LED7708

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16 channels x 85 mA LED driver with boost controller and 4-wire serial interface

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  • The LED7708 has been specifically designed to supply several LEDs starting from a single low-voltage rail. It integrates a boost controller, sixteen current generators and a 4-wire serial interface. The boost controller regulates the output voltage in an adaptive way, according to the LED requirements, resulting in an improved overall efficiency. All the current generators are 40 V-rated, allowing the LED7708 to drive several LEDs in series on each channel. The channels can be put in parallel for higher output current.

    The brightness of the LEDs is controlled by using the serial interface. A selectable 12-bit or 16-bit grayscale brightness control allows independent PWM on each channel. A programmable on-chip dimming oscillator is provided for external circuitry simplification. The device has dedicated pins to lock to an external synchronization with other devices (master or slave) for noise reduction in multi-device applications. The LED7708 implements basic protection (OVP, OCP and thermal shutdown) as well as LED array protection. It can detect and manage open-LED and shorted-LED faults and different fault-management options are available in order to cover most application needs.

    Key Features

    • Boost controller section
      • 3.6 V to 36 V input voltage range (LDO)
      • Adaptive output voltage for high efficiency
      • Internal +5 V LDO for gate driver supply
      • Internal +3.3 V LDO for device supply
      • High performance external MOSFET driver
      • 250 kHz to 1 MHz switching frequency
      • Programmable OV and OC protection
      • Fixed frequency peak current-mode control
      • External synchronization for multi-device application
      • Overtemperature alert and thermal shutdown
    • LED array driver section
      • 16 channels with 85 mA/ch current capability
      • ±2% channel current accuracy
      • ±2% channel-to-channel current matching
      • LED short-circuit and open channel fault detection and management
      • 4-wire, 30 MHz serial interface
      • 16 x16-bit, 1x256-bit or 1x192-bit serial data formats
      • Grouped or independent channel PWM control
      • Selectable 12/16-bit grayscale brightness control for local dimming
      • Programmable internal dimming oscillator
      • Programmable grayscale latency
      • Master/slave chain configuration supported

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Lighting and Controls

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Evaluation Tools

    • Part Number

      Multi-channel LED driver with integrated boost controller for medium, large LCD panel backlight based on LED7708 and STM32F103C6T6A

      Multi-channel LED driver with integrated boost controller for medium/large LCD panel backlight based on LED7708 and STM32F103C6T6 - daughter board

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Technical Documentation

    • Description Version Size Action
      DS8850
      16 channels x 85 mA LED driver with boost controller and 4-wire serial interface
      1.0
      855.41 KB
      PDF
      DS8850

      16 channels x 85 mA LED driver with boost controller and 4-wire serial interface

    • Description Version Size Action
      AN4578
      16-channels LED driver with independent PWM dimming control based on LED7708
      2.0
      2.38 MB
      PDF
      AN4578

      16-channels LED driver with independent PWM dimming control based on LED7708

Publications and Collaterals

    • Description Version Size Action
      LED drivers for backlighting and lighting applications 2.1
      1.78 MB
      PDF

      LED drivers for backlighting and lighting applications

Quality and Reliability

Part Number Marketing Status Package Grade RoHS Compliance Grade Material Declaration**
LED7708
Preview
VFQFPN 48 7x7x1.0 Industrial Ecopack2
LED7708TR
Active
VFQFPN 48 7x7x1.0 Industrial Ecopack2

LED7708

Package:

VFQFPN 48 7x7x1.0

Material Declaration**:

PDF XML

Marketing Status

Preview

Package

VFQFPN 48 7x7x1.0

Grade

Industrial

RoHS Compliance Grade

Ecopack2

LED7708TR

Package:

VFQFPN 48 7x7x1.0

Material Declaration**:

PDF XML

Marketing Status

Active

Package

VFQFPN 48 7x7x1.0

Grade

Industrial

RoHS Compliance Grade

Ecopack2

(**) The Material Declaration forms available on st.com may be generic documents based on the most commonly used package within a package family. For this reason, they may not be 100% accurate for a specific device. Please contact our sales support for information on specific devices.

eDesignSuite

LED Driver

Input

V This option is required. And must be less than or equal to Volt. Max [V]
V This option is required. And must be greater than or equal to Volt. Min [V]

LED custom

V This option is required.
A This option is required.
Ω This option is required.

LEDs

This option is required. And must be a whole positive number between 1 and 20.
This option is required. And must be a whole positive number between 1 and 20.

Sample & Buy

Part Number
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ECCN (US)
ECCN (EU)
Packing Type
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Temperature (°C) Country of Origin
Budgetary Price (US$)*/Qty
min
max
LED7708TR Available at 3 distributors

Distributor availability ofLED7708TR

Distributor Name
Region Stock Min. Order Third party link
DIGIKEY WORLDWIDE 1387 1 Order Now
MOUSER WORLDWIDE 2331 1 Order Now
Farnell Element14 EUROPE 2341 1 Order Now

Distributor reported inventory date: 2020-09-18

Distributor Name

DIGIKEY

Stock

1387

Min.Order

1

Region

WORLDWIDE Order Now

MOUSER

Stock

2331

Min.Order

1

Region

WORLDWIDE Order Now

Farnell Element14

Stock

2341

Min.Order

1

Region

EUROPE Order Now

Distributor reported inventory date: 2020-09-18

Sample & Buy Buy now
Active
EAR99 NEC Tape And Reel VFQFPN 48 7x7x1.0 -40 150 PHILIPPINES 1.591 / 1k
LED7708 No availability of distributors reported, please contact our sales office
Preview
EAR99 NEC Tray VFQFPN 48 7x7x1.0 -40 150 PHILIPPINES 1.591 / 1k

LED7708TR

Marketing Status

Active

ECCN (US)

EAR99

Budgetary Price (US$)*/Qty

1.591 / 1k

Distributor availability ofLED7708TR

Distributor Name
Region Stock Min. Order Third party link
DIGIKEY WORLDWIDE 1387 1 Order Now
MOUSER WORLDWIDE 2331 1 Order Now
Farnell Element14 EUROPE 2341 1 Order Now

Distributor reported inventory date: 2020-09-18

Distributor Name

DIGIKEY

Stock

1387

Min.Order

1

Region

WORLDWIDE Order Now

MOUSER

Stock

2331

Min.Order

1

Region

WORLDWIDE Order Now

Farnell Element14

Stock

2341

Min.Order

1

Region

EUROPE Order Now

Distributor reported inventory date: 2020-09-18

ECCN (EU)

NEC

Packing Type

Tape And Reel

Package

VFQFPN 48 7x7x1.0

Operating Temperature (°C)

(min)

-40

(max)

150

Budgetary Price (US$)* / Qty

1.591 / 1k

Country of Origin

PHILIPPINES

LED7708

Marketing Status

Preview

ECCN (US)

EAR99

Budgetary Price (US$)*/Qty

1.591 / 1k

ECCN (EU)

NEC

Packing Type

Tray

Package

VFQFPN 48 7x7x1.0

Operating Temperature (°C)

(min)

-40

(max)

150

Budgetary Price (US$)* / Qty

1.591 / 1k

Country of Origin

PHILIPPINES

(*) Suggested Resale Price per unit (USD) for BUDGETARY USE ONLY. For quotes, prices in local currency, please contact your local ST Sales Office  or our Distributors