- 您现在的位置：买卖IC网 > Datasheet目录318 > CAT4106YP-T2 (ON Semiconductor)IC LED DVR 4CH BOOST 16TSSOP Datasheet资料下载
参数资料
| 型号： | CAT4106YP-T2 |
| 厂商： | ON Semiconductor |
| 文件页数： | 10/15页 |
| 文件大小： | 0K |
| 描述： | IC LED DVR 4CH BOOST 16TSSOP |
| 标准包装： | 1 |
| 恒定电流： | 是 |
| 拓扑： | PWM，升压（升压） |
| 输出数： | 4 |
| 内部驱动器： | 是 |
| 类型 - 主要： | 汽车，背光，通用型 |
| 频率： | 700kHz ~ 1.3MHz |
| 电源电压： | 3 V ~ 5.5 V |
| 输出电压： | 36V |
| 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： | 标准包装 |
| 工作温度： | -40°C ~ 85°C |
| 其它名称： | CAT4106YP-T2OSDKR |
CAT4106
Device Operation
In a typical application, the CAT4106 drives an LED array
consisting of up to four separate strings. A single external
resistor value is used to select the drive level in all output
channels. Each channel provides a very well regulated and
tightly matched bias current on all LED strings.
An integrated DC/DC boost converter is used to generate
the high voltage output required to power the LED strings.
Up to a maximum of 6 W of LED power can be delivered
when powered from a 12 V supply.
To offer improved performance, the device also allows the
user to set the operating voltage level on the output drive
channels. A pair of external resistors is used to control the
nominal channel voltage, during normal operation. The
resulting output voltage (LED anodes) will be equal to the
sum of the adjusted channel voltage plus the maximum
forward voltage present on any string.
The CAT4106 provides four tightly matched current sinks
to accurately regulate LED current in each channel. Up to
175 mA per channel can be programmed by selecting a
suitable value for the external R1 resistor (connected
between RSET and GND pins).
LED Current Setting
The CAT4106 provides four tightly matched current sinks
to accurately regulate LED current in each channel. The
LED current is set by the external resistor R1 connected
between the RSET pin and ground. The following formula
gives the relationship between the resistor value and the
LED current per channel.
LED Detection
The CAT4106 detects failure conditions related to the
LED load, such as if one of the LED strings has been
disconnected (Open ? LED) or if one LED string has a lower
LED pin voltage than expected (Short ? LED). Either
condition is flagged by turning on the open ? drain output on
the FAULT pin. The Open ? LED detection is active in
normal operation. The Short ? LED detection is only active
during power ? up, just after the EN/PWM input goes from
low to high. If in normal operation (LEDs are in regulation)
a short ? LED condition occurs, it will not be detected.
Figure 25. Cold Power ? Up Short ? LED Detection
R1 [ 103
1.2 V
LED current per channel
Table 6. RESISTOR R1 AND LED CURRENT
LED Current per Channel (mA)
10
20
R1 ( W )
12.4 k
6.19 k
30
50
100
150
4.12 k
2.49 k
1.24 k
820
Figure 26. Normal Operation Open ? LED Detection
The test condition in Figure 25 is with one LED pin
shorted to the output (top LED anode). The test condition in
Figure 26 is with one LED pin floating or disconnected. In
both cases, the CAT4106 is set to drive 50 mA per channel.
Lowest LED pin voltage + V FB
Setting the Channel Voltage
Each LED channel typically requires less than 0.5 V of
headroom for full load operation. The lowest channel
operating voltage can be controlled and programmed via the
external resistor network connected between, CTRL, FB
and GND as shown in Figure 24.
R2 ) R3
R3
For most applications, a gain of 2x (R2 equals R3) is
recommended. The CTRL output pin has optimal
performance when loaded with around 15 m A, which
equates to an R3 resistor value of 20 k W .
Setting VFMIN Level (Short ? LED)
The VFMIN level represents the minimum level expected
for the LED string voltage “window of operation”. This
voltage setting is based on the number of series LEDs being
used and the expected minimum forward voltage V F during
normal operation.
Example: Consider a string of 6 LEDs in series, with each
LED having a V F range of 3.5 V ± 0.5 V. Since the
minimum V F of each LED is 3.0 V the overall lowest
expected string voltage would be 18 V. Any string voltage
of less than 18 V is considered as a short ? circuit fault in one
or more of the series LEDs.
http://onsemi.com
10
相关PDF资料 |
PDF描述 |
|---|---|
| CAT4109V-GT2 | IC LED DRIVER RGB 16-SOIC |
| CAT4134HV2-T2 | IC LED DRVR BKLGHT FLASH 12-TDFN |
| CAT4137TD-T3 | IC LED DRVR WHITE BCKLGHT TSOT-5 |
| CAT4139TD-GT3 | IC LED DRVR WHITE BCKLGT TSOT-5 |
| CAT4237TD-T3 | IC LED DRVR WHITE BCKLGHT TSOT-5 |
相关代理商/技术参数 |
参数描述 |
|---|---|
| CAT4107HV4-GT2 | 制造商:ON Semiconductor 功能描述: |
| CAT4109 | 制造商:ONSEMI 制造商全称:ON Semiconductor 功能描述:3-Channel Constant-Current RGB LED Driver with Individual PWM Dimming |
| CAT4109VG | 制造商:Catalyst Semiconductor 功能描述: |
| CAT4109V-GT2 | 功能描述:LED照明驱动器 LED Driver 3ch RGB PWM 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 |
| CAT4-11E | 制造商:ABB Control 功能描述:CONTACT BLKAUXFRNT1NO+1NC |
发布紧急采购，3分钟左右您将得到回复。