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AL3065A Datasheet

BOOST CONTROLLER

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AL3065A
BOOST CONTROLLER WITH 4-CHANNEL HIGH PERCISION CURRENT SOURCE
Description
The AL3065A is a high level integration boost controller with four
channels for WLED backlight applications. It operates over a wide
input voltage ranging from 4.5V to 33V.
Pin Assignments
(Top View)
The current of the four channels is simply programmed from 20mA to
400mA with an external resistor. The current match between any
channels is ±0.5% (typical). Its operating frequency can be adjusted
from 0.1MHz to 1MHz.
The AL3065A can be dimmed by one of the following modes: direct
PWM dimming, PWM-to-analog dimming, or DC-to-analog dimming.
Robust protection features include cycle-by-cycle current limit, soft-
start, UVLO, programmable OVP, OTP, open/short LED protection,
Schottky diode short and open protection, inductor short-circuit
protection, and VOUT short protection.
SO-16
The IC is available in SO-16 packages.
Features
Input Voltage Range: 4.5V to 33V
Four High-Precision Current Sources
Current Matching ±0.5% (Typical)
LED String Current up to 250mA per Channel, 400mA
Pulse
Current
Low Ripple for Low BOM Cost
6KV HBM ESD Class
High Voltage Pins CS and OVP for Safety Test
Supports Direct PWM Dimming, PWM-to-Analog Dimming, and
DC-to-Analog Dimming Control
Minimum PWM Dimming Duty Cycle can be 1/10,000 at 100Hz
Dimming Frequency
Built-in Below Comprehensive Protections
Overcurrent Protection (OCP)
Overvoltage Protection (OVP)
Overtemperature Protection (OTP)
Undervoltage Lock Out (UVLO)
LED Open/Short Protection
Schottky Diode/Inductor Short-Circuit Protection
VOUT Short/Schottky Diode Open Protection
Available in Pb-Free SO-16 Package
Totally Lead-Free & Fully RoHS Compliant (Notes 1 & 2)
Halogen and Antimony Free. “Green” Device (Note 3)
Applications
LCD Monitor
LCD Display Module
LCD TV
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.
AL3065A
Document number: DS41124 Rev. 1 - 2
1 of 16
www.diodes.com
August 2018
© Diodes Incorporated


Diodes Semiconductor Electronic Components Datasheet

AL3065A Datasheet

BOOST CONTROLLER

No Preview Available !

Typical Applications Circuit
VIN
CIN
10µF
L 22µH
ON OFF
10k
VIN
EN
RT
120k
RC
1k
CC
0.22µF
CVCC
2.2µF
RT
COMP
VCC
VCC / DC signal / NC
PWM input
ADIM
DIM
10k
D
OUT
CS
RCS
0.15
COUT1
22µF
ROV1 COUT2
1M22µF
VOUT
ROV2
51k
OVP
CH1
CH2
CH3
CH4
ISET
GND
RISET
10k
AL3065A
Pin Descriptions
Pin Number
SO-16
1
2
Pin Name
CH4
ISET
3 OVP
4 RT
5 EN
6 CS
7 OUT
8 VCC
9 VIN
10 ADIM
11 COMP
12 DIM
13 CH1
14 CH2
15 GND
16 CH3
Function
LED Current Sink 4. If not used—see1- to 3-Channel Recommended Connections.
LED Current Set Pin. The corresponding maximum current of all four strings is set through connecting a
resister from this pin to GND.
Overvoltage Protection Pin. When the OVP pin voltage exceeds 2.0V, the OVP is triggered, and the
power switch is turned off. When the OVP pin voltage drops below Hysteresis voltage, the OVP is
released, and the power switch resumes normal operation.
Frequency Control Pin.
ON/OFF Control Pin. Forcing this pin voltage above 2.4V enables the IC while forcing below 0.5V shuts
down the IC. When the IC is in shutdown mode, all functions are disabled to reduce the supply current
below 3µA.
Power Switch Current Sense Input.
Boost Converter Power Switch Gate Output. This pin outputs high voltage (5V) to drive the external N-
MOSFET.
5V Linear Regulator Output Pin. This pin must be bypassed to GND with a ceramic capacitor.
Supply Input Pin. A capacitor (typical 10µF) must be connected between the VIN and GND to keep the
DC input voltage constant.
Analog Dimming Pin, which is used in conjunction with DIM. When a DC voltage between 0V and 1.5V is
applied to this pin, analog dimming is achieved if DIM is tied HIGH. When a capacitor is connected
between this pin and GND, the PWM signal applied to the DIM pin is filtered and modulates the output
current. When this pin is connected to a HIGH level, direct PWM dimming is achieved.
Soft-Start and Control Loop Compensation.
PWM Dimming Control Pin, which is used in conjunction with ADIM. Apply the PWM signal to this pin. Tie
this pin to logic HIGH level, for analog dimming.
LED Current Sink 1. If not used—see 1- to 3-Channel Recommended Connections.
LED Current Sink 2. If not used—see 1- to 3-Channel Recommended Connections.
Ground.
LED Current Sink 3. If not used—see 1- to 3-Channel Recommended Connections.
AL3065A
Document number: DS41124 Rev. 1 - 2
2 of 16
www.diodes.com
August 2018
© Diodes Incorporated


Part Number AL3065A
Description BOOST CONTROLLER
Maker Diodes
Total Page 16 Pages
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