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PDF SD686X Data sheet ( Hoja de datos )
| Número de pieza | SD686X | |
| Descripción | CURRENT MODE PWM+PFM CONTROLLER | |
| Fabricantes | SILAN MICROELECTRONICS | |
| Logotipo |  |
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Hay una vista previa y un enlace de descarga de SD686X (archivo pdf) en la parte inferior de esta página. Total 10 Páginas | ||
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SD686X
CURRENT MODE PWM+PFM CONTROLLER WITH BUILT-IN HIGH VOLTAGE
MOSFET
DESCRIPTION
SD686X is current mode PWM+PFM controller with built-in high-
voltage MOSFET used for SWPS, with low standby power and low
start current for power switch. In standby mode, the circuit enters
burst mode to reduce the standby power dissipation. The switch
frequency is 25~67KHz with jitter frequency for low EMI.
Built-in peak current compensation circuit makes the limit output
power stable even with different input AC voltage. Limit output
power can be adjusted through the resistor. Maximum peak current
compensation during power-on reduces pressure on transformer to
DIP-8-300-2.54
avoid saturation, the peak current compensation will decrease for
balance after power-on.
It integrates various protections such as undervoltage lockout,
overvoltage protection, overload protection, lead edge blanking,
primary winding overcurrent protection and thermal shutdown. The
circuit will restart until normal if protection occurs.
APPLICATIONS
FEATURES
* SWPS
* Energy Star 2.0 standard
* Lower start-up current (3µA)
* Various switching frequency following load for the higher
efficiency
* Frequency jitter for low EMI
* Overvoltage, overcurrent, overload and over temperature
protections.
* Adjustable limit output power
* Undervoltage lockout
* Built-in high voltage MOSFET
* Auto restart mode
* Peak current compensation
* Maximum peak current compensation for initialization
* Burst mode
* Cycle by cycle current limit
HANGZHOU SILAN MICROELECTRONICS CO.,LTD
Http://www.silan.com.cn
REV:1.0
2010.03.12
Page 1 of 10
http://www.Datasheet4U.com
1 page  
SD686X
Characteristics
Oscillator Section
Symbol
Test conditions
Min.
Max. Oscillate Frequency
Min. Oscillate Frequency
fOSCMAX VFB=3V
fOSCMIN VBURL<VFB<VBURH
61
20
Frequency jitter
fMOD
Oscillate frequency is the
maximum
--
Frequency Change With
Temperature
-- 25°C≤Tamb≤+85°C
--
Maximum Duty cycle
Feedback Section
DMAX
72
Feedback Source Current
IFB VFB=0V, RADJ=0
0.8
Shutdown Feedback Voltage
(over load protection)
VSD
3.8
Shutdown Feedback Delay Time
FB is increased to 5V from 0V
TSD 15
instantly
Shutdown Delay Current
Limit Output power
FB current 1
Min. Resistor For Limit Output
Power Adjust
Current Limit
IDELAY VFB=5V
3
IFB1
RADJ
VFB=0V, RADJ=100KΩ
VFB=0V, FB current
decreased
0.60
is
14
SD6860
0.53
SD6861
0.67
Peak Current Limit SD6862
IOVER Max. inductor current
0.80
SD6863
1.10
Burst mode
SD6864
1.35
Burst Mode High Voltage
VBURH FB voltage
0.40
Burst Mode Low Voltage
Protection Section
VBURL FB voltage
0.25
Overvoltage Protection
VOVP VCC voltage
22
Over temperature protection
TOTP
125
Quit over temperature protection TOTU
80
Leading-edge Blanking Time
Total Standby Current
TLEB
350
Start Current
ISTART VCC increases from 0V to 12V --
Quiescent Current
ISTATIC V FB=0V
1.0
SD6860
1.0
SD6861
1.0
Operating Current SD6862
IOP VFB=3V
1.2
SD6863
1.2
SD6864
1.4
Typ.
67
25
±2.5
±5
77
0.9
4.3
5.5
0.69
20
0.60
0.75
0.90
1.20
1.50
0.50
0.35
24
160
100
650
3
1.9
2.0
2.0
2.2
2.2
2.4
Max.
73
30
±3.5
±10
82
1.0
4.8
40
8
0.78
28
0.67
0.83
1.00
1.30
1.65
0.60
0.45
26
--
120
--
10
3.0
3.0
3.0
3.2
3.2
3.4
Unit
KHz
KHz
KHz
%
%
mA
V
ms
µA
mA
KΩ
A
V
V
V
°C
°C
ns
µA
mA
mA
mA
mA
mA
mA
HANGZHOU SILAN MICROELECTRONICS CO.,LTD
Http://www.silan.com.cn
REV:1.0
2010.03.12
Page 5 of 10
5 Page | ||
| Páginas | Total 10 Páginas | |
| PDF Descargar | [ Datasheet SD686X.PDF ] | |
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