EV3398E-U-00A

EV3398E-U-00A 4 strings WLED Controller With 80V Return Evaluation Board DESCRIPTION FEATURES The MP3398E is a step-up controller with four current channels designed to drive WLED arrays for large size LCD panel backlighting applications. The MP3398E is able to expand the number of LED channels with two or more ICs in parallel sharing a single power source.     The MP3398E employs peak-current mode with a fixed switching frequency. The frequency is programmable through an external setting resistor. The MP3398E drives an external MOSFET to boost up the output voltage from a 4.5V to 33V input supply and regulates the current in each LED string to the value set by an external current-setting resistor. The MP3398E applies four internal current sources for current balancing. The current matching achieves 2.3% regulation accuracy between strings. The low regulation voltage on the LED current sources reduces power loss. The MP3398E supports direct PWM dimming and analog dimming with PWM input. Full protection features include over-current protection (OCP), Over-temperature protection (OTP), Under-voltage protection (UVP), overvoltage protection (OVP), LED short/open protection, and inductor/diode short protection.         4-String, Max 400mA/String WLED Driver 4.5V to 33V Input Voltage Range 80V ABS. Rating for Each String 2.3% Current Matching Accuracy Between Each String Direct PWM Dimming Mode Analog Dimming Mode with PWM Input Cascading Capability with a Single Power Source LED Open and Short Protection Programmable Recoverable Over-Voltage Protection (OVP) 202mV Latch-off Cycle-by-Cycle Current Limit Threshold Latch-Off Over-Temperature Protection (OTP) Available in TSSOP-16EP and PDIP-16 Packages APPLICATIONS    Desktop LCD Flat Panel Displays All-in-one PCs 2D/3D LCD TVs All MPS parts are lead-free, halogen free, and adhere to the RoHS directive. For MPS green status, please visit MPS website under Quality Assurance. “MPS” and “The Future of Analog IC Technology” are Registered Trademarks of Monolithic Power Systems, Inc. The MP3398E is available in TSSOP-16EP and PDIP-16 packages. ELECTRICAL SPECIFICATIONS Parameter Symbol Value Units Input Voltage VIN 13 – 33 V 4 LED strings 20 LEDs/string LEDs # LED Current ILED 120/string mA EV3398E-U-00A Rev.1.0 www.MonolithicPower.com 11/10/2017 MPS Proprietary Information. Patent Protected. Unauthorized Photocopy and Duplication Prohibited. © 2017 MPS. All Rights Reserved. 1 EV3398E-U-00A 4 STRINGS 80V WLED CONTROLLER EV3398E-U-00A EVALUATION BOARD (L x W ) 7.75cm x 4.88cm Board Number MPS IC Number EV3398E-U-00A MP3398EGP EVALUATION BOARD SCHEMATIC EV3398E-U-00A Rev.1.0 www.MonolithicPower.com 11/10/2017 MPS Proprietary Information. Patent Protected. Unauthorized Photocopy and Duplication Prohibited. © 2017 MPS. All Rights Reserved. 