收藏本站
ISL97671A
VIN = 3V~21V
ISL97671A
1 FAULT
26.5V, 6 x 50mA*
Compensation
The ISL97671A incorporates a transconductance amplifier in its
feedback path to allow the user to optimize boost stability and
transient response. The ISL97671A uses current mode control
architecture, which has a fast current sense loop and a slow
2 VIN
4 VDC
LX 20
OVP 16
voltage feedback loop. The fast current feedback loop does not
require any compensation, but for stable operation, the slow
7 SMBCLK/SCL
6 SMBDAT/SDA
5 PWM
3 EN
17 RSET
8 FPWM
9 AGND
PGND 19
CH0 10
CH1 11
CH2 12
CH3 13
CH4 14
CH5 15
COMP 18
*VIN>12V
voltage loop must be compensated. The compensation is a
series of Rc, Cc1 network from COMP pin to ground, with an
optional Cc2 capacitor connected between the COMP pin and
ground. The Rc sets the high-frequency integrator gain for fast
transient response, and the Cc1 sets the integrator zero to
ensure loop stability. For most applications, the component
values in Figure 40 can be used: Rc is 10k ? and Cc1 is 3.3nF.
Depending upon the PCB layout, for stability, a Cc2 of 390pF may
be needed to create a pole to cancel the output capacitor ESR’s
zero effect.
FIGURE 38. SINGLE SUPPLY 3V OPERATION
Rc 10k
COMP
VIN = 2.7~26.5V
Q1 (OPTIONAL)
45V, 6 x 50mA*
Cc1
3.3nF
Cc2
390pF
ISL97671A
1 FAULT
VBIAS = 5V~12V
2 VIN
LX 20
OVP 16
FIGURE 40. COMPENSATION CIRCUIT
4 VDC
PGND 19
7 SMBCLK/SCL
6 SMBDAT/SDA
5 PWM
3 EN
17 RSET
8 FPWM
CH0 10
CH1 11
CH2 12
CH3 13
CH4 14
CH5 15
9 AGND
COMP 18
*VIN > 12V
FIGURE 39. DUAL SUPPLIES 2.7V OPERATION
16-Bit Dimming
The SMBus/I 2 C controlled PWM and DC dimmings can be
combined to effectively provide 16 bits of dimming capability,
which can be valuable for automotive and avionics display
applications.
Field Sequential RGB LED Backlighting
The ISL97671A allows to turn each channel ON and OFF
independently. In field sequential RGB LED application, it is
possible to have different DC current and PWM duty cycle for
different channels as long as only one channel is active at a time.
This is achieved by continuously setting a new DC current and/or
PWM duty cycle each time a channel is turned ON. ISL97671A
does not allow to have different DC currents or PWM duty cycles
for channels that are ON at the same time.
26
FN7709.3
November 30, 2012
发布紧急采购，3分钟左右您将得到回复。

采购需求

(若只采购一条型号，填写一行即可)

