|
|
PDF FSL126HR Data sheet ( Hoja de datos )
| Número de pieza | FSL126HR | |
| Descripción | Green Mode Fairchild Power Switch | |
| Fabricantes | Fairchild Semiconductor | |
| Logotipo |  |
|
Hay una vista previa y un enlace de descarga de FSL126HR (archivo pdf) en la parte inferior de esta página. Total 13 Páginas | ||
|
No Preview Available !
March 20111
FSL126HR
Green Mode Fairchild Power Switch (FPS™)
Features
Internal Avalanche-Rugged SenseFET (650V)
Under 50mW Standby Power Consumption at
265VAC, No-load Condition with Burst Mode
Precision Fixed Operating Frequency with
Frequency Modulation for Attenuating EMI
Internal Startup Circuit
Built-in Soft-Start: 20ms
Pulse-by-Pulse Current Limiting
Various Protections: Over-Voltage Protection
(OVP), Overload Protection (OLP), Output-Short
Protection (OSP), Abnormal Over-Current
Protection (AOCP), Internal Thermal Shutdown
Function with Hysteresis (TSD)
Auto-Restart Mode
Under-Voltage Lockout (UVLO)
Low Operating Current: 1.8mA
Adjustable Peak Current Limit
Applications
SMPS for VCR, STB, DVD, & DVCD Players
SMPS for Home Appliance
Adapter
Related Resources
AN-4137 — Design Guidelines for Off-line Flyback
Converters using FPS™
AN-4141 — Troubleshooting and Design Tips for
Fairchild Power Switch (FPS™) Flyback
Applications
AN-4147 —-Design Guidelines for RCD Snubber of
Flyback
Description
The FSL126HR integrated Pulse Width Modulator
(PWM) and SenseFET is specifically designed for high-
performance offline Switch-Mode Power Supplies
(SMPS) with minimal external components. FSL126HR
includes integrated high-voltage power switching
regulators that combine an avalanche-rugged
SenseFET with a current-mode PWM control block.
The integrated PWM controller includes: Under-Voltage
Lockout (UVLO) protection, Leading-Edge Blanking
(LEB), a frequency generator for EMI attenuation, an
optimized gate turn-on/turn-off driver, Thermal
Shutdown (TSD) protection, and temperature-
compensated precision current sources for loop
compensation and fault protection circuitry. The
FSL126HR offers good soft-start performance. When
compared to a discrete MOSFET and controller or RCC
switching converter solution, the FSL126HR reduces
total component count, design size, and weight; while
increasing efficiency, productivity, and system reliability.
This device provides a basic platform that is well suited
for the design of cost-effective flyback converters.
Maximum Output Power(1)
230VAC ± 15%(2)
85-265VAC
Adapter(3)
Open
Frame
Adapter(3)
Open
Frame
15W
21W
12W
17W
Notes:
1. The junction temperature can limit the maximum
output power.
2. 230VAC or 100/115VAC with doubler.
3. Typical continuous power in a non-ventilated
enclosed adapter measured at 50C ambient.
www.DataSheet4U.com
Ordering Information
Part Number
FSL126HR
Operating
Temperature Range
-40 to 105°C
Top Mark
Package
Packing Method
FSL126HR 8-Lead, Dual Inline Package (DIP)
Rail
© 2011 Fairchild Semiconductor Corporation
FSL126HR • Rev. 1.0.0
www.fairchildsemi.com
1 page  
Electrical Characteristics
TA = 25C unless otherwise specified.
Symbol
Parameter
Conditions
Min. Typ. Max. Units
SenseFET Section
BVDSS
IDSS
RDS(ON)
CISS
COSS
CRSS
td(ON)
tr
td(OFF)
tf
Drain-Source Breakdown Voltage
Zero Gate Voltage Drain Current
Drain-Source On-State Resistance
Input Capacitance
Output Capacitance
Reverse Transfer Capacitance
Turn-On Delay
Rise Time
Turn-Off Delay
Fall Time
Control Section
fOSC
∆fOSC
fFM
DMAX
DMIN
VSTART
VSTOP
IFB
tS/S
Switching Frequency
Switching Frequency Variation
Frequency Modulation
Maximum Duty Cycle
Minimum Duty Cycle
UVLO Threshold Voltage
Feedback Source Current
Internal Soft-Start Time
Burst Mode Section
VBURH
VBURL
VBUR(HYS)
Burst Mode Voltage
Protection Section
ILIM
tCLD
VSD
IDELAY
VOVP
Peak Current Limit
Current Limit Delay Time(11)
Shutdown Feedback Voltage
Shutdown Delay Current
Over-Voltage Protection Threshold
VCC = 0V, ID = 250µA
VDS = 650V, VGS = 0V
VGS = 10V, VGS = 0V, TC = 25°C
VGS = 0V, VDS = 25V, f = 1MHz
VGS = 0V, VDS = 25V, f = 1MHz
VGS = 0V, VDS = 25V, f = 1MHz
VDD = 350V, ID = 2A
VDD = 350V, ID = 2A
VDD = 350V, ID = 2A
VDD = 350V, ID = 2A
