yb1520 YOBON TECHNOLOGIES,INC., yb1520 Datasheet - Page 3

• Manufacturer Part Number: yb1520
• Description: Step-up Dc-dc Converter, White Led Driver
• Manufacturer: YOBON TECHNOLOGIES,INC.

Absolute Maximum Ratings
VIN..........................................................10V
SW Voltage .............................................32V
FB Voltage ................................................5V
CTRL Voltage............................................5V
Maximum Junction Temp, T
Lead Temperature (Soldering 10 sec).......300°C
Electrical Characteristics
Table 2
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, T
to ambient thermal resistance, θ
at any ambient temperature is calculated using: P
power dissipation will cause excessive die temperature. All limits at temperature extremes are guaranteed via
correlation using standard statistical methods.
YB1520 Rev.1.4
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
Over Thermal Protection
Thermal Resistance
Description
(V
IN
= 3.3V, C
IN
= 1uF, C
Step-up DC-DC Converter, White LED Driver
JA
J
Symbol
............... 150°C
, and the ambient temperature. The maximum allowable, power dissipation
OUT
D
OVP
OTP
D
V
V
F
V
I
I
V
I
θ
I
I
LKG
CTL
I
LIM
I
SD
MAX
CL
SAT
CTL
SW
MIN
Q
FB
B
JA
IN
= 4.7μF, T
www.yobon.com.tw
V
CTRL = 0V
I
Circuit of Figure 1
100% duty cycle
40% duty cycle
V
At I
CTRL = 0.3V
Full On
Full Off
CTRL = 2V
OUT
FB
FB
A
D(MAX)
SW
=25°C, unless otherwise noted.)
= 200mV
= 0.3V
= 20mA,V
Test Conditions
= 200mA
= [T
Recommended Operating Conditions
Operating Temperature......... -40°C to 85°C
Supply Voltage........................... 2.7V to 7V
SW Voltage...........................................20V
J(MAX)
OUT
-T
= 12.5V
A
]/θ
JA
. Exceeding the maximum allowable
MIN
180
420
680
2.7
1.2
20
2
TYP
200
450
250
700
120
160
220
1.5
0.3
1.7
0.2
10
20
30
1
YB1520
J(MAX)
MAX
220
720
1.7
1.8
0.3
20
85
25
7
1
, the junction
Units
°C/W
KHz
mA
mV
mA
mA
mV
uA
uA
μA
μA
°C
%
%
V
V
V
V
3