Users Manual RTKA2108502H00000BU Users Manual: Evaluation Board Industrial Analog and Power Rev.0.00 Sept 2018USERS MANUAL RTKA2108502H00000BU UG178 Rev.0.00 Evaluation Board Sept 12, 2018 1. Overview The RTKA2108502H00000BU evaluation board is a 8-layer FR4 board with 2oz. copper on all layers. The board measures 4.7in x 4.8in. The evaluation board includes placeholders for the pin-strap resistor population that allow for the adjustment of the output voltage, switching frequency, soft-start/stop timing, input UVLO, ASCR (Gain and Residual) parameters, and the device PMBus address. Also, fault limits can be programmed or changed easily with the PMBus compliant serial bus interface. The evaluation board makes use of the RAA210850, a 50A step-down DC/DC power supply module with an integrated digital PWM controller, dual-phase synchronous power switches, inductors, and passives. Only input, output capacitors and minimal passives are required to finish the design. The board can output a continuous current at 50A without airflow or heatsink. The RAA210850 uses a ChargeMode control (ASCR) architecture that responds to a transient load within a single switching cycle. Provided with the evaluation kit, the ZLUSBEVAL3Z (a USB to PMBus adapter) connects the evaluation board with a PC to activate the PMBus communication interface. The PMBus command set is accessed by using the PowerNavigator evaluation software from a PC running Microsoft Windows. The RTKA2108502H00000BU can operate in Pin-Strap mode without needing the ZLUSBEVAL3Z adapter or PMBus communication. 1.1 Key Features V range of 4.5V to 14V, V adjustable from 0.6V to 5V IN OUT Programmable V , input and output UVP/OVP, OTP/UTP, soft-start/stop, and external synchronization OUT Monitor: V , V , I , temperature, duty cycle, switching frequency, and faults IN OUT OUT ChargeMode control tunable with PMBus Mechanical switch for enable and a power-good LED indicator 1.2 Specifications The board has default configurations for the following operating conditions: V = 4.5V to 12V IN V = 1.2V OUT I = 50A MAX f = 421kHz SW Peak efficiency: >91% at 70% load ASCR gain = 200, ASCR residual = 90 On/off delay = 5ms, On/off ramp time = 5ms 1.3 Ordering Information Part Number Description RTKA2108502H00000BU RAA210850 Kit (Evaluation Board, ZLUSBEVAL3Z Adapter, USB Cable) UG178 Rev.0.00 Page 2 of 25 Sept 12, 2018