DataSheet.es    


PDF FL7733A Data sheet ( Hoja de datos )

Número de pieza FL7733A
Descripción Primary-Side-Regulated LED Driver
Fabricantes Fairchild Semiconductor 
Logotipo Fairchild Semiconductor Logotipo



Hay una vista previa y un enlace de descarga de FL7733A (archivo pdf) en la parte inferior de esta página.


Total 14 Páginas

No Preview Available ! FL7733A Hoja de datos, Descripción, Manual

December 2014
FL7733A
Primary-Side-Regulated LED Driver with Power Factor
Correction
Features
Performance
< ±3% Total Constant Current Tolerance Over All
Conditions
< ±1% Over Universal Line Voltage Variation
< ±1% from 50% to 100% Load Voltage Variation
< ±1% with ±20% Magnetizing Inductance Variation
Primary-Side Regulation (PSR) Control for Cost-
Effective Solution without Requiring Input Bulk
Capacitor and Secondary Feedback Circuitry
Application Input Voltage Range: 80 VAC - 308 VAC
High PF of >0.9, and Low THD of < 10% Over
Universal Line Input Range
Fast < 200 ms Start-up (at 85 VAC) using Internal
High-Voltage Startup with VDD Regulation
Adaptive Feedback Loop Control for Startup without
Overshoot
System Protection
LED Short / Open Protection
Output Diode Short Protection
Sensing Resistor Short / Open Protection
VDD Over-Voltage Protection (OVP)
VDD Under-Voltage Lockout (UVLO)
Over-Temperature Protection (OTP)
All Protections are Auto Restart (AR)
Cycle-by-Cycle Current Limit
Applications
Low to Mid Power LED Lighting Systems of 5 W to
greater than 60 W Compatible with Analog
Dimming function
Description
The FL7733A is a highly-integrated PWM controller
with advanced Primary-Side Regulation (PSR)
technique to minimize components in low-to-mid-power
LED lighting converters.
Using an innovative TRUECURRENT® technology to
provide tight tolerance constant-current output, this LED
driver enables designs with constant current (CC)
tolerance of less than ±1% over the universal line voltage
range to meet stringent LED brightness requirements.
By minimizing turn-on time fluctuation, high power factor
and low THD over the universal line range are obtained
in the FL7733A. An integrated high-voltage startup
circuit implements fast startup and high system
efficiency. During startup, adaptive feedback loop
control anticipates the steady-state condition and sets
initial feedback condition close to the steady state to
ensure no overshoot or undershoot of LED current.
The FL7733A also provides powerful protections, such
as LED short / open, output diode short, sensing
resistor short / open, and over-temperature for high
system reliability.
The FL7733A controller is available in an 8-pin Small-
Outline Package (SOP).
Related Product Resources
FL7733A Product Folder
.
Ordering Information
Part Number Operating Temperature Range
Package
Packing Method
FL7733AMX
-40°C to +125°C
8-Lead, Small Outline Package (SOP-8) Tape & Reel
© 2014 Fairchild Semiconductor Corporation
FL7733AMX • Rev. 1.2
www.fairchildsemi.com

1 page




FL7733A pdf
Electrical Characteristics
VDD=15 V, TJ=-40 to +125°C, unless otherwise specified. Currents are defined as positive into the device and
negative out of device.
Symbol
Parameter
Conditions
VDD-ON
Turn-On Threshold Voltage
VDD-OFF
Turn-Off Threshold Voltage
IDD-OP
Operating Current
IDD-ST
Startup Current
VVDD-OVP VDD Over-Voltage Protection Level
GATE SECTION
CL=1 nF, f=fMAX-CC
VDD=VDD-ON1.6 V
VOL Output Voltage Low
TA=25°C, VDD=20 V,
IDD_GATE=1 mA
VOH
ISOURCE
ISINK
tR
Output Voltage High
Peak Sourcing Current(5)
Peak Sinking Current(5)
Rising Time
tF Falling Time
VCLAMP
Output Clamp Voltage
HV STARTUP SECTION
TA=25°C, VDD=10 V,
IDD=1 mA
VDD=10 ~ 20 V
VDD=10 ~ 20 V
TA=25°C, VDD=15 V,
CLOAD =1 nF
TA=25°C, VDD=15 V,
CLOAD=1 nF
VDD=20 V, VCS=0 V,
VVS=0 V, VCOM=0 V
IHV
IHV-LC
tR-JFET
Supply Current From HV Pin
Leakage Current after Startup
JFET Regulation Time after
Startup(5)
TA=25°C, VIN=90 VAC,
VDD =0 V
TA=25°C
VJFET-HL JFET Regulation High Limit Voltage
VJFET-LL
JFET Regulation Low Limit Voltage
CURRENT-ERROR-AMPLIFIER SECTION
gM Transconductance(5)
TA=25°C
ICOMI-SINK COMI Sink Current
TA=25°C, VEAI=2.55 V,
VCOMI=5 V
ICOMI-SOURCE |COMI Source Current|
TA=25°C, VEAI=0.45 V,
VCOMI=0 V
VCOMI-HGH COMI High Voltage
VEAI=0 V
VCOMI-LOW
VCOMI_INT.CLP
tCOMI_INT.CLP
COMI Low Voltage
Initial COMI Clamping Voltage(5)
Time for Initial COMI Clamping(5)
VEAI=5 V
Min.
14.5
6.75
3
23
Typ.
16.0
7.75
4
30
24
Max.
17.5
8.75
5
50
25
Unit
V
V
mA
μA
V
1.5 V
5V
-60 mA
180 mA
100 150 200
ns
20 60 100 ns
12 15 18
V
9
1 10
190 250 310
17.5 19.0 20.5
11.5 13.0 14.5
mA
μA
ms
V
V
11 17 23 μmho
12 18 24 μA
12 18 24 μA
4.7 V
0.1 V
1.2 V
15 ms
Continued on the following page…
© 2014 Fairchild Semiconductor Corporation
FL7733AMX Rev. 1.2
5
www.fairchildsemi.com

