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PDF NCP1654 Data sheet ( Hoja de datos )
| Número de pieza | NCP1654 | |
| Descripción | Power Factor Controller | |
| Fabricantes | ON Semiconductor | |
| Logotipo |  |
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NCP1654
Power Factor Controller for
Compact and Robust,
Continuous Conduction
Mode Pre-Converters
The NCP1654 is a controller for Continuous Conduction Mode
(CCM) Power Factor Correction step−up pre−converters. It controls
the power switch conduction time (PWM) in a fixed frequency mode
and in dependence on the instantaneous coil current.
Housed in a SO8 package, the circuit minimizes the number of
external components and drastically simplifies the PFC
implementation. It also integrates high safety protection features that
make the NCP1654 a driver for robust and compact PFC stages like
an effective input power runaway clamping circuitry.
Features
• IEC61000−3−2 Compliant
• Average Current Continuous Conduction Mode
• Fast Transient Response
• Very Few External Components
• Very Low Startup Currents (< 75 mA)
• Very Low Shutdown Currents (< 400 mA)
• Low Operating Consumption
• ±1.5 A Totem Pole Gate Drive
• Accurate Fully Integrated 65/133/200 kHz Oscillator
• Latching PWM for cycle−by−cycle Duty−Cycle Control
• Internally Trimmed Internal Reference
• Undervoltage Lockout with Hysteresis
• Soft−Start for Smoothly Startup Operation
• Shutdown Function
• Pin to Pin Compatible with Industry Standard
• This is a Pb−Free Device
Safety Features
• Inrush Currents Detection
• Overvoltage Protection
• Undervoltage Detection for Open Loop Detection or Shutdown
• Brown−Out Detection
• Soft−Start
• Accurate Overcurrent Limitation
• Overpower Limitation
Typical Applications
• Flat TVs, PC Desktops
• AC Adapters
• White Goods, other Off−line SMPS
www.onsemi.com
8
1
SO−8
D SUFFIX
CASE 751
MARKING DIAGRAM
8
54Bxx
ALYW
G
1
xx = 65, 133 or 200
A = Assembly Location
L = Wafer Lot
Y = Year
W = Work Week
G = Pb−Free Package
PIN CONNECTIONS
Ground 1
8 Driver
VM 2
CS 3
7 VCC
6 Feedback
Brown−Out 4
5 Vcontrol
(Top View)
ORDERING INFORMATION
Device
Package Shipping†
NCP1654BD65R2G SO−8
2500 / Tape &
(Pb−Free)
Reel
NCP1654BD133R2G SO−8
2500 / Tape &
(Pb−Free)
Reel
NCP1654BD200R2G SO−8
2500 / Tape &
(Pb−Free)
Reel
†For information on tape and reel specifications,
including part orientation and tape sizes, please
refer to our Tape and Reel Packaging Specification
Brochure, BRD8011/D.
© Semiconductor Components Industries, LLC, 2016
January, 2016 − Rev. 5
1
Publication Order Number:
NCP1654/D
1 page  
NCP1654
DETAILED PIN DESCRIPTIONS
Pin Symbol
Name
1 GND
Ground
2 Vin
Multiplier
Voltage
3 CS Current Sense
Input
4 VBO Brown−Out / In
5 Vcontrol Control Voltage /
Soft−Start
6 VFB Feed−Back /
Shutdown
7 VCC Supply Voltage
8
DRV
Drive Output
Function
−
This pin provides a voltage VM for the PFC duty cycle modulation. The input impedance of the
PFC circuits is proportional to the resistor RM externally connected to this pin. The device
operates in average current mode if an external capacitor CM is connected to the pin.
Otherwise, it operates in peak current mode.
This pin sources a current ICS which is proportional to the inductor current IL. The sense
current ICS is for overcurrent protection (OCP), overpower limitation (OPL) and PFC duty cycle
modulation. When ICS goes above 200 mA, OCP is activated and the Drive Output is disabled.
Connect a resistor network among the rectified input voltage, BO pin, and ground. And connect
a capacitor between BO pin and ground. BO pin detects a voltage signal proportional to the
average input voltage.
When VBO goes below VBOL, the circuit that detects too low input voltage conditions
(brown−out), turns off the output driver and keeps it in low state until VBO exceeds VBOH.
This signal which is proportional to the RMS input voltage Vac is also for overpower limitation
(OPL) and PFC duty cycle modulation.
The voltage of this pin Vcontrol directly controls the input impedance. This pin is connected to
external type−2 compensation components to limit the Vcontrol bandwidth typically below 20 Hz
to achieve near unity power factor.
The device provides no output when Vcontrol < Vcontrol(min). When it starts operation, the power
increases slowly (soft−start).
This pin receives a feedback signal VFB that is proportional to the PFC circuits output voltage.
This information is used for both the output regulation, the overvoltage protection (OVP), and
output undervoltage protection (UVP) to protect the system from damage at feedback
abnormal situation.
When VFB goes above 105% VREF, OVP is activated and the Drive Output is disabled.
When VFB goes below 8% VREF, the device enters a low−consumption shutdown mode.
This pin is the positive supply of the IC. The circuit typically starts to operate when VCC
exceeds 10.5 V and turns off when VCC goes below 9 V. After start−up, the operating range is
9 V up to 20 V.
The high current capability of the totem pole gate drive (±1.5 A) makes it suitable to effectively
drive high gate charge power MOSFET.
www.onsemi.com
5
5 Page 
NCP1654
TYPICAL CHARACTERISTICS
11.4
11.2
11.0
10.8
10.6
10.4
10.2
10.0
9.8
9.6
−50
−25
0
25 50 75 100 125
TJ, JUNCTION TEMPERATURE (°C)
Figure 25. VCC Start−Up Threshold (VCC
Rising) vs. Temperature
2.0
1.8
1.6
1.4
1.2
1.0
−50
−25 0 25 50 75 100
TJ, JUNCTION TEMPERATURE (°C)
Figure 27. VCC UVLO Hysteresis vs.
Temperature
125
9.7
9.5
9.3
9.1
8.9
8.7
8.5
8.3
−50 −25 0 25 50 75 100 125
TJ, JUNCTION TEMPERATURE (°C)
Figure 26. VCC Disable Voltage after Turn−On
(VCC Falling) vs. Temperature
50
40
30
20
10
0
−50
−25 0 25 50 75 100
TJ, JUNCTION TEMPERATURE (°C)
125
Figure 28. Supply Current in Startup Mode vs.
Temperature
400 4
350 3 ICC2, No Load, Switching
ICC1, No Load, No Switching
300 2
250
200
−50 −25 0 25 50 75 100 125
TJ, JUNCTION TEMPERATURE (°C)
Figure 29. Supply Current in Shutdown Mode
vs. Temperature
1
0
−50 −25 0 25 50 75 100 125
TJ, JUNCTION TEMPERATURE (°C)
Figure 30. Operating Supply Current vs.
Temperature
www.onsemi.com
11
11 Page | ||
| Páginas | Total 23 Páginas | |
| PDF Descargar | [ Datasheet NCP1654.PDF ] | |
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