YB1518 Datasheet, PDF (3/12 Pages) YOBON TECHNOLOGIES,INC. – Step-up DC-DC Converter White LED Driver

YB1518
Step-up DC-DC Converter White LED Driver
Absolute Maximum Ratings
Recommended Operating Conditions
VIN ...........................................................................9V
SW Voltage ............................................................36V
FB Voltage ...............................................................5V
CTRL Voltage...........................................................5V
Maximum Junction Temp,TJ .............................150°C
Lead Temperature (Slokering 10 sec) ................300°C
Thermal Resistance............................................195°C
Operating Temperature ............................ -40°C~85°C
Supply Voltage.............................................. 2.7 V~7V
SW Voltage ............................................................32V
Electricity Characteristics
(TA=25°C, Vin=3.3V, Cin=1uF Cout=10uF unless otherwise noted) Table 3
Symbol
Vin
IQ (Quiescent
Current)
VFB
ICL
IB
FRSW
DTMX
DTMN
VSAT
ILKG
VCTL
ICTL
OVP
θJA
Function Parameter
Input Voltage Range
Not Switching
Shutdown
Feedback Voltage
Switch Current Limit
FB Pin Bias Current
Switching Frequency
Maximum Duty Cycle
Minimum Duty Cycle
Switch Vcesat
Switch Leakage
Current
VCTRL for Full LED
Current
CTRL Pin Bias Current
Over Voltage
Protection
Thermal Resistance
Test Conditions
VFB = 0.3V
CTRL = 0V
Iout=20mA,Vout=12.5V
Circuit of Figure 1
100% duty cycle
40% duty cycle
VFB=100mV
At Isw = 200mA
Ctrl = 0.3V
Full On
Full Off
Ctrl = 2V
Min Typ Max
2.7
7
1.2 1.5 1.7
0.3
1
90 100 110
200 230
180
1
900 930 960
85
20
25
180
Units
V
mA
uA
mV
mA
mA
uA
KHz
%
%
mV
1
μA
1.7
V
0.3
V
40
μA
34
V
220
°C/W
Note:
Absolute maximum ratings are limits beyond which damage to the device may occur.
The maximum allowable power dissipation is a function of maximum function temperature , TJ(max), the
junction to ambient thermal resistance, θJA , and the ambient temperature. The maximum allowable, power
dissipation at any ambient temperature is calculated using: PD(MAX)= [TJ(max)-TA]/θJA . Exceeding the
maximum allowable power dissipation will cause excessive die temperature. All limits at temperature
extremes are guaranteed via correlation using standard statistical methods
YB1518 Rev.1.3
www.yobon.com.tw
3