YB1518ST25 参数 Datasheet PDF下载

YB1518

Step-up DC-DC Converter White LED Driver

Absolute Maximum Ratings

VIN .........................................................................20V

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

Recommended Operating Conditions

Operating Temperature ............................ -40°C~85°C

Supply Voltage............................................ 2.7 V~16V

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

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

At Isw = 200mA

Ctrl = 0.3V

Full On

Full Off

Ctrl = 2V

40

34

220

1.7

0.3

20

VFB = 0.3V

CTRL = 0V

Iout=20mA,Vout=12.5V

Circuit of Figure 1

100% duty cycle

40% duty cycle

VFB=100mV

900

930

90

400

Test Conditions

Min

2.7

1.2

1.5

0.3

100

450

350

1

960

85

25

180

1

Typ

Max

16

1.7

1

110

Units

V

mA

uA

mV

mA

mA

uA

KHz

%

%

mV

μA

V

V

μA

V

°C/W

VCTL

ICTL

OVP

θJA

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 MRev.1.2

www.yobon.com.tw

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