NCL30001DR2G ON Semiconductor, NCL30001DR2G Datasheet - Page 8

• 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

current starts to flow through the sense resistor R
current creates a voltage drop V
is negative with respect to GND. Since the comparator
connected to CS pin requires a positive voltage, a voltage
V
source which level−shifts the negative voltage V
level−shift current is in the range from 12.5 to 50 mA
depending on the optional input voltage compensation loop
control block signal (see more details in the input voltage
compensation section). The peak inductor current is equal
to:
should be used. The Equation 1 shows the higher drop on
R
comparator threshold which is nominally 38 mV.
condition mode is shown in Figure 16.
based on the range of control possible via the IVC input.
OFF Time Control
capacitor, controls the switch−off time. In addition, the
optional IVC control signal can modulate the off time based
on input line voltage conditions. This block is illustrated in
Figure 17.
shift
CS
Once the external MOSFET is switched on, the inductor
To achieve the best I
A typical CS pin voltage waveform for continuous
Figure 16 also shows the effect of the inductor current
The internal current source, together with an external
reduces the influence of the V
is developed across the resistor R
V
0
I
shift
I
shift
Turn on
Figure 16. CS Pin Voltage
Switch
= 12.5 mA
= 50 mA
I
pk
+
I
pk
CS
precision, higher values of I
@ R
R
CS
shift
CS
on the resistor R
* V
th
tolerance. Vth is the
th
shift
by a current
t
CS
CS
CS
, which
(eq. 1)
http://onsemi.com
. The
. The
CS
8
discharged by an internal switch. As soon as the latch output
changes to a low state, the I
across C
threshold given by the V
can change this threshold. The IVC operation will be
discussed in the next section.
Figure 18. The bold line shows the minimum IVC current
when the off time is at its minimum. The amount of current
injected into the IVC input can increase the off time by
changing the turn off comparator switching threshold. I1, I2,
During the switch−on time, the C
The voltage that can be observed on C
CT
T
Voltage
CT pin
Voffset
starts to ramp−up until its value reaches the
CT
VDD
V
Figure 17. OFF Time Control
0
Figure 18. CT Pin Voltage
I
I
VC
VC
50 mA
Goes Up
Goes Down
t
off−min
Compensation Block
From Input Voltage
offset
I1
source
I2
. The current injected into IVC
I3
VOffset
is enabled and the voltage
VOffset to VDD
GND
To Latch’s Output
T
To Latch’s Set Input
capacitor is kept
T
pin is shown in
t