IS32LT3138数据手册Lumissil中文资料规格书

描述 Description

The IS32LT3138 is a linear programmable current regulator consisting of 18 output channels capable of up to 100mA each. UART communication interface compatible with CANFD PHY is used for output control by a master microcontroller or ECU. Each output can individually support 4096 steps PWM dimming and 128 steps DC current adjustment. The outputs can be combined to provide higher current drive capability to max 1.8A. For added system reliability, the IS32LT3138 integrates fault detection circuitry for open/short string, single LED short, and over temperature conditions. The fault detail can be got by interfaces. The fault pins (FAULTB) can all be tied together to disable the device and other IS32LT3138 devices on the same parallel circuit. The IS32LT3138 is targeted at the automotive market such as interior accent lighting and exterior tail lighting. It is offered in WFQFN-32 (5mm?mm) package.

特性 Features

• Wide input voltage supply from 4.5V to 16V
• Maximum output voltage16V
• UART Communication Interface ▪ UART interface compatible with CANFD physical layer, 1MHz maximum (32MHz OSC). ▪ UART communication with CRC to ensure robustness of communication ▪ Support up to max. 64 addressable devices ▪ Watch dog timer ▪ Support LIMP mode
• 18 channels capable of 100mA each ▪ ±6% @ 100mA bit-to-bit output current mismatch ▪ ±6% @ 100mA device-to-device output current accuracy
• Combined for higher current capability with same current accuracy▪ Minimum headroom voltage of 0.5V(Max.) at 100mA
• Individual PWM dimming to each channel ▪ 4096 steps (12-bit) PWM duty cycle setting
• 7+5-bit at 24kHz @ 3MHz OSC
• 12-bit at 244Hz @ 1MHz OSC
• 8-bit at 24kHz @ 6MHz OSC ▪ Phase delay minimizes inrush current-1 PWM base cycle (6 groups) ▪ 180-degree phase
• Slew rate control and spread spectrum optimize EMI performance
• 63 steps global current setting
• Individual 128 steps DC current adjustment to each channel
• Spread spectrum
• DC Binning support (ADJR pin)
• Fault protection with reporting ▪ Fail safe modes selection- to MCU ▪ LED string open/short ▪ Single LED short ▪ Programmable fault reporting delay time ▪ Programmable over temperature current roll off ▪ Thermal shutdown
• AEC-Q100 qualification in progress
• Operating temperature range (-40°C ~ +125°C)
• WFQFN-32 (5mm×5mm) package
• RoHS & Halogen-Free Compliance
• TSCA Compliance

应用 Application

• Animation Rear Light
• Animation Tail Light
• Animation Daytime Running Light