NOT RECOMMENDED FOR NEW DESIGN USE AL3065 AP3064 FOUR-CHANNEL CURRENT SOURCE BOOST LED DRIVER Description Pin Assignments The AP3064 is a high efficiency boost controller with 4-string current sources for driving WLED backlight. It operates over a wide input (Top View) voltage range from 4.5V to 33V. 16 CH4 1 CH3 The current of 4 strings are simply programmed from 20mA to 220mA 15 with an external resistor. The current matching between each string is ISET 2 GND 1.5% (Typ). Its operating frequency can be adjusted from 0.1MHz to OVP 3 14 CH2 1MHz. 13 RT 4 CH1 The AP3064 features cycle-by-cycle current limit, soft-start, under 12 5 DIM EN voltage lockout (UVLO) protection, programmable OVP, over temperature protection (OTP), open/short LED protection, V CS 6 11 COMP OUT short/Schottky diode open protection and Schottky Diode short-circuit 10 OUT 7 STATUS protection. VCC 8 9 VIN The AP3064 is available in SO-16 package. SO-16 Features Applications Input Voltage Range: 4.5V to 33V LCD Monitor Drives up to 4 Strings in Parallel, 220mA per String LCD Display Module Programmable WLED Current from 20mA to 220mA LCD TV Adjustable Operating Frequency: 100kHz to 1MHz String-to-string Current Matching Accuracy: 1.5% Built-in OCP, OTP, UVLO External PWM Dimming Open/Short LED Protection Programmable Soft-start Programmable OVP Schottky Diode/Inductor Short-circuit Protection V Short/Schottky Diode Open Protection OUT 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 --- AP3064 Typical Applications Circuit 600 100MHz V OUT V IN L 47H FB R D1 C C OV1 3 4 C 1 Q1 22F 22F 22F VIN OUT 1M R13 2 R 0 4 CS C 5 NC R 0 3 C R R ROV2 1 2 13X4 NC C2 820pF 0.3 0.3 36k EN ON OFF R 10k 6 R5 OVP 300k RT CH1 RT COMP 120k R15 1k CH4 VCC R14 C C VCC 7 0.22F 2.2F 100k ISET STATUS STATUS RISET R8 10k 10k ON OFF DIM GND R7 300k Pin Description Pin Number Pin Name Function 1 CH4 LED current sink 4. Leave the pin open directly if not used LED current setting pin. The corresponding maximum current of all 4 strings is set through connecting a 2 ISET resistor from this pin to GND Over voltage protection pin. When the OVP pin voltage exceeds 2.0V, the OVP is triggered and the power 3 OVP switch is turned off. When the OVP pin voltage drops below hysteresis voltage, the OVP is released and the power switch will resume normal operation 4 RT Frequency control pin ON/OFF control pin. Forcing this pin above 2.4V enables the IC while below 0.5V shuts down the IC. When 5 EN the IC is in shutdown mode, all functions are disabled to decrease the supply current below 3A 6 CS Power switch current sense input Boost converter power switch gate output. This pin output high voltage (5V/V -0.5V) to drive the external N- IN 7 OUT MOSFET 5V linear regulator output pin. This pin should be bypassed to GND (recommend to connect with GND pin) 8 VCC with a ceramic capacitor Supply input pin. A capacitor (typical 10F) should be connected between the V and GND to keep the DC IN 9 VIN input voltage constant 10 STATUS LED operation status output 11 COMP Soft-start and control loop compensation PWM dimming control pin. 12 DIM Adding a PWM signal to this pin to control LED dimming. If not used, connect it to the high level 13 CH1 LED current sink 1. Leave the pin open directly if not used 14 CH2 LED current sink 2. Leave the pin open directly if not used 15 GND Ground 16 CH3 LED current sink 3. Leave the pin open directly if not used 2 of 13 April 2021 AP3064 Diodes Incorporated www.diodes.com Document number: DS37485 Rev. 4 - 3 AP3064