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参数资料
| 型号： | MAX6948BGWA+T |
| 厂商： | Maxim Integrated |
| 文件页数： | 14/28页 |
| 文件大小： | 0K |
| 描述： | IC LED DVR PWM GPIO 25WLP |
| 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，升压（升压） |
| 输出数： | 6 |
| 内部驱动器： | 是 |
| 类型 - 主要： | 背光 |
| 类型 - 次要： | 白色 LED |
| 频率： | 2MHz |
| 电源电压： | 2.7 V ~ 5 V |
| 输出电压： | 28V |
| 安装类型： | 表面贴装 |
| 封装/外壳： | 25-WFBGA，WLCSP |
| 供应商设备封装： | 25-WLP（2.09x2.09） |
| 包装： | 带卷 (TR) |
| 工作温度： | -40°C ~ 105°C |
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MAX6948B
High-Efficiency PWM LED Driver with Boost
Converter and Five Constant-Current GPIO Ports
I/O Ports (P0–P4)
The MAX6948B contains five I/O ports (P0–P4). Configure
the five I/O ports as logic inputs, open-drain logic outputs,
or constant-current sinks in any combination. Table 7
provides a detailed description of the individual port con-
figuration registers. Use registers 0x00 to 0x04 to individu-
ally assign each port (see the PWM Intensity Control and
Phasing section). Use registers 0x0A, 0x0B, and 0x0C to
assign the same port setting to multiple ports (Table 1).
When powered off, the I/O ports remain in high impedance.
Figure 1 shows the I/O port structure of the MAX6948B.
I/O ports P0–P4 default to high impedance on power-up,
to prevent connected ports from drawing current. Ports
used as inputs do not load their source signals.
Table 7. Port Registers Format (0x00 to 0x04 , 0x0A, 0x0B, and 0x0C)
REGISTER DESCRIPTION
D7
D6
D5
REGISTER DATA
D4 D3
D2
D1
D0
Port is logic-low. Port is still active in shutdown mode.
Port is logic-high. Set this mode when using GPIO as an input.
Port is still active when in shutdown mode.
Port is a static constant-current sink. Port is high impedance
when in shutdown mode.
Port is a constant-current sink with a 3/256 duty cycle. Port is
high impedance when in shutdown mode.
Port is a constant-current sink with a 4/256 duty cycle. Port is
high impedance when in shutdown mode.
Port is a constant-current sink with a 5/256 duty cycle. Port is
high impedance when in shutdown mode.
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
1
1
0
0
1
1
0
0
0
1
0
1
0
1
U
U
U
Port is a constant-current sink with a 254/256 duty cycle. Port is
high impedance when in shutdown mode.
Power-up default setting (port is high impedance)
1
1
1
1
1
1
1
1
1
1
1
1
1
1
0
1
I/O PORT
8-BIT LATCH
OUTPUT PORT
REGISTER
POSITION A: 0x00 TO 0x01
POSITION B: 0x02 TO 0xFF
CLOSE SWITCH: 0x02 TO 0xFE
PWM
GENERATOR
A
B
TO/FROM
SERIAL
INTERFACE
1-BIT LATCH
OUTPUT-CURRENT
REGISTER
MSB
4-BIT DAC
ENABLE
SET
CURRENT
n-CHANNEL
MOSFET
3-BIT LATCH
GLOBAL-CURRENT
REGISTER
READ I/O
PORT COMMAND
Figure 1. Simplified Schematic of I/O Ports
14
Maxim Integrated
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相关代理商/技术参数 |
参数描述 |
|---|---|
| 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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