereo Audio Power Amplifier, Microphone Preamp Stage and National 3D Sound
Manufacturer:
National Semiconductor
Datasheet:
LM4832M.pdf (23 pages)
LM4546
Part Number:
LM4546
Description:
AC97 Rev 2 Codec with Sample Rate Conversion and National 3D Sound
Manufacturer:
National Semiconductor
LP2981AIM5X-2.7
Part Number:
LP2981AIM5X-2.7
Description:
Manufacturer:
National Semiconductor
Datasheet:
LP2981AIM5X-2.7.pdf (16 pages)
LP2988AIMMX-3.8
Part Number:
LP2988AIMMX-3.8
Description:
Manufacturer:
National Semiconductor
LP3988IMFX-2.6
Part Number:
LP3988IMFX-2.6
Description:
Manufacturer:
National Semiconductor
Datasheet:
LP3988IMFX-2.6.pdf (11 pages)

LM3503ITL-25EV Summary of contents

Page 1

... For evaluation purpose, the evaluation board is as- sembled in micro SMD package (LM3503ITL) and 44V version (LM3502ITL). The LM3502/03 Typical Application © 2006 National Semiconductor Corporation National Semiconductor Application Note 1407 Anne Lu July 2006 are also available in 16-LLP package (see ordering informa- tion) ...

Page 2

Typical Application (Continued) PWM Dimming If PWM dimming is desired to control the brightness of the LED string, care must be taken to balance the tradeoffs between audible noise and brigthness control. For best PWM duty cycle vs current linearity, ...

Page 3

PWM Dimming (Continued) FIGURE 3. Typical Circuit for PWM Dimming (LM3503) LED Current Setting LEDcurrent is set using the following equation for LM3502/LM3503: If analog control is used for brightness control in the LM3503, the relationship between V using the ...

Page 4

... SANB LM3503ITL-16 SANB LM3503ITLX-16 L00048B LM3503SQ-16 L00048B LM3503SQX-16 SAPB LM3503ITL-25 SAPB LM3503ITLX-25 L00049B LM3503SQ-25 L00049B LM3503SQX-25 SARB LM3503ITL-35 SARB LM3503ITLX-35 L00044B LM3503SQ-35 L00044B LM3503SQX-35 SDLB LM3503ITL-44 SDLB LM3503ITLX-44 L00050B LM3503SQ-44 L00050B LM3503SQX-44 4 20168902 (SQA16A) Package Marking Supplied As SBHB 250 units T&R SBHB 3000 units T& ...

Page 5

Pin Descriptions Bump # LLP Pin # & & DAP Printed Circuit Board (PCB) ...

Page 6

Printed Circuit Board (PCB) Layout Top Traces Top Pads www.national.com (Continued) Bottom Traces 20168911 Bottom Pads 20168915 6 20168912 20168916 ...

Page 7

... Printed Circuit Board (PCB) Layout Bill of Materials for LM3502ITL & LM3503ITL Device LM3502ITL-44 LM3503ITL- OUT R1 DIODE WHITE LED INDUCTOR Test pins: VOUT, SW, VIN, FB, CNTRL, EN1, EN2 & GND National does not assume any responsibility for use of any circuitry described, no circuit patent licenses are implied and National reserves the right at any time without notice to change said circuitry and specifications ...

Related keywords