产品概述
描述
ALED7709x are automotive-grade (AEC-Q100 Grade1 qualified) LED drivers combining a boost/SEPIC controller and four low-side constant-current sinkers, designed to drive strings of high brightness LEDs. The switching converter section provides the supply rail for the LED strings, whose value is constantly optimized for maximum efficiency. The boost/SEPIC controller supports the external synchronization and spread spectrum. ALED7709x can work simultaneously or exclusively in standalone mode (SAM), controlled only by PWMI signal, and in bus driven mode (BDM) through an I2C serial interface. The brightness of the four LED strings can be controlled either in global or local mode. In global mode, the ALED7709x supports a mixed PWM and analog dimming to improve the brightness range capability. Only the BDM provides full access to ALED7709x advanced features. PWM dimming frequency can be programmed changing the setting of the internal 16-bit counter, while an internal oscillator avoids the use of an external clock source.
The ALED7709A is dedicated to BDM while ALED7709B is more suitable for SAM. ALED7709x implement basic protections (overvoltage, overcurrent, and thermal shutdown) as well as “Open and Short” LED fault detection, with optional channel auto-disconnect in case of fault.
The devices support an optional P-channel MOSFET in series to the input. It protects the system, LED strings and channels in case of some faulty conditions, output short-to-ground or excessive input voltage transients and it also reduces the power consumption when in standby.
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所有功能
- AEC-Q100 Grade1 qualified
- Operating temperature range -40 °C < TJ < 150 °C
- 4.5 V to 42 V operating input voltage range
- Up to 60 V tolerant for load dump @ 24 V battery
- Supports battery cranking events down to 4 V supply
- Simultaneous or exclusive control by PWMI and I2C interface
- Switching controller section
- Low shutdown current: ISHDN < 15 µA
- Fixed frequency peak current-mode controller
- Cycle-by-cycle power switch OCP
- Adjustable (250 kHz to 2.2 MHz) switching frequency with optional spread spectrum
- Synchronized boost and SEPIC topologies support
- Line switch control for standby power saving and inrush current protection
- Input overvoltage and output short-circuit protection
- LED strings control section
- 4 x 40 V rated constant current outputs
- Adjustable up to 200 mA per channel
- ±2% typ. output current accuracy
- Mixed PWM and Analog dimming
- 100 Hz to 12.8 kHz dimming frequency
- Dimming ratio 10000:1 at 100 Hz
- LED temperature sensor (NTC) management
- Selectable channels phase-shifting and adjustable Rise/Fall time for reducing EMI
- Open channel, LED short-circuit detection
- Two versions available: ALED7709A and ALED7709B
- AEC-Q100 Grade1 qualified
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EDA符号、封装和3D模型
意法半导体 - ALED7709
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符号
封装
3D模型
所有资源
| 资源标题 | 版本 | 更新时间 |
|---|
SIMPLIS models (1)
| 资源标题 | 版本 | 更新时间 | ||
|---|---|---|---|---|
| ZIP | 2024.06 | 14 Jun 2024 | 14 Jun 2024 |
质量与可靠性
| 产品型号 | Marketing Status | 包 | 等级规格 | 符合RoHS级别 | Longevity Commitment | Longevity Starting Date | 材料声明** |
|---|---|---|---|---|---|---|---|
| ALED7709ATR | 批量生产 | QFPN 5X5X0.90 24L PITCH 0.65 A.G | 汽车应用 | Ecopack3 | 10 | 2023-06-06T00:00:00.000+02:00 | |
| ALED7709BTR | 批量生产 | QFPN 5X5X0.90 24L PITCH 0.65 A.G | 汽车应用 | Ecopack3 | 10 | 2023-06-06T00:00:00.000+02:00 |
(**) 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。
样片和购买
| 产品型号 | 供货状态 | Budgetary Price (US$)*/Qty | 从ST订购 | Order from distributors | 包 | 包装类型 | RoHS | Country of Origin | ECCN (US) | ECCN (EU) | Operating temperature (°C) | Operating Temperature (°C) (max) | ||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 最小值 | 最大值 | |||||||||||||
| ALED7709ATR | | | distributors 无法联系到经销商，请联系我们的销售办事处 | |||||||||||
| ALED7709BTR | | | distributors 无法联系到经销商，请联系我们的销售办事处 | |||||||||||
ALED7709ATR 批量生产
ALED7709BTR 批量生产