收藏本站
NUD4001, NSVD4001
APPLICATION INFORMATION
Design Guide
NUD4001
1. Define LED’s current:
a. I LED = 350 mA
V in
Boost
1
2
8
7
I out
I out
2. Calculate Resistor Value for R ext :
a. R ext = V sense (see Figure 2) / I LED
b. R ext = 0.7 (T J = 25 ° C)/ 0.350 = 2.0 W
3. Define V in :
a. Per example in Figure 6, V in = 12 V
R ext
GND
3
4
Current
Set Point
6
5
I out
I out
4. Define V LED @ I LED per LED supplier ’s data
sheet:
a. Per example in Figure 6,
V LED = 3.5 V + 3.5 V + 3.5 V = 10.5 V
12 V
Figure 6. 12 V Application
(Series LED’s Array)
5. Calculate V drop across the NUD4001 device:
a. V drop = V in – V sense – V LED
b. V drop = 12 V – 0.7 V (T J = 25 ° C) – 10.5 V
c. V drop = 0.8 V
6. Calculate Power Dissipation on the NUD4001
device’s driver:
a. P D_driver = V drop * I out
b. P D_driver = 0.8 V x 0.350 A
c. P D_driver = 0.280 Watts
7. Establish Power Dissipation on the NUD4001
device’s control circuit per Figure 4:
a. P D_control = Figure 4, for 12 V input voltage
b. P D_control = 0.055 W
8. Calculate Total Power Dissipation on the device:
a. P D_total = P D_driver + P D_control
b. P D_total = 0.280 W + 0.055 W = 0.335 W
9. If P D_total > 1.13 W (or derated value per
Figure 3), then select the most appropriate
recourse and repeat steps 1 through 8:
a. Reduce V in
b. Reconfigure LED array to reduce V drop
c. Reduce I out by increasing R ext
d. Use external resistors or parallel device’s
configuration (see application note AND8156)
10. Calculate the junction temperaure using the
thermal information on Page 7 and refer to Figure
5 to check the output current drop due to the
calculated junction temperature. If desired,
compensate it by adjusting the value of R ext .
http://onsemi.com
4
发布紧急采购，3分钟左右您将得到回复。

采购需求

(若只采购一条型号，填写一行即可)

发布成功！您可以继续发布采购。也可以进入我的后台，查看报价

发布成功！您可以继续发布采购。也可以进入我的后台，查看报价

*型号 *数量 厂商 批号 封装
添加更多采购

我的联系方式

*
*
*
相关PDF资料
NV890101MWTXGEVB BOARD EVAL NV890101MWTX
NV890201MWTXGEVB BOARD EVAL NV890201MWTX
ODC5ML OUTPUT MODULE DC STD 18MA 5VDC
ODC5ML OUTPUT MODULE DC STD 18MA 5VDC
ODC5Q.11 OUTPUT MODULE DC QUAD 18MA 5VDC
ODC5Q OUTPUT MODULE DC QUAD 18MA 5VDC
ODCM-15 OUTPUT MODULE DC 16MA 15VDC
OR4E6-FPGA-EV BOARD EVAL FOR ORCA OR4E6 FPGA
相关代理商/技术参数
NSVDTA143ZET1G 制造商:ON Semiconductor 功能描述:SS SC75 BR XSTR PNP 50V - Tape and Reel
NSVDTC114YM3T5G 制造商:ON Semiconductor 功能描述:SS SOT723 BIAS RES XSTR - Tape and Reel
NSVDTC143ZET1G 制造商:ON Semiconductor 功能描述:SS SC75 BR XSTR NPN 50V - Tape and Reel
NSVDTC144WET1G 制造商:ON Semiconductor 功能描述:SS SC75 BR XSTR NPN 50V - Tape and Reel
NSVED06I1632BL 制造商:Panduit Corp 功能描述:VERTICAL EXHAUST DUCT (VED) FO 制造商:Panduit Corp 功能描述:VERTICAL EXHAUST DUCT (VED) FOR NET-SERV - Bulk
NSVED06I1632WH 制造商:Panduit Corp 功能描述:VERTICAL EXHAUST DUCT (VED) FO 制造商:Panduit Corp 功能描述:VERTICAL EXHAUST DUCT (VED) FOR NET-SERV - Bulk
NSVED06I3266BL 制造商:Panduit Corp 功能描述:VERTICAL EXHAUST DUCT (VED) FO 制造商:Panduit Corp 功能描述:VERTICAL EXHAUST DUCT (VED) FOR NET-SERV - Bulk
NSVED06I3266WH 制造商:Panduit Corp 功能描述:VERTICAL EXHAUST DUCT (VED) FO 制造商:Panduit Corp 功能描述:VERTICAL EXHAUST DUCT (VED) FOR NET-SERV - Bulk