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AL17050 Datasheet

UNIVERSAL HIGH VOLTAGE STEP DOWN CONVERTER

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AL17050
UNIVERSAL HIGH VOLTAGE STEP DOWN CONVERTER
Description
The AL17050 is a universal AC high voltage input step down regulator
that provides accurate constant voltage (CV) and outstanding
dynamic performance without requiring an opto-coupler over line and
Load regulation. Typical applications are offline low power
applications including home appliance applications and IoT
applications.
Working with a single winding inductor and integrating a 500V
MOSFET internal can make it use fewer external components and
create a low Bill Of Material (BOM) cost solution.
The AL17050 achieves excellent regulation and high power efficiency.
The characteristics of max peak current and driving frequency vary as
the load change can get excellent efficiency performance at light load
and improve the overall average efficiency.
The AL17050 has rich protection features to enhance the system
safety and reliability. It has Over Temperature Protection, VCC Under
Voltage Lock function, Output Short Protection, Over Load Protection
and Open Loop Protection.
The AL17050 is available in the SOT25 package.
Features
Pin Assignments
(Top View)
VCC 1
FB 2
SOURCE 3
SOT25
Applications
Home Appliance Applications
IoT Applications
Industrial Controls
Standby Power
Universal 85 to 265 VAC Input Range
Constant Voltage (CV) Control
Internal MOSFET up to 500V
Low Operation Current: 100µA (Static)
Under Voltage Lock Out (UVLO)
Output Short Protection
Over Load Protection
Over Temperature Protection (OTP)
Totally Lead-Free & Fully RoHS Compliant (Notes 1 & 2)
Halogen and Antimony Free. “Green” Device (Note 3)
5 DRAIN
4 SOURCE
Notes:
1. No purposely added lead. Fully EU Directive 2002/95/EC (RoHS), 2011/65/EU (RoHS 2) & 2015/863/EU (RoHS 3) compliant.
2. See https://www.diodes.com/quality/lead-free/ for more information about Diodes Incorporated‟s definitions of Halogen- and Antimony-free, "Green"
and Lead-free.
3. Halogen- and Antimony-free "Green” products are defined as those which contain <900ppm bromine, <900ppm chlorine (<1500ppm total Br + Cl) and
<1000ppm antimony compounds.
AL17050
Document number: DS40584 Rev. 2 - 2
1 of 15
www.diodes.com
April 2018
© Diodes Incorporated


Diodes Semiconductor Electronic Components Datasheet

AL17050 Datasheet

UNIVERSAL HIGH VOLTAGE STEP DOWN CONVERTER

No Preview Available !

Typical Applications Circuit
RF1
L
D1
C1
N D2
L1
C2
U1
DRAIN
Vcc
C3
AL17050
R1
FB
R2
Source
D4
C5
C4
L2
D3 C6
VOUT
R3
Gnd
Pin Descriptions
Pin Number
1
2
3,4
5
Pin Name
VCC
FB
SOURCE
DRAIN
Function
Control Circuit Power Supply
Regulator Feedback
Internal power MOSFET Source. Ground reference for VCC and FB Pins
Internal power MOSFET Drain. High voltage current source input
Functional Block Diagram
VCC Power
DRAIN
Logic
Driver
VREF
FB
Control
FB
Protection
CS Limit
VLIMIT RCS
SOURCE
AL17050
Document number: DS40584 Rev. 2 - 2
2 of 15
www.diodes.com
April 2018
© Diodes Incorporated


Part Number AL17050
Description UNIVERSAL HIGH VOLTAGE STEP DOWN CONVERTER
Maker Diodes
Total Page 15 Pages
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