RT8130BGQW Evaluation Board your power partner. 12V High Efficiency Synchronous Buck PWM Controller Purpose The RT8130B is a high efficiency single phase synchronous Buck DC/DC controller with 5V/12V supply voltage. This document explains the function and use of the RT8130B evaluation board (EVB), and provides information to enable operation, modification of the evaluation board and circuit to suit individual requirements. Table of Contents Purpose ................................................................................................................................................................. 1 Introduction............................................................................................................................................................ 2 Key Performance Summary Table .......................................................................................................................... 2 Bench Test Setup Conditions ................................................................................................................................. 3 Schematic, Bill of Materials & Board Layout ........................................................................................................... 4 More Information.................................................................................................................................................... 8 Important Notice for Richtek Evaluation Board ....................................................................................................... 8 EVB_RT8130BGJ8F-00 November 2015 1 http://www.richtek.com RT8130BGQW Evaluation Board your power partner. Introduction General Product Information The RT8130B is a high efficiency single phase synchronous Buck DC/DC controller with 5V/12V supply voltage. The RT8130B has embedded MOSFET gate driver with high driving capability, supporting driving voltage up to 12V for high output current application. This device uses lossless low-side MOSFET RDS(ON) current sense technique for over-current protection with adjustable threshold set by the LGATE pin (LGOCS). Other features include power good indication, enable/disable control and internal soft-start. The RT8130B also provides fault protection functions to protect the power stage output. With above functions, the IC provides customers a cost- effective solution for high efficiency power conversion. The RT8130B is available in the WDFN-10L 3x3 package. Product Feature High Light Load Efficiency Single 5V to 12V Driver Voltage Integrated High Driving Capability N-MOSFET Gate Drivers 300kHz Fixed Frequency Internal Oscillator 85% Maximum PWM Duty Cycle Power Good Indicator Enable/Disable Control Internal Soft-Start Lossless Low-Side MOSFET RDS(ON) Current Sensing for Over-Current Fault Monitoring LGATE Over-Current Setting (LGOCS) Dedicated Output Voltage Monitor OCP, UVP, OVP, OTP, UVLO Key Performance Summary Table Key Features Evaluation Board Number : PCB048_V1 Input Voltage Range 19V Max Output Current 7A Default Output Voltage 12V Default Marking & Package Type RT8130BGQW, WDFN-10L 3x3 Operation Frequency Steady 300kHz at all loads EVB_RT8130BGJ8F-00 November 2015 2 http://www.richtek.com RT8130BGQW Evaluation Board your power partner. Bench Test Setup Conditions Headers Description and Placement Please carefully inspect the EVB IC and external components, comparing them to the following Bill of Materials, to ensure that all components are installed and undamaged. If any components are missing or damaged during transportation, please contact the distributor or send e-mail to [email protected] Test Points The EVB is provided with the test points and pin names listed in the table below. Test point/ Pin name Signal Comment (expected waveforms or voltage levels on test points) VIN Input voltage Power input. Support 2.5V to 21V Input Voltage. Must bypass with a suitable large ceramic capacitor at this pin. VCC Internal Driver voltage 5V or 12V bias input supply. Connect a 2.2µF capacitor to ground. GND Ground Ground. BOOT Bootstrap supply test point Bootstrap supply for high-side gate driver. Connect a 0.1µF ceramic capacitor between the BOOT and SW pins. PHASE Switch node test point Connect this pin to an external L-C filter. UG High-Side MOSFET Gate Driver Output Connect this pin to the Gate of high-side MOSFET for