NCP1654BD65R2G ON Semiconductor, NCP1654BD65R2G Datasheet - Page 18

• Manufacturer Part Number: NCP1654BD65R2G
• Description: IC PFC CONTROLLER CCM 8SOIC
• Manufacturer: ON Semiconductor

Specifications of NCP1654BD65R2G

• Mode: Continuous Conduction (CCM)
• Frequency - Switching: 65kHz
• Current - Startup: 75µA
• Voltage - Supply: 10.5 V ~ 20 V
• Operating Temperature: -40°C ~ 125°C
• Mounting Type: Surface Mount
• Package / Case: 8-SOIC (3.9mm Width)
• Switching Frequency: 72 KHz
• Maximum Power Dissipation: 450 mW
• Maximum Operating Temperature: + 125 C
• Mounting Style: SMD/SMT
• Minimum Operating Temperature: - 40 C
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Other names: NCP1654BD65R2GOSTR

Soft Start
function are as shown in Figure 42 and Figure 43. The
device provides no output (or no duty ratio) when the
V
when:
•
•
conditions;
Undervoltage Protection, the 200 mA current source block
keeps off. Hence only the Operating Trans−conductance
Amplifier (OTA) raises the V
slowly. This is to obtain a slow increasing duty cycle and
hence reduce the voltage and current stress on the
MOSFET. A soft−start operation is obtained.
control
The block diagram and timing diagram of soft start
When the IC recovers from one of the following
Brown−out, or
Undervoltage Protection
UVLO, BO, or UVP
is lower than V
Vout Low Detect
Undervoltage
Vdd Rising
Reset
Vdd
Vfb
Set
CONTROL(min)
Q
Lockout,
control
. V
. And V
Period I
control
Figure 43. Soft Start Timing Diagram
Brown−out
is pulled low
control
http://onsemi.com
rises
or
18
Vdd
Vfb
Period II
V
control
Figure 42. Soft Start Block Diagram
Bias
6
5
V
95%
REF
Off
V
REF
S
R
-
+
-
+
Q
Q
OTA
V
±20 mA
out
95% V
Low Detect
BO
REF
BO
UVLO
200 mA
UVLO
UVP
Vdd