LED1202数据手册集成电路（IC）的LED驱动器规格书PDF

描述 Description

The LED1202 is a 12-channel low quiescent current LED driver; it guarantees 5 V output driving capability and each channel is able to provide up to 20 mA with a headroom voltage of 350 mV (typ.) only. The output current can be adjusted separately for each channel by 8-bit analog and 12-bit digital dimming control.

A slow turn-on and turn-off time improves the system low noise generation performance; moreover, the phase shifting function helps to reduce the inrush current. Eight patterns can be stored in the internal registers for automatic sequencing without MCU intervention.

The pattern sequence can be also configured for duration time and number of repetition. For multi-device applications, a common clock domain can be shared for timing synchronization. The device includes thermal shutdown and open LED detection.

The device I²C interface is based on fast mode specification and works up to 400 kHz. Eight I²C addresses are possible by using two configuration pins (A0/A1) only.

The LED1202 is available in WLCSP20 package 1.71 x 2.16 x 0.5 mm with 0.4 mm pitch and in QFN20 3x3 package 3 x 3 x 0.6 mm with 0.5 mm pitch.

特性 Features

• Supply range from 2.6 V to 5 V
• 12 channels for single LED
• 20 mA current capability per channel
• 1% (typ.) current matching at 16 mA and 2% (typ.) at 2.5 mA
• 1.8 V compatible I²C control interface
• 8-bit analog dimming individual control
• 12-bit local PWM resolution
• 8 programmable patterns
• Programmable pattern sequence
• Synchronization for multi-device application
• Phase shifting between channels
• Open LED detection
• Overtemperature protection
• 8 configurable I²C slave addresses plus global address
• Fault flag pin

简介

LED1202属于集成电路（IC）的LED驱动器。由制造生产的LED1202LED 驱动器器件属于 LED 驱动器电源管理集成电路 (PMIC) 系列，可通过标称固定电压的电源为负载（通常为发光二极管）提供电流，并且电流可控。它与用于电压调节的类似产品的主要区别在于，这类器件提供较低的反馈电压（以提高系统能效），而且通常可对器件工作点进行外部控制，可在照明应用中用于实现调光功能。