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PDF FL6632MX Data sheet ( Hoja de datos )
| Número de pieza | FL6632MX | |
| Descripción | Primary-Side-Regulated LED Driver | |
| Fabricantes | Fairchild Semiconductor | |
| Logotipo |  |
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May 2015
FL6632
Primary-Side-Regulated LED Driver with Power Factor
Correction
Features
Cost-Effective Solution: No Input Bulk Capacitor or
Feedback Circuitry
Power Factor Correction
Accurate Constant-Current (CC) Control,
Independent Online Voltage, Output Voltage,
and Magnetizing Inductance Variation
Linear Frequency Control Improves Efficiency and
Simplifies Design
Open-LED Protection
Short-LED Protection
Cycle-by-Cycle Current Limiting
Over-Temperature Protection with Auto Restart
Low Startup Current: 20 μA
Low Operating Current: 5 mA
VDD Under-Voltage Lockout (UVLO)
Gate Output Maximum Voltage Clamped at 18V
SOP-8 Package
Application Voltage Range: 80 VAC ~ 308 VAC
Description
This highly integrated PWM controller provides several
features to enhance the performance of low-power
flyback converters. The proprietary topology enables
simplified circuit design for LED lighting applications.
By using single-stage topology with primary-side
regulation, a LED lighting board can be implemented
with few external components and minimized cost. No
input bulk capacitor or feedback circuitry is required. To
implement good power factor and low THD, constant
on-time control is utilized with an external capacitor
connected to the COMI pin.
Precise constant-current control regulates accurate
output current versus changes in input voltage and
output voltage. The operating frequency is proportionally
adjusted by the output voltage to guarantee DCM
operation with higher efficiency and simpler design.
FL6632 provides open-LED, short-LED, and over-
temperature protection features. The current limit level
is automatically reduced to minimize output current and
protect external components in a short-LED condition.
The FL6632 controller is available in an 8-pin Small-
Outline Package (SOP).
Applications
LED Lighting System
Ordering Information
Part Number
FL6632MX
Operating
Temperature Range
Package
-40°C to +125°C 8-Lead, Small Outline Integrated Circuit Package (SOIC)
Packing
Method
Tape & Reel
© 2015 Fairchild Semiconductor Corporation
FL6632 • Rev. 1.0
www.fairchildsemi.com
1 page  
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
VDD SECTION
VDD-ON
VDD-OFF
Turn-On Threshold Voltage
Turn-Off Threshold Voltage
IDD-OP
Operating Current
IDD-ST
Startup Current
VOVP
VDD Over-Voltage-Protection Level
GATE SECTION
VOL Output Voltage Low
VOH Output Voltage High
Isource
Peak Sourcing Current
Isink Peak Sinking Current
tr Rising Time
tf Falling Time
VCLAMP
Output Clamp Voltage
Oscillator SECTION
fMAX-CC
fMIN-CC
tON(MAX)
Maximum Frequency in CC
Minimum Frequency in CC
Maximum Turn-On Time
CURRENT-ERROR-AMPLIFIER SECTION
VRV Reference Voltage
VCCR
EAI Voltage for CC Regulation
tLEB Leading-Edge Blanking Time
tMIN Minimum On Time in CC
tPD Propagation Delay to GATE
tDIS-BNK
tDIS Blanking Time of VS
IVS-BNK
VS Current for VS Blanking
Current-Error-Amplifier SECTION
Gm Transconductance
ICOMI-SINK
ICOMI-SOURCE
VCOMI-HGH
VCOMI-LOW
COMI Sink Current
|COMI Source Current|
COMI High Voltage
COMI Low Voltage
Conditions
At Maximum Frequency
CL=1 nF
VDD=VDD-ON – 0.16 V
VDD=20 V, IGATE= -1 mA
VDD=10 V, IGATE= +1 mA
VDD=10 ~ 20 V
VDD=10 ~ 20 V
CL=1 nF
CL=1 nF
VDD=10 V, 20 V
VDD=10 V, 20 V
VCS=0.44 V
VCOMI=0 V
VEAI=3 V, VCOMI=5 V
VEAI=2 V, VCOMI=0 V
VEAI=2 V
VEAI=3 V
Min. Typ. Max. Unit
14.5 16.0 17.5
6.75 7.75 8.75
345
2 20
22.0 23.5 25.0
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
60 65 70 kHz
21.0 23.5 26.0 kHz
12 14 16 s
2.475
2.38
50
2.500
2.43
300
600
100
1.5
-100
2.525
2.48
150
V
V
ns
ns
ns
s
A
85 mho
25 38 A
25 38 A
4.9 V
0.1 V
© 2015 Fairchild Semiconductor Corporation
FL6632 • Rev. 1.0
5
www.fairchildsemi.com
5 Page 
LED Open !
VDD
VDD_OVP
VDD_ON
VDD_OFF
VOUT
VDD_OVP x Ns/Na
GATE
Figure 22. Waveforms in Open-LED Condition
Under-Voltage Lockout (UVLO)
The turn-on and turn-off thresholds are fixed internally at
16 V and 7.5 V, respectively. During startup, the VDD
capacitor must be charged to 16 V through the startup
resistor to enable the FL6632. The VDD capacitor
continues to supply VDD until power can be delivered
from the auxiliary winding of the main transformer.
VDD must not drop below 7.5 V during this startup
process. This UVLO hysteresis window ensures that the
VDD capacitor is adequate to supply VDD during startup.
Over-Temperature Protection (OTP)
The FL6632 has a built-in temperature-sensing circuit to
shut down PWM output if the junction temperature
exceeds 150°C. While PWM output is shut down, the
VDD voltage gradually drops to the UVLO voltage. Some
of the internal circuits are shut down and VDD gradually
starts increasing again. When VDD reaches 16 V, all the
internal circuits start operating. If the junction
temperature is still higher than 140°C, the PWM
controller is shut down immediately.
© 2015 Fairchild Semiconductor Corporation
FL6632 • Rev. 1.0
11
www.fairchildsemi.com
11 Page | ||
| Páginas | Total 14 Páginas | |
| PDF Descargar | [ Datasheet FL6632MX.PDF ] | |
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