10-Port, Constant-Current LED Driver and
I/O Expander with PWM Intensity Control
Typical Operating Characteristics
(T A = +25°C, unless otherwise noted.)
2.0
STANDBY CURRENT (I STBY )
vs. TEMPERATURE
25
SUPPLY CURRENT (I DD )
vs. TEMPERATURE
25
STANDBY CURRENT (I RST )
vs. TEMPERATURE
1.6
20
V DD = 3.6V
V DD = 3.3   V
20
V DD = 3.6V
V DD = 3.3V
V DD = 3.6V
1.2
0.8
V DD = 3.3V
V DD = 2.7V
15
10
V DD = 2.7V
15
10
0.4
V DD = 2.25     V
5
V DD = 2.25     V
5
V DD = 2.7V
V DD = 2.25V
0
-40 -25 -10 5 20 35 50 65 80 95 110 125
0
-40 -25 -10 5 20 35 50 65 80 95 110 125
0
-40 -25 -10 5 20 35 50 65 80 95 110 125
4.0
TEMPERATURE ( ° C)
DELTA SUPPLY CURRENT (I DD20 )
vs. TEMPERATURE
15
TEMPERATURE ( ° C)
DELTA SUPPLY CURRENT (I DD20 )
vs. TEMPERATURE
14
TEMPERATURE ( ° C)
OUTPUT SINKING CURRENT
vs. V EXT - V LED AT 10mA
V DD = 3.6V
12
3.6
3.2
2.8
V DD = 3.6V
V DD = 3.3V
12
9
6
V DD = 3.3V
10
8
6
4
2.4
V DD = 2.25V
V DD = 2.7V
3
V DD = 2.25V
V DD = 2.7V
2
2.0
0
0
-40 -25 -10 5 20 35 50 65 80 95 110 125
-40 -25 -10 5 20 35 50 65 80 95 110 125
0
1
2 3
4
5
TEMPERATURE ( ° C)
24
OUTPUT SINKING CURRENT
vs. V EXT - V LED AT 20mA
TEMPERATURE ( ° C)
STAGGER PWM PORT WAVEFORMS
(OUTPUT REGISTERS SET TO 0x80)
MAX6946/47 toc08
V EXT - V LED (V)
20
PORT P0
16
12
8
4
0
2V/div
PORT P4
2V/div
PORT P7
2V/div
0
1
2 3
4
5
1ms/div
V EXT - V LED (V)
_______________________________________________________________________________________
5
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相关代理商/技术参数
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MAX6948BGWA+T 功能描述:LED照明驱动器 High-Efficiency PWM 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
MAX694C/D 功能描述:监控电路 RoHS:否 制造商:STMicroelectronics 监测电压数: 监测电压: 欠电压阈值: 过电压阈值: 输出类型:Active Low, Open Drain 人工复位:Resettable 监视器:No Watchdog 电池备用开关:No Backup 上电复位延迟(典型值):10 s 电源电压-最大:5.5 V 最大工作温度:+ 85 C 安装风格:SMD/SMT 封装 / 箱体:UDFN-6 封装:Reel
MAX694CPA 功能描述:监控电路 RoHS:否 制造商:STMicroelectronics 监测电压数: 监测电压: 欠电压阈值: 过电压阈值: 输出类型:Active Low, Open Drain 人工复位:Resettable 监视器:No Watchdog 电池备用开关:No Backup 上电复位延迟(典型值):10 s 电源电压-最大:5.5 V 最大工作温度:+ 85 C 安装风格:SMD/SMT 封装 / 箱体:UDFN-6 封装:Reel
MAX694CPA+ 功能描述:监控电路 MPU Supervisor RoHS:否 制造商:STMicroelectronics 监测电压数: 监测电压: 欠电压阈值: 过电压阈值: 输出类型:Active Low, Open Drain 人工复位:Resettable 监视器:No Watchdog 电池备用开关:No Backup 上电复位延迟(典型值):10 s 电源电压-最大:5.5 V 最大工作温度:+ 85 C 安装风格:SMD/SMT 封装 / 箱体:UDFN-6 封装:Reel
MAX694EJA 功能描述:监控电路 RoHS:否 制造商:STMicroelectronics 监测电压数: 监测电压: 欠电压阈值: 过电压阈值: 输出类型:Active Low, Open Drain 人工复位:Resettable 监视器:No Watchdog 电池备用开关:No Backup 上电复位延迟(典型值):10 s 电源电压-最大:5.5 V 最大工作温度:+ 85 C 安装风格:SMD/SMT 封装 / 箱体:UDFN-6 封装:Reel
MAX694EPA 功能描述:监控电路 RoHS:否 制造商:STMicroelectronics 监测电压数: 监测电压: 欠电压阈值: 过电压阈值: 输出类型:Active Low, Open Drain 人工复位:Resettable 监视器:No Watchdog 电池备用开关:No Backup 上电复位延迟(典型值):10 s 电源电压-最大:5.5 V 最大工作温度:+ 85 C 安装风格:SMD/SMT 封装 / 箱体:UDFN-6 封装:Reel
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