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参数资料
| 型号： | MAX6968AUE+T |
| 厂商： | Maxim Integrated |
| 文件页数： | 7/13页 |
| 文件大小： | 0K |
| 描述： | IC LED DRIVER LINEAR 16-TSSOP |
| 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： | 线性，高端 |
| 输出数： | 8 |
| 内部驱动器： | 是 |
| 类型 - 主要： | LED 照明显示器，标牌，汽车 |
| 电源电压： | 3 V ~ 5.5 V |
| 输出电压： | 5.5V |
| 安装类型： | 表面贴装 |
| 封装/外壳： | 16-TSSOP（0.173"，4.40mm）裸露焊盘 |
| 供应商设备封装： | 16-TSSOP-EP |
| 包装： | 带卷 (TR) |
| 工作温度： | -40°C ~ 125°C |
8-Port, 5.5V Constant-Current LED Driver
Detailed Description
The MAX6968 LED driver comprises a 4-wire serial
interface driving eight constant-current sinking open-
drain output ports. The outputs drive LEDs in either
static or multiplex applications (Figure 1). The constant-
current outputs are guaranteed for current accuracy
not only with chip-supply voltage variations (5V ±10%
and 3V to 5.5V), but also over a realistic range of driver
output voltage drop (0.5V to 2.5V). The drivers use cur-
rent-sensing feedback circuitry (not simple current mir-
rors) to ensure very small current variations over the full
allowed range of output voltage (see the Typical
Operating Characteristics ).
The 4-wire serial interface comprises an 8-bit shift reg-
ister and an 8-bit transparent latch. The shift register is
written through a clock input CLK and a data input DIN
and the data propagates to a data output DOUT. The
data output allows multiple drivers to be cascaded and
operated together. The contents of the 8-bit shift regis-
ter are loaded into the transparent latch through a latch
enable input LE. The latch is transparent to the shift
register outputs when high, and latches the current
state on the falling edge of LE.
Each driver output is an open-drain constant-current
sink that should be connected to the cathode of either
a single LED or a series string of multiple LEDs. The
LED anode can be connected to a supply voltage of up
to 5.5V, independent of the MAX6968 supply, V+. The
constant-current capability is up to 55mA per output,
set for all eight outputs by an external resistor, R SET .
Initial Power-Up and Operation
An internal reset circuit clears the internal registers of
the MAX6968 on power-up. All outputs OUT0 – OUT7,
therefore, initialize high impedance, and the interface
output DOUT initializes low, regardless of the initial
logic levels of the CLK, DIN, OE , and LE inputs.
4-Wire Serial Interface
The serial interface on the MAX6968 is a 4-wire serial
interface using four inputs (DIN, CLK, LE, OE ) and a
data output (DOUT). This interface is used to write dis-
play data to the MAX6968. The serial-interface data
word length is 8 bits, D0 – D7. See Figure 2.
The functions of the five interface pins are as follows.
DIN is the serial data input, and must be stable when it
is sampled on the rising edge of CLK. Data is shifted in,
MSB first. This means that data bit D7 is clocked in first,
followed by 7 more data bits finishing with the LSB D0.
LE
t CL
t CH
t CP
t LS
t LW
t LF
CLK
t DH
t DS
DIN
D7
D6
D1
D0
t DO
DOUT
OE
t OEL
t OEW
t OEH
D7
80%
.
OUT_
Figure 2. 4-Wire Serial-Interface Timing Diagram
t f
20%
t r
_______________________________________________________________________________________
7
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相关代理商/技术参数 |
参数描述 |
|---|---|
| MAX6969ANG | 功能描述:LED显示驱动器 RoHS:否 制造商:Micrel 数位数量:5 片段数量: 安装风格:SMD/SMT 封装 / 箱体:PLCC-44 工作电源电压:4.75 V to 11 V 最大电源电流:10 mA 最大工作温度:+ 85 C 最小工作温度:- 40 C 封装:Tube |
| MAX6969ANG+ | 功能描述:LED显示驱动器 16-Port 5.5V Const Current LED Driver RoHS:否 制造商:Micrel 数位数量:5 片段数量: 安装风格:SMD/SMT 封装 / 箱体:PLCC-44 工作电源电压:4.75 V to 11 V 最大电源电流:10 mA 最大工作温度:+ 85 C 最小工作温度:- 40 C 封装:Tube |
| MAX6969APG | 制造商:Maxim Integrated Products 功能描述:- Rail/Tube |
| MAX6969APG+ | 制造商:Maxim Integrated Products 功能描述:- Rail/Tube |
| MAX6969AUG | 功能描述:LED显示驱动器 16-Port 5.5V Const Current LED Driver RoHS:否 制造商:Micrel 数位数量:5 片段数量: 安装风格:SMD/SMT 封装 / 箱体:PLCC-44 工作电源电压:4.75 V to 11 V 最大电源电流:10 mA 最大工作温度:+ 85 C 最小工作温度:- 40 C 封装:Tube |
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