Datasheet > AL8861

AL8861

更新时间： 2022-02-26 12:28:08

品牌	Logo	应用领域
美台 - DIODES		驱动
页数	文件大小	规格书
18页	685K
描述
40V 1.5A BUCK LED DRIVER

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数据手册

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AL8861 数据手册

AL8861

Recommended Operating Conditions

Symbol

V_IN

Parameter

Min

4.5

—

Max

Unit

Input Voltage

Switching Frequency

MHz

f_SW

TSOT25

SOT89-5

—

Continuous Output Current

—

1.5

+85

+125

100

I_OUT

MSOP-8EP

—

Operating Ambient Temperature

Operating Junction Temperature

-40

° C

T_A

T_J

—

Recommended Analog Dimming Range

Electrical Characteristics (@V_IN= 16V, T_A= +25°C, unless otherwise specified.)

Symbol

Parameter

Conditions

Min

Typ

Max

Unit

SUPPLY VOLTAGE

Input Voltage

Quiescent Current

—

4.5

—

0.55

—

V_IN

I_Q

—

µ A

V_SETPin Floating, V_IN= 16V

V_SETPin Grounded

—

Shutdown Supply Current

100

I_SHDN

Measured on I_SENSEPin with

Respect to V_IN

Mean Current Sense Threshold Voltage

100

104

V_SENSE

—

Sense Threshold Hysteresis

I_SENSEPin Input Current

—

2.5

—

µ A

V_{SENSE_HYS}

I_SENSE

V_EN

V_SENSE= V_IN-0.1V

For Analog Dimming

VEN Rising

0.3

—

V_SETRange on V_SETPin

DC Voltage on V_SETPin to Enable

DC Voltage on V_SETPin to Disable

L_XSwitch On-Resistance

L_XSwitch Leakage Current

Soft-Start Time

0.25

0.2

—

V_EN(ON)

V_EN(OFF)

R_LX

VEN Falling

Ω

@I_LX= 100mA

—

μA

I_LX(LEAK)

t_SS

1.5

—

V_IN= 16V, C_EN= 1nF

V_I= 16V, V_O= 9.6V (3 LEDs)

Operating Frequency

—

250

—

kHz

f_LX

L = 47μF, ΔI = 0.25A (I_LED= 1A)

Recommended Minimum Switch ON

Time

Recommended Maximum Switch

Frequency

For 4% Accuracy

—

500

—

t_{ON_REC}

f_LX(MAX)

—

1.0

MHz

Max Duty Circle

—

D_LX(MAX)

D_LX

Recommended Duty Cycle Range

—

Internal Comparator Propagation Delay

(Note 8)

—

t_PD

Overtemperature Protection

Temp Protection Hysteresis

Current Limit

—

+150

+30

—

° C

T_OTP

—

T_{OTP_HYS}

I_XL(MAX)

Peak Inductor Current

Note:

8. Guaranteed by design.

4 of 18

www.diodes.com

October 2017

AL8861

Document number: DS39435 Rev. 3 - 2

1 2 345 6 7...18

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