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参数资料
| 型号： | MAX6967AEE+ |
| 厂商： | Maxim Integrated |
| 文件页数： | 9/29页 |
| 文件大小： | 0K |
| 描述： | IC LED DRIVER LINEAR 16-QSOP |
| 产品培训模块： | Lead (SnPb) Finish for COTS Obsolescence Mitigation Program |
| 标准包装： | 100 |
| 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： | 270kHz ~ 450kHz |
| 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-SSOP（0.154"，3.90mm 宽） |
| 供应商设备封装： | 16-QSOP |
| 包装： | 管件 |
| 工作温度： | -40°C ~ 125°C |
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MAX6966/MAX6967
10-Port Constant-Current LED Drivers and I/O
Expanders with PWM Intensity Control
If a port is changed from static logic low (0x00) or static
logic high (0x01) to a constant-current value
(0x02 –0xFE) in shutdown mode, then that output is
automatically turned off (logic high, or high impedance)
like any other constant-current outputs that are dis-
abled in shutdown. When shutdown mode is exited, the
new constant-current output starts just like any other
constant-current outputs.
If a port is changed from a constant-current value
(0x02–0xFE) to static logic low (0x00) or static logic
high (0x01) in shutdown mode, then that output is
instantly set to that value as a GPIO output. When shut-
down mode is exited, the new GPIO output is unaffect-
ed just like any other GPIO outputs.
CS Run Option
The MAX6966/MAX6967 can be configured so that a
relatively long pulse on the CS input brings the driver
out of shutdown, as an alternative method to the normal
method of writing the configuration register through the
serial interface. When the CS run option is enabled, a
minimum pulse on CS sets the run bit in the configura-
tion register, bringing the driver out of shutdown and
activating any preconfigured ramp-up. Also, the SPI
interface must be operated at a minimum data rate to
ensure that a normal active-low CS pulse during a 16-
bit regular data transmission is not mistaken for a CS
run command.
The CS run timing uses the PWM clock, which is either
the internal nominal 32kHz oscillator or a user-provided
clock fed into the dual-use DOUT/OSC pin (see the PWM
Clock section for details on configuring the PWM clock).
The minimum pulse on CS to trigger CS run and bring
the driver out of shutdown is 256 to 257 periods of the
PWM clock. For the internal oscillator, this time is 257 /
27000 = 9.52ms. For the external PWM clock, this time
is 257 / OSC and has a shortest possible time of
2.57ms when OSC is set to the maximum allowed
100kHz frequency.
Maxim Integrated
The maximum pulse on CS to ensure that CS run is not
triggered (when enabled) is 255 periods of the PWM
clock. For the internal oscillator, this time is 255 / 45000
= 5.66ms. Since a transmission on the serial interface
comprises 16 clocks with CS low, a minimum 2.83kHz
SCLK frequency ensures that CS run is not triggered.
For the external PWM clock, this time is 255 / OSC and
has a shortest time of 2.55ms when OSC is set to the
maximum allowed frequency of 100kHz.
The SPI serial interface circuitry is independent of the
CS run circuitry. Activity on SCLK and DIN is ignored
by the CS run circuitry. A slow SPI transmission to the
MAX6966/MAX6967 can therefore be used as both a
valid data transmission (read or write), and as a means
for exiting shutdown. The CS run action (i.e., setting the
run bit in the configuration register) occurs before any
coincident data transmission is processed. This means
that a slow transmission containing a write command to
the configuration register clearing the run bit would
work, since the write command is implemented internal-
ly after the CS run action that sets the run bit.
The "slow transmission" cut-off data rate is expected to
be lower than the SPI interface speed in the majority of
applications. If this is not the case, the CS run option
can still be used. Consider the situation when the
MAX6966/MAX6967 have been put into shutdown with
the CS run option enabled. The application uses the
MAX6966/MAX6967 with some ports configured as
logic inputs or outputs, which need to be accessed in
shutdown. The SPI interface speed is slow, so any
transmission brings the MAX6966/MAX6967 out of shut-
down. So, how are the I/O ports accessed in shut-
down? The solution is to write the configuration register
disabling CS run (bit D1 = 0) and invoking shutdown
(bit D0 = 0) as the first command. Now any other regis-
ters can be accessed while the MAX6966/MAX6967
remain in shutdown. Finally, write the configuration reg-
ister reenabling CS run (bit D1 = 1) and invoking shut-
down (bit D0 = 0) to restore the original status.
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相关代理商/技术参数 |
参数描述 |
|---|---|
| MAX6967AEE+ | 功能描述:LED显示驱动器 10-Port Constant Current LED Driver RoHS:否 制造商:Micrel 数位数量:5 片段数量: 安装风格:SMD/SMT 封装 / 箱体:PLCC-44 工作电源电压:4.75 V to 11 V 最大电源电流:10 mA 最大工作温度:+ 85 C 最小工作温度:- 40 C 封装:Tube |
| MAX6967AEE+T | 功能描述:LED显示驱动器 10-Port Constant Current LED Driver RoHS:否 制造商:Micrel 数位数量:5 片段数量: 安装风格:SMD/SMT 封装 / 箱体:PLCC-44 工作电源电压:4.75 V to 11 V 最大电源电流:10 mA 最大工作温度:+ 85 C 最小工作温度:- 40 C 封装:Tube |
| MAX6967AEE-T | 功能描述:LED显示驱动器 10-Port Constant Current LED Driver RoHS:否 制造商:Micrel 数位数量:5 片段数量: 安装风格:SMD/SMT 封装 / 箱体:PLCC-44 工作电源电压:4.75 V to 11 V 最大电源电流:10 mA 最大工作温度:+ 85 C 最小工作温度:- 40 C 封装:Tube |
| MAX6967ATE | 功能描述:LED显示驱动器 10-Port Constant Current LED Driver RoHS:否 制造商:Micrel 数位数量:5 片段数量: 安装风格:SMD/SMT 封装 / 箱体:PLCC-44 工作电源电压:4.75 V to 11 V 最大电源电流:10 mA 最大工作温度:+ 85 C 最小工作温度:- 40 C 封装:Tube |
| MAX6967ATE+ | 功能描述:LED显示驱动器 10-Port Constant Current LED Driver RoHS:否 制造商:Micrel 数位数量:5 片段数量: 安装风格:SMD/SMT 封装 / 箱体:PLCC-44 工作电源电压:4.75 V to 11 V 最大电源电流:10 mA 最大工作温度:+ 85 C 最小工作温度:- 40 C 封装:Tube |
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