5 Page





FL7733A arduino
Short-LED Protection (SLP)
In case of a short-LED condition, the secondary diode is
stressed by high current. When VS voltage is lower than
0.3 V due to a short-LED condition, the cycle-by-cycle
current limit level changes to 0.2 V from 1.0 V and SLP
is triggered if the VS voltage is less than 0.3 V for four
(4) consecutive switching cycles. Figure 24 and Figure
25 show the SLP block and operational waveforms
during LED-short condition. To set enough auto-restart
time for system safety under protection conditions, VDD
is maintained between 13 V and 19 V, which is higher
than UVLO, for 250 ms after VDD-ON. SLP is disabled for
an initial 15 ms to ensure successful startup in normal
LED condition.
VDD
19 V /
13 V
-
+
250 ms
Timer
VDD
Good
SLP is disabled
for initial 15 ms
15 ms
Timer
16 V /
7.75 V
SLP
S/H
0.3 V
8 HV
4 VDD
5 VS
Figure 24. Internal SLP Block
LED short
VIN
VDD
19 V /
13 V
-
+
250 ms
Timer
VDD
Good
8 HV
16 V /
7.75 V
4 VDD
VDD OVP
VDD-OVP
VS OVP
EAV
VS-OVP
S/H
5 VS
Figure 26. Internal OVP Block
VOUT
VDD-OVP x
Ns
Na
LED Open
EAV
3V
VDD
VDD-OVP
VD1D9OVN
13 V
VDD OFF
Gate
250 ms JFET regulation
VCS
0.2 V
VDD
19 V
VDD-ON
13 V
VDD OFF
250 ms JFET regulation
Gate
15 ms
15 ms
Figure 25. Waveforms in Short-LED Condition
Open-LED Protection
FL7733A protects external components, such as output
diodes and output capacitors, during open-LED
condition. During switch turn-off, the auxiliary winding
voltage is applied as the reflected output voltage.
Because the VDD and VS voltages have output voltage
information through the auxiliary winding, the internal
voltage comparators in the VDD and VS pins can trigger
output Over-Voltage Protection (OVP), as shown in
Figure 26 and Figure 27.
Figure 27. Waveforms in LED Open Condition
Sensing Resistor Short Protection (SRSP)
In a sensing resistor short condition, the VCS level is
almost zero and pulse-by-pulse current limit or OCP is
not effective. The FL7733A is designed to provide
sensing resistor short protection for both current and
voltage mode operation. If the VCS level is less than
0.1 V in the first switching cycle, the GATE output is
stopped by current-mode SRSP. After 20 ms startup
time, the GATE is shut down by the voltage-mode
SRSP if VCS level is less than 0.1 V at over 60% level of
peak VIN.
Under-Voltage Lockout (UVLO)
The VDD turn-on and turn-off thresholds are fixed
internally at 16 V and 7.75 V, respectively. During
startup, the VDD capacitor must be charged to 16 V
through the high-voltage JFET to enable the FL7733A.
The VDD capacitor continues to supply VDD until auxiliary
power is delivered from the auxiliary winding of the main
transformer. VDD should remain higher than 7.75 V
during this startup process. Therefore, the VDD capacitor
must be adequate to keep VDD over the UVLO threshold
until the auxiliary winding voltage is above 7.75 V.
© 2014 Fairchild Semiconductor Corporation
FL7733AMX Rev. 1.2
11
www.fairchildsemi.com

11 Page







PáginasTotal 14 Páginas
PDF Descargar[ Datasheet FL7733A.PDF ]




Hoja de datos destacado

Número de piezaDescripciónFabricantes
FL7733Primary-Side-Regulated LED DriverFairchild Semiconductor
Fairchild Semiconductor
FL7733APrimary-Side-Regulated LED DriverFairchild Semiconductor
Fairchild Semiconductor
FL7733AMXPrimary-Side-Regulated LED DriverFairchild Semiconductor
Fairchild Semiconductor
FL7733MXPrimary-Side-Regulated LED DriverFairchild Semiconductor
Fairchild Semiconductor

Número de piezaDescripciónFabricantes
SLA6805M

High Voltage 3 phase Motor Driver IC.

Sanken
Sanken
SDC1742

12- and 14-Bit Hybrid Synchro / Resolver-to-Digital Converters.

Analog Devices
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,
permitiéndote verlos en linea o descargarlos en PDF.


DataSheet.es    |   2020   |  Privacy Policy  |  Contacto  |  Buscar