NCL30001DR2G ON Semiconductor, NCL30001DR2G Datasheet - Page 13

• Manufacturer Part Number: NCL30001DR2G
• Description: IC ANA PFC CONTROLLER 16SO
• Manufacturer: ON Semiconductor
• Type: General Purposer

Specifications of NCL30001DR2G

• Constant Current: *
• Constant Voltage: *
• Topology: *
• Number Of Outputs: *
• Internal Driver: *
• Type - Primary: *
• Type - Secondary: *
• Frequency: *
• Voltage - Supply: *
• Voltage - Output: *
• Mounting Type: Surface Mount
• Package / Case: 16-SOIC (0.154", 3.90mm Width)
• Operating Temperature: *
• Current - Output / Channel: *
• Internal Switch(s): Yes
• Efficiency: *
• Operating Supply Voltage: 18 V
• Maximum Supply Current: 1.15 mA
• Maximum Operating Temperature: + 125 C
• Mounting Style: SMD/SMT
• Minimum Operating Temperature: - 40 C
• No. Of Outputs: 1
• Operating Temperature Range: -40°C To +125°C
• Driver Case Style: SOIC
• Switching Frequency: 100kHz
• Rohs Compliant: Yes
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Other names: NCL30001DR2G; NCL30001DR2GOSTR

Application Design Example:
A typical step down application will be used to illustrate the basic design process based on nominal design parameters:
•
•
•
•
•
•
Dimming using PWM signal 1 kHz with duty cycle 0 – 99%
any parasitic contribution of the PCB.
First, we need to determine the nominal t
Next the typical duty cycle (DC) will be calculated:
Target switching frequency is set at 450 kHz, now we need
to determine the period:
Combination the previous equation we can calculate the t
and t
t
t
Note this simplified step−by−step design process neglects
ON
OFF
Input voltage:
Nominal LED current:
LED
V
Freewheel diode V
Target Switching Frequency:
LED
OFF
+ DC @ T + 0.296 @ 2.222 @ 10
+ ( 1 * DC ) @ T + ( 1 * 0.296 ) @ 2.222 @ 10
+ 1.564 ms
ripple
:
durations:
DC +
Vac
Vac
t
t
on
off
:
T +
+
t
V
ON
V
f
in
1
op
LED
t
) t
* V
ON
+
DIMM
f
0/5 V
:
) V
OFF
450 @ 10
LED
D4
D5
D6
D7
f
+
1
+
3.7 ) 8.8
3.2 ) 0.5
12 * 3.2
12 V
3
3.7
+ 2.222 ms
700 mA (rms)
3.2 V
0.5 V
V
120 mA (peak−to−peak)
450 kHz
R9
C1
−6
in
R3
R5
R4
R8
+ 658 ns
− 12 Vac (12 V dc after the bridge)
+ 0.296
ON
Figure 25. Example Design Schematic
+
C2
/t
3.7
8.8
OFF
ratio:
−6
(eq. 10)
(eq. 7)
(eq. 8)
(eq. 9)
http://onsemi.com
NCL30100
CS
GND
CT
ON
IC1
DRV
VCC
IVC
C5
13
value:
A standard value 47 mH is chosen.
first determine the IVC current which can be simply
calculated.
current to the input voltage. If the input voltage is well
regulated, the IVC pin should be grounded. The value for
IVC resistor should be chosen based on graphs below.
dimming since increasing the current into IVC pin will
decrease the I
R1
V +
I
C3
Now all the parameters are defined to calculate inductor
Next the CT capacitor can be calculated, but we need to
The IVC current controls the dependence of the peak
Note as well that the IVC can be used to implement analog
IVC
+
di @ L
D3
dt
R ) R
D2
å L +
R2
V
peak
IVC
+
of the LED).
+
( 12 * 3.2 ) @ 658 @ 10
Q1
V
1.5 @ 10
IN
D1
* V
I
Q2
ripple
LED
0.12
6
12
) 17 @ 10
@ t
L3
ON
−9
3
^ 7.91 mA
^ 48.3 mH
A
K
(eq. 12)
(eq. 11)