Test Procedure for the NV47700PDAJGEVB Evaluation Board Test Procedure: 1. Connect the test setup as is shown in Figure 1. See Table 1 with required equipment. - Letter F – Force line - Letter S – Sense line 2. Select output current limit by connecting jumper J5 – J8. - J5 – ILIM0 ~ 10 mA - J6 – ILIM1 ~ 170 mA - J7 – ILIM2 ~ 340 mA - J8 – ILIM3 – RCSO3 position available for individual current limit setting by resistor from range 728 Ω to 25.5 kΩ 3. Set Input Voltage and turn on Power Supply. 4. Enable chip by connecting jumper J3 to Vin or by external Voltage Source. Output Voltage must be higher than 3.5 V. 5. Set load current (max 350 mA) and turn on Load. 6. Monitor Output voltage, it’s given according to Equation 1. (eq. 1) 7. Monitor CSO voltage on connector J4. It should be max 2.55 V in steady state. The CSO voltage is proportional to output current according to Equation 2. (eq. 2) 8. Compare your results with measured results in Table 2. 11/21/2011 -1- www.onsemi.com Power Supply Load A - meter V - meter Voltage Source V - meter Figure 1. Test Setup Table 1: Required Equipment Equipment 11/21/2011 Ranges Power Supply 0 V – 45 V / 500 mA Voltage Source 0 V – 45 V Load 0 mA – 500 mA V - meter 0 V – 20 V A - meter 0 mA – 500 mA -2- www.onsemi.com Figure 2. PCB Layout Table 2: Measured Results Parameter Output Voltage Output Current Test Conditions Vin = 13.5 V, Vout_nom = 5.02 V, Iout = 5 mA, RCSO = Short to ground Vin = 13.5 V, Vout_nom = 5.02 V, Iout = 350 mA, RCSO = Short to ground Vin = 13.5 V, Vout_nom = 5.02 V, Vout = 0 V, RCSO = 25.5 kΩ Vin = 13.5 V, Vout_nom = 5.02 V, Vout = 0 V, RCSO = 1.5 kΩ Vin = 13.5 V, Vout_nom = 5.02 V, Vout = 0 V, RCSO = 750 Ω 11/21/2011 -3- Value Nominal Measured 5.02 Unit 5.03 V 5.02 5.04 10 170 340 10.45 175.6 353 www.onsemi.com mA