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D-K381C8 Datasheet Preview

D-K381C8 Datasheet

Non-isolated Quasi-Resonant Buck LED Power Switch

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D-K381C8
Non-isolated Quasi-Resonant Buck LED Power Switch with OVP
FEATURES
Proprietary Output OVP Protection
Integrated with 500V MOSFET
No Auxiliary Winding Needed
Quasi-Resonant for High Efficiency
Built-in Thermal Foldback
Built-in Charging Circuit for Fast Start-Up
±4% CC Regulation
Very Low VDD Operation Current
Built-in AC Line CC Compensation
Build in Protections:
LED Short/Open Protection
On-Chip Thermal Fold-back (OTP)
Cycle-by-Cycle Current Limiting
Leading Edge Blanking (LEB)
Pin Floating Protection
VDD UVLO
Available with SOP8 Package
APPLICATIONS
LED Lighting
TYPICAL APPLICATION CIRCUIT
GENERAL DESCRIPTION
D-K381C8 is a highly integrated power switch
with Quasi-Resonant Buck (QR-Buck) constant
current (CC) control for LED lighting applications.
The IC has built in output Over Voltage
Protection (OVP).
D-K381C8 combines a 500V power MOSFET
switch with a power controller in one chip. The IC
also integrates high voltage startup/IC supply
circuit and a novel transformer demagnetization
circuit, which eliminates transformer auxiliary
winding. The IC adopts Quasi-Resonant control
for high efficiency.
D-K381C8 integrates functions and protections
of Current Limit and Leading Edge Blanking,
Under Voltage Lockout (UVLO), Cycle-by-cycle
Current Limiting (OCP), Thermal Foldback (OTP),
Output OVP, LED Open/Short Protection, etc.
D-K381C8_REV1.0
www.depuw.com
1




DP

D-K381C8 Datasheet Preview

D-K381C8 Datasheet

Non-isolated Quasi-Resonant Buck LED Power Switch

No Preview Available !

D-K381C8
Non-isolated Quasi-Resonant Buck LED Power Switch with OVP
Pin Configuration
Marking Information
K381C8 for product name;
XXXXXX : The first X reresents the last year,2014 is 4; The second X represents the month, in A-L
12 letters;The third and fourth X on behalf of the date, 01-31 said; The last two X represents the
wafer batch code.
Output Power Table
Part Number Package
D-K381C8
SOP8
Output Current for
90-265Vac
36V output 72V output
Output Current for
176-265Vac
150V output 200V output
Minimum
Output
Voltage
180 mA
150 mA
120 mA
100 mA
15V
Pin Description
Pin
Number
Pin Name
I/O
Description
1 NC - No Connection.
2
Rovp
I
Over Voltage Protection Setting Pin. Connect a Resistor to System
GND.
3 NC - No Connection.
4
VDD
P Power Supply Pin of the Chip.
5-6 Drain I Internal Power MOSFET Drain.
7-8 CS P The Ground of the IC. This pin is also used for peak current control.
D-K381C8_REV1.0
www.depuw.com
2


Part Number D-K381C8
Description Non-isolated Quasi-Resonant Buck LED Power Switch
Maker DP
Total Page 9 Pages
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