2 EV3398E-U-00A 4 STRINGS 80V WLED CONTROLLER EV3398E-U-00A BILL OF MATERIALS Qty Ref Value 2 C1,C8 2.2µF 1 C2 4.7µF 1 C3 NC 1 C4 22µF 1 C5 220µF 5 C6,C7, C11,C13, C14 NC 1 C9 100pF 1 C10 470nF 1 C12 470nF 1 D1 1 F1 0Ω Ceramic Capacitor, 50V, COG Ceramic Capacitor, 16V, X7R Ceramic Capacitor, 16V, X7R Diode Schottky, 90V, 2A Resistor, 1% 1 L1 33µH 1 M1 1 R1 R2,R8, R14,R15, R16,R18 NC 0Ω Resistor, 1% 0603 Yageo RC0603JR-070RL 1 R3 316kΩ Resistor, 1% 0603 Yageo RC0603FR-07316KL 1 R4 10Ω Resistor, 1% 0603 Yageo RC0603FR-0710RL 1 R5 0.05Ω Current Resistor, 1% 1206 Yageo RC1206FR-070R05L 1 R6 NC Current Resistor, 1% 1206 Yageo RC1206FR-070R05L 1 R7 10kΩ Resistor, 1% 0603 Yageo RC0603FR-0710KL 1 R9 270Ω Resistor, 1% 0603 Yageo RC0603FR-07270RL 3 R10,R13, R20 2kΩ Resistor, 1% 0603 Yageo RC0603FR-072KL 1 R11 200kΩ Resistor, 1% 0603 Yageo RC0603FR-07100KL 2 R12, R19 100kΩ Resistor, 1% 0603 Yageo RC0603FR-07100KL LED Driver IC PDIP-16 MPS 6 U1 Description Ceramic Capacitor, 100V, X7R Ceramic Capacitor, 50V, X7R Package Manufacturer Part Number 1210 Murata GRM32ER72A225KA35L 1210 Murata GRM32ER71H475KA88L 1210 Electrolytic 100V Electrolytic 35V Capacitor, Capacitor, DIP JiangHai CD263-100V22 DIP JiangHai CD110-35V220 0603 0603 Murata GRM1885C1H101JA01D 0805 Murata GRM219R71C474KA01D 0603 Murata GRM18R7C474KA88D SMB Diodes Inc 1206 Yageo RC1206FR-070RL Inductor,5.5A,45mohm SMD Wurth 7447709330 N- channel MOSFET SO8 Analog Power B290 AM4490N 0603 MP3398EGP EV3398E-U-00A Rev.1.0 www.MonolithicPower.com 11/10/2017 MPS Proprietary Information. Patent Protected. Unauthorized Photocopy and Duplication Prohibited. © 2017 MPS. All Rights Reserved. 3 EV3398E-U-00A 4 STRINGS 80V WLED CONTROLLER EVB TEST RESULTS Performance waveforms are tested on the evaluation board. VIN = 19V, VEN=3.3V, 120mA/string, 4 strings, 20 LEDs in series, TA = 25°C, unless otherwise noted. EV3398E-U-00A Rev.1.0 www.MonolithicPower.com 11/10/2017 MPS Proprietary Information. Patent Protected. Unauthorized Photocopy and Duplication Prohibited. © 2017 MPS. All Rights Reserved. 4 EV3398E-U-00A 4 STRINGS 80V WLED CONTROLLER PRINTED CIRCUIT BOARD LAYOUT Figure 1—Top Layer Figure 2—Bottom Layer EV3398E-U-00A Rev.1.0 www.MonolithicPower.com 11/10/2017 MPS Proprietary Information. Patent Protected. Unauthorized Photocopy and Duplication Prohibited. © 2017 MPS. All Rights Reserved. 5 EV3398E-U-00A 4 STRINGS 80V WLED CONTROLLER QUICK START GUIDE 1. Connect the positive and negative terminals of the load panel (20 white LEDs in series, 4 stings) to the LED+ and LED1~4 pins on the EV board, respectively. 2. Connect the positive and negative terminals of the power supply (13V ~ 33V) to the VIN and GND pins on the EV board, respectively. 3. Drive EN pin high (5V) to enable the MP3398E. 4. For PWM dimming, apply a PWM rectangular waveform with a minimum voltage less than 0.4V and a maximum greater than 1.5V on PDIM pin. The frequency of the PWM signal is recommended between 200Hz to 2kHz. 5. For analog dimming, apply a PWM rectangular waveform with a minimum voltage less than 0.4V and a maximum greater than 1.5V on ADIM pin. The frequency of the PWM signal is recommended between >20kHz. NOTICE: The information in this document is subject to change without notice. Users should warrant and guarantee that third party Intellectual Property rights are not infringed upon when integrating MPS products into any application. MPS will not assume any legal responsibility for any said applications. EV3398E-U-00A Rev. 1.0 www.MonolithicPower.com 11/10/2017 MPS Proprietary Information. Patent Protected. Unauthorized Photocopy and Duplication Prohibited. © 2017 MPS. All Rights Reserved. 6