|
|
PDF FL7930CMX Data sheet ( Hoja de datos )
| Número de pieza | FL7930CMX | |
| Descripción | Single-Stage Flyback and Boundary-Mode PFC Controller | |
| Fabricantes | Fairchild Semiconductor | |
| Logotipo |  |
|
Hay una vista previa y un enlace de descarga de FL7930CMX (archivo pdf) en la parte inferior de esta página. Total 22 Páginas | ||
|
No Preview Available !
October 2013
FL7930C
Single-Stage Flyback and Boundary-Mode PFC
Controller for Lighting
Features
PFC-Ready Signal
VIN-Absent Detection
Maximum Switching Frequency Limitation
Internal Soft-Start and Startup without Overshoot
Internal Total Harmonic Distortion (THD) Optimizer
Precise Adjustable Output Over-Voltage Protection
Open-Feedback Protection and Disable Function
Zero-Current Detector (ZCD)
150 μs Internal Startup Timer
MOSFET Over-Current Protection (OCP)
Under-Voltage Lockout with 3.5 V Hysteresis
Low Startup and Operating Current
Totem-Pole Output with High State Clamp
+500/-800 mA Peak Gate Drive Current
8-Pin, Small Outline Package (SOP)
Applications
Ballast
General LED Lighting
Industrial, Commercial, and Residential Fixtures
Outdoor Lighting: Street, Roadway, Parking,
Construction, Ornamental LED Lighting Fixtures
Description
The FL7930C is an active power factor correction (PFC)
controller for boost PFC applications that operate in
critical conduction mode (CRM). It uses a voltage-mode
PWM that compares an internal ramp signal with the
error amplifier output to generate a MOSFET turn-off
signal. Because the voltage-mode CRM PFC controller
does not need rectified AC line voltage information, it
saves the power loss of an input voltage-sensing network
necessary for a current-mode CRM PFC controller.
FL7930C provides over-voltage protection (OVP), open-
feedback protection, over-current protection (OCP),
input-voltage-absent detection, and under-voltage
lockout protection (UVLO). The PFC-ready pin can be
used to trigger other power stages when PFC output
voltage reaches the proper level with hysteresis. The
FL7930C can be disabled if the INV pin voltage is lower
than 0.45 V and the operating current decreases to a
very low level. Using a new variable on-time control
method, total harmonic distortion (THD) is lower than in
conventional CRM boost PFC ICs.
Ordering Information
Part Number
Operating
Temperature Range
Top Mark
Package
Packing
Method
FL7930CMX_G
-40 to +125°C
FL7930CG 8-Lead, Small Outline Package (SOP) Tape & Reel
© 2011 Fairchild Semiconductor Corporation
FL7930C • Rev. 1.0.3
www.fairchildsemi.com
1 page  
Electrical Characteristics
VCC = 14 V and TA = -40°C~+125°C, unless otherwise specified.
Symbol
Parameter
Conditions
VCC Section
VSTART Start Threshold Voltage
VSTOP Stop Threshold Voltage
HYUVLO UVLO Hysteresis
VZ Zener Voltage
VOP Recommended Operating Range
Supply Current Section
VCC Increasing
VCC Decreasing
ICC=20 mA
ISTART Startup Supply Current
IOP Operating Supply Current
IDOP Dynamic Operating Supply Current
IOPDIS Operating Current at Disable
Error Amplifier Section
VCC=VSTART-0.2 V
Output Not Switching
50 kHz, CI=1 nF
VINV=0 V
VREF1
VREF1
VREF2
IEA,BS
IEAS,SR
IEAS,SK
VEAH
VEAZ
gm
Voltage Feedback Input Threshold1 TA=25°C
Line Regulation
Temperature Stability of VREF1(4)
VCC=14 V~20 V
Input Bias Current
VINV=1 V~4 V
Output Source Current
VINV=VREF -0.1 V
Output Sink Current
VINV=VREF +0.1 V
Output Upper Clamp Voltage
VINV=1 V, VCS=0 V
Zero-Duty Cycle Output Voltage
Transconductance(4)
Maximum On-Time Section
tON,MAX1
tON,MAX2
Maximum On-Time Programming 1 TA=25°C, VZCD=1 V
Maximum On-Time Programming 2
TA=25°C,
IZCD=0.469 mA
Current-Sense Section
VCS
Current-Sense Input Threshold
Voltage Limit
ICS,BS
tCS,D
Input Bias Current
Current-Sense Delay to Output(4)
VCS=0 V~1 V
dV/dt=1 V/100 ns,
from 0 V to 5 V
Min.
