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SN03A Datasheet PDF - On-Bright

Part Number SN03A
Description High Power Factor Flyback PWM Controller
Manufacturers On-Bright 
Logo On-Bright Logo 



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SN03A datasheet, circuit
SN03A
High Power Factor Flyback PWM Controller
GENERAL DESCRIPTION
SN03A is a high power factor flyback PWM
controller special for lighting applications.
SN03A features an internal start-up timer for
stand-alone applications, an analog multiplier with
for power factor correction (PFC), zero current
detector (ZCD) to ensure TM operation, a current
sensing comparator with built-in leading-edge
blanking, and a totem pole output ideally suited for
driving a power MOSFET.
SN03A offers great protection coverage including
system VCC under voltage lockout (UVLO),VCC
over voltage protection, Cycle-by-cycle current
limiting, and gate drive output clamping for
external power MOSFET protection.
Product Specification
FEATURES
Low Start-up Current and Operating Current
Cycle-by-Cycle Current Limiting
Internal Leading Edge Blanking
Analog multiplier for Power Factor Correction
Internal Startup Timer for Stand-alone
Applications
Trimmed 1.5% Internal Band gap Reference
Under Voltage Lockout with Hysteresis
VCC over voltage protection
Transition Mode (TM) Operation
Totem Pole Output with High State Clamping
Audio Noise Free
11V to 32V wide range of VCC voltage
APPLICATIONS
Single Stage High PF Flyback AC/DC SMPS
LED Lighting Power
TYPICAL APPLICATION
©On-Bright Electronics
Confidential
-1-
Preliminary Datasheet
OB_DOC_DS_SN03A00

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SN03A equivalent
SN03A
High Power Factor Flyback PWM Controller
ELECTRICAL CHARACTERISTICS
(TA = 25℃ if not otherwise noted)
Symbol Pin Parameter
SUPPLY VOLTAGE SECTION
Vcc 8 Operating Range
UVLO(OFF) 8
VCC under voltage
lockout exit
UVLO(ON) 8
VCC under voltage
lockout enter
Hys 8 Hysteresis
Vz
8
VCC Zener
Voltage
Clamp
Vcc_ovp 8 VCC OVP threshold
SUPPLY CURRENT SECTION
Icc-start 8 Start-up Current
Iq
8
Quiescent Current,
Switching
No
Icc 8 Operating Supply Current
Test Conditions
After Turn On
Icc=5mA
Vcc=11V
Vcc=14.5V
GD=1nf @ 70kHz
ERROR AMPLIFIER SECTION
VREF
1 EA Reference
Gv Voltage Gain
Vcc=14.5V
Open Loop
Gb Gain Bandwidth
ICOMP
VCOMP
2
2
Source Current
Sink Current
Upper Clamp Voltage
Lower Clamp Voltage
MULTIPLIER SECTION
Vmult
3 Linear Operating Range
ΔVcs/
ΔVmult
Output Max. Slope
K Gain
CURRENT SENSE COMPARATOR
Vcs
4
Current Sense Reference
Clamp
Td(H-L) 4 Delay to Output
ZERO CURRENT DETECTOR
Vzcd
5
Input Threshold Voltage
Trigger level
Vzcd_hys
ZCD trigger Hysteresis
Vzcd
5 Upper Clamp Voltage
Vzcd
5 Lower Clamp Voltage
Izcd 5 Source Current Capability
Izcd 5 Sink Current Capability
STARTUP TIMER
Tstart
Re-Start Timer Period
GATE DRIVE SECTION
VoL 7 Low Output Voltage
VoH 7 High Output Voltage
Tr 7 Rising Time
Tf 7 Falling Time
Voclamp 7 Output Clamp Voltage
COMP=3.6V, FB=2.4V
COMP=3.6V, FB=2.6V
Isource=0.5mA
Isink=0.2mA
COMP=3.0V
Vmult=from 0 to 0.5V,
COMP=4.9V
Vmult=1V,
COMP=3.5V
Vmult=2.5V
COMP=4.9V
Izcd=2.5mA
Izcd=-2.5mA
Vcc=14.5V, Io=100mA
Vcc=14.5V, Io=100mA
Cl=1000pF, 10~90%
Cl=1000pF, 10~90%
Vcc=28V
Min
11
15.5
8.0
Typ
16.5
8.8
7.7
38
36.5
5
1.8
5
2.45
60
2.5
80
1.2
-2 -6
26
4.9
2.25
0 to 3.5
0.95
1.1
0.28
0.36
0.94
1.0
200
0.25
0.75
5.1 5.7
0
-3
3
45 55
8
80
30
16
Max Unit
32
17.5
V
V
9.6 V
V
V
V
15 uA
3 mA
7 mA
2.55 V
dB
MH
z
-10 mA
10 mA
V
V
0.44
V
V/V
1/V
1.06
450
V
ns
V
V
6.3 V
V
-5 mA
10 mA
65 us
1.5 V
V
150 ns
70 ns
18 V
©On-Bright Electronics
Confidential
-5-
Preliminary Datasheet
OB_DOC_DS_SN03A00

5 Page
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Information Total 10 Pages
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