OB3392K+Datasheet_钜豪照明_131008

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ratings” may cause permanent damage to the device. These are stress ratings only, functional operation of the device at these or any other conditions beyond those indicated under “recommended operating conditions” is not implied. Exposure to absolute maximum-rated conditions for extended periods may affect device reliability.
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Gate driver output for power MOSFET. Current sensing terminal. Loop compensation pin. A capacitor is connected between CMP and GND.
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CMP=4.2V CS>0.15V CS<=0.15V CMP=4.2V Iout=10mA Iout=10mA Cl=1nF Cl=1nF -5-
FB Input Section
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Maximum Working Frequency Maximum Off Time Minimum Off Time
otherwise noted.
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OB3392K
High PF, High Precision Offline LED Lighting Controller
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Package M:SOT23-6
Ordering Information Part Number Description OB3392KMP SOT23-6, Pb-free, T&R Note: All Devices are offered in Pb-free Package
High PF, High Precision Offline LED Lighting Controller
OB3392K
GENERAL DESCRIPTION
OB3392K is an offline LED lighting controller with primary side control, high power factor and high constant current (CC) precision, which can achieve low system cost for an isolated lighting application in a single stage converter. It significantly simplifies the LED lighting system design by eliminating the secondary side feedback components and the opto-coupler. The proprietary CC control scheme is used and the system can achieve high power factor with constant on-time control scheme. Quasi-resonant (QR) operation and clamping frequency greatly improves the system efficiency. The constant output current is compensated for tolerance of transformer inductance variation. And the line compensation and load compensation are built in OB3392K for high precisely constant output current control. OB3392K offers comprehensive protection coverage with auto-recovery features including LED open loop protection, LED short circuit protection, cycle-by-cycle current limiting, built-in leading edge blanking, VDD under voltage lockout (UVLO), etc. OB3392K is offered in SOT23-6 package.
AVDD OVP
Inner OTP
Reference
FB
Demag detect
QR
OUT OVP POR OVP
fmax
R
Q
S
Q
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Line Compensatio n/load Compensatio n
vref
gm
Vc
CC Control
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dem
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OCP LEB CS GND
-
cmp
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CMP
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Preliminary Datasheet OB_DOC_DS_3392K00
Timer
ramp
Logic control
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Drive
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GATE
OUT OVP
OUT OVP
POR
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Maximum On Time Error Amplifier Voltage
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Error Amplifier Section Vref Gm
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Preliminary Datasheet OB_DOC_DS_3392K00
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High PF, High Precision Offline LED Lighting Controller
OB3392K
BLOCK DIAGRAM
VDD
UVLO VDD OVP dem
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High PF, High Precision Offline LED Lighting Controller
OB3392K
GENERAL INFORMATION
Pin Configuration The pin map is shown as below for SOT23-6.
Package Dissipation Rating Package RθJA (℃/W) SOT23-6 200 Absolute Maximum Ratings Parameter Value VDD Voltage -0.3 to 40V Gate Voltage -0.3 to 13V CS Input Voltage -0.3 to 7V FB Input Voltage -0.3 to 7V COMP Voltage -0.3 to 7V Min/Max Operating -40 to 150 ℃ Junction Temperature TJ Min/Max Storage -55 to 150 ℃ Temperature Tstg Lead Temperature 260 ℃ (Soldering, 10secs) Note: Stresses beyond those listed under “absolute maximum
Marking Information
TERMINAL ASSIGNMENTS
Pin Num 1 2 3 4 5 6 Pin Name FB GND VDD GATE CS CMP I/O I P P O I O Description
Voltage feedback from auxiliary winding. Connected to resistor divider from auxiliary winding reflecting output voltage. Power Ground. Power supply Input.
1.5 25.5 9 35
2.2 27
Current Sense Input Section FB>0.45V FB<0.45V
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0.95
Vout_ovp Vout_scp QR Section Fmax Toff_max Toff_min Ton_max
Output Over Voltage Protection Output Short Circuit Protection
TYPICAL APPLICATION
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APPLICATIONS
LED lighting
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Preliminary Datasheet OB_DOC_DS_3392K00