11
7.5
3.0
20
13
90
2.465
-0.5
6.0
0.9
90
35.5
11.2
0.7
-1.0
Typ. Max. Unit
12 13 V
8.5 9.5 V
3.5 4.0 V
22 24 V
20 V
120 190 µA
1.5 3.0 mA
2.5 4.0 mA
160 230 µA
2.500
0.1
20
-12
12
6.5
1.0
115
2.535
10.0
0.5
7.0
1.1
140
V
mV
mV
µA
µA
µA
V
V
µmho
41.5 47.5 µs
13.0 14.8 µs
0.8 0.9 V
-0.1 1.0 µA
350 500 ns
Continued on the following page…
© 2011 Fairchild Semiconductor Corporation
FL7930C • Rev. 1.0.2
5
www.fairchildsemi.com
5 Page 
Applications Information
1. Startup: Normally, supply voltage (VCC) of a PFC
block is fed from the additional power supply, which can
be called standby power. Without this standby power,
auxiliary winding for zero current detection can be used
as a supply source. Once the supply voltage of the PFC
block exceeds 12 V, internal operation is enabled until
the voltage drops to 8.5 V. If VCC exceeds VZ, 20 mA
current is sinking from VCC.
VINPFC
PFC Inductor
VOUTPFC
Aux. Winding
External VCC circuit
when no standby power exists
FL7930 Rev.00
VREF
VBIAS
2.5VREF VCC’
Internal
Bias
H:open
reset
-
+
8.5 12
VCC
8
VZ
VTH(S/S) 20mA
Figure 22. Startup Circuit
2. INV Block: Scaled-down voltage from the output is
the input for the INV pin. Many functions are embedded
based on the INV pin: transconductance amplifier,
output OVP comparator, disable comparator, and output
UVLO comparator.
For the output voltage control, a transconductance
amplifier is used instead of the conventional voltage
amplifier. The transconductance amplifier (voltage-
controlled current source) aids the implementation of
the OVP and disable functions. The output current of
the amplifier changes according to the voltage
difference of the inverting and non-inverting input of
the amplifier. To cancel down the line input voltage
effect on power factor correction, the effective control
response of the PFC block should be slower than the
line frequency and this conflicts with the transient
response of controller. Two-pole one-zero type
compensation can meet both requirements.
The OVP comparator shuts down the output drive block
when the voltage of the INV pin is higher than 2.675 V
and there is 0.175 V hysteresis. The disable comparator
disables operation when the voltage of the inverting input
is lower than 0.35 V and there is 100 mV hysteresis. An
external small-signal MOSFET can be used to disable the
IC, as shown in Figure 23. The IC operating current
decreases to reduce power consumption if the IC is
disabled. Figure 24 is the timing chart of the internal
circuit near the INV pin when rated PFC output voltage
is 390 VDC and VCC supply voltage is 15 V.
UVLO
disable
OVP
2.5 2.675
disable
INV open
0.35 0.45
high
VCC’
2.051 2.240
2
RDY
3
COMP
2.240V/2.051V
2.675V/2.5V
0.45V/0.35V
2.5V
INV
1
FL7930 Rev.00
VOUTPFC
disable
Figure 23.
VOUTPFC
390Vdc
349V
Circuit Around INV Pin
413V
390V
320V
70V
VINV
2.50V
2.24V
0.45V
VCC
15V
2.0V
IOUTCOMP
Disable
Current sourcing
2.65V
55V
2.50V
2.051V
0.35V
I sinking
Current sourcing
VRDY
Voltage is decided by pull-up voltage.
OVP
Vcc<2V, internal logic is not alive.
- RDY pin is floating, so pull up voltage is shown.
- Internal signals are unknown.
Figure 24. Timing Chart for INV Block
t
3. RDY Output: When the INV voltage is higher than
2.24 V, RDY output is triggered HIGH and lasts until the
INV voltage is lower than 2.051 V. When input AC
voltage is quite high, for example 240 VAC, PFC output
voltage is always higher than RDY threshold, regardless
of boost converter operation. In this case, the INV
voltage is already higher than 2.24 V before PFC VCC
touches VSTART; however, RDY output is not triggered to
HIGH until VCC touches VSTART. After boost converter
operation stops, RDY is not pulled LOW because the
INV voltage is higher than the RDY threshold. When VCC
of the PFC drops below 5 V, RDY is pulled LOW even
though PFC output voltage is higher than threshold. The
RDY pin output is open drain, so needs an external pull-
up resistor to supply the proper power source. The RDY
pin output remains floating until VCC is higher than 2 V.
© 2011 Fairchild Semiconductor Corporation
FL7930C • Rev. 1.0.2
11
www.fairchildsemi.com
11 Page | ||
| Páginas | Total 22 Páginas | |
| PDF Descargar | [ Datasheet FL7930CMX.PDF ] | |
Hoja de datos destacado
| Número de pieza | Descripción | Fabricantes |
| FL7930CMX | Single-Stage Flyback and Boundary-Mode PFC Controller | Fairchild Semiconductor |
| Número de pieza | Descripción | Fabricantes |
| SLA6805M | High Voltage 3 phase Motor Driver IC. |
 Sanken |
| SDC1742 | 12- and 14-Bit Hybrid Synchro / Resolver-to-Digital Converters. |
 Analog Devices |
|
DataSheet.es es una pagina web que funciona como un repositorio de manuales o hoja de datos de muchos de los productos más populares, |
| DataSheet.es | 2020 | Privacy Policy | Contacto | Buscar |