Datasheet AL3353 (Diodes)
| Manufacturer | Diodes |
| Description | High Performance Boost LED Controller |
| Pages / Page | 15 / 1 — AL3353. HIGH PERFORMANCE BOOST LED CONTROLLER. Description. Pin … |
| File Format / Size | PDF / 368 Kb |
| Document Language | English |
AL3353. HIGH PERFORMANCE BOOST LED CONTROLLER. Description. Pin Assignments. (Top View). SO-8 (Type TH2). Features. Applications
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AL3353 HIGH PERFORMANCE BOOST LED CONTROLLER Description Pin Assignments
The AL3353 is a highly-integrated and cost-effective Light Emitting
Diode (LED) controller optimized for LCD monitor and LCD TV
(Top View)
backlighting application. It provides a high-performance LED backlight
solution with low-BOM cost. VIN 1 8 PWM The AL3353 contains a PWM boost driver, which uses current mode
control and fixed frequency operation to regulate the LED current. GATE 2 7 OVP
T
The LED current is sensed through an external current sense resistor. The voltage across the sensing resistor is compared with reference GND 3 6 COMP
UC
level of 400mV; the error is amplified to control the pulse width of the power switch thus to regulate the current flowing the LED. CS 4 5 FB
OD R
The AL3353 offers PWM-to-analog dimming mode for a wide range of
SO-8 (Type TH2) P
dimming control.
W
The AL3353 has comprehensive protection features such as power
NE
MOSFET overcurrent protection (OCP), output overvoltage protection
(OVP), Diode & Inductor short protection, LED cathode short-to-GND
protection, IC power supply undervoltage lockout (UVLO), LED open
protection, VOUT short protection and overtemperature protection
(OTP).
The AL3353 is available in the SO-8 (Type TH2) package.
Features Applications
• Wide Input Voltage Range: 9V to 40V • LCD TV • High Precision Feedback Reference Voltage: 400mV/±1.5% • LCD Monitor • Current Mode PWM Controller with Good Dynamic Response • Flat Panel Display • PWM to Analog Dimming Mode • Built-In Comprehensive Protections Under Voltage Lock Out (UVLO) Output Over Voltage Protection (OVP) Power MOSFET Over Current Protection (OCP) Diode and Inductor Short Protection LED Cathode Short to GND Protection LED Open Protection VOUT Short Protection Over Temperature Protection (OTP) • Available in Pb-Free SO-8 (Type TH2) Package •
Totally Lead-Free & Fully RoHS Compliant (Notes 1 & 2)
•
Halogen and Antimony Free. “Green” Device (Note 3)
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. AL3353 1 of 15 February 2019 Document number: DS41487 Rev. 2 - 2
www.diodes.com
© Diodes Incorporated Document Outline Pin Assignments Description Applications Features
The AL3353 is a highly-integrated and cost-effective Light Emitting
Diode (LED) controller optimized for LCD monitor and LCD TV
(Top View)
backlighting application. It provides a high-performance LED backlight
solution with low-BOM cost. VIN 1 8 PWM The AL3353 contains a PWM boost driver, which uses current mode
control and fixed frequency operation to regulate the LED current. GATE 2 7 OVP
T
The LED current is sensed through an external current sense resistor. The voltage across the sensing resistor is compared with reference GND 3 6 COMP
UC
level of 400mV; the error is amplified to control the pulse width of the power switch thus to regulate the current flowing the LED. CS 4 5 FB
OD R
The AL3353 offers PWM-to-analog dimming mode for a wide range of
SO-8 (Type TH2) P
dimming control.
W
The AL3353 has comprehensive protection features such as power
NE
MOSFET overcurrent protection (OCP), output overvoltage protection
(OVP), Diode & Inductor short protection, LED cathode short-to-GND
protection, IC power supply undervoltage lockout (UVLO), LED open
protection, VOUT short protection and overtemperature protection
(OTP).
The AL3353 is available in the SO-8 (Type TH2) package.
Features Applications
• Wide Input Voltage Range: 9V to 40V • LCD TV • High Precision Feedback Reference Voltage: 400mV/±1.5% • LCD Monitor • Current Mode PWM Controller with Good Dynamic Response • Flat Panel Display • PWM to Analog Dimming Mode • Built-In Comprehensive Protections Under Voltage Lock Out (UVLO) Output Over Voltage Protection (OVP) Power MOSFET Over Current Protection (OCP) Diode and Inductor Short Protection LED Cathode Short to GND Protection LED Open Protection VOUT Short Protection Over Temperature Protection (OTP) • Available in Pb-Free SO-8 (Type TH2) Package •
Totally Lead-Free & Fully RoHS Compliant (Notes 1 & 2)
•
Halogen and Antimony Free. “Green” Device (Note 3)
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. AL3353 1 of 15 February 2019 Document number: DS41487 Rev. 2 - 2
www.diodes.com
© Diodes Incorporated Document Outline Pin Assignments Description Applications Features
