MAX17598 Evaluation Kit MAX17598 in Active-Clamp Forward Converter Topology General Description Features The MAX17598 evaluation kit (EV kit) is a fully assembled 36V DC to 72V DC Input Range and tested surface-mount circuit board that contains a Isolated Output Voltage: 3.3V DC at 8A peak-current-mode controller for an active-clamp forward Galvanic Isolation Up to 3000 V RMS regulator. The EV kit is configured for an isolated 3.3V DC output voltage that can supply up to 8A of current. The 350kHz Switching Frequen cy input voltage range is from 36V DC to 72V DC. Efficiency Up to 93.6% The EV kit demonstrates low quiescent current and Active-Clamp Forward Converter Topology efficiency up to 93.6%. High efficiency is achieved by Proven PCB Layout using an active-clamp forward converter topology, with Fully Assembled and Tested self-driven synchronous secondary MOSFETs on the output side. The EV kit is configured to operate at a 350kHz switching frequency. The surface-mount trans- Ordering Information appears at end of data sheet. former has a bias winding to power the IC after startup. An optocoupler along with the transformer provide galvanic isolation between input and output, up to 3000V RMS. Warning: The EV kit is designed to operate with high volt- ages. Dangerous voltages are present on this EV kit and on the equipment connected to it. Users who power up this EV kit or the power sources connected to it must be careful to follow safety procedures appropriately to work with high-voltage electrical equipment. Under severe fault or failure conditions, this EV kit may dissipate large amounts of power, which could result in the mechanical ejection of a component or of component debris at high velocity. Operate this EV kit with care to avoid possible personal injury. Component List DESIGNATION QTY DESCRIPTION DESIGNATION QTY DESCRIPTION 100pF 20%, 25V X7R ceramic 330F 20%, 6.3V aluminum C1 1 capacitor (0603) electrolytic capacitor C4 1 AVX 06033C101MAT2A (7.3mm x 4.3mm x 2.8mm) SANYO 6TPF330M9L 22F 20%, 100V aluminum electrolytic capacitor 47F 10%, 6.3V X7R ceramic C2 1 (8mm diameter) C5, C6 2 capacitors (1210) Panasonic EEEFK2A220P Murata GCM32ER70J476K 2.2F 10%, 100V X7R ceramic 4.7F 10%, 50V X7R ceramic C3 1 capacitor (1210) C7, C20 2 capacitors (1206) Murata GRM32ER72A225K Murata GRM31CR71H475K 19-6603 Rev 1 4/14MAX17598 Evaluation Kit MAX17598 in Active-Clamp Forward Converter Topology Component List (continued) DESIGNATION QTY DESCRIPTION DESIGNATION QTY DESCRIPTION 0.47F 10%, 25V X7R ceramic 150V, 4.1A n-channel MOSFET C8, C18 2 capacitors (0603) N3 1 (8 SO) Murata GRM188R71E474K Fairchild FDS86242 1F 10%, 25V X7R ceramic -150V, -530mA p-channel C9 1 capacitor (0805) MOSFET (3 SOT23) P1 1 Murata GRM219R71E105K Vishay Siliconix Si2325DS-T1-GE3 22nF 10%, 250V X7R ceramic C10 1 capacitor (0805) R1 1 221k 1% resistor (0805) TDK C2012X7R2E223K R2, R3 2 10 1% resistors (0603) R9, R12 2 0 5% resistors (0603) 0.047F 10%, 25V X7R ceramic C11 1 capacitor (0603) R4 1 24.9k 1% resistor (0603) Murata GRM188R71E473K R5 1 1.6M 1% resistor (0805) R6, R13 2 10k 1% resistors (0603) Not installed, ceramic C12 0 capacitorshort (PCB trace) R7 1 35.7k 1% resistor (0603) R8 1 20k 1% resistor (0603) Not installed, ceramic capacitors C13, C17 0 (0603) R10 1 221 1% resistor (0603) R11, R23 2 49.9k 1% resistors (0603) 2.2nF 10%, 50V X7R ceramic R14 1 10k 1% resistor (0603) C14 1 capacitor (0603) TDK C1608X7R1H222K R15, R16, R20 0 Not installed, resistors (0603) R17 1 470 1% resistor (0603) 1000pF 10%, 25V X7R ceramic C15 1 capacitor (0603) R18 1 28.7k 1% resistor (0603) Murata GRM188R71E102K R19 1 100 1% resistor (0603) 0.1 1% resistor (1206) 100nF 10%, 16V X7R ceramic R21 1 Panasonic ERJ-8BWFR100V C16 1 capacitor (0603) Murata GRM188R71C104K R22 1 30k 1% resistor (0603) R24 1 22k 1% resistor (0603) 33nF 10%, 25V X7R ceramic C19 1 capacitor (0603) 100H, 1.5A, 1:0.2:0.7 Murata GRM188R71E333K T1 1 transformer (EFD20) Coilcraft MA5638-BL 100V, 300mA fast-switching D1D4 4 diodes (SOD123) Peak-current-mode, active-clamp Diodes Inc. 1N4148W-7-F forward PWM controller U1 1 (16 TQFN-EP*) 10mH, 20mA inductor Maxim MAX17598ATE+ L1 1 (6.6mm x 4.45mm) API Delevan SDS680R-106M Phototransistor (4PIN, SO) U2 1 Avago ACPL-217-56AE 1.5H, 16.8A inductor L2 1 Coilcraft SER1410-152ME 1.24V 0.5% shunt regulator U3 1 (3 SOT23) 25V, 58A n-channel MOSFETs Diodes Inc. TLV431BFTA N1, N2 2 (8 PG-TDSON) Infineon BSC050NE2LS PCB: MAX17598 EVALUATION 1 KIT *EP = Exposed pad. Maxim Integrated 2 www.maximintegrated.com