NUD4001DR2G ON Semiconductor, NUD4001DR2G Datasheet - Page 4

• Manufacturer Part Number: NUD4001DR2G
• Description: IC LED DRIVER LINEAR 8-SOIC
• Manufacturer: ON Semiconductor
• Type: Linear (Non-Switching)r

Specifications of NUD4001DR2G

• Constant Current: Yes
• Topology: PWM
• Number Of Outputs: 4
• Internal Driver: Yes
• Type - Primary: Automotive, General Purpose
• Voltage - Supply: 30V
• Voltage - Output: 28V
• Mounting Type: Surface Mount
• Package / Case: 8-SOIC (3.9mm Width)
• Operating Temperature: -40°C ~ 125°C
• Current - Output / Channel: 500mA
• Internal Switch(s): Yes
• Number Of Segments: 3
• Operating Supply Voltage: 30 V
• Maximum Power Dissipation: 1130 mW
• Maximum Operating Temperature: + 125 C
• Mounting Style: SMD/SMT
• Minimum Operating Temperature: - 40 C
• Operating Temperature (min): -40C
• Operating Temperature (max): 125C
• Operating Temperature Classification: Automotive
• Package Type: SOIC N
• Pin Count: 8
• Mounting: Surface Mount
• Power Dissipation: 1.13W
• Operating Supply Voltage (max): 30V
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Frequency: -
• Efficiency: -
• Lead Free Status / Rohs Status: Lead free / RoHS Compliant
• Other names: NUD4001DR2GOS; NUD4001DR2GOS; NUD4001DR2GOSTR

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