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KB4312 Datasheet(PDF) 3 Page - Kingbor Technology Co

Part # KB4312
Description  Tiny Package, High Performance, Constant Current Switching Regulator for White LED
PDF  9 Pages
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Manufacturer  KINGBOR [Kingbor Technology Co]
Direct Link  http://www.kingbor.com
Logo KINGBOR - Kingbor Technology Co

KB4312 Datasheet(HTML) 3 Page - Kingbor Technology Co

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Values
Parameter
Symbol
Min.
Typ.
Max.
Unit
Power supply voltage
VIN
2.5
6.5
V
Operating temperature
Top
-30
+25
+85
(VIN=2.5V, Ta=+25
, unless otherwise noted)
Parameter
Symbol
Test Condition
Min.
Typ.
Max. Units
Operating V
IN Range
VIN
V
IN input Voltage
2.5
-
6.5
V
Under Voltage Thershold
UVLO
VIN falling, 100mV hysteresis
1.4
1.5
1.6
V
No Load Current
IIN1
No Switching , FB>0.2V
-
1
3
mA
Shutdown Current
IIN3
EN=0V
-
-
1
uA
Feedback Reference (+/-5%)
VFB
0.225
0.240 0.255
V
Over-voltage Threshold
VOVP
16
17
20
V
Over-voltage Hysteresis
2
V
OVP Leakage Current
IOVP
EN=0V
-
-
1
uA
Output Voltage Line Regulation
2.5V< V
IN <6.0V
-
0.1
-
%
Switching Frequency
fOSC
0.5
0.8
1.0
MHz
Maximum Duty
DMAX
-
90
-
%
Soft-Start charging time
tSS
0.05
0.2
ms
Switching Current Limit
ILX
VIN=3.0V,duty cycle=80% ,
-
0.15
-
A
LX ON Resistance
RLX
VIN =2.5V, ILX =750mA
-
0.40
-
LX Leakage Current
ILeakage
VLX =16V, EN=0V
-
-
1
uA
EN Input Current
IEN
EN=5V
-
-
1
uA
VIH
1.5
-
-
V
EN Input Level
VIL
-
-
0.4
V
EN low Shutdown Delay
4
ms
EN Low Cycle Time
tCYCL
Note(1)
0.05
4
ms
EN High Cycle Time
tCYCH
Note(1)
0.05
4
ms
Note(1): tCYCL and tCYCH are included rising time and falling time of PWM signal.
3
KB4312
Kingbor Technology Co.,Ltd
TEL:(86)0755-26508846 FAX:(86)0755-26509052
ELECTRICAL CHARACTERISTICS
RECOMMENDED OPERATION CONDITIONS
Recommended PCB Layout
Feedback Reference (+/-2%)
VFB
1.245
1.270 1.295
V
KB4312B
KB4312A
KB4312B
KB4312B



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