- 您现在的位置：买卖IC网 > PDF目录20740 > MAX6946CAWE+T (Maxim Integrated)IC LED DRIVER LINEAR 16-WLP PDF资料下载
参数资料
| 型号： | MAX6946CAWE+T |
| 厂商： | Maxim Integrated |
| 文件页数： | 12/24页 |
| 文件大小： | 0K |
| 描述： | IC LED DRIVER LINEAR 16-WLP |
| 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-WLP |
| 供应商设备封装： | 16-WLP（2x2） |
| 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
Ports Configured as Inputs
Configure a port as a logic input by writing 0x01 to the
port’s output register (Table 4). Reading an input port
register returns the logic levels from the I/O ports con-
figured as a logic input (Table 7). The input port regis-
ter returns logic 0 in the appropriate bit position for a
port not configured as a logic input.
The input port’s registers are read only. The MAX6946/
MAX6947 ignore a write to input ports register.
RST Input
The active-low RST input operates as a reset that voids
any current I 2 C transaction involving the MAX6946/
MAX6947, forcing the devices into the I 2 C stop condi-
tion. Use the D6 bit in the configuration register to con-
figure RST to reset all the internal registers to the
power-on reset state (Tables 2 and 3). The RST input is
overvoltage tolerant to 6V.
The MAX6946/MAX6947 ignore all I 2 C bus activity while
RST remains low. The MAX6946/MAX6947 use this fea-
ture to minimize supply current in power-critical applica-
tions by effectively disconnecting the MAX6946/
MAX6947 from the bus during idle periods. RST also
operates as a bus multiplexer, allowing multiple
MAX6946/MAX6947s to use the same I 2 C slave address.
Drive only one MAX6946/MAX6947 RST input high at any
time to use RST as a bus multiplexer.
The MAX6946/MAX6947 feature a Reset Run option so
that simply taking the RST input high brings the driver
out of shutdown in addition to its normal function of
enabling the devices’ I 2 C interface.
Standby Mode and Operating Current
Configuring all the ports as logic inputs or outputs (all
output registers set to value 0x00 or 0x01) or LED off
(output register set to value 0xFF) puts the MAX6946/
MAX6947 into standby mode. Put the MAX6946/
MAX6947 into standby mode for lowest supply-current
consumption.
Setting a port as a constant-current output increases
the operating current (output register set to a value
between 0x02 and 0xFE), even if a load is not applied
to the port. The MAX6946/MAX6947 enable an internal
current mirror to provide the accurate constant-current
sink. Enabling the internal current mirror increases the
devices’ supply current. Each output contains a gated
mirror, and each mirror is only enabled when required.
In PWM mode, the current mirror is only turned on for
the output’s on-time. This means that the operating cur-
rent varies as constant-current outputs are turned on
and off through the serial interface, as well as by the
PWM intensity control.
7.8125ms NOMINAL PWM PERIOD
NEXT PWM PERIOD
NEXT PWM PERIOD
0
32
64
96
128
160
192
224
256
OUTPUTS P0, O8 IN-PHASE PWM PERIOD
OUTPUT P1, O9 STAGGERED PWM PERIOD
OUTPUTS P0, O8 IN-PHASE PWM PERIOD
OUTPUT P1, O9 STAGGERED PWM PERIOD
OUTPUTS P0, O8 IN-PHASE PWM PERIOD
OUTPUT P1, O9 STAGGERED PWM PERIOD
OUTPUT P2 STAGGERED PWM PERIOD OUTPUT P2 STAGGERED PWM PERIOD
OUTPUT P3 STAGGERED PWM PERIOD
OUTPUT P4 STAGGERED PWM PERIOD
OUTPUT P5 STAGGERED PWM PERIOD
OUTPUT P3 STAGGERED PWM PERIOD
OUTPUT P4 STAGGERED PWM PERIOD
OUTPUT P5 STAGGERED PWM PERIOD
OUTPUT P6 STAGGERED PWM PERIOD
OUTPUT P7 STAGGERED PWM PERIOD
Figure 3. Staggered PWM Waveform
Table 7. Input Ports Registers
OUTPUT P6 STAGGERED PWM PERIOD
OUTPUT P7 STAGGERED PWM PERIOD
DESCRIPTION
ADDRESS
CODE (HEX)
D7
D6
D5
REGISTER BIT
D4 D3
D2
D1
D0
Input ports
P7–P0
Input ports
P9 and P8
0x0E
0x0F
Port P7
0
Port P6
0
Port P5
0
Port P4
0
Port P3
0
Port P2
0
Port P1
Port P9
Port P0
Port P8
12
______________________________________________________________________________________
相关PDF资料 |
PDF描述 |
|---|---|
| RS3B-13 | RECT FAST RECOVERY 100V 3A SMC |
| GBM25DCMN | CONN EDGECARD 50POS .156 WW |
| CWR09FC225KB | CAP TANT 2.2UF 10V 10% 1505 |
| GBM25DCMH | CONN EDGECARD 50POS .156 WW |
| TPSV477K006R0100 | CAP TANT 470UF 6.3V 10% 2924 |
相关代理商/技术参数 |
参数描述 |
|---|---|
| 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: |
| MAX6947ATE+ | 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 |
| MAX6947ATE+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 |
发布紧急采购，3分钟左右您将得到回复。