floating drive. LG Low-Side MOSFET Gate Driver Output Connect this pin to the Gate of low-side MOSFET. This pin is also used for Over-Current Protection (OCP) threshold setting. Connect a resistor (ROCSET) from this pin to the GND pin to set the OCP threshold. PGOOD Power Good Indicator Output This pin provides an open-drain output. Connect this pin to a voltage source through a pull-up resistor. EVB_RT8130BGJ8F-00 November 2015 3 http://www.richtek.com RT8130BGQW Evaluation Board your power partner. Power-up & Measurement Procedure 1. Connect input power (2.5V < VIN < 21V) to VIN test pin. 2. Connect positive end and negative terminals of load to VOUT and GND test pins respectively. 3. Connect 5V or 12V for VCC test pin. 4. Verify the output voltage (approximately 12V) between VOUT and GND. 5. Connect an external load up to 7A to the VOUT and GND terminals and verify the output voltage and current. Output Voltage Setting Set the output voltage with the resistive divider (R8, R10) between VOUT and GND with the midpoint connected to FB. The output is set by the following formula : R VOUT VFB 1 8 R10 Schematic, Bill of Materials & Board Layout EVB Schematic Diagram VIN L3 1 2 1uH 1 Z3 Z4 R17 1 2 NC PAD6 PAD6 PAD6 VIN J3 J19 1 1 Z2 1 Z1 1 2 NC 1 1 1 VOUT R16 1 VIN=19V 4 1 PAD6 3 2 1 2 NC C14 C7 1000uF/25V1000uF/25V SIRA14DP Q3 2 R12 15K 1 FK4 1 1 1 1 EVB_RT8130BGJ8F-00 November 2015 1 + + 1 JP2 SIP-2P C20 NC 1 1 C22 NC C24 NC C23 2 C21 NC 2 C19 NC 1 C26 NC 1 C25 NC 1 C27 NC 1 C28 NC + C29 NC 2 R9 2 C12 1K 0 2 14.3K 2 GP5 GND 1 GP4 GND 1 1 GP3 GND FK3 C10 C11 C16 680uF/16V NC 680uF/16V R20 + R8 R10 FK2 C9 10uF/16V TP7 PGOOD NC TP6 FK1 C8 NC C13 2.2nF + NC C15 NC NC 1 10K 2 2.4uH 1 1 3 2N7002 R4 1 1 VCC G 1 R3 Q9 2 Q4 S PGOOD G VOS U1 RT8130B S Q7 NC R11 1 1 Q2 NC + LG 10 1 TP8 4 2 NC L2 1 LG R6 10K 9 S 2D FB 82pF C2 4.7nF SIRA06DP + 2 8 SIRA06DP G 2 C3 TP10 LG 2 PHASE D R2 8.2K VOUT 1 1 5 Vout=12V, Iout=6.8A 2 NC L1 2 GND Q6 NC 2 COMP/EN 2 7 1 1 UG S VCC L4 1 Q1 NC D 2 UG 3 GND C1 2.2uF/50V R14 1 PHASE 2 NC G LX R7 0 6 Q5 1 NC Q8 S BOOT G 1 GP2 NC 0 JP1 SIP-2P 1 D D R13 J2 3 2 + 1 + C6 10uF/25V TP9 UG 2.2 1 1 2 10uF/25V 2 C5 1 1 C17 10uF/25V VCC R1 J12 4 1 1 1 K K + 1 C18 0.1uF/50V 10uF/25V C4 R5 0 1 2 2 D1 1N4148 2 TP4 NC R19 1 VCC AA 1 VIN_GND 1 NC 0 0 1 NC J4 3 2 R15 1 3 2 VOUT_GND J13 4 1 TP13 VIN VCC GP1 4 1 1 NC R18 1 J1 J20 NC 2 820pF 4 3K http://www.richtek.com RT8130BGQW Evaluation Board your power partner. Bill of Materials Reference Qty Part Number Description Package Manufacture U4 1 RT8130BGQW DC/DC Controller WDFN-10L 3x3 RICHTEK C1 1 1206X7R 2200nF 2.2µF/50V X7R/1206 TDK C2 1 0603X7R 4700nF ±10% 50V 4.7nF X7R/0603 TDK C3 1 0603NPO 82pF ±5% 50V 82pF NPO/0603 WALSIN C4 1 C1608X7R1H104KT000N 0.1µF/50V X7R/0603 TDK C5, C6, C17, C18 4 C3216X5R1H106KT000N 10µF/25V X5R/1206 TDK C7, C14 1 1206X7R 2200nF ±10% 50V 1000µF/25V C9 1 C2012X5R1C106KTK0HN 10µF/16V C10, C11, C16 1 470µF/16V C12 1 820pF C0603 WALSIN C13 1 2.2nF C0603 WALSIN D1 1 1N4148_R1_00001 1N4148 RANJIT L2 1 MMD-10DZ-2R2M-X1 2.2µH Mag.Layers Q1 1 SIRA14DP VISHAY Q2, Q7 2 SIRA06DP VISHAY Q5 1 2N7002 RANJIT R1 1 2.2 R0603 R2 1 8.2K R0603 R5, R7, R13, R15, R19, R20 6 0 R0603 R6, R14 2 10K R0603 R8 1 14.3K R0603 R9 1 3K R0603 R10 1 1K R0603 R11 1 1 R0603 R12 1 15K R0603 R16, R17, R18 3 0 R0603 EVB_RT8130BGJ8F-00 November 2015 5 TDK http://www.richtek.com RT8130BGQW Evaluation Board your power partner. PCB Layout Top View (1st layer) PCB Layout—Inner Side (2nd Layer) EVB_RT8130BGJ8F-00 November 2015 6 http://www.richtek.com RT8130BGQW Evaluation Board your power partner. PCB Layout—Inner Side (3rd Layer) Bottom View (4th Layer) EVB_RT8130BGJ8F-00 November 2015 7 http://www.richtek.com RT8130BGQW Evaluation Board your power partner. More Information For more information, please find the related datasheet or application notes from Richtek website http://www.richtek.com. Important Notice for Richtek Evaluation Board THIS DOCUMENT IS FOR REFERENCE ONLY, NOTHING CONTAINED IN THIS DOCUMENT SHALL BE CONSTRUED AS RICHTEK’S WARRANTY, EXPRESS OR IMPLIED, UNDER CONTRACT, TORT OR STATUTORY, WITH RESPECT TO THE PRESENTATION HEREIN. IN NO EVENT SHALL RICHTEK BE LIABLE T O BUYER OR USER FOR ANY AND ALL DAMAGES INCLUDING WITHOUT LIMITATION TO DIRECT, INDIRECT, SPECIAL, PUNITIVE OR CONSEQUENTIAL DAMAGES. EVB_RT8130BGJ8F-00 November 2015 8 http://www.richtek.com