发布成功！您可以继续发布采购。也可以进入我的后台，查看报价

发布成功！您可以继续发布采购。也可以进入我的后台，查看报价

*型号 *数量 厂商 批号 封装
添加更多采购

我的联系方式

*
*
*
相关PDF资料
ISL97672AIRZ IC LED DRVR LOW DIMMING 20QFN
ISL97672BIRZ IC LED DRVR BACKLIGHT 20QFN
ISL97675IRZ-TK IC LED DVR PWM CTRL 4CH 20QFN
ISL97677IRZ IC LED DVR PWM CTRL 8CH 32QFN
ISL97678IRZ IC LED DVR PWM DIMMING 8CH 32QFN
ISL97686IRTZ IC LED DRVR BACKLIGHT 28TQFN
ISL97691IRTZ-TK IC LED DRVR BACKLIGHT 3D 16TQFN
ISL97693IRTZ-TK IC LED DRVR BACKLIGHT 16TQFN
相关代理商/技术参数
ISL97671AIRZ-T 功能描述:IC LED DRVR 6-CH BACKLIGHT 20QFN RoHS:是 类别:集成电路 (IC) >> PMIC - LED 驱动器 系列:- 标准包装:60 系列:- 恒定电流:- 恒定电压:- 拓扑:线性（LDO），PWM，升压（升压） 输出数:8 内部驱动器:是 类型 - 主要:背光 类型 - 次要:RGB，白色 LED 频率:500kHz ~ 1.5MHz 电源电压:4.75 V ~ 26 V 输出电压:45V 安装类型:* 封装/外壳:* 供应商设备封装:* 包装:* 工作温度:-40°C ~ 85°C
ISL97671AIRZ-TK 功能描述:IC LED DVR PWM CTRL 6CH 20QFN RoHS:是 类别:集成电路 (IC) >> PMIC - LED 驱动器 系列:- 标准包装:60 系列:- 恒定电流:- 恒定电压:- 拓扑:线性（LDO），PWM，升压（升压） 输出数:8 内部驱动器:是 类型 - 主要:背光 类型 - 次要:RGB，白色 LED 频率:500kHz ~ 1.5MHz 电源电压:4.75 V ~ 26 V 输出电压:45V 安装类型:* 封装/外壳:* 供应商设备封装:* 包装:* 工作温度:-40°C ~ 85°C
ISL97671IRZ 制造商:Intersil Corporation 功能描述:6-CH LED DRIVER WITH I2C CONTROL - Rail/Tube
ISL97671IRZ-EVALZ 功能描述:BOARD EVALUATION FOR ISL97671 RoHS:是 类别:编程器，开发系统 >> 评估板 - LED 驱动器 系列:- 标准包装:1 系列:PowerWise® 电流 - 输出 / 通道:20mA 输出及类型:1，非隔离 输出电压:17V 特点:可调光 输入电压:2.7 ~ 5.5 V 已供物品:板 已用 IC / 零件:LM3508 相关产品:LM3508TLX-ND - IC LED DRVR WHT BCKLGT 9USMDLM3508TLDKR-ND - IC LED DRVR WHT BCKLGT 9MICROSMDLM3508TLCT-ND - IC LED DRVR WHT BCKLGT 9MICROSMDLM3508TLTR-ND - IC LED DRVR WHT BCKLGT 9MICROSMD
ISL97671IRZ-T 制造商:Intersil Corporation 功能描述:6-CH LED DRIVER WITH I2C CONTROL - Tape and Reel
ISL97671IRZ-TK 制造商:Intersil Corporation 功能描述:6-CH LED DRIVER WITH I2C CONTROL, 1K T&R - Tape and Reel
ISL97672AIRZ 功能描述:IC LED DRVR LOW DIMMING 20QFN RoHS:是 类别:集成电路 (IC) >> PMIC - LED 驱动器 系列:- 产品培训模块:Lead (SnPb) Finish for COTS Obsolescence Mitigation Program 标准包装:2,500 系列:- 恒定电流:- 恒定电压:- 拓扑:升压（升压），切换式电容器（充电泵） 输出数:1 内部驱动器:是 类型 - 主要:背光 类型 - 次要:白色 LED 频率:625kHz ~ 875kHz 电源电压:2.7 V ~ 5.3 V 输出电压:5V 安装类型:表面贴装 封装/外壳:10-TFSOP，10-MSOP（0.118"，3.00mm 宽） 供应商设备封装:10-µMAX 包装:带卷 (TR) 工作温度:-40°C ~ 85°C
ISL97672AIRZ-T 功能描述:IC LED DRVR LOW DIMMING 20QFN RoHS:是 类别:集成电路 (IC) >> PMIC - LED 驱动器 系列:- 产品培训模块:Lead (SnPb) Finish for COTS Obsolescence Mitigation Program 标准包装:2,500 系列:- 恒定电流:- 恒定电压:- 拓扑:升压（升压），切换式电容器（充电泵） 输出数:1 内部驱动器:是 类型 - 主要:背光 类型 - 次要:白色 LED 频率:625kHz ~ 875kHz 电源电压:2.7 V ~ 5.3 V 输出电压:5V 安装类型:表面贴装 封装/外壳:10-TFSOP，10-MSOP（0.118"，3.00mm 宽） 供应商设备封装:10-µMAX 包装:带卷 (TR) 工作温度:-40°C ~ 85°C