SGM37864数据手册SGMICRO中文资料规格书

描述 Description

The SGM37864 is a dual LED flash driver that is compact and highly customizable. It employs a synchronous Boost converter with a fixed frequency of 2MHz or 4MHz to drive the dual constant current LED sources, each up to 2A. The dual current sources, each with 256 levels, allow for flexible adjustment of the current ratios between LED1 and LED2. The utilization of an adaptive control method ensures that the current sources are regulated and efficiency is maximized. 
The device's features include an I2 C interface for management, hardware flash and torch pins (STROBE and TORCH/TEMP), an NTC thermistor monitor, and a TX interrupt. The LEDs can operate in either flash or torch mode, with independently programmable currents in each output leg. 
The SGM37864 also includes options for 2MHz or 4MHz switching frequency, adjustable current limit, input voltage flash monitor (IVFM) and over-voltage protection (OVP), making it possible to use small, low-profile inductors and 10µF ceramic capacitors. It operates within a temperature range of -40℃ to +85℃.

特性 Features

• Dual Independent Programmable LED Current Source up to 2A
• Flash Mode: 9.45mA to 2A with 256 Levels
• Torch Mode:
2.35mA to 510mA with 256 Levels (ILED_TOR_SEL = 0)
2mA to 360mA with 256 Levels (ILED_TOR_SEL = 1)
• Flash Timeout Ranges: 40ms to 1600ms
• Up to 85% Efficiency in Torch Mode and Flash Mode
• Switching Frequency Options: 2MHz or 4MHz
• Current Limit Options: 3.2A or 3.9A
• I2C Port for Flexible Working Mode Setting and Status Reporting
• Hardware Flash Enable (STROBE)
• Hardware Torch Enable (TORCH/TEMP)
• Remote NTC Monitoring (TORCH/TEMP)
• Synchronization Input for Pulse Events of the RF Power Amplifier (TX)
• Optimized Flash LED Current with Input Voltage Flash Monitor (IVFM)
• Small Solution Size: Less than 16mm2
• Available in a Green WLCSP-1.2×1.6-12B Package

应用 Application

Smart Phones, EPOS
Portable Internet Devices and Accessory
Action Cameras