YB1520ST25 View Datasheet(PDF) - YOBON TECHNOLOGIES,INC.
Part Name
Description
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YB1520ST25 Datasheet PDF : 10 Pages
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YB1520
Step-up DC-DC Converter, White LED Driver
Absolute Maximum Ratings
Recommended Operating Conditions
VIN .......................................................... 10V
SW Voltage .............................................32V
FB Voltage ................................................5V
CTRL Voltage............................................5V
Maximum Junction Temp, TJ ............... 150°C
Lead Temperature (Soldering 10 sec).......300°C
Operating Temperature......... -40°C to 85°C
Supply Voltage........................... 2.7V to 7V
SW Voltage...........................................20V
Electrical Characteristics
Table 2 (VIN = 3.3V, CIN = 1uF, COUT = 4.7μF, TA=25°C, unless otherwise noted.)
Description
Symbol
Test Conditions
MIN TYP
MAX Units
Input Voltage Range
VIN
2.7
7
V
Not Switching
IQ
VFB = 0.3V
1.2 1.5 1.7 mA
Shutdown
Feedback Voltage
ISD
CTRL = 0V
0.3
1
uA
VFB
IOUT = 20mA,VOUT = 12.5V
Circuit of Figure 1
180
200
220
mV
Switch Current Limit
ICL
100% duty cycle
420 450
mA
ILIM
40% duty cycle
250
mA
FB Pin Bias Current
IB
VFB = 200mV
2
10
20
uA
Switching Frequency
FSW
680 700 720 KHz
Maximum Duty Cycle
DMAX
85
%
Minimum Duty Cycle
DMIN
20
25
%
Switch Vcesat
VSAT
At ISW = 200mA
120
mV
Switch Leakage Current
ILKG
CTRL = 0.3V
1
μA
VCTRL for Full LED Current
VCTL
Full On
Full Off
1.7 1.8
V
0.2 0.3
V
CTRL Pin Bias Current
ICTL
CTRL = 2V
20
μA
Over Voltage Protection
OVP
30
V
Over Thermal Protection
OTP
160
°C
Thermal Resistance
θJA
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.
YB1520 Rev.1.4
www.yobon.com.tw
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