- 您现在的位置：买卖IC网 > Datasheet目录996 > NCP5608EVB (ON Semiconductor)EVAL BOARD FOR NCP5608 Datasheet资料下载
参数资料
| 型号： | NCP5608EVB |
| 厂商： | ON Semiconductor |
| 文件页数： | 10/16页 |
| 文件大小： | 0K |
| 描述： | EVAL BOARD FOR NCP5608 |
| 设计资源： | NCP5608EVB BOM NCP5608EVB Gerber Files NCP5608EVB Schematic NCP5608 Demo Brd BOM |
| 标准包装： | 1 |
| 电流 - 输出 / 通道： | 500mA |
| 输出及类型： | 8，非隔离 |
| 输出电压： | 4.8 ~ 5.5 V |
| 特点： | 亮度控制 |
| 输入电压： | 3.6V |
| 已供物品： | 板 |
| 已用 IC / 零件： | NCP5608 |
| 其它名称： | NCP5608EVBOS |
NCP5608
OUTPUT LED PROGRAMMING SEQUENCE
Once the maximum output current has been set up by the
external resistor (see Load Current Calculation paragraph
above), the I2C protocol can be used to dynamically adjust
the brightness of the selected block.
At this point, the dimming of each block depends upon
the content of the appropriate register (PWRLD_BK[4..0]
or PWRLED_FL[6..0]). The LED current can be
calculated according to the digital value stored into the
registers.
The LED can be programmed in four steps:
1. Define the maximum ILEDBK?MAX and
ILEDFL?MAX currents requested by the Back
Light and Flash applications (set by external
resistors). This is the maximum current that will
be reached when the registers will be at their
respective full range (PWRLD_BK[4..0] = $1F =
31 Decimal, PWRLED_FL[6..0] = $7F= 127
decimal).
2. Calculate the reference current (Irefbk and Ireffl ):
Irefbk = ILED?BK/1200 and
Ireffl = ILED?FL/4000
3. Calculate the external resistor value
RBK = 0.6/Irefbk
RFL = 0.6/Ireffl
4. The dimming of flash and backlight LED will be
now achieved by changing the PWRLD_BK[4..0]
and PWRLED_FL[6..0] registers content to get the
operating LED current along the curves 0 mA to
ILED?BK?MAX mA and 0 mA to ILED?FL mA:
BK?NSteps = number of steps stored into the
PWRLD_BK register (value, in decimal, of the
PWRLD_BK[4..0] register)
FL?NSteps = number of steps stored into the
PWRLED_FL register (value, in decimal, of the
PWRLD_FL[6..0] register)
ILEDBK = (ILEDBK?MAX/31) * BK?NSteps
ILEDFL = (ILEDFL?MAX/127) * FL?NSteps
PHYSICAL ADDRESS
The physical I2C address dedicated to the NCP5608 to support the I2C protocol is: 0111 001X → $72. The external
controller must fulfill the I2C protocol to drive the chip: see I2C?BUS SPECIFICATION, Version 2.1. The NCP5608
operates as a Slave only and never takes over the I2C control.
Table 3. NCP5608 Operation Truth Table
PWRLED_BK (0?7)
$00
>$80
>$00
PWRLED_FL (0?7)
$00
X
X
Output Voltage
Forced to zero
Vfbk + Vsense
Vfbk + Vsense
Comments
DC?DC = OFF
DC?DC = ON, LED1 to LED4 active
DC?DC = ON, LED1 to LED3 active
LED4 deactivated
X
>$00
Vffl + Vsense
DC?DC = ON
The I2C protocol is based on the standard format defined
in the industry. Basically, the DATA is transferred from the
MCU to the NCP5608 registers by means of the SDA
message associated to the SCL clock. The MCU presents
MPU send bit
PHYSICAL ADDRESS FRAME
MPU enables clock
the 8 bits during the low state of the SCK signal and the
peripheral device ( in our case, the NCP5608) shall reads
the bits during the high state of the same clock. The transfer
is MSB first as depicted in Figure 5.
DATA FRAME
B7
B6
B5
B4
B3
B2
B1
B0
ACK B7
B6
B5
B4
B3
B2
B1
B0
ACK
CLOCK
The NCP5608 reads one bit
DATA
Start
Stop
The NCP5608 send ACK
NOTE: See I2C?BUS SPECIFICATION, Version 2.1, January 2000, for further timing details.
Figure 5. Basic I2C Timings
http://onsemi.com
10
相关PDF资料 |
PDF描述 |
|---|---|
| NCP5612GEVB | EVAL BOARD FOR NCP5612G |
| NCV7680PWR22GEVB | BOARD EVALUATION NCV7680 |
| NDNA200 | DIN-RAIL 35MM ALUMINUM 2M |
| NG-9517 | CABLE GLAND NEMA 4X PG-29 BLACK |
| NH2503K000FJ01 | 250WATTS 3KOHMS 1% NON-INDUCTIVE |
相关代理商/技术参数 |
参数描述 |
|---|---|
| NCP5608MTR2G | 功能描述:LED照明驱动器 MULT LED BOOST DR 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 |
| NCP561 | 制造商:ONSEMI 制造商全称:ON Semiconductor 功能描述:AC-DC Offline Switching Controllers/Regulators |
| NCP561/D | 制造商:未知厂家 制造商全称:未知厂家 功能描述:150 mA CMOS Low Iq Low-Dropout Voltage Regulator |
| NCP5612 | 制造商:ONSEMI 制造商全称:ON Semiconductor 功能描述:High Efficiency Ultra Small Thinnest White LED Driver |
| NCP5612GEVB | 功能描述:LED 照明开发工具 NCP5612 EVAL BRD 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: |
发布紧急采购，3分钟左右您将得到回复。