参数资料
| 型号： | MAX8759ETI+T |
| 厂商： | Maxim Integrated |
| 文件页数： | 20/32页 |
| 文件大小： | 0K |
| 描述： | IC CNTRL CCFL BACKLIGHT 28TQFN |
| 产品培训模块： | Lead (SnPb) Finish for COTS Obsolescence Mitigation Program |
| 标准包装： | 2,500 |
| 类型： | CCFL 控制器 |
| 频率： | 30 ~ 80 kHz |
| 电流 - 电源： | 2.5mA |
| 电源电压： | 4.5 V ~ 28 V |
| 工作温度： | -40°C ~ 85°C |
| 封装/外壳： | 28-WFQFN 裸露焊盘 |
| 供应商设备封装： | 28-TQFN-EP（5x5） |
| 包装： | 带卷 (TR) |
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Low-Cost, SMBus, CCFL Backlight Controller
WRITE-BYTE FORMAT
S
—
ADDRESS
7 BITS
WR
1b
ACK
1b
COMMAND
8 BITS
ACK
1b
DATA
8 BITS
ACK
1b
P
—
SLAVE ADDRESS
READ-BYTE FORMAT
COMMAND BYTE: SELECTS
WHICH REGISTER YOU ARE
WRITING TO
DATA BYTE: DATA GOES INTO THE
REGISTER SET BY THE COMMAND BYTE
S
—
ADDRESS
7 BITS
WR
1b
ACK
1b
COMMAND
8 BITS
ACK
1b
S
—
ADDRESS
7 BITS
RD
1b
ACK
1b
DATA
8 BITS
///
1b
P
—
SLAVE ADDRESS
COMMAND BYTE: SELECTS
SLAVE ADDRESS: REPEATED DATA BYTE: READS FROM THE
SEND-BYTE FORMAT
WHICH REGISTER YOU ARE
READING FROM
DUE TO CHANGE IN DATA-
FLOW DIRECTION
RECEIVE-BYTE FORMAT
REGISTER SET BY THE COMMAND
BYTE
S
—
ADDRESS
7 BITS
WR
1b
ACK
1b
COMMAND
8 BITS
ACK
1b
P
—
S
—
ADDRESS
7 BITS
RD
1b
ACK
1b
DATA
8 BITS
///
1b
P
—
COMMAND BYTE: SENDS COM-
MAND WITH NO DATA; USUALLY
USED FOR ONE-SHOT COMMAND
SLAVE ADDRESS
DATA BYTE: READS DATA FROM THE
REGISTER COMMANDED BY THE
LAST READ-BYTE OR WRITE-BYTE
TRANSMISSION; ALSO USED FOR
SMBus ALERT RESPONSE RETURN
ADDRESS
S = START CONDITION
P = STOP CONDITION
SHADED = SLAVE TRANSMISSION
ACK = ACKNOWLEDGED = 0
WR = WRITE = 0
RD = READ = 1
/// = NOT ACKNOWLEDGED = 1
Figure 8. SMBus Protocols
values. POR occurs when V CC rises above 1.75V (typ).
The UVLO occurs when V CC is below 4.2V (typ). The
MAX8759 disables both high-side and low-side switch
drivers below the UVLO threshold.
Low-Power Shutdown
The MAX8759 is placed into shutdown by clearing bit 0
of the device control register (0x01).When the
MAX8759 is shut down, all functions of the IC are
turned off except the 5.35V linear regulator. In shut-
down, the linear regulator output voltage drops to 4.5V
and the supply current is 6μA (typ). While in shutdown,
the fault latch is reset. The device can be reenabled by
setting bit 0 of the device control register to 1.
Ambient-Light-Sensor Supply Pin (VALS)
The MAX8759 provides the supply voltage of the ALS
through the VALS pin. VALS is internally connected to
the 5.35V linear regulator output through a p-channel
MOSFET. The p-channel MOSFET is turned on when the
MAX8759 is enabled and turned off when the part is dis-
abled. Bypass VALS to ground with a minimum 0.1μF
ceramic capacitor. Place the capacitor as close to the
ALS supply input as possible.
SMBus Interface (SDA, SCL)
The MAX8759 supports an SMBus-compatible 2-wire
digital interface. SDA is the bidirectional data line and
SCL is the clock line of the 2-wire interface correspond-
ing respectively to SMBDATA and SMBCLK lines of the
SMBus. SDA and SCL have Schmidt-triggered inputs
that can accommodate slow edges; however, the rising
and falling edges should still be faster than 1μs and
300ns, respectively. The MAX8759 uses the write-byte
and read-byte protocols (Figure 8). The SMBus proto-
cols are documented in System Management Bus
Specification V1.08 and are available at
http://www.sbs-forum.org/.
The MAX8759 is a slave-only device and responds to
the 7-bit address 0b0101100. The read and write com-
mands can be distinguished by adding ONE more bit
(R/ W bit) to the end of the 7-bit slave address, with one
indicating read and zero indicating write. The MAX8759
has seven registers: a brightness control register
(0x00), a device control register (0x01), a fault/status
register (0x02), an identification register (0x03), an ALS
status register (0x04), an ALS low-limit register (0x05),
20
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相关代理商/技术参数 |
参数描述 |
|---|---|
| MAX8759EVKIT | 功能描述:显示开发工具 MAX8759 Eval Kit RoHS:否 制造商:4D Systems 产品:4Display Shields 工具用于评估:?OLED-160-G1, ?OLED-160-G2 接口类型:Serial 工作电源电压:5 V |
| MAX875ACPA | 制造商:Rochester Electronics LLC 功能描述: |
| MAX875ACPA+ | 功能描述:基准电压& 基准电流 2.5/5/10V Precision Voltage Reference RoHS:否 制造商:STMicroelectronics 产品:Voltage References 拓扑结构:Shunt References 参考类型:Programmable 输出电压:1.24 V to 18 V 初始准确度:0.25 % 平均温度系数（典型值）:100 PPM / C 串联 VREF - 输入电压（最大值）: 串联 VREF - 输入电压（最小值）: 分流电流（最大值）:60 mA 最大工作温度:+ 125 C 封装 / 箱体:SOT-23-3L 封装:Reel |
| MAX875ACSA | 制造商:Maxim Integrated Products 功能描述:- Bulk |
| MAX875ACSA+ | 功能描述:基准电压& 基准电流 2.5/5/10V Precision Voltage Reference RoHS:否 制造商:STMicroelectronics 产品:Voltage References 拓扑结构:Shunt References 参考类型:Programmable 输出电压:1.24 V to 18 V 初始准确度:0.25 % 平均温度系数（典型值）:100 PPM / C 串联 VREF - 输入电压（最大值）: 串联 VREF - 输入电压（最小值）: 分流电流（最大值）:60 mA 最大工作温度:+ 125 C 封装 / 箱体:SOT-23-3L 封装:Reel |
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