YB1517
Step-up DC-DC Converter & White LED Driver
Absolute Maximum Ratings
VIN ................................................................................. 20V
SW Voltage .................................................................... 35V
FB Voltage .......................................................................5V
CTRL Voltage...................................................................5V
Maximum Junction Temp,TJ (not 2) ............................150°C
Lead Temperature (Soldering 10 sec) .........................250°C
Thermal Resistance (SOT-25,
θJA)
.......................250℃/W
Internal Power Disspation (SOT-25, PD)...................... 0.4W
Recommended Operating Conditions
Operating Temperature (note 3) .........................-40°C~85°C
Supply Voltage .................................................... 2.7 V~16V
SW Voltage ....................................................................30V
ESD Susceptibility (HBM).............................................. 2KV
ESD Susceptibility (MM)...............................................200V
Electricity Characteristics
Table 3
(TA=25°C, Vin=3.3V, L=22uH, Cin=1uF, Cout=4.7uF unless otherwise noted)
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
At Isw = 200mA
Ctrl = 0.5V
Full On
Full Off
Ctrl = 2V
40
34
1.7
0.3
20
VFB = 0.5V
CTRL = 0V
Iout=20mA,Vout = 6V
Circuit of Figure 2
100% duty cycle
40% duty cycle
VFB=220mV
850
900
210
850
Test Conditions
Min
2.7
1.2
1.5
0.3
220
900
400
1
950
85
25
180
1
Typ
Max
16
1.7
1
230
1000
Units
V
mA
uA
mV
mA
mA
uA
KHz
%
%
mV
μA
V
V
μA
V
Symbol
Vin
IQ
(Quiescent
Current)
VFB
ICL
IB
FRSW
DTMX
DTMN
VSAT
ILKG
VCTL
ICTL
OVP
θJA
Thermal Resistance
220
°C/W
Note:
Absolute maximum ratings are limits beyond which damage to the device may occur. The maximum
allowable, power dissipation at any ambient temperature is calculated using: PD(MAX)= [TJ(max)-TA]/θJA .
YB1517 MRev.1.0
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YOBON [ YOBON TECHNOLOGIES,INC. ]
