NSI45090DDT4G ON Semiconductor, NSI45090DDT4G Datasheet - Page 5

• Manufacturer Part Number: NSI45090DDT4G
• Description: IC LED DRIVER/REG CCR DPAK-4
• Manufacturer: ON Semiconductor
• Type: Linear (Non-Switching)r

Specifications of NSI45090DDT4G

• Package / Case: DPak, TO-252 (2 leads+tab), SC-63
• Operating Temperature: -55°C ~ 150°C
• Number Of Outputs: 1
• Current - Output / Channel: 90mA
• Internal Switch(s): No
• Maximum Supply Current: 160 mA
• Maximum Power Dissipation: 2.7 W
• 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: -
• Efficiency: -
• Topology: -
• Lead Free Status / Rohs Status: Lead free / RoHS Compliant

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
is 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:
140
120
100
Constant current extends LED strings lifetime, see Figure 10
80
60
40
20
Current supplied to LED string decreases as temperature
0
Current decreases as voltage increases, see Figure 10
9
Circuit Current with
CCR Device
Circuit Current
with 83.3 W
T
Little variation of power in LEDs, see Figure 11
Fewer components, less board space required
A
Constant brightness over full Supply Voltage
= 25°C
Single resistor is used for current select
10
increases (self-limiting), see Figure 2
reg(P)
ON Semiconductor CCR Design
reg(SS)
Figure 10. Series Circuit Current
(more efficient), see Figure 10
Surface mount component
) testing is applicable for factory and
11
)
12
V
in
Representative Test Data
for Figure 8 Circuit, Current
of LEDs, FR−4 @ 300 mm
2 oz Copper Area
(V)
13
reg(P)
) vs DC
14
reg(SS)
15
reg(P)
) testing
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)
800
700
600
500
400
300
200
100
(need for several resistor values to match LED intensity)
0
9
LED current decreases as temperature increases
More components, more board space required
LED Power
with 83.3 W
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 11. LED Power
will always be greater than I
12
V
in
(V)
Representative Test Data
for Figure 8 Circuit, Pd of
LEDs, FR−4 @ 300 mm
2 oz Copper Area
13
reg(SS)
14
. This heating
15
reg(SS)
2
,
16