Datasheet > AL8861Q

AL8861Q

更新时间： 2023-12-26 09:00:12

品牌	Logo	应用领域
美台 - DIODES		/
页数	文件大小	规格书
15页	820K
描述
High Efficiency 40V 1.5A Automotive Grade Buck LED Driver

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AL8861Q 数据手册

AL8861Q

Thermal Information(Note 6)

Symbol

Parameter

Rating

Unit

°C /W

Junction-to-Ambient Thermal Resistance

Junction-to-Case (Top) Thermal Resistance

θ_JA

θ_JC

Note:

6. Device mounted on 2" × 2" FR-4 substrate PC board, 2oz copper, with minimum recommended pad layout.

Electrical Characteristics (@T_A= -40°C to +125°C , unless otherwise specified.)

Symbol

Parameter

Conditions

Min

Typ

Max

Unit

INPUT VOLTAGE

Input Voltage

—

4.5

—

3.8

—

4.5

630

—

V_IN

V_INSU

V_INSH

I_Q

Internal Regulator Startup Threshold

Internal Regulator Hysteresis Threshold

Quiescent Current

200

—

µA

0.55

VSET Pin Floating, V_IN= 16V

VSET Pin Grounded

Shutdown Supply Current

—

100

I_SHDN

HYSTERESTIC CONTROL

Measured on ISENSE Pin with

Respect to VIN Pin

(T_A= +25°C)

Measured on ISENSE Pin with

Respect to VIN Pin

100

104

105

Mean Current-Sense Threshold Voltage

V_SENSE

(T_A= -40°C to +125°C)

Sense Threshold Hysteresis

ISENSE Pin Input Current

—

±13

—

V_{SENSE_HYS}

I_ISENSE

µA

V_ISENSE= V_IN-0.1V

ENABLE

Input Voltage Range on VSET Pin

Analog Dimming Range

For Analog Dimming

V_ENRising

0.3

—

2.5

100

—

V_EN

DC Voltage on VSET Pin to Enable

DC Voltage on VSET Pin to Disable

—

0.25

0.2

V_{EN_ON}

—

V_{EN_OFF}

V_ENFalling

SWITCHING OPERATION

LX Pin Switch On-Resistance

—

0.2

—

Ω

R_ON

I_{LX_LEAK}

t_SS

@I_LX= 100mA

—

LX Pin Switch Leakage Current

Soft-Start Time

μA

1.5

—

V_IN= 16V, C_EN= 1nF

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

L = 47μF, I = 0.25A (I_LED= 1A)

Operating Frequency

—

250

500

—

kHz

f_SW

Recommended Minimum Switch On

Time

For 4% Accuracy

t_{ON_REC}

Recommended Maximum Switch

Frequency

—

1.0

—

MHz

f_{LX_MAX}

D_{LX_MAX}

t_PD

Maximum Duty Cycle

Internal Comparator Propagation Delay

(Note 7)

Current Limit for Internal Power Switch

100

—

I_LX(MAX)

THERMAL SHUTDOWN

Overtemperature Protection

Temperature Protection Hysteresis

—

+150

+30

—

°C

T_OTP

T_{OTP_HYS}

Note:

7. Guaranteed by design.

4 of 15

www.diodes.com

July 2023

AL8861Q

Document number: DS41798 Rev. 4 - 2

1 2 345 6 7...15

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