AL8861

Document number: DS39435 Rev. 3 - 2

3 of 18

www.diodes.com

October 2017

© Diodes Incorporated

AL8861

Functional Block Diagram

Symbol

Parameter

Rating

Unit

Input Voltage

-0.3 to +42

V

-0.3 to +42

V

-0.3 to +6

V

Operating Junction Temperature

+150

°C

Storage Temperature Range

-65 to +150

°C

Lead Temperature (Soldering, 10sec)

+260

°C

Thermal Resistance (Junction to Ambient)

TSOT25 (Note 5)

147

°C/W

SOT89-5 (Note 6)

116

MSOP-8EP (Note 7)

56

Thermal Resistance (Junction to Case)

TSOT25 (Note 5)

27

°C/W

SOT89-5 (Note 6)

24

MSOP-8EP (Note 7)

15

Note:

4.

Stresses greater than those listed under ―Absolute Maximum Ratings‖ may cause permanent damage to the device. These are stress ratings only, and

functional operation of the device at these or any other conditions beyond those indicated under ―Recommended Operating Conditions‖ is not implied.

Exposure to ―Absolute Maximum Ratings‖ for extended periods may affect device reliability.

5. Device mounted on 1"x1" FR-4 MRP substrate PC board, 2oz cooper, with minimum recommended pad layout.

6. Device mounted on 1"*1" FR-4 substrate PC board, 2oz copper, with minimum recommended pad layout.

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

VDD

Generator

BG &

Reference

Hysteresis

Control

Current

Monitor

PWM/DC

Dimming

OTP

Current

Limiter

Logic & Driver

OTP

Comp

PWM

4.5V

4.5V Drv

Ref

PWM

GND