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부품번호 | SCY99194 기능 |
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기능 | Fixed Frequency Current Mode Controller | ||
제조업체 | ON Semiconductor | ||
로고 | |||
SCY99194
Fixed Frequency Current
Mode Controller for Flyback
Converters
The SCY99194 is a new fixed−frequency current−mode controller
featuring the Dynamic Self−Supply. This function greatly simplifies
the design of the auxiliary supply and the VCC capacitor by activating
the internal startup current source to supply the controller during
start−up, transients, latch, stand−by etc. This device contains a special
HV detector which detect the application unplug from the AC input
line and triggers the X2 discharge current.
It features a timer−based fault detection that ensures the detection of
overload and an adjustable compensation to help keep the maximum
power independent of the input voltage.
Due to frequency foldback, the controller exhibits excellent
efficiency in light load condition while still achieving very low
standby power consumption. Internal frequency jittering, ramp
compensation, and a versatile latch input make this controller an
excellent candidate for the robust power supply designs.
A dedicated Off mode allows to reach the extremely low no load
input power consumption via “sleeping” whole device and thus
minimize the power consumption of the control circuitry.
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MARKING
DIAGRAM
SOIC−7
CASE 751U
8
DAP041
ALYWX
G
1
DAP041 = Specific Device Code
A = Assembly Location
L = Wafer Lot
Y = Year
W = Work Week
G = Pb−Free Package
PIN CONNECTIONS
Features
Latch 1
8 HV
• Fixed−Frequency Current−Mode Operation (65 kHz Switching
Frequency)
• Frequency Foldback then Skip Mode for Maximized Performance in
Light Load and Standby Conditions
FB 2
CS 3
GND 4
6 VCC
5 DRV
• Timer−Based Overload Protection with Latched (Option A) or
(Top View)
Auto−Recovery (Option B) Operation
• High−voltage Current Source with Dynamic Self−Supply,
ORDERING INFORMATION
Simplifying the Design of the VCC Circuitry
• Frequency Modulation for Softened EMI Signature
See detailed ordering and shipping information in the package
dimensions section on page 39 of this data sheet.
• Adjustable Overpower Protection Dependant on the Bulk Voltage
• Latch−off Input Combined with the Overpower Protection Sensing
Input
• VCC Operation up to 28 V, With Overvoltage Detection
• 500/800 mA Source/Sink Drive Peak Current
Capability
• 10 ms Soft−Start
Typical Applications
• AC−DC Adapters for Notebooks, LCD, and Printers
• Offline Battery Chargers
• Internal Thermal Shutdown
• No−Load Standby Power < 30 mW
• X2 Capacitor in EMI Filter Discharging Feature
• Consumer Electronic Power Supplies
• Auxiliary/Housekeeping Power Supplies
• Offline Adapters for Notebooks
• These Devices are Pb−Free and Halogen Free/BFR Free
© Semiconductor Components Industries, LLC, 2014
December, 2014 − Rev. 0
1
Publication Order Number:
SCY99194/D
SCY99194
MAXIMUM RATINGS
Rating
Symbol
Value
Unit
DRV Maximum voltage on DRV pin
(pin 5) (Dc−Current self−limited if operated within the allowed range) (Note 1)
–0.3 to 20
±1000 (peak)
V
mA
VCC
(pin 6)
HV
(pin 8)
VCCPower Supply voltage, VCC pin, continuous voltage
Power Supply voltage, VCC pin, continuous voltage (Note 1)
Maximum voltage on HV pin
(Dc−Current self−limited if operated within the allowed range)
–0.3 to 28
±30 (peak)
–0.3 to 500
±20
V
mA
V
mA
Vmax
Maximum voltage on low power pins (except pin 5, pin 6 and pin 8)
(Dc−Current self−limited if operated within the allowed range) (Note 1)
–0.3 to 10
±10 (peak)
V
mA
RqJ−A
Thermal Resistance SOIC−7
Junction-to-Air, low conductivity PCB (Note 2)
Junction-to-Air, medium conductivity PCB (Note 3)
Junction-to-Air, high conductivity PCB (Note 4)
°C/W
162
147
115
RqJ−C Thermal Resistance Junction−to−Case
TJMAX Operating Junction Temperature
TSTRGMAX Storage Temperature Range
ESD Capability, HBM model (All pins except HV) per JEDEC Standard JESD22,
Method A114E
73
−40 to +150
−60 to +150
> 2000
°C/W
°C
°C
V
ESD Capability, Machine Model per JEDEC Standard JESD22, Method A115A
> 200
V
ESD Capability, Charged Device Model per JEDEC Standard JESD22, Method C101E
> 1000
V
Stresses exceeding Maximum Ratings may damage the device. Maximum Ratings are stress ratings only. Functional operation above the
Recommended Operating Conditions is not implied. Extended exposure to stresses above the Recommended Operating Conditions may affect
device reliability.
