ISL97671A

6-Channel SMBus/I<sup>2</sup>C or PWM Dimming LED Driver with Phase Shift Control

OVERVIEW

The ISL97671A is a 6-Channel 45V dual dimming capable LED driver that can be used with either SMBus/I2 C or PWM signal for dimming control. The ISL97671A can drive six channels of LEDs from an input of 4.5V~26.5V to an output of up to 45V. It can also operate from an input as low as 3V to an output of up to 26.5V in bootstrap configuration.

The ISL97671A features optional channel phase shift control to minimize the input/output ripple characteristics, and load transients to improve efficiency and eliminate audible noise.

The device can also be configured for Direct PWM Dimming with a minimum dimming duty cycle of 0.007% at 200Hz.

The ISL97671A headroom control circuit monitors the highest LED forward voltage string for output regulation, to minimize the voltage headroom and power loss in a typical multi-string operation.

The ISL97671A is offered in a compact and thermally efficient 20 Ld QFN 4mmx3mm package.

KEY FEATURES

  • 6 x 50mA channels
  • 4.5V to 26.5V input with 45V maximum output
  • 3V to 21V input with 26.5V maximum output
  • PWM dimming with phase shift control
  • SMBus/I2C controlled PWM or DC dimming
  • Direct PWM dimming
  • PWM dimming linearity
  • PWM dimming with adjustable dimming frequency and duty cycle linear from 0.4% to 100% <30kHz
  • Direct PWM dimming duty cycle linear from 0.007% to 100% at 200Hz
  • Current matching ±0.7%
  • 600kHz/1.2MHz selectable switching frequency
  • Dynamic headroom control
  • Fault protection
  • String open/short-circuit, OVP, OTP, and optional output short-circuit fault protection
  • 20 Ld 4mmx3mm QFN package

BLOCK DIAGRAM

 Block Diagram

PARAMETRICS

Parameters
ISL97671A
Basic Information
生产状态
Mass Production
器件/通道数量
6
DC/DC照明总电流 (mA)
300
输出电流最大值/通道 (mA)
50
输出电压最大值 (V)
45
亮度控制
SMBus, PWM or DC
总线/输出接口
SMBus/I2C
输入电压最大值 (V)
26.5
输入电压最小值 (V)
4.5
LCD背光尺寸 (最小值) (英寸)
0
LCD背光尺寸 (最大值) (英寸)
17
资质级别
Standard
峰值效率 (%)
92.9
LED数量 (最大值)
78
频率
0.6/1.2 MHz
IS (最大值)
5 mA
IQ (最大值)
5 µA
ISW (典型值) (mA)
2000
集成二极管
No
过压保护
Yes
故障开关
Yes
拓扑
Inductor Boost
输入电压范围 (V)
4.5 to 26.5
LCD背光尺寸
up to 17
CAN 采样
YES
温度范围
-40 to +85

Confirm below disclaimers

Input Renesas account name and password