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PDF FS6830 Data sheet ( Hoja de datos )
| Número de pieza | FS6830 | |
| Descripción | Low Standby Power High Performance PWM Controller | |
| Fabricantes | American First Semiconductor | |
| Logotipo |  |
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Low Standby Power High Performance PWM Controller
FS6830
General Description
FS6830 is a highly integrated current mode PWM control IC optimized for high performance,
low standby power and cost effective offline flyback converter applications in sub 40W range.
PWM switching frequency at normal operation is externally programmable and trimmed to tight
range. At no load or light load condition, the IC operates in extended ‘burst mode’ to minimize
switching loss. Lower standby power and higher conversion efficiency is thus achieved.
The internal slope compensation improves system large signal stability and reduces the
possible sub-harmonic oscillation at high PWM duty cycle output. Leading-edge blanking on
current sense(CS) input removes the signal glitch due to snubber circuit diode reverse recovery and
thus greatly reduces the external component count and system cost in the design.
FS6830 offers complete protection coverage with automatic self-recovery feature including
Cycle-by-Cycle current limiting (OCP), over load protection (OLP), VDD over voltage clamp and
under voltage lockout (UVLO). The Gate-drive output is clamped to maximum 18V to protect the
power MOSFET. Excellent EMI performance is achieved with frequency shuffling technique
together with soft switching control at the totem pole gate drive output. FS6830 is offered in
SOT23-6 package.
Applications
Battery Charger
Power Adaptor for PDA and Digital Camera
Set-Top Box Power Supplies
Open-frame SMPS
Features
Optimized for Sub 40W Applications
Frequency Shuffling for Improved EMI
Extended Burst Mode for Improved Efficiency and Low Standby Power
Audio Noise Free Operation
External Programmable PWM Switching Frequency
Internal Synchronized Slope Compensation
Low VDD Startup Current and Low Operating Current
Leading Edge Blanking on Current Sense Input
Over Load Protection(OLP) and Cycle-by-Cycle Current Limiting Protection(OCP)
VDD Over Voltage Protection(OVP),Under Voltage Lockout Protection(UVLO) and Over
Voltage Clamp
Gate Output Maximum Voltage Clamp (18V)
Pb-free SOT23-6 Package
@ 2010 Copyright By American First Semiconductor
Page 1/9
1 page  
FS6830
Electrical Characteristics
TA=25℃,VDD=16V, unless otherwise noted.
Symbol
IDD_ST
IOP
VDD_ST
VUVLO
VDD_CLAMP
VFB_OPEN
IFB_SHORT
VTH_0D
VTH_PL
TLEB
ZSENSE_IN
VTH_OC
TD_OC
FOSC
DMAX
FBURST
ΔFOSC
RIRANGE
VRI_OPEN
VOL
VOH
Tr
Tf
Description
VDD Start up Current
Operation Current
VDD Under Voltage
Lockout Enter
VDD Under Voltage Lockout
Exit
VDD Zener Clamp Voltage
VFB Open Loop
Voltage
FB pin short circuit current
Zero Duty Cycle FB
Threshold Voltage
Power Limiting FB
Threshold Voltage
Leading edge
blanking time
Input Impedance
Over Current Threshold
Voltage at zero Duty Cycle
Over Current Detection and
Control Delay
Normal Oscillation
Frequency
Maximum Duty Cycle
Burst Mode Base Frequency
Frequency Modulation range
Operating RI Range
RI open load voltage
Output Low Level
Output High Level
Output Rising Time
Output Falling Time
Test Conditions
VDD=12.5V，RI=100KΩ，
Measure current into VDD
VDD=16V,VFB=3V，RI=100KΩ
VDD Rise
VDD Fall
IDD=10mA
VDD=16V
VDD=16V，Short FB to GND
VDD=16V，RI=100KΩ，
FB Fall until gate off
VDD=16V，RI=100KΩ，
FB Fall until gate off
VDD=16V，RI=100KΩ，
FB Rise until gate off
VDD=16V ，RI=100KΩ，
SENSE Rise until gate off
VDD=16V ，VFB=3.0V，
VCS> VTH_OC，RI=100KΩ
VDD=16V ，VFB=3.0V，
VCS=0V，RI=100KΩ
VDD=16V ，VFB=3.0V，
VCS=0V，RI=100KΩ
RI=100KΩ
VDD=16V，IO=-20mA
VDD=16V，IO=20mA
VDD=16V，CLOAD=1nF
VDD=16V，CLOAD=1nF
MIN
13
7.8
0.70
60
-3
50
10
Value
TYP MAX
3 20
1.4
14 15
8.8 9.8
34
4.8
1.2
0.75
3.7
300
40
0.75 0.80
75
65 70
75
22
3
100 150
2
0.8
220
70
Units
uA
mA
V
V
V
V
mA
V
V
nS
KΩ
V
nS
KHz
%
KHz
%
KΩ
V
V
V
nS
nS
www.First-semi.com
Page 5/9
5 Page | ||
| Páginas | Total 9 Páginas | |
| PDF Descargar | [ Datasheet FS6830.PDF ] | |
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