KP1040
Non-isolated Quasi-Resonant Buck LED Power Switch
FEATURES
GENERAL DESCRIPTION
KP1040 is a highly integrated power switch with
Quasi-Resonant Buck (QR-Buck) constant current
(CC) control for LED lighting applications.
KP1040 combines a 550V 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.
KP1040 integrates functions and protections of
Under Voltage Lockout (UVLO), Cycle-by-cycle
Current Limiting (OCP), Thermal Foldback (OTP),
LED Open/Short Protection, etc.
.
Integrated with 550V 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 Open/Short Protection
On-Chip Thermal Fold-back (OTP)
Cycle-by-Cycle Current Limiting
Leading Edge Blanking (LEB)
Pin Floating Protection
VDD UVLO
Available with SOT89-3 and TO-92 Package
APPLICATIONS
LED Lighting
TYPICAL APPLICATION CIRCUIT
L
AC
Input
N
KP1040
(
SOT89-3/TO-92
)
Drain
2
CS
VDD
©Kiwi Instruments Corp. Confidential
-1-
11/25/2014
DS_KP1040_REV1.0
KP1040
Non-isolated Quasi-Resonant Buck LED Power Switch
Pin Configuration
SOT89-3
TO-92
Marking Information
SOT89-3
TO-92
Output Power Table (for SOT89-3)
LED Output Voltage
40V
60V
176~265VAC
200mA
180mA
85-265VAC
180mA
160mA
Output Power Table (for TO-92)
Min Output Voltage
30V
Max Output Current
150mA
Pin Description
SOT89-3
1
2
3
TO-92
1
3
2
Pin
Name
Drain
VDD
CS
I/O
P
P
P
Description
Internal power MOSFET drain
Power Supply Pin of the Chip.
The Ground of the IC. This pin is also used for peak current
control.
Ordering Information
Part Number
KP1040TPA
KP1040LPA
Description
SOT89-3, ROHS, 2500Pcs/Reel
TO-92, ROHS, 2000Pcs/Box(Tape)
©Kiwi Instruments Corp. Confidential
-2-
11/25/2014
DS_KP1040_REV1.0
KP1040
Non-isolated Quasi-Resonant Buck LED Power Switch
Block Diagram
VDD
On-Chip Thermal
Foldback
Regulator
5.8V
Tdem
Quasi-Resonant Buck
Current Modulator (QR-Buck)
S
Q
R
Power
MOSFET
PWM
Soft Gate
Driver
Drain
PWM
Timer & Logic
Max. Toff
Tdem
Demganitization
Detection
PWM
Fault
Management
Logic
LEB
Comp
VDD
LED Open/Short
Differential
Sampling
0.5V
CS
©Kiwi Instruments Corp. Confidential
-3-
11/25/2014
DS_KP1040_REV1.0
KP1040
Non-isolated Quasi-Resonant Buck LED Power Switch
Absolute Maximum Ratings
(Note 1)
Parameter
VDD DC Supply Voltage
Drain pin
Package Thermal Resistance (SOT89-3)
Package Thermal Resistance (TO-92)
Maximum Junction Temperature
Operating Temperature Range
Storage Temperature Range
Lead Temperature (Soldering, 10sec.)
ESD Capability, HBM (Human Body Model)
ESD Capability, MM (Machine Model)
Value
7
-0.3 to 550
83
120
160
-40 to 85
-65 to 150
260
3
250
Unit
V
V
o
o
C/W
C/W
o
o
o
o
C
C
C
C
kV
V
Recommended Operation Conditions
(Note 2)
Parameter
Operating Ambient Temperature
Value
-40 to 85
Unit
o
C
ELECTRICAL CHARACTERISTICS
(T
A
= 25
O
C, if not otherwise noted)
Symbol
Parameter
Test Conditions
Min
Typ.
Max
Unit
Supply Voltage Section(VDD Pin)
I
VDD_Op
V
DD_Op
V
DD_OFF
Operation Current
VDD Operation Voltage
VDD Under Voltage Lockout
Enter
140
5.8
5.3
260
6.2
uA
V
V
Timing Section
T
off_min
T
off_max
T
OVP_dem
Minimum OFF time
Maximum OFF time
Output OVP Threshold Time
2
250
5.5
us
us
us
Current Sense Input Section (CS Pin)
T
LEB
V
cs(max)
T
D_OCP
CS Input Leading
Blanking Time
Edge
490
500
500
100
510
ns
mV
ns
Current limiting threshold
Over Current Detection and
Control Delay
©Kiwi Instruments Corp. Confidential
-4-
11/25/2014
DS_KP1040_REV1.0
KP1040
Non-isolated Quasi-Resonant Buck LED Power Switch
Over Temperature Protection
T
SD
Thermal
Point
Foldback
Trigger
(Note 3)
150
°C
Power MOSFET Section (Drain Pin)
V
BR
R
dson
Power
MOSFET
Drain
Source Breakdown Voltage
Static
Drain-Source
Resistance
On
I(Drain)=50mA
550
12
V
ohm
Note1.
Stresses listed as the above
"Maximum
Ratings" may cause permanent damage to the device. These are for
stress ratings. Functional operation of the device at these or any other conditions beyond those indicated in the
operational sections of the specifications is not implied. Exposure to maximum rating conditions for extended periods may
remain possibility to affect device reliability.
Note2.
The device is not guaranteed to function outside its operating conditions.
Note3.
Guaranteed by design.
©Kiwi Instruments Corp. Confidential
-5-
11/25/2014
DS_KP1040_REV1.0
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