STEVAL-ILL021V1 STMicroelectronics, STEVAL-ILL021V1 Datasheet

BOARD EVAL LCD BACKLIGHT LED7707

STEVAL-ILL021V1

Manufacturer Part Number
STEVAL-ILL021V1
Description
BOARD EVAL LCD BACKLIGHT LED7707
Manufacturer
STMicroelectronics
Datasheets

Specifications of STEVAL-ILL021V1

Design Resources
STEVAL-ILL021V1 Bill of Material STEVAL-ILL021V1 Schematic
Current - Output / Channel
85mA
Outputs And Type
6, Non-Isolated
Voltage - Output
36 V
Features
Dimmable, Extra 5V Output
Voltage - Input
4.5 ~ 36 V
Utilized Ic / Part
LED7707
Description/function
LCD backlight demonstration board
Operating Voltage
4.5 V to 36 V
Product
Display Modules
Core Chip
LED7707
No. Of Outputs
1
Output Voltage
36V
Dimming Control Type
PWM
Mcu Supported Families
LED7707
Lead Free Status / RoHS Status
Lead free by exemption / RoHS compliant by exemption
For Use With/related Products
LED7707
Other names
497-10044

Available stocks

Company
Part Number
Manufacturer
Quantity
Price
Part Number:
STEVAL-ILL021V1
Manufacturer:
STMicroelectronics
Quantity:
1
Features
Description
This demonstration boards is based on the
LED7707 and implements a high efficiency
monolithic boost converter and six controlled
current generators (rows) specifically designed to
supply LEDs arrays used in the backlight of LCD
panels.
The device can manage an output voltage up to
36 V (i.e. ten white-LEDs per row).
May 2009
For further information contact your local STMicroelectronics sales office.
Features boost section
– 4.5 V to 36 V input voltage range
– internal power MOSFET
– internal +5 V LDO for device supply
– up to 36 V output voltage
– constant frequency peak current-mode
– 250 kHz to 1 MHz adjustable switching
– external sync for multi-device application
– pulse-skip power saving mode at light load
– programmable soft-start
– programmable OVP protection
– single ceramic output capacitor
– non-latched thermal shutdown
Features backlight driver section
– six rows with 85 mA maximum current
– up to 10 white LEDs per row
– rows disable option
– less than 10 µs minimum dimming time
– ±2.0% current matching between rows
– LED failure (open and short circuit)
RoHS compliant
control
frequency
capability (adjustable)
detection
LCD panels backlight demonstration board
Doc ID 15677 Rev 1
The generators can be externally programmed to
sink up to 85 mA and can be dimmed via a PWM
signal (1% of minimum dimming duty cycle at
1kHz can be managed).
The device allows to detect and manage the open
and shorted LED faults and to let unused rows
floating.
Basic protections (output overvoltage, internal
MOSFET overcurrent and thermal shutdown) are
provided.
STEVAL-ILL021V1
based on the LED7707
STEVAL-ILL021V1
www.st.com
Data brief
1/5
5

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STEVAL-ILL021V1 Summary of contents

Page 1

... The device allows to detect and manage the open and shorted LED faults and to let unused rows floating. Basic protections (output overvoltage, internal MOSFET overcurrent and thermal shutdown) are provided. Doc ID 15677 Rev 1 based on the LED7707 Data brief STEVAL-ILL021V1 www.st.com 1/5 5 ...

Page 2

... Circuit schematic and PCB layout 1 Circuit schematic and PCB layout Figure 1. Schematic diagram Figure 2. Top side component placement 2/5 Doc ID 15677 Rev 1 STEVAL-ILL021V1 ...

Page 3

... STEVAL-ILL021V1 Figure 3. Bottom side Circuit schematic and PCB layout Doc ID 15677 Rev 1 3/5 ...

Page 4

... Revision history 2 Revision history Table 1. Document revision history Date 06-May-2009 4/5 Revision 1 Initial release. Doc ID 15677 Rev 1 STEVAL-ILL021V1 Changes ...

Page 5

... STEVAL-ILL021V1 Information in this document is provided solely in connection with ST products. STMicroelectronics NV and its subsidiaries (“ST”) reserve the right to make changes, corrections, modifications or improvements, to this document, and the products and services described herein at any time, without notice. All ST products are sold pursuant to ST’s terms and conditions of sale. ...

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