1. This device contains latch-up protection and exceeds 100 mA per JEDEC Standard JESD78.
2. As mounted on a 80 x 100 x 1.5 mm FR4 substrate with a single layer of 50 mm2 of 2 oz copper traces and heat spreading area. As specified
for a JEDEC 51-1 conductivity test PCB. Test conditions were under natural convection or zero air flow.
3. As mounted on a 80 x 100 x 1.5 mm FR4 substrate with a single layer of 100 mm2 of 2 oz copper traces and heat spreading area. As specified
for a JEDEC 51-2 conductivity test PCB. Test conditions were under natural convection or zero air flow.
4. As mounted on a 80 x 100 x 1.5 mm FR4 substrate with a single layer of 650 mm2 of 2 oz copper traces and heat spreading area. As specified
for a JEDEC 51-3 conductivity test PCB. Test conditions were under natural convection or zero air flow.
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4
4페이지 SCY99194
ELECTRICAL CHARACTERISTICS (For typical values TJ = 25°C, for min/max values TJ = −40°C to +125°C, VHV = 125 V,
VCC = 11 V unless otherwise noted)
Characteristics
Test Condition
Symbol
Min Typ Max
REMOTE CONTROL ON FB PIN
Pull−up current in off mode
Go To Off mode timer
OVERLOAD PROTECTION
VCC > VCC(off)
VCC > VCC(off)
IOFF
tGTOM
−5−
500 600 800
Fault timer duration
Autorecovery mode latch−off time duration
OVERPOWER PROTECTION
tfault
tautorec
108 128 178
0.85 1.00 1.35
VHV to IOPC conversion ratio
Current flowing out of CS pin (Note 7)
FB voltage above which IOPC is applied
FB voltage below which is no IOPC applied
LATCH−OFF INPUT
VHV = 125 V
VHV = 162 V
VHV = 325 V
VHV = 365 V
VHV = 365 V
VHV = 365 V
KOPC
IOPC(125)
IOPC(162)
IOPC(325)
IOPC(365)
VFB(OPCF)
VFB(OPCE)
−
−
−
−
105
2.12
−
0.54
0
20
110
130
2.35
2.15
−
−
−
−
150
2.58
−
High threshold
Low threshold
Current source for direct NTC connection
During normal operation
During soft−start
Blanking duration on high latch detection
Blanking duration on low latch detection
Clamping voltage
VLatch going up
VLatch going down
VLatch = 0 V
ILatch = 0 mA
ILatch = 1 mA
VOVP
VOTP
2.35 2.5 2.65
0.76 0.8 0.84
INTC
65 95 105
INTC(SSTART)
130
190
210
tLatch(OVP)
35
50
70
tLatch(OTP) − 350 −
Vclamp0(Latch)
1.0
1.2
1.4
Vclamp1(Latch)
1.8
2.4
3.0
TEMPERATURE SHUTDOWN
Temperature shutdown
TJ going up
TTSD
− 150 −
Temperature shutdown hysteresis
TJ going down
TTSD(HYS)
−
30
−
5. Internal supply current only, currents sourced via FB pin is not included (current is flowing in GND pin only).
6. Guaranteed by design.
7. CS pin source current is a sum of Ibias and IOPC, thus at VHV = 125 V is observed the Ibias only, because IOPC is switched off.
Unit
mA
ms
ms
s
mA / V
mA
V
V
V
V
mA
ms
ms
V
°C
°C
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부품번호 | 상세설명 및 기능 | 제조사 |
SCY99194 | Fixed Frequency Current Mode Controller | ON Semiconductor |
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