650
4.9
210
33.3
4.1
23
16.4
17.2
23
250
6.2
V
µA
Ω
pF
pF
pF
ns
ns
ns
ns
VDS = 650V, VGS = 0V
VGS = 10V, VGS = 0V, TC = 125°C
VFB = 4V
VFB = 0V
After Turn-On
VFB = 0V
VFB = 4V
90 100 110 KHz
±5 ±10 %
±3 KHz
71 77 83 %
00 0 %
11 12 13
V
78
9
V
320 400 480 µA
15 20 25 ms
TJ = 25°C
0.48 0.60
0.32 0.45
150
0.72
0.58
V
V
mV
TJ = 25°C, di/dt = 300mA/µs
VCC = 15V
VFB = 5V
VFB = 2V
1.32 1.50
200
5.5 6.0
3.5 5.0
22.5 24.0
1.68
6.5
6.5
25.5
A
ns
V
µA
V
tOSP Threshold Time
VOSP
Output-Short Threshold Feedback
Protection(11) Voltage
www.DataShtOeSePt_4FUB .com
Feedback Blanking
Time
VAOCP AOCP Voltage(11)
TSD
HYSTSD
tLEB
Thermal
Shutdown Temperature
Shutdown(11) Hysteresis
Leading-Edge Blanking Time(11)
TJ = 25°C
OSP Triggered When tON<tOSP,
VFB>VOSP and Lasts Longer than
tOSP_FB
TJ = 25°C
1.00 1.35 µs
1.44 1.60
V
2.0 2.5
0.85 1.00
125 137
60
300
1.15
150
µs
V
°C
°C
ns
Continued on the following page…
© 2011 Fairchild Semiconductor Corporation
FSL126HR • Rev. 1.0.0
5
www.fairchildsemi.com
5 Page 
Output-Short Protection (OSP)
If the output is shorted, steep current with extremely
high di/dt can flow through the SenseFET during the
LEB time. Such a steep current brings high-voltage
stress on the drain of SenseFET when turned off. To
protect the device from such an abnormal condition,
OSP detects VFB and SenseFET turn-on time. When the
VFB is higher than 1.6V and the SenseFET turn-on time
is lower than 1.2µs, the FPS recognizes this condition
as an abnormal error and shuts down PWM switching
until VCC reaches VSTART again. An abnormal condition
output is shown in Figure 20.
Switching continues until the feedback voltage drops
below VBURL. At this point, switching stops and the
output voltages start to drop at a rate dependent on the
standby current load. This causes the feedback voltage
to rise. Once it passes VBURH, switching resumes. The
feedback voltage then falls and the process repeats.
Burst mode alternately enables and disables switching
of the SenseFET and reduces switching loss in standby
mode.
Figure 20. Output Short Waveforms (OSP)
Soft-Start
The FPS has an internal soft-start circuit that slowly
increases the feedback voltage, together with the
SenseFET current, after it starts. The typical soft-start
time is 20ms, as shown in Figure 21, where progressive
increments of the SenseFET current are allowed during
the startup phase. The pulse width to the power
switching device is progressively increased to establish
the correct working conditions for transformers,
inductors, and capacitors. The voltage on the output
capacitors is progressively increased with the intention
of smoothly establishing the required output voltage.
Soft-start helps to prevent transformer saturation and
reduce the stress on the secondary diode.
Figure 22. Burst-Mode Operation
Adjusting Peak Current Limit
As shown in Figure 23, a combined 6kΩ internal
resistance is connected to the non-inverting lead on the
PWM comparator. An external resistance of Rx on the
current limit pin forms a parallel resistance with the 6kΩ
when the internal diodes are biased by the main current
source of 400µA. For example, FSL126HR has a typical
SenseFET peak current limit (ILIM) of 1.5A. ILIM can be
adjusted to 1A by inserting Rx between the IPK pin and
the ground. The value of the Rx can be estimated by the
following equations:
1.5A:1A 6kΩ: XkΩ
(1)
X Rx || 6kΩ
where X is the resistance of the parallel network.
(2)
www.DataSheet4U.comFigure 21. Internal Soft-Start
Burst Operation
To minimize power dissipation in standby mode, the
FPS enters burst mode. As the load decreases, the
feedback voltage decreases. As shown in Figure 22, the
device automatically enters burst mode when the
feedback voltage drops below VBURH.
© 2011 Fairchild Semiconductor Corporation
FSL126HR • Rev. 1.0.0
Figure 23. Peak Current Limit Adjustment
www.fairchildsemi.com
11
11 Page | ||
| Páginas | Total 13 Páginas | |
| PDF Descargar | [ Datasheet FSL126HR.PDF ] | |
Hoja de datos destacado
| Número de pieza | Descripción | Fabricantes |
| FSL126HR | Green Mode Fairchild Power Switch | 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 |