- 您现在的位置：买卖IC网 > PDF目录20741 > MAX6946ATE+T (Maxim Integrated)IC LED DRIVER LINEAR 16-TQFN PDF资料下载
参数资料
| 型号： | MAX6946ATE+T |
| 厂商： | Maxim Integrated |
| 文件页数： | 13/24页 |
| 文件大小： | 0K |
| 描述： | IC LED DRIVER LINEAR 16-TQFN |
| 产品培训模块： | Lead (SnPb) Finish for COTS Obsolescence Mitigation Program |
| 标准包装： | 2,500 |
| 恒定电流： | 是 |
| 拓扑： | 开路漏极，PWM |
| 输出数： | 10 |
| 内部驱动器： | 是 |
| 类型 - 主要： | 背光 |
| 类型 - 次要： | RGB，白色 LED |
| 频率： | 400kHz |
| 电源电压： | 2.25 V ~ 3.6 V |
| 输出电压： | 7V |
| 安装类型： | 表面贴装 |
| 封装/外壳： | 16-WFQFN 裸露焊盘 |
| 供应商设备封装： | 16-TQFN（3x3） |
| 包装： | 带卷 (TR) |
| 工作温度： | -40°C ~ 125°C |
10-Port, Constant-Current LED Driver and
I/O Expander with PWM Intensity Control
Shutdown Mode
In shutdown mode, all ports configured as constant-
current outputs (output register set to a value between
0x02 and 0xFE) are switched off, and these outputs go
high impedance as if their registers were set to value
0xFF. Ports configured as logic inputs or outputs (out-
put registers set to value 0x00 or 0x01) are unaffected
(Table 4). This means that any ports used for GPIOs
are still fully operational in shutdown mode, and port
inputs can be read and output ports can be toggled at
any time using the serial interface. Use the MAX6946/
MAX6947 for a mix of logic inputs, logic outputs, and
PWM LED drivers, and only the LED drivers turn off
automatically in shutdown.
Put the MAX6946/MAX6947 into shutdown mode by
clearing the run bit (bit D0) in the configuration register
(0x10) (Table 2). Exit shutdown by setting the run bit high
through the serial interface or by using the Reset Run
option (see the Reset Run Option section). Configure
and control the MAX6946/MAX6947 normally through the
serial interface in shutdown mode. All registers are
accessible in shutdown mode, and shutdown mode
Changing a port from static logic-low (0x00) or static
logic-high (0x01) to a constant-current value
(0x02–0xFE) in shutdown mode turns that output off
(logic-high or high impedance) like any other constant-
current outputs in shutdown. The new constant-current
output starts just like any other constant-current outputs
when exiting shutdown.
Changing a port from a constant-current value
(0x02–0xFE) to static logic-low (0x00) or static logic-
high (0x01) in shutdown causes that output to set to the
value as a GPIO output. The new GPIO output is unaf-
fected just like any other GPIO output when exiting
shutdown.
Ramp-Up and Ramp-Down Controls
The MAX6946/MAX6947 provide controls that allow the
output currents to ramp down into shutdown (ramp-
down), and ramp up again out of shutdown (ramp-up)
(Figures 4 and 5). Ramp-down comprises a programma-
ble hold-off delay that also maintains the outputs at full
current for a time before the programmed fade-off time.
After the hold-off delay, the output currents ramp down.
does not change any register values.
ZERO TO 4s CURRENT RAMP-UP AFTER CS RUN
1/8s
1/16s
1/4s 1/2s
1s
2s
4s
FULL CURRENT/
HALF CURRENT
0
EXIT SHUTDOWN COMMAND
Figure 4. Ramp-Up Behavior
ZERO TO 8s CURRENT RAMP-DOWN
FULL CURRENT/
HALF CURRENT
ZERO TO 4s HOLD-OFF DELAY BEFORE FADE-OFF
ZERO TO 4s CURRENT FADE-OFF AFTER HOLD-OFF DELAY
0
1/4s 1/2s
1s
2s
4s 1/4s 1/2s
1s
2s
4s
1/8s
1/16s
Figure 5. Ramp-Down, Hold-Off, and Fade-Off Behavior
1/8s
1/16s
______________________________________________________________________________________
13
相关PDF资料 |
PDF描述 |
|---|---|
| MAX6966ATE+T | IC LED DRIVER LINEAR 16-TQFN |
| NCV86602DT50RKG | IC REG LDO 5V .15A DPAK-5 |
| HMM43DSUH | CONN EDGECARD 86POS .156 DIP SLD |
| MRA4003T3G | DIODE STD REC 1A 300V SMA |
| NCV8518APWR2G | IC REG LDO 5V .25A 16-SOIC |
相关代理商/技术参数 |
参数描述 |
|---|---|
| MAX6946CAWE+ | 制造商:Maxim Integrated Products 功能描述:- Rail/Tube |
| MAX6946CAWE+T | 功能描述:LED照明驱动器 10-Port Constant Current LED Driver RoHS:否 制造商:STMicroelectronics 输入电压:11.5 V to 23 V 工作频率: 最大电源电流:1.7 mA 输出电流: 最大工作温度: 安装风格:SMD/SMT 封装 / 箱体:SO-16N |
| MAX6946EVCMAXQU+ | 功能描述:LED 照明开发工具 MAX6946 Evaluation Kit/Evaluation System RoHS:否 制造商:Fairchild Semiconductor 产品:Evaluation Kits 用于:FL7732 核心: 电源电压:120V 系列: 封装: |
| MAX6946EVKIT | 功能描述:LED 照明开发工具 10-Port Constant-Current LED Driver and I/O Expander with PWM Intensity Control RoHS:否 制造商:Fairchild Semiconductor 产品:Evaluation Kits 用于:FL7732 核心: 电源电压:120V 系列: 封装: |
| MAX6946EVKIT+ | 功能描述:LED 照明开发工具 MAX6946 Evaluation Kit/Evaluation System RoHS:否 制造商:Fairchild Semiconductor 产品:Evaluation Kits 用于:FL7732 核心: 电源电压:120V 系列: 封装: |
发布紧急采购，3分钟左右您将得到回复。