NSI45015WT1G ON Semiconductor, NSI45015WT1G Datasheet - Page 5

• Manufacturer Part Number: NSI45015WT1G
• Description: IC LED DRIVER LINEAR SOD-123
• Manufacturer: ON Semiconductor

Specifications of NSI45015WT1G

• Constant Current: Yes
• Topology: High Side, Linear, Low Side
• Number Of Outputs: 1
• Internal Driver: No
• Type - Primary: Automotive, Backlight
• Mounting Type: Surface Mount
• Package / Case: SOD-123
• Current - Output / Channel: 15mA
• Low Level Output Current: 12 mA
• High Level Output Current: 18 mA
• Operating Supply Voltage: 45 V
• Maximum Power Dissipation: 460 mW
• Maximum Operating Temperature: + 150 C
• Mounting Style: SMD/SMT
• Minimum Operating Temperature: - 55 C
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Voltage - Supply: -
• Voltage - Output: -
• Frequency: -
• Operating Temperature: -
• Lead Free Status / Rohs Status: Lead free / RoHS Compliant
• Other names: NSI45015WT1G; NSI45015WT1GOSTR

Current Regulation: Pulse Mode (I
Steady-State (I
Pulse mode (I
incoming inspection of a CCR where test times are a
minimum. (t < 300 ms). DC Steady-State (I
applicable for application verification where the CCR will
be operational for seconds, minutes, or even hours. ON
Semiconductor has correlated the difference in I
Comparison of LED Circuit using CCR vs. Resistor Biasing
There are two methods to measure current regulation:
Constant current extends LED strings lifetime, see Figure 9
20
15
10
Current supplied to LED string decreases as temperature
5
0
Constant brightness over full Automotive Supply Voltage
Current decreases as voltage increases, see Figure 9
9
Circuit Current with
CCR Device
Circuit Current
with 500 W
T
Little variation of power in LEDs, see Figure 10
Fewer components, less board space required
A
= 25°C
10
increases (self-limiting), see Figure 2
reg(P)
ON Semiconductor CCR Design
reg(SS)
Figure 9. Series Circuit Current
(more efficient), see Figure 9
Surface mount component
) testing is applicable for factory and
11
No resistors needed
)
12
V
in
Representative Test Data
for Figure 7 Circuit, Current
of LEDs, FR−4 @ 300 mm
1 oz Copper Area
(V)
13
reg(P)
) vs DC
reg(SS)
14
) testing is
15
reg(P)
http://onsemi.com
2
to
,
16
5
Large variations in brightness over full Automotive Supply Voltage
High Supply Voltage/ Higher Current in LED strings limits lifetime
I
copper thickness. I
due to the die temperature rising during I
effect can be minimized during circuit design with the
correct selection of board material, metal trace size and
weight, for the operating current, voltage, board operating
temperature (T
Characteristics table).
reg(SS)
130
120
100
110
(need for several resistor values to match LED intensity)
90
80
70
60
50
40
30
9
LED current decreases as temperature increases
LED Power
with 500 W
More components, more board space required
LED Power with
CCR Device
T
for stated board material, size, copper area and
Large variations of current (power) in LEDs
A
Current increases as voltage increases
= 25°C
10
Through-hole components
A
Requires costly inventory
Resistor Biased Design
) and package. (Refer to Thermal
reg(P)
11
Figure 10. LED Power
will always be greater than I
12
V
in
(V)
Representative Test Data
for Figure 7 Circuit, Pd of
LEDs, FR−4 @ 300 mm
1 oz Copper Area
13
reg(SS)
14
. This heating
15
reg(SS)
2
,
16