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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.
主要特性
- 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
- Boost controller section
精选 视频
Watch the ALED1262ZT video, an automotive-grade 12-Channel LED Driver for advanced rear lighting solutions
评估工具
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图片 产品型号 制造商 描述 
STEVAL-ILL035V1 -- 基于LED7708和STM32F103C6T6A的多通道LED驱动器，具有用于中等、大尺寸LCD面板背光的集成增压控制器 
STEVAL-ILL035V2 ST 基于LED7708和STM32F103C6T6（子板）的多通道LED驱动器，具有用于中等/大尺寸LCD面板背光的集成增压控制器 产品型号基于LED7708和STM32F103C6T6A的多通道LED驱动器，具有用于中等、大尺寸LCD面板背光的集成增压控制器
基于LED7708和STM32F103C6T6（子板）的多通道LED驱动器，具有用于中等/大尺寸LCD面板背光的集成增压控制器
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质量与可靠性
| 产品型号 | Marketing Status | 封装 | 等级规格 | 符合RoHS级别 | 材料声明** |
|---|---|---|---|---|---|
| LED7708 | 预览 | VFQFPN 48 7x7x1.0 | 工业 | Ecopack2 | |
| LED7708TR | 批量生产 | VFQFPN 48 7x7x1.0 | 工业 | Ecopack2 |
(**) st.com上提供的材料声明表单可能是基于包装系列中最常用的封装的通用文档。因此，它们可能不是100%适用于特定的设备。有关特定设备的信息，请联系 销售支持 。
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样片和购买
| 产品型号 | 从分销商订购 | 从ST订购 | 供货状态 | ECCN (US) | ECCN (EU) | 包装类型 | 封装 | 温度（ºC） | Country of Origin | Budgetary Price (US$)*/Qty | ||
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 最小值 | 最大值 | |||||||||||
| LED7708TR | 3 distributors | 获取样片 | 批量生产 | EAR99 | NEC | Tape And Reel | VFQFPN 48 7x7x1.0 | -40 | 150 | PHILIPPINES | 1.591 / 1k | |
| LED7708 | 没有经销商，请联系我们的销售办事处 | 预览 | EAR99 | NEC | Tray | VFQFPN 48 7x7x1.0 | -40 | 150 | PHILIPPINES | 1.591 / 1k | ||
供货状态
预览ECCN (US)
EAR99Budgetary Price (US$)*/Qty
1.591 / 1k