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参数资料
| 型号： | MAX7307ALB+T |
| 厂商： | Maxim Integrated |
| 文件页数： | 15/23页 |
| 文件大小： | 0K |
| 描述： | IC LED DRIVER LINEAR 10-UDFN |
| 产品培训模块： | Lead (SnPb) Finish for COTS Obsolescence Mitigation Program |
| 标准包装： | 2,500 |
| 拓扑： | PWM |
| 输出数： | 4 |
| 内部驱动器： | 是 |
| 类型 - 主要： | 背光，LED 闪烁器 |
| 类型 - 次要： | 白色 LED |
| 频率： | 1MHz |
| 电源电压： | 1.62 V ~ 3.6 V |
| 安装类型： | 表面贴装 |
| 封装/外壳： | 10-WFDFN |
| 供应商设备封装： | 10-uDFN（2x2） |
| 包装： | 带卷 (TR) |
| 工作温度： | -40°C ~ 125°C |
SMBus/I 2 C Interfaced 4-Port, Level-Translating
GPIOs and LED Drivers
EXTERNAL
OSCILLATOR
0MHz TO 1MHz
P2/OSCIN
MAX7306
P2/OSCIN
MAX7306
P2/OSCIN
MAX7306
EXTERNAL
OSCILLATOR
0MHz TO 1MHz
P2/OSCIN
MAX7306
P3/OSCOUT
P2/OSCIN
MAX7306
P3/OSCOUT
P2/OSCIN
MAX7306
Figure 5. Synchronizing Multiple MAX7306s (External Clock)
PWM and Blink Timing
The MAX7306/MAX7307 divide the 32kHz nominal
internal oscillator OSC or external clock source OSCIN
frequency by 32 to provide a nominal 1kHz PWM fre-
quency. Use the reset function to synchronize multiple
MAX7306s that are operating from the same OSCIN, or
to synchronize a single MAX7306/MAX7307’s blink tim-
ing to an external event. Configure the RST input to
reset the internal timing counters used by PWM and
blink by setting bit D1 of the device configuration regis-
ter 0x26 (see Table 3).
The MAX7306/MAX7307 use the internal oscillator by
default. Configure port P2 using device configuration
register 0x27 bit D2 (see Table 4) as an external clock
source input, OSCIN, if the application requires a par-
ticular or more accurate timing for the PWM or blink
functions. OSCIN only applies to PWM and blink; the
MAX7306/MAX7307 always use the internal oscillator for
debouncing and bus timeout. OSCIN can range up to
1MHz. Use device configuration register 0x27 bit D3
(see Table 2) to configure port P3 as OSCOUT to out-
put a MAX7306/MAX7307 ’s clock. The MAX7306/
MAX7307 buffer the clock output of either the internal
oscillator OSC or the external clock source OSCIN,
according to port D2 ’s setup. Synchronize multiple
MAX7306s without using an external clock source input
by configuring one MAX7306 to generate OSCOUT
from its internal clock, and use this signal to drive the
remaining MAX7306s’ OSCIN.
A PWM period contains 32 cycles of the nominal 1kHz
PWM clock (see Figure 6). Set ports individually to a
PWM duty cycle between 0/32 and 31/32. For static
logic-level low output, set the ports to 0/32 PWM, and
for static logic-level high output, set the port register to
0111xxxx (see Table 8). The MAX7306/MAX7307 stag-
ger the PWM timing of the 4-port outputs, in single or dual
ports, by 1/8 of the PWM period. These phase shifts dis-
tribute the port-output switching points across the PWM
period (see Figure 7). This staggering reduces the di/dt
output-switching transient on the supply and also
reduces the peak/mean current requirement.
All ports feature LED blink control. A global blink period
of 1/8 second, 1/4 second, 1/2 second, 1, 2, 4, or 8
seconds applies to all ports. See Table 9. Any port can
blink during this period with a 1/16 to 15/16 duty cycle,
adjustable in 1/16 increments. See Table 10. For PWM
fan control, the MAX7306/MAX7307 can set the blink
frequency to 32Hz.
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相关代理商/技术参数 |
参数描述 |
|---|---|
| MAX7307AUB+ | 功能描述:外围驱动器与原件 - PCI 4-Port Level-Trans GPIO & LED Driver RoHS:否 制造商:PLX Technology 工作电源电压: 最大工作温度: 安装风格:SMD/SMT 封装 / 箱体:FCBGA-1156 封装:Tray |
| MAX7307AUB+T | 功能描述:外围驱动器与原件 - PCI 4-Port Level-Trans GPIO & LED Driver RoHS:否 制造商:PLX Technology 工作电源电压: 最大工作温度: 安装风格:SMD/SMT 封装 / 箱体:FCBGA-1156 封装:Tray |
| MAX7307EVKIT+ | 制造商:Maxim Integrated Products 功能描述:MAX7307 EVAL KIT/EVAL SYS - Rail/Tube |
| MAX730A | 制造商:MAXIM 制造商全称:Maxim Integrated Products 功能描述:5V, Step-Down, Current-Mode PWM DC-DC Converters |
| MAX730AC/D | 功能描述:直流/直流开关转换器 DICE SALES DICE RoHS:否 制造商:STMicroelectronics 最大输入电压:4.5 V 开关频率:1.5 MHz 输出电压:4.6 V 输出电流:250 mA 输出端数量:2 最大工作温度:+ 85 C 安装风格:SMD/SMT |
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