AP3064EV1 User Guide General Description Key Features This demonstration board utilizes the AP3064 high efficiency boost controller with 4-string current sources for driving WLED backlight. The AP3064 operates over a wide input voltage range from 4.5V to 33V. The current of 4 strings are simply programmed from 20mA to 220mA with an external resistor. The current matching between each string is 1.5% (Typ). Its operating frequency can be adjusted from 0.1MHz to 1MHz, which allows trade-offs between external component size and system efficiency. The AP3064 supports external Pulse Width Modulation (PWM) Dimming Control with a wide dimming frequency range from 100Hz to 20kHz. The AP3064 features cycle-by-cycle current limit, soft-start, under voltage lockout (UVLO) protection, programmable OVP, over temperature protection (OTP), open/short LED protection, VOUT short/Schottky diode open protection and Schottky Diode / Inductor short-circuit protection. Applications LCD Monitor LCD Display Module LCD TV AP3064EV1 May 2014 www.diodes.com Input Voltage Range: 4.5V to 33V Drives up to 4 Strings in Parallel, Up to 220mA per string Programmable WLED Current from 20mA to220mA Adjustable Operating Frequency: 100kHz to1MHz 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 VOUT Short/Schottky Diode Open Protection AP3064EV1 Specifications Parameter Value Input Voltage LED Current Number of LEDs 24VDC 120mA * 4Channel 13 LEDs in series per string, 4 strings 103mm x 56mm XY Dimension Page 1 of 8 AP3064EV1 User Guide Figure 1: Top View Figure 2: Bottom View Connection Instructions Power Supply Input: 24VDC (VIN, GND) Enable Signal Input: 5V DC (EN, GND) PWM Signal Input: (DIM, GND) LED Outputs: LED+ (Vo), LED- (VCH1~VCH4) AP3064EV1 May 2014 www.diodes.com Page 2 of 8 AP3064EV1 User Guide Evaluation Board Schematic 30W@100MHz VIN L C1 22mF VIN OUT R4 0W C5 47mH D1 Q1 R10 C3 C4 22mF 22mF R13 2W CS NC FB VOUT 1M R3 0W NC R1 0.3W C2 R2 0.3W C8 820pF R11 30k 13X4 EN ON OFF R6 10k R5 300k OVP R15 1k C7 0.22mF R14 VCC CH1 --- COMP AP3064 RT R12 120k CH4 C6 100k 2.2mF STATUS STATUS ISET R9 R7 ON OFF R8 10k 300k DIM GND 10k Figure 3: Evaluation Board Schematic AP3064EV1 May 2014 www.diodes.com Page 3 of 8 AP3064EV1 User Guide Evaluation Board Layout Figure 4: PCB Board Layout Top View Figure 5: PCB Board Layout Bottom View Quick Start Guide 1. 2. 3. 4. 5. 6. 7. By default, the evaluation board is preset at 120mA LED Current per channel by R9. Connect the anode wire of external LED string to Vo pin. Connect the cathode wire of external LED string to CH1~CH4 pins. Power Supply: Connect the 24VDC to Vin & GND pin to supply AP3064 Enable the IC: Connect 5 VDC to EN & GND pin to enable the circuit. PWM Dimming: Connect a synchronal PWM signal (Vpp=5V) to PWM pin to dim the LEDs. LED string should light up after 4~6 steps. AP3064EV1 May 2014 www.diodes.com Page 4 of 8 AP3064EV1 User Guide Bill of Material # 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 Name Quantity Package Description U1 1 SOP-16 AP3064 L1 1 DIP-2 47uH/3A Q1 1 TO-252(DPAK) 100V/7.7A; ZXMN10A09K D1 1 SMC 100V/3A; B3100 C1 1 Φ6 22uF/50V C3,C4 2 Φ6 22uF/100V R1,R2 2 1206 300mΩ, 5% Precision R3,R4 2 0805 0Ω, 5% Precision R5 1 0805 300kΩ, 5% Precision R6,R7 2 0805 10kΩ, 5% Precision R9 1 0805 10kΩ, 1% Precision R10 1 0805 1MΩ, 5% Precision R11 1 0805 30kΩ , 5% Precision R12 1 0805 120kΩ, 5% Precision R13 1 0805 2Ω, 5% Precision R14 1 0805 100kΩ, 5% Precision R15 1 0805 1kΩ, 5% Precision C6 1 0805 2.2uF/16V, Ceramic X7R C7 1 0805 0.22uF/16V, Ceramic X7R C8 1 0805 21 FB 1 1206 820pF/16V, Ceramic X7R 30Ω@100M Hz, AEM:MCP1206F300PT-T AP3064EV1 May 2014 www.diodes.com Page 5 of 8 AP3064EV1 User Guide Functional Waveforms Waveforms: VSW VIN VO VSW ICH Operation Waveform (100% Duty) VPWM ICH VO Dimming Waveform (fPWM=200Hz ,50% Duty) Functional Data Curves 100 130 90 120 110 80 100 Channel Current (mA) Efficiency (%) 70 60 50 AP3064 Vin=24V 40 30 20 90 80 70 60 50 40 30 fDimming=200Hz 20 10 10 0 50 100 150 200 250 300 350 400 450 500 550 0 0 10 20 30 40 50 60 70 80 90 Output Current(mA) Duty Cycle (%) Efficiency VS Output current Channel Current VS Duty cycle AP3064EV1 May 2014 www.diodes.com Page 6 of 8 100 AP3064EV1 User Guide Thermal Test Thermal Test of AP3064 AP3064EV1 May 2014 www.diodes.com Page 7 of 8 AP3064EV1 User Guide IMPORTANT NOTICE DIODES INCORPORATED MAKES NO WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, WITH REGARDS TO THIS DOCUMENT, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE (AND THEIR EQUIVALENTS UNDER THE LAWS OF ANY JURISDICTION). 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