ncp1608 ON Semiconductor, ncp1608 Datasheet - Page 3

• Manufacturer Part Number: ncp1608
• Description: Critical Conduction Mode Pfc Controller Utilizing A Transconductance Error Amplifier
• Manufacturer: ON Semiconductor

Stresses exceeding Maximum Ratings may damage the device. Maximum Ratings are stress ratings only. Functional operation above the
Recommended Operating Conditions is not implied. Extended exposure to stresses above the Recommended Operating Conditions may affect
device reliability.
1. This device series contains ESD protection and exceeds the following tests:
2. This device contains Latch−Up protection and exceeds ± 100 mA per JEDEC Standard JESD78.
3. As mounted on a 40x40x1.5 mm FR4 substrate with a single layer of 80 mm
4. As mounted on a 40x40x1.5 mm FR4 substrate with a single layer of 650 mm
FB Voltage
FB Current
Control Voltage
Control Current
Ct Voltage
Ct Current
CS Voltage
CS Current
ZCD Voltage
ZCD Current
DRV Voltage
DRV Sink Current
DRV Source Current
Supply Voltage
Supply Current
Power Dissipation (T
Thermal Resistance Junction−to−Ambient
(2.0 Oz Cu, 55 mm
Junction−to−Air , Low conductivity PCB (Note 3)
Junction−to−Air , High conductivity PCB (Note 4)
Operating Junction Temperature Range
Maximum Junction Temperature
Storage Temperature Range
Lead Temperature (Soldering, 10 s)
Table 1. PIN FUNCTION DESCRIPTION
Table 2. MAXIMUM RATINGS
Pin
1
2
3
4
5
6
7
8
a JEDEC 51 low conductivity test PCB. Test conditions were under natural convection or zero air flow.
for a JEDEC 51 high conductivity test PCB. Test conditions were under natural convection or zero air flow.
Pins 1– 8: Human Body Model 2000 V per JEDEC Standard JESD22−A114E.
Pins 1– 8:
Control
Name
GND
ZCD
DRV
V
CS
FB
Ct
CC
Machine Model Method 200 V per JEDEC Standard JESD22−A115−A.
The FB pin is the inverting input of the internal error amplifier. A resistor divider scales the output voltage to V
tain regulation. The feedback voltage is used for overvoltage and undervoltage protections. The controller is disabled
when this pin is forced to a voltage less than V
The Control pin is the output of the internal error amplifier. A compensation network is connected between the Control pin
and ground to set the loop bandwidth. A low bandwidth yields a high power factor and a low Total Harmonic Distortion (THD).
The Ct pin sources a current to charge an external timing capacitor. The circuit controls the power switch on time by com-
paring the Ct voltage to an internal voltage derived from V
end of the on time.
The CS pin limits the cycle−by−cycle current through the power switch. When the CS voltage exceeds V
turns off. The sense resistor that connects to the CS pin programs the maximum switch current.
The voltage of an auxiliary winding is sensed by this pin to detect the inductor demagnetization for CrM operation.
The GND pin is analog ground.
The integrated driver has a typical source impedance of 12 W and a typical sink impedance of 6 W.
The V
when V
2
A
Printed Circuit Copper Clad)
= 70°C, 2.0 Oz Cu, 55 mm
CC
CC
pin is the positive supply of the controller. The controller is enabled when V
decreases to less than V
Rating
2
Printed Circuit Copper Clad)
CC(off)
http://onsemi.com
.
UVP
, a voltage greater than V
3
Function
Control
2
of 2 oz copper traces and heat spreading area. As specified for
2
. The Ct pin discharges the external timing capacitor at the
of 2 oz copper traces and heat spreading area. As specified
I
DRV(source)
I
Symbol
V
DRV(sink)
T
I
Control
V
V
T
R
R
R
J(MAX)
Control
V
I
V
V
V
I
ZCD
I
I
P
I
STG
T
ZCD
DRV
T
FB
CS
CC
qJA
qJA
qJA
Ct
CS
CC
FB
Ct
D
L
OVP
J
, or floating.
CC
exceeds V
−0.3 to V
−0.3 to 6.5
−40 to 125
−65 to 150
−0.3 to 10
−0.3 to 10
−0.3 to 20
−0.3 to 6
−0.3 to 6
−2 to 10
Value
±10
±10
±10
±10
800
500
±20
450
178
168
127
150
300
CC(on)
CC
ILIM
and is disabled
, the drive
REF
to main-
°C/W
Unit
mW
mA
mA
mA
mA
mA
mA
mA
mA
°C
°C
°C
°C
V
V
V
